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ENTERPRISE METALS LIMITED — Capital/Financing Update 2014
Jul 7, 2014
64857_rns_2014-07-07_d7e05865-5149-4bae-9267-7e627fa4bf2d.pdf
Capital/Financing Update
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ASX ANNOUNCEMENT ACN 123 567 073 8 July 2014
BASE METAL SULPHIDES DETECTED IN SHALE & CARBONATE UNITS IN DEEPER DOOLGUNNA RC HOLES
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Final assay results from Doolgunna RC drilling show trace base metal sulphides in fresh rock, adjacent to 2.5km diameter Borg sediment hosted base metal target
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Relogging of Borg drill chips under microscope shows laminated base metal sulphides hosted by black shales and carbonates (limestone)
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Assays from infill Maglag[1] samples highlight discrete SEDEX[2] style base metal targets for follow-up by geophysics and drilling at Borg and Azan
Enterprise Metals Limited (“Enterprise”; “the Company”, ASX: ENT) is pleased to announce that it has received final assays from 4m composite RC samples and 1m original RC samples from its recently completed drill program, which tested coincident airborne EM and ground EM/gravity targets in the Doolgunna basin. A total of 36 RC drill holes were completed for a total of 4,166 metres at the Borg, Azan, Chekov, Elim, Dax and Forge prospects. (Refer ENT: ASX release 17[th] April 2014)
The RC drill traverses over each target were designed to test anomalies from a 2012 CSIRO sponsored SPECTREM[3] airborne EM survey. The SPECTREM survey was reconnaissance in nature, with north - south lines flown at a line spacing of 5,500 metres. This survey detected a number of conductors classified as “ excellent ” by the CSIRO. (Refer ENT: ASX release 24[th] April 2013)
Coincident with the drilling program, the Company also collected 2,356 regional and infill surface Magnetic lag (Maglag) samples. The Maglag samples were collected to provide better definition of broad regional Maglag anomalies that had been generated by previous Enterprise sampling on a 1km x 1km grid. Assays from the infill Maglag sampling program have highlighted discrete SEDEX style base metal targets at Borg and Azan for follow-up by geophysics and drilling.
Footnotes :
1. Maglag Sampling : Historical studies by consultants to the Company have shown that using a four acid digest on magnetic lag samples effectively liberates the chalcophile (and other less soluble pathfinder elements) in the Doolgunna area, giving a superior signal to noise ratio than either fine or coarse soils. Anomalous base metal values in Maglag samples probably reflect the physical dispersion of gossanous material
2. SEDEX Style Deposits : are fine-grained sediment–hosted Cu-Pb-Zn-Ag deposits of mid-Proterozoic age which may or may not be exhalative.
3. SPECTREM Survey : The SPECTREM system was developed to provide superior depths of penetration in the search for buried, conductive ore bodies, particularly in surficial conductive exploration terrains. Due to the broadband nature of its transmitted waveform, the SPECTREM system has the ability to simultaneously map shallow as well as deeper features with a very high level of resolution.
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ASX Release 8 July 2014
ENTERPRISE METALS LIMITED
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The drilling has confirmed that anomalous base metals values obtained in surficial Maglag samples are reflecting base metal anomalism associated with sulphide mineralisation in fresh rocks at depth. The Company is pleased with the results of its recent exploration programs, which have provided key supporting evidence for the Company’s sediment hosted base metal (SEDEX) search (see Table below).
| see Table below). | ||
|---|---|---|
| Key SEDEX Targeting Criteria | Evidence | |
| Tectonic setting Rift, sag, deformation |
Yerrida Basin Capricorn Orogen |
|
| Source rocks Copper rich |
Volcanics Basalts at base of sediments |
|
| Heat flow Hydrothermal systems |
Archaean Goodin Dome Radiogenic heat |
|
| Major Structures Basin bounding faults |
Southern Boundary Fault Goodin Fault |
|
| Favourable Hosts Black shales & dolomitic rocks |
Intersected in recent RC drilling |
Commenting on these results, Enterprise’s Chairman Dr Jinbing Wang, said:
“We are very pleased with the recent progress made at Doolgunna by our exploration team. We believe that the Company has a sound exploration model and we also believe that the Doolgunna project area satisfies most of our targeting criteria.
In particular, the recent work has highlighted the 2.5km diameter Borg prospect as an outstanding base metal target, which requires some further geophysics prior to drill testing. Given the large size and strategic nature of our 1,000km[2] landholding at Doolgunna, we are confident that world class base metals deposits will be found in the coming months and years. The Company is also very appreciative of the co-funding for drilling provided by the West Australian State Government’s “Royalties for Regions Program, Exploration Incentive Scheme.”
FINAL RC DRILLING RESULTS
During the March Quarter 2014, the Company drilled two SPECTREM airborne EM - ground - gravity targets at the Borg and Azan prospects. Four metre composite sample results for 33 of the 36 holes were reported to the ASX on 17[th] and 30[th] April 2014. Sample results from one metre original samples (selected from anomalous 4m composite samples) and four metre composite sample results from AZRC007 (112-169m) and AZRC008 and AZRC009 have now been received.
This RC drill program represents the first concerted drill test of unoxidised sediments within the Doolgunna basin, and the results received to date provide evidence for widespread mineralising events with large alteration zones which have the potential to contain ore grade base metal concentrations. The analyses and recovered drill chips suggest that the combined gravity/EM features represent mineralised shale and carbonate (dolomite) sequences containing base metal mineralisation and associated silica flooding, pyrite and hematite alteration.
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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Figure 1. Doolgunna SEDEX Prospect Locations on 1VD Magnetic Image with 1VD Bouguer Anomaly Gravity Data
BORG PROSPECT
At the Borg prospect, holes BGRC001 - 006 tested the B1, B2 & B3 targets, and demonstrated that the two gravity highs are part of a broad NE-SW trending gravity ridge which is composed of silicified and mineralised sulphidic shales and dolomitic limestone in fresh rock. The mineralised zone (gravity ridge) is open to the NE and SW.
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Figure 2. Borg Prospect. Bouguer Anomaly Gravity Image & RC Drill Collars (BGR)
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ASX Release 8 July 2014
ENTERPRISE METALS LIMITED
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A summary of anomalous intercepts at Borg, based on +100ppm Cu, or +100ppm Pb or +100ppm Zn or +100ppm As cut off grades is shown in Table 1 below.
Table 1 . Borg RC: Anomalous Base Metal Results
| Hole ID |
From m |
Int m |
Sample **Type ** |
Au **ppb ** |
As **ppm ** |
Bi **ppm ** |
Cd **ppm ** |
Mo **ppm ** |
S % |
Sb **ppm ** |
W **ppm ** |
Cu **ppm ** |
Pb **ppm ** |
Zn **ppm ** |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BGRC001 | 13 | 14 | 1m | 5 | 107 | 2 | 2 | 10 | 0.05 | 14 | 5 | 314 | 83 | 72 |
| BGRC001 | 27 | 24 | 1m | BD | 47 | 3 | BD | 4 | BD | 6 | 4 | 239 | 50 | 46 |
| BGRC001 | 51 | 17 | 1m | 4 | 72 | 5 | 3 | 6 | 0.02 | 9 | 7 | 204 | 61 | 234 |
| BGRC002 | 68 | 12 | 1m | BD | 49 | 2 | 2 | 3 | 0.00 | 4 | 5 | 73 | 22 | 517 |
| BGRC004 | 12 | 8 | 1m | BD | 143 | 3 | 4 | 3 | 0.00 | 3 | 7 | 161 | 42 | 1,008 |
| BGRC004 | 20 | 95 | 1m | 2 | 27 | 2 | 2 | 1 | 0.05 | 2 | 3 | 52 | 43 | 583 |
| BGRC004 | 115 | 5 | 1m | 26 | 179 | 5 | 4 | 3 | 2.56 | 15 | 5 | 89 | 166 | 943 |
| BGRC005 | 56 | 10 | 1m | 8 | 417 | 2 | 1 | 4 | 1.74 | 9 | 9 | 45 | 300 | 19 |
| BGRC006 | 40 | 14 | 1m | 8 | 70 | BD | 1 | 4 | 0.14 | 3 | 5 | 60 | 561 | 48 |
| BGRC006 | 54 | 10 | 1m | 25 | 2,331 | BD | 40 | 1 | 3.17 | 42 | 7 | 28 | 469 | 29 |
| BGRC006 | 64 | 20 | 1m | 11 | 316 | BD | 5 | 2 | 0.98 | 7 | 69 | 20 | 193 | 15 |
| BGRC008 | 60 | 61 | 1m | 5 | 72 | BD | 2 | BD | 0.03 | BD | 3 | 997 | 52 | 227 |
| BGRC014 | 0 | 64 | 4m | 2 | 51 | BD | 1 | 3 | NA | 1 | 1 | 44 | 23 | 124 |
| BGRC014 | 80 | 23 | 1m | 6 | 516 | BD | 16 | BD | 1.65 | 14 | 4 | 12 | 116 | 37 |
| BGRC014 | 113 | 7 | 1m | 4 | 108 | BD | 3 | 0 | 0.52 | 3 | 1 | 11 | 173 | 77 |
| BGRC015 | 0 | 40 | 4m | BD | 71 | BD | 1 | 2 | NA | 1 | BD | 42 | 18 | 263 |
| BGRC015 | 40 | 28 | 1m | 9 | 25 | BD | BD | 1 | NA | 2 | 3 | 95 | 31 | 304 |
| BGRC015 | 68 | 60 | 4m | BD | 16 | BD | BD | BD | NA | BD | BD | 61 | 10 | 132 |
| BGRC015 | 128 | 6m | 1m | BD | 18 | BD | BD | BD | 0.29 | 3 | 4 | 90 | 16 | 136 |
| BGRC015 | 134 | 26 | 1m | 8 | 32 | BD | BD | 2 | 1.43 | 5 | 4 | 101 | 31 | 407 |
| BGRC016 | 108 | 24 | 1m | BD | 8 | BD | BD | BD | NA | 2 | 4 | 562 | 47 | 45 |
| BGRC016 | 132 | 35 | 1m | 5 | 22 | BD | BD | BD | NA | BD | 6 | 87 | 28 | 121 |
| BGRC017 | 76 | 62 | 4m | BD | 16 | BD | BD | BD | NA | BD | BD | 77 | 16 | 165 |
BD: Below detection N/A: Not analysed
Note : Some narrow higher grade intervals included:
BGRC004 : 3m @ 1,590ppm Zn from 14m
BGRC004: 1m @ 3,437ppm Zn from 91m
BGRC004 : 2m @ 2,119ppm Zn from 115m (See Plate 1 overleaf)
BGRC006: 1m @ 1,792ppm Pb from 63m
Re-logging of washed RC drill chips under laboratory conditions and with the aid of a microscope has identified a number of 1 metre intervals with visible sulphides.
Examples from holes BGRC004 and BGRC 014 are shown overleaf in Plates 1 and 2.
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ENTERPRISE METALS LIMITED
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Plate 1. Hole BGRC004 RC Chip Samples: 113m - 116m. Laminated sulphides in carbonates & black shales
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Plate 2. BGRC014 RC Chip Samples: 84m - 88m . Matrix sulphides in siliceous breccia (quartzite?)
The anomalous base metal analyses and observed sulphides in RC drill chips explain the anomalous values of Bi, Cd, Mo, As, Te, W and Sb encountered in the Company’s previously reported 1km by 1km spaced maglag sampling program.
The Company considers that the base metal sulphides detected to date provide strong support for the Company's SEDEX targeting model, and for further exploration.
Coincident with the RC drilling program, the Company also collected 2,356 regional and infill surface magnetic lag (“Maglag”) samples. These Maglag samples were collected to provide better definition of broad regional maglag anomalies that had been generated by previous 1km by 1km Enterprise Maglag samples.
Historical studies by the Company have shown that using a four acid digest on Maglag samples effectively liberates the chalcophile (and other less soluble pathfinder elements) in the Doolgunna area, giving a superior signal to noise ratio than either fine soils (-75 microns) or coarse soil samples. (-4mm+2mm)
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ENTERPRISE METALS LIMITED
Anomalous base metal values in Maglag samples probably reflect the physical dispersion of gossanous material, whereas the presence of anomalies in fine fraction soil samples probably reflects hydromorphic dispersion alone. The other advantage of Maglag is that it samples a common medium (maghemite and associated Fe hydroxides) across a variable regolith terrain and the resulting geochemical data does not need to be normalised for iron.
At the Borg prospect, the previous 1km x 1km Maglag sampling was infilled to 250m x 250m, with one line of 100m sample spacing through the centre of the Borg geochemical anomaly.
Refer Figure 3 for sample locations.
The Maglag assay results, which were not received until well after the drilling was completed, show a distinct multi-element base metal anomaly, just to the east of Enterprise’s line of RC holes.
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Figure 3. Te Maglag Sample Locations on 1st VD Magnetics
Refer Figure 4, for ENT RC drill hole locations over the Tellurium assay results.
Three historical RC holes drilled by CRA Exploration Pty Ltd (CRAE) in 1992 are also shown in Figure 4. (MLA034, MLA035, MLA036)
These holes were drilled by CRAE while following up base metal anomalism recorded in heavy mineral concentrates from a loam sampling program, directed at diamond exploration.
It appears that both the Enterprise Metals and CRAE drill holes flank the 2.5km wide Borg Maglag target.
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Figure 4. Te Maglag Geochem Image over 1st VD Magnetics
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ENTERPRISE METALS LIMITED
A schematic west-east cross section showing the interpreted Borg target with drill holes is shown below in Figure 5.
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Figure 5. Schematic West to East Cross Section over Borg Maglag Geochemical Target
Maglag images of other pathfinder elements are shown in Figures 6 to 1.
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Figure 6. Tungsten Maglag Geochemical Image
Figure 7. Antimony Maglag Geochemical Image
www.enterprisemetals.com.au
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872
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ENTERPRISE METALS LIMITED
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Figure 7. Molybdenum Maglag Geochemical Image
Figure 8. Arsenic Maglag Geochemical Image
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Figure 9. Lead Maglag Geochemical Image
Figure 10. Copper Maglag Geochemical Image
It is apparent from these and other maglag assay results that the less soluble base metal s are being retained in the “magnetic lag” fraction of surface samples, whilst the more soluble elements (such as copper and zinc) are likely being dissolved and depleted by the action of “acid leaching” created by the combination of ground water and sulphides.
Refer Figure 11 overleaf for an image of maglag sulphur geochemistry, showing a distinct “Sulphur geochemical low”. Note: the higher sulphur values to the east of Borg are located over a calcrete rich palaeochannel containing gypsum, ie. calcium sulphate (CaSO4·2H2O).
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
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ENTERPRISE METALS LIMITED
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Figure 11. Sulphur Maglag Geochemistry Image over 1st VD Magnetic Image
AZAN PROSPECT
At the Azan prospect, 6 shallow vertical RC holes (AZRC001 - 006) and 3 deeper angled RC holes (AZRC007 – 009) were drilled to test two GEM/gravity features which also had anomalous surface geochemistry. All holes encountered sediments with anomalous values of As, Cu, Zn and Sb in the transition zone. The best results were from AZRC004 (14m @ 386ppm Cu from 30m depth) which tested the western edge of the A2 gravity feature, and from the bottom of hole AZRC009 (12m @ 373ppm Cu from 148m depth)
Table 2. Azan RC: Anomalous Base Metal Results using +100ppm Cu or 100ppm Zn Cut off
| Hole ID |
From (m) |
Interval (m) |
Sample Type |
Ag ppm |
As ppm |
Mo ppm |
Sb ppm |
Cu ppm |
Zn ppm |
|---|---|---|---|---|---|---|---|---|---|
| AZRC001 | 68 | 8 | 1m | 0.7 | 10 | 3 | BD | 260 | 152 |
| AZRC003 | 64 | 12 | 1m | 0.6 | 22 | BD | BD | 178 | 93 |
| AZRC004 | 30 | 14 | 1m | 6.8 | 21 | BD | BD | 165 | 386 |
| AZRC007 | 113 | 13 | 1m | BD | 37 | 1 | 6 | 284 | 290 |
| AZRC007 | 137 | 11 | 1m | BD | 170 | 1 | 7 | 206 | 108 |
| AZRC007 | 157 | 8 | 1m | BD | 36 | 3 | 4 | 169 | 107 |
| AZRC008 | 0 | 24 | 4m | BD | 65 | 3 | 3 | 194 | 162 |
| AZRC009 | 20 | 64 | 4m | BD | 42 | 1 | BD | 178 | 53 |
| AZRC009 | 84 | 13 | 1m | BD | 77 | 2 | 6 | 216 | 99 |
| AZRC009 | 97 | 19 | 1m | BD | 35 | 1 | 1 | 87 | 283 |
| AZRC009 | 116 | 32 | 4m | BD | 9 | BD | BD | 93 | 133 |
| AZRC009 | 148 | 12 | 1m | BD | 18 | BD | BD | 67 | 373 |
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
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ENTERPRISE METALS LIMITED
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Figure 12. Azan Prospect. Bouguer Anomaly Gravity Image & RC Drill Hole Collars
CHEKOV PROSPECT
At the Checkov prospect, 2 deep RC holes (CKRC001 -002) were drilled to test a combined gravity and GEM target. Both holes intersected zones of anomalous zinc mineralization, with narrow higher grade lead and zinc zones in CKRC002.
Table xxx. Chekov RC: Anomalous Base Metals using +100ppm Cu or 100ppm Zn Cut off
| Hole ID |
From m |
Interval m |
Sample **Type ** |
Au **ppb ** |
As **ppm ** |
Sb **ppm ** |
W **ppm ** |
Pb **ppm ** |
Cu **ppm ** |
Zn **ppm ** |
|---|---|---|---|---|---|---|---|---|---|---|
| CKRC001 | 40 | 20 | 1m | 5 | 20 | 12 | 4 | 28 | 101 | 266 |
| CKRC002 | 44 | 14 | 1m | 12 | 35 | 17 | 2 | 30 | 213 | 163 |
| CKRC002 | 67 | 29 | 1m | 6 | 24 | 70 | 4 | 231 | 275 | 456 |
| inc | 69 | 2 | 1m | 3 | 131 | 10 | 7 | 18 | 1,337 | 1,276 |
| inc | 85 | 2 | 1m | 3 | 21 | 5 | 1,915 | 161 | 641 |
ELIM PROSPECT
At the Elim prospect, 3 deep RC holes (EMRC001 – 003) were drilled to test three gravity/GEM targets. No significant results were obtained from EMRC001 and 002, but a broad zone of copper and zinc mineralization was intersected in EMRC003. See Figure 13 overleaf for location of drillholes.
EMRC003: 32m @ 330ppm Cu, 210 ppm Zn from 64m depth.
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ENTERPRISE METALS LIMITED
FORGE PROSPECT
At the Forge prospect, 3 deep RC holes (FGRC001 -003) were drilled to test a combined gravity and GEM target. No significant results were obtained from FGRC001 – 003, although FGRC003 intersected Proterozoic dolerite. See Figure 13 below for location of drillholes.
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Figure 13. Chekov, Elim & Forge. Bouguer Anomaly Gravity Image & Targets
DAX PROSPECT
At the Dax prospect, 2 deep RC holes (DXRC001 - 002) were drilled to test a combined gravity and GEM target. Hole DXRC001 intersected goethitic alteration associated with silicified shales in the interval 150 – 159m.
DXRC001: 10m @ 250ppm Cu, 5ppm Sb, 12ppb Au from 150m depth.
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Figure 14. Dax Prospect. Bouguer Anomaly Gravity Image & Targets & RC Holes
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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ENTERPRISE METALS LIMITED
OTHER REGIONAL AND INFILL MAGLAG SAMPLING ASSAYS
Illustrated in Figures 15 to 18 are images of maglag assay results from selected other elements. Enterprise believes that integration of the 61 element maglag assay dataset with the Company’s regolith interpretation will produce further base metals targets for geophysics and drill testing.
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Figure 15. Molybdenum - Regional and Infill Maglag Geochemical Image
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Figure 16. Tungsten - Regional and Infill Maglag Geochemical Image
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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Figure 17. Tellurium - Regional and Infill Maglag Geochemical Image
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Figure 18. Sulphur - Regional and Infill Maglag Geochemical Image Note: “Sulphur lows” over Azan, Borg and Dax.
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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Dermot Ryan Managing Director
Competent Persons statement
The information in this report that relates to Exploration Results and Mineral Resources is based on information compiled by Mr Dermot Ryan, who is an employee of the Company. Mr Ryan is a Fellow of the Australasian Institute of Mining and Metallurgy and a Member of the Australian Institute of Geoscientists and has sufficient experience of relevance to the styles of mineralisation and the types of deposits under consideration, and to the activities undertaken, to qualify as a Competent Person as defined in the 2012 Edition of the Joint Ore Reserves Committee (JORC) Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Ryan consents to the inclusion in this report of the matters based on information in the form and context in which it appears.
Exploration results are based on standard industry practices, including sampling, assay methods, and appropriate quality assurance quality control (QAQC) measures. Reverse circulation (RC) drilling samples were collected as 1 metre original samples and as composite samples of 4 metres using a constant volume PVC scoop or spear. Mineralised intersections identified from 4m composite samples were subsequently reassayed using the 1 metre original samples to better define grade distribution. The 4m composite samples (~3kg) were pulverised to give a 10g sample for aqua regia digest and ICP-MS and OES analysis of 32 elements: Ag, Al, As, Ba, Bi, Ca, Cd, Ce, Co, Cu, Fe, K, La, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Sc, Sr, Te, Ti, Tl, V, W, Zn, and by 25g samples analysed by MS for gold (after aqua regia digest). Original 1m samples were then collected from the field after geochemically anomalous 4m intervals were identified. Original 1m samples were submitted for 4 acid digest and assayed by ICP – OES for; Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sb, Sc, Sn, Sr, Te, Ti, Tl, V, W, Zn. Gold was assayed by Fire Assay, using a 50g AAS technique. All RC analyses were undertaken by Minanalytical Laboratory Services Australia. Maglag samples were pulverised and subjected to a 4 acid digest and analysis by a low level detection method ICP-MS & ICP-OES Package for 61 elements at Minanalytical Laboratory Services Australia.
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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Appendix 1. Doolgunna Project, 2014 Drill Collar Locations
| Hole | East | North | Dip (deg) |
Azimuth (deg) |
Depth (m) |
Tenement |
|---|---|---|---|---|---|---|
| AZRC001 | 728,872 | 7,154,979 | -90 | 0 | 119 | E52/2049 |
| AZRC002 | 729,054 | 7,154,003 | -90 | 0 | 72 | E52/2049 |
| AZRC003 | 729,470 | 7,154,176 | -90 | 0 | 85 | E52/2049 |
| AZRC004 | 729,305 | 7,153,686 | -90 | 0 | 82 | E52/2049 |
| AZRC005 | 730,231 | 7,154,528 | -90 | 0 | 89 | E52/2049 |
| AZRC006 | 730,521 | 7,154,128 | -90 | 0 | 69 | E52/2049 |
| BGRC001 | 719,156 | 7,146,267 | -90 | 0 | 120 | E51/1304 |
| BGRC002 | 718,664 | 7,145,324 | -90 | 0 | 92 | E51/1304 |
| BGRC003 | 718,649 | 7,145,346 | -90 | 0 | 115 | E51/1304 |
| BGRC004 | 718,674 | 7,145,956 | -90 | 0 | 120 | E51/1304 |
| BGRC005 | 718,219 | 7,146,543 | -90 | 0 | 80 | E51/1304 |
| BGRC006 | 718,088 | 7,146,387 | -90 | 0 | 88 | E51/1304 |
| BGRC007 | 719,809 | 7,144,798 | -90 | 0 | 91 | E51/1304 |
| BGRC008 | 719,698 | 7,144,654 | -90 | 0 | 61 | E51/1304 |
| BGRC009 | 719,827 | 7,143,811 | -90 | 0 | 73 | E51/1304 |
| BGRC010 | 721,363 | 7,142,865 | -90 | 0 | 48 | E51/1304 |
| BGRC011 | 721,100 | 7,143,177 | -90 | 0 | 43 | E51/1304 |
| BGRC012 | 721,066 | 7,144,502 | -90 | 0 | 59 | E51/1304 |
| BGRC013 | 720,376 | 7,144,113 | -90 | 0 | 55 | E51/1304 |
| CKRC001 | 701,685 | 7,120,992 | -60 | 180 | 150 | E51/1168 |
| CKRC002 | 701,876 | 7,121,408 | -60 | 135 | 174 | E51/1168 |
| DXRC001 | 697,438 | 7,127,914 | -60 | 138 | 180 | E51/1079 |
| DXRC002 | 697,804 | 7,127,482 | -60 | 136 | 150 | E51/1079 |
| EMRC001 | 696,952 | 7,120,779 | -60 | 138 | 150 | E51/1168 |
| EMRC002 | 697,472 | 7,120,104 | -60 | 135 | 180 | E51/1168 |
| EMRC003 | 698,343 | 7,119,028 | -60 | 135 | 160 | E51/1168 |
| FGRC001 | 691,593 | 7,119,804 | -60 | 135 | 132 | E51/1168 |
| FGRC002 | 691,789 | 7,119,569 | -60 | 135 | 120 | E51/1168 |
| FGRC003 | 692,156 | 7,119,057 | -60 | 135 | 84 | E51/1168 |
| AZRC007 | 728,380 | 7,154,280 | -60 | 180 | 169 | E52/2049 |
| AZRC008 | 729,201 | 7,153,994 | -60 | 180 | 160 | E52/2049 |
| AZRC009 | 728,551 | 7,153,941 | -60 | 180 | 160 | E52/2049 |
| BGRC014 | 718,026 | 7,146,295 | -60 | 137 | 168 | E51/1304 |
| BGRC015 | 718,669 | 7,145,255 | -60 | 130 | 160 | E51/1304 |
| BGRC016 | 719,833 | 7,144,930 | -60 | 138 | 170 | E51/1304 |
| BGRC017 | 719,155 | 7,144,390 | -60 | 135 | 138 | E51/1304 |
| Total 4166 |
All holes: Grid: MGA94_Zone 50
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Page | 15
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JORC Code, 2012 Edition – Table 1 report 8 July 2014 – Doolgunna Project
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
| Criteria | Commentary | Commentary | Commentary | Commentary | Commentary | Commentary | Commentary | Commentary |
|---|---|---|---|---|---|---|---|---|
| Sampling & assay techniques |
• Drilling at Doolgunna between February – April 2014 consisted of 17 angled and 19 vertical Reverse Circulation (RC) drill holes. • Representative 3kg 1 metre RC samples were produced by a cyclone and splitter system fitted to side of the drill rig. • Representative 4m composite RC samples were collected using a constant volume PVC scoop. These 4m composite samples (~3kg) were pulverised to give a 10g sample for aqua regia digest and ICP-MS and OES analysis of 32 elements: Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Sc, Sr, Te, Ti, Tl, V, W, Zn, And by 25g samples analysed by MS for gold (after aqua regia digest. • Original 1m RC samples were then collected from the field after geochemically anomalous 4m intervals were identified. Original 1m samples to be submitted for 4 acid digest and assayed by ICP – OES for; Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cu, Fe, K, La, Li, Mg, Mn, Mo, Na, Ni, P, Pb, S, Sb, Sc, Sn, Sr, Te, Ti, Tl, V, W, Zn. Gold to be assayed by Fire Assay, using a 50g AAS technique. • For “maglag” sampling, lag was swept up with a plastic dust pan and brush over about a 5 m diameter area. (for ~ 2 kg sample). Coarse pebbles, sticks, etc (greater than 1 or 2 cm) were swept out on to a plastic sheet and any organic material was removed. A MAGSAM 300_“rare earth_” magnetic sampler from Pathfinder Exploration was used to collect the magnetic fraction (between 50-100gms). • Maglag samples were pulverised and subjected to a 4 acid digest and analysis by a low level detection method of 61 elements ICP-MS & ICP-OES Package (4A-ICPMS- MA40MS MA40-OES) at Minanalytical Laboratory Services Australia. ICPMS- MA40MS Elements and Ranges (ppm) Ag 0.01-100 Ga 0.05-1000 Pb 0.2-1% Te 0.01-500 As 0.5-1% Gd0.02-500 Pr 0.01-500Th 0.1-1% Ba 2-1000 Ge 0.05-1000 Rb 0.05-1% Tl 0.02-1000 Be 0.05-1000 Hf 0.01-500 Re 0.001-100Tm0.01-500 Bi 0.01-1% Ho 0.01-500 Sb 0.05-1% U 0.02-1% Cd 0.01-1000 In 0.005-500 Sc 0.1-1% W 0.05-1% Ce 0.02-500 La 0.1-1000 Se 0.5-1000Y 0.05-1000 Co 0.1-1% Li 0.1-1000 Sm 0.01-500Yb 0.01-500 Cs 0.05-1000 Lu 0.01-500 Sn 0.2-500 Zr 0.5-500 Dy 0.01-500 Mo0.05-1% Sr 0.1-1% Er 0.01-500 Nb 0.05-1000 Ta 0.01-100 Eu 0.01-500 Nd 0.01-500 Tb 0.01-500 ICP-MA40 - OES Elements and Ranges (ppm) |
|||||||
| ICPMS- MA40MS Elements and Ranges (ppm) | ||||||||
| Ag | 0.01-100 | Ga | 0.05-1000 | Pb | 0.2-1% | Te | 0.01-500 | |
| As | 0.5-1% | Gd | 0.02-500 | Pr | 0.01-500 | Th | 0.1-1% | |
| Ba | 2-1000 | Ge | 0.05-1000 | Rb | 0.05-1% | Tl | 0.02-1000 | |
| Be | 0.05-1000 | Hf | 0.01-500 | Re | 0.001-100 | Tm | 0.01-500 | |
| Bi | 0.01-1% | Ho | 0.01-500 | Sb | 0.05-1% | U | 0.02-1% | |
| Cd | 0.01-1000 | In | 0.005-500 | Sc | 0.1-1% | W | 0.05-1% | |
| Ce | 0.02-500 | La | 0.1-1000 | Se | 0.5-1000 | Y | 0.05-1000 | |
| Co | 0.1-1% | Li | 0.1-1000 | Sm | 0.01-500 | Yb | 0.01-500 | |
| Cs | 0.05-1000 | Lu | 0.01-500 | Sn | 0.2-500 | Zr | 0.5-500 | |
| Dy | 0.01-500 | Mo | 0.05-1% | Sr | 0.1-1% | |||
| Er | 0.01-500 | Nb | 0.05-1000 | Ta | 0.01-100 | |||
| Eu | 0.01-500 | Nd | 0.01-500 | Tb | 0.01-500 | |||
| ICP-MA40 - OES Elements and Ranges (ppm) |
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| Criteria | Commentary | Commentary | ||||||
|---|---|---|---|---|---|---|---|---|
| Ag | 0.5-100 | Co | 1-1% | Mo | 1-1% | Sr | 1-1% | |
| Al | 0.01%-10% | Cr | 1-1% | Na | 0.01%-10% | Te | 2-500 | |
| As | 2-1% | Cu | 1-1% | Ni | 1-1% | Ti | 0.01%-10% | |
| Ba | 5-1% | Fe | 0.01%-50% | P | 20-1% | Tl | 10-1000 | |
| Be | 0.5-1000 | K | 0.01%-10% | Pb | 2-1% | V | 2-1% | |
| Bi | 5-1% | La | 20-1000 | S | 0.01%-5% | W | 1-1% | |
| Ca | 0.01%-25% | Li | 1-1000 | Sb | 2-1% | Zn | 2-1% | |
| Cd | 1-1000 | Mg | 0.01%-20% | Sc | 1-1% | |||
| Ce | 20-500 | Mn | 2-1% | Sn | 5-1% | |||
| Drilling techniques |
• Drilling involved a combination of angled and vertical Reverse |
Circulation holes | ||||||
| Drill sample recovery |
• Sample recoveries not measured, poor samples commented on in logs. • RC samples are collected in polythene bags. • Recovery was not measured. All wet samples have been logged and recorded in the database accordingly. |
|||||||
| Logging | • Geological logging of drill chip samples has been recorded for each drillhole including lithology, mineralisation, grainsize, texture, oxidation, weathering, colour and wetness. • Logging is qualitative. For RC drilling every 1m interval was collected, sieved and a sample retained in a plastic chip tray. • All drillholes were logged for the full extent of each hole. |
|||||||
| Sub-sampling techniques and sample preparation |
• No core drilling undertaken. • 4m composite RC samples were collected using a spear when dry and a PVC scoop if wet from bulk drill samples. • The sample preparation of drill chip samples follows industry best practice involving oven drying, coarse crush, sieve -80# sufficient for a 50g aqua regia digestion. • QC procedures involve the review of laboratory supplied certified reference materials and field duplicates. These quality control results are reported along with sample values in the final analysis report. Selected intervals are assayed at other laboratories for comparison at times. • Sample sizes are considered to be appropriate to correctly represent the style of mineralisation style. |
|||||||
| Quality of assay data and laboratory tests |
• The analytical techniques for 4m composite samples used aqua regia digest multi element suite with ICP-MS finish suitable for reconnaissance as a first pass. • Re-split or original 1m samples were dissolved with a four acid digest for the same elements and gold was assayed by fire assay in these samples this method is a full digest. • No geophysical tools were used to determine any element concentrations at this stage. • Laboratory QC involves the use of internal lab standards using certified reference material, blanks, splits and replicates aspart of the in houseprocess. |
|||||||
| Verification of sampling and |
• Primary drilling data was collected using a set of standard Excel templates and re- entered into laptopcomputers. The information was sent to Enterprise’s in-house |
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Page | 17
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ENTERPRISE METALS LIMITED
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| Criteria | Commentary | Commentary |
|---|---|---|
| assaying | database manager for validation and loading into a SQL database server. | |
| • | No adjustments or calibrations were made to anyassaydata used in this report. | |
| Location of | • | Drill hole collar locations were surveyed by a modern hand held GPS unit with an |
| data points | accuracy of 5m which is sufficient accuracy for the purpose of compiling and interpreting | |
| the results. | ||
| • | Topographic control is by NASA Shuttle Radar Topography Mission (SRTM). | |
| • | Thegrid system is MGA GDA94 Zone 50. | |
| Data spacing | • | RC drill hole spacing was chosen to test a number of Ground EM and Gravity |
| and distribution |
• | anomalies. Spacing between holes was not fixed. Drill hole spacing is not sufficient to determine degree of grade or geological continuity. |
| • | No additional sample compositing was used apart from the standard 4m composite | |
| sampling. | ||
| Orientation of | • | The drilling was conducted orthogonal to strike of the sedimentary sequence interpreted |
| data in relation to geological |
• | from aeromagnetic data and geological mapping. Maglag samples were collected on a rectangular/square east-west grid. |
| structure | ||
| Sample | • | Samples were secured in bulka bags and delivered to the Laboratory by a reputable |
| security | carrier. | |
| Audits or | • | Regular internal reviews are occurring, but no external reviews have been undertaken. |
| reviews |
Section 2 Reporting of Exploration Results
(Criteria listed in the preceding section also apply to this section.)
| Criteria | Commentary |
|---|---|
| Mineral tenement and land tenure status |
•The Doolgunna Project consists of multiple contiguous exploration licences and covers approximately 1,036km2and is located 110km northeast of Meekatharra and some 10km southwest of Sandfire Resources NL’s (Sandfire) 2009 DeGrussa copper-gold discovery. •The GEM and gravity prospects referred to are all on granted tenements held 100% by either Enterprise Metals Limited or one its wholly owned subsidiaries. The tenements are all in good standing. •The drilled prospects are either on former Doolgunna or Mooloogool pastoral leases, now administered by the WA Government Department of Parks and Wildlife (DPaW), Mt Padbury or Killara pastoral leases, or Vacant Crown Land. (see table below). Prospect Teneme nt Grant Date Expiry Date Land Borg E51/1304 28/06/2010 27/06/2015 Former Doolgunna & Mooloogool Pastoral Leases Azan E52/2049 27/10/2008 26/10/2018 Former Doolgunna Pastoral Lease Dax E51/1079 25/07/2006 24/07/2015 Mt Padbury Pastoral Lease Chekov E51/1168 11/11/2008 10/11/2018 Vacant Crown Land Forge E51/1168 11/11/2008 10/11/2018 Killara Pastoral Lease Elim E51/1168 11/11/2008 10/11/2018 KillaraPastoral Lease •There are no royalties attached to any of these tenements. •The prospects are covered by the Yugunga-Nya [WAD6132/98] Native Title Claim Group. Native Title Agreements, administered by the Yamatji Marlpa Aboriginal Corporation are inplace for the relevant tenements. |
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Page | 18
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ENTERPRISE METALS LIMITED
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| Criteria | Commentary | Commentary |
|---|---|---|
| Exploration | • | A summary of previous exploration activities was provided in the Company’s 2013 |
| done by other parties |
• |
Annual Report. There has been little exploration conducted by other parties in the areas of the |
| Company’s AEM, GEM and gravity targets other than “metal detecting” for alluvial gold | ||
| by prospectors. The Company’s GEM and gravity targets have not been previously | ||
| tested by drilling. | ||
| • | During the period 2001 – 2003, Murchison Exploration Pty Ltd carried out regional 1km x | |
| 1km spaced_“mag-lag sampling_” over the project area. Limited infill sampling was | ||
| subsequently undertaken in selected areas. | ||
| • | Sample sites were planned on a square 1km x 1km grid, and then located with GPS | |
| receiver. | ||
| • | The regolith landform setting was recorded. The proportions of the main lag types, Eg. | |
| highly ferruginous (including magnetic and non-magnetic); ferruginised lithic; lithic; | ||
| quartz; calcrete; other, and grain size were recorded. | ||
| • | Lag was swept up with a plastic dust pan and brush over about a 5 m diameter area. (for | |
| ~ 2 kg sample). Coarse pebbles, sticks, etc (greater than 1 or 2 cm) were swept out on | ||
| to a plastic sheet and any organic material was removed. Two magnetic susceptibility | ||
| readings were recorded. A hand held magnet inside a plastic bag was used to collect the | ||
| magnetic fraction (between 50-100gms). | ||
| • | Samples were submitted to Ultra Trace Pty Ltd of Canning Vale, W.A. and after sorting | |
| and drying, samples were pulverized and then exposed to concentrated hydrochloric | ||
| acid to extract moderately bound elements (partial extraction methodology) and | ||
| analysed for a limited range of elements by ICPMS and ICPOES methods. (Au, Ag, As, | ||
| Pt, Ta, Ba, Cr, Cu, Fe, Zn, Hg). | ||
| • | In 2007, Murchison Exploration Pty Ltd was acquired by Revere Mining Ltd, now called | |
| Enterprise Metals Ltd (“Enterprise”). | ||
| • | Revere (Enterprise) flew a detailed low level 100m line spaced airborne magnetic and | |
| radiometric survey over the majority of the project area. | ||
| • | In 2008, Enterprise retrieved the available maglag sample pulps from storage and | |
| submitted them to Actlabs Pacific Pty Ltd, Redcliffe W.A. for analysis of an expanded | ||
| suite of 61 elements. Samples were pulverized prior to a total digest (four-acid) and | ||
| determination of the elements listed below using ICP-MS and ICP-OES methods. | ||
| Analysed elements were: Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, | ||
| Fe, Ga, Gd, Ge, Hf, Hg, Ho, In, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Pd, Pr, | ||
| Pt, Rb, Re, S, Sb, Sc, Se, Sm, Sn, Sr, Ta, Tb, Te, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn, Zr. | ||
| • | Between 2009 and 2012, the Company’s exploration focus was for VMS style massive | |
| sulphide deposits in the Narracoota Fm volcanic sequence. | ||
| • | During 2012, the Company commenced a program to test the potential of the Yerrida | |
| Basin sediments for sediment hosted (SEDEX style) copper deposits. | ||
| • | In late 2012, the CSIRO flew a SPECTREM airborne EM survey at 5km line spacing in a | |
| south-south direction over the Doolgunna area, and generated a series of anomalies | ||
| rated on a four part scale from A to D with A being ‘excellent’ and D being ‘poor’. From | ||
| this data, Enterprise selected six “A” rated EM anomalies along the SBF for follow up | ||
| and ground EM surveying. | ||
| • | The strongly conducting nature of the AEM anomalies suggested that they were either | |
| massive sulphide or highly graphitic bodies. Considering the anomalies are hosted in a | ||
| sedimentary package, and the proximity to Sipa’s Enigma copper deposit and Ventnor’s | ||
| Thaduna and Green Dragon Copper deposits, Enterprise considered that this area and | ||
| these AEM targets had thepotential for SEDEX style copper deposits. |
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
Page | 19
ASX Release 8 July 2014
ENTERPRISE METALS LIMITED
| Criteria | Commentary | Commentary |
|---|---|---|
| • | In mid-2013, the Company conducted ground EM (GEM) surveys to follow up the | |
| SPECTREM EM anomalies. Two high priority bedrock conductors (A & B) were seen to | ||
| be adjacent to maglag samples considered to be anomalous in W, Sn, Mo, Bi, Sb & Te. | ||
| Geology | • | The Company considers the Yerrida Basin sediments to be prospective for sediment |
| hosted (SEDEX style) copper deposits similar to those in the Central African Copperbelt. | ||
| • | The Southern Boundary Fault (SBF) and associated cross structures are potential | |
| conduits for mineralising fluids into the sediments of the “Doolgunna Graben”. The | ||
| Yerrida Basin sediments are also host to the Thaduna massive sulphide copper deposit | ||
| and Sipa Resources’ Enigma Deposit to the northeast along strike of the SBF. | ||
| • | Enterprise believes the “aeromagnetic redox feature” along the Southern Boundary Fault | |
| is a fluid outflow zone, so any ore would be (stratigraphically) below this zone, and | ||
| probably in a trap site away from the immediate outflow zone. The target stratigraphy is | ||
| more or less conformable reduced facies strata, and could be shales, carbonates and/or | ||
| conglomerates. | ||
| • | Along the Southern Boundary Fault, within the Moolgoolool Group sediments, there are | |
| areas of intense magnetism (probably magnetite but possibly pyrrhotite) broken by areas | ||
| of magnetic lows which may represent total magnetite destruction. The magnetite | ||
| destruction is potentially the result of outflow of reducing fluids, including copper. | ||
| • | Although the area is covered by regolith, it is expected that the potentially mineralised | |
| zones would manifest themselves as electromagnetic conductors and/or gravity | ||
| anomalies. | ||
| Drill hole | • | Refer to attached Table of all RC drill collars. |
| Information | ||
| Data | • | All reported composite intervals of assay results are weighted by length. Reported |
| aggregation methods |
• | intervals selected on + 100ppm Pb, or +100ppm Zn or +100ppm Cu or +4ppm Te. No cutting of grades was required as grades were determined to be generally uniform. |
| • | Not applicable, as no metal equivalents used. | |
| Relationship | • | Nature of mineralization with respect to drill hole angle is not known. |
| between mineralisation |
• |
Only down hole lengths are reported as true width of mineralized intervals is not known. |
| widths and | ||
| intercept | ||
| lengths | ||
| Diagrams | • | Plans of drill collar location in ENT:ASX release 17 April 2014. |
| • | Schematic cross section produced for Borg Prospect 7 July 2014. | |
| Balanced | • | Anomalous intervals +100ppm Pb, or +100ppm Zn or +100ppm Cu or +4ppm Te |
| reporting | reported. | |
| • | No oregrades were intersected. | |
| Other | • | No other substantive exploration data acquired from RC drill program. |
| substantive | ||
| exploration | ||
| data | ||
| Further work | • | Ground geophysics and RC drilling |
Tel: (+61 8) 9436 9200 Fax: (+61 8) 9436 9220 Email: [email protected]
Level 1, 640 Murray Street, West Perth, WA 6005 PO Box 992, West Perth, WA 6872 www.enterprisemetals.com.au
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