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ENCOUNTER RESOURCES LIMITED — Regulatory Filings 2017
Feb 13, 2017
64856_rns_2017-02-13_3e7bc08e-d631-4d13-b543-c11f6eb3098f.pdf
Regulatory Filings
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Level 7, 600 Murray Street West Perth WA 6005
PO Box 273 West Perth WA 6872
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P 08 9486 9455 F 08 6210 1578
www.enrl.com.au
ASX : ENR
14 February 2017
Company Announcements Office Australian Securities Exchange 4th Floor, 20 Bridge Street Sydney NSW 2000
Reef St le Gold at East Thomson’s Dome y
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East Thomson’s Dome is located 5km north of Telfer and hosts prospective stratigraphy similar to the host units at Telfer
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Historical shallow exploration in the 1990s discovered an area of near surface high grade gold at the Fold Closure prospect including intersections:
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4m @ 29 g/t Au from 31m in NTR 5
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2m @ 33 g/t Au from 22m in NTR 12
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10m @ 9.8 g/t from 16m in NTR 17 incl. 2m @ 45.8 g/t Au from 20m
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2m @ 76.2 g/t Au from 35m in NTR 57
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7m @ 17.1 g/t Au from 16m in NTR 61 incl. 3m @ 37.6 g/t Au from 19m
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This area of high grade reef style gold remains open down dip and along strike
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The most recent exploration at East Thomson’s was conducted by Barrick in 2005 when two 1000m deep diamond holes were completed. Barrick’s DDH at the Fold Closure intersected 3m @ 8.2g/t Au from 243m and remains open in all directions
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RC drill program at East Thomson’s to commence in April-May 2017 immediately following the next phase of drilling at Telfer West
The directors of Encounter Resources Ltd (“ Encounter ” or “ the Company ”) are pleased to report that its ongoing review of historical exploration data from the recently acquired East Thomson’s Dome project (“East Thomson’s”) has identified the presence of high grade, near surface gold mineralisation at the Fold Closure prospect. East Thomson’s is a high quality exploration opportunity located just 5km from the major gold-copper mine at Telfer (Figure 1).
Background
The domal structure at East Thomson’s has a core of Telfer Formation sediments with the fold axis trending WNW. This geological setting is similar to the setting of the high grade reefs at Telfer.
Historical exploration at East Thomson’s was conducted by Newmont, Duval Mining and Mt Burgess Mining NL between 1985 and 2003. The most recent exploration was completed by Barrick Gold Corporation (“ Barrick ”) in 2003-2006. Previous drilling completed at East Thomson’s was mainly shallow RAB and RC programmes with only 3 diamond holes drilled across the 4km by 4km project. In total, 438 holes have been drilled at East Thomson’s with only 10 of these holes exceeding 100m depth and the remainder of the holes averaging 28m depth.
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Figure 1: Telfer Region Gold Projects. Interpreted mineralised domes and location map – Bing background
Historical Exploration Results
The review of historical exploration data is continuing. Early results from this review have identified areas that warrant immediate follow up exploration. Historical shallow exploration in the 1990s at the Fold Closure prospect discovered an area of near surface high grade gold that outcrops on the fold axis of the East Thomson’s Dome. The Fold Closure prospect is an area 600m by 500m located in the centre of the East Thomson’s project (see Figures 1 and 2).
The Fold Closure prospect has high grade reef style gold mineralisation that has been drilled to a depth of approximately 50m and remains open down dip and along strike. A total of 107 holes have been drilled in and around the Fold Closure prospect with only 2 of these holes being diamond holes and only 6 holes in total exceeding 100m downhole depth (see Figure 4). The average depth of the drilling at the Fold Closure, excluding the 6 deepest holes, is 34m.
The most recent drilling at East Thomson’s was conducted by Barrick in 2005 when two ~1000m deep diamond holes were completed with both holes returning encouraging intersections. Barrick’s DDH at the Fold Closure returned 3m @ 8.2 g/t Au from 243m in a quartz reef similar to the host of the gold mineralisation near surface. This intersection sits to the northwest of the high grade near surface gold and remains open in all directions (see Figure 2).
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Figure 2: Fold Closure Prospect (East Thomson’s Dome): Maximum gold in hole plot on surface geology (darker green = outcropping sediments, lighter green = sediment float)
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Figure 3: Cross section A-A’ high grade area, Fold Closure Prospect (Horizontal: Vertical scale = 1:1)
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Figure 4: Drill collar file - Fold Closure region. Holes coloured by depth of hole
Upcoming Exploration
East Thomson’s high grade, quartz reef mineralisation is similar to the upper reefs at Telfer. Given this context, the limited depth extend of previous exploration and location of the gold opportunity, follow up exploration is planned to commence as soon as possible.
Upcoming exploration will focus on finding extensions to the high grade reef style mineralisation at the Fold Closure and to assess how these near surface mineralised reefs fit into a potential larger mineral system. This program will involve a series of RC drill traverses and some diamond drilling from surface to orientate the mineralised reefs.
A second focus will be to follow up the diamond hole drilled by Barrick that contained an intersection of 3m @ 8.2g/t gold from 243m. Drilling will seek to establish continuity of this quartz lode and will endeavour to identify the relationship between the quartz reef intersected in this drill hole and the high grade near surface reefs.
Future exploration will also focus on the broader domal structure at East Thomson’s where the fold nose of the dome of prospective stratigraphy extends under cover and is largely untested. Exploration at East Thomson’s will also assess the potential for stockwork style mineralisation at depth.
Exploration at East Thomson’s is planned to commence in April-May following the summer cyclone period and will follow the planned drilling program at Telfer West.
| Hole_ID | **Hole Type ** | Northing (m) |
Easting (m) | RL(m) | EOH(m) | Dip | Azi | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| BETRC0003 | RC | 7607581 | 414224 | 290 | 59 | -90 | 0 | ||||
| BTRCD0003 | RCD | 7607896 | 414187 | 290 | 1041.3 | -66 | 192 | ||||
| CTH107 | RAB | 7607709 | 414058 | 301 | 25 | -90 | 0 | ||||
| CTH108 | RAB | 7607726 | 414078 | 301 | 25 | -90 | 0 | ||||
| CTH109 | RAB | 7607742 | 414097 | 301 | 25 | -90 | 0 | ||||
| CTH110 | RAB | 7607758 | 414117 | 301 | 20 | -90 | 0 | ||||
| CTH111 | RAB | 7607775 | 414137 | 301 | 20 | -90 | 0 | ||||
| CTH112 | RAB | 7607791 | 414158 | 303 | 25 | -90 | 0 | ||||
| CTH113 | RAB | 7607807 | 414178 | 303 | 25 | -90 | 0 | ||||
| CTH114 | RAB | 7607824 | 414197 | 303 | 25 | -90 | 0 | ||||
| CTH115 | RAB | 7607840 | 414217 | 303 | 25 | -90 | 0 | ||||
| CTH116 | RAB | 7607856 | 414237 | 303 | 25 | -90 | 0 | ||||
| CTH117 | RAB | 7607873 | 414256 | 303 | 25 | -90 | 0 | ||||
| CTH118 | RAB | 7607889 | 414276 | 304 | 25 | -90 | 0 | ||||
| CTH119 | RAB | 7607905 | 414296 | 304 | 25 | -90 | 0 | ||||
| CTH178 | RAB | 7607655 | 413931 | 297 | 25 | -90 | 0 | ||||
| CTH179 | RAB | 7607618 | 413964 | 299 | 25 | -90 | 0 | ||||
| CTH180 | RAB | 7607581 | 413998 | 299 | 25 | -90 | 0 | ||||
| CTH181 | RAB | 7607545 | 414032 | 299 | 25 | -90 | 0 | ||||
| CTH182 | RAB | 7607508 | 414066 | 301 | 25 | -90 | 0 | ||||
| CTH66 | RAB | 7607368 | 414014 | 299 | 25 | -90 | 0 | ||||
| CTH67 | RAB | 7607365 | 414040 | 299 | 25 | -90 | 0 | ||||
| CTH68 | RAB | 7607362 | 414065 | 301 | 25 | -90 | 0 | ||||
| CTH69 | RAB | 7607359 | 414091 | 301 | 25 | -90 | 0 | ||||
| CTH70 | RAB | 7607356 | 414115 | 301 | 25 | -90 | 0 | ||||
| CTH71 | RAB | 7607352 | 414140 | 301 | 25 | -90 | 0 | ||||
| CTH72 | RAB | 7607349 | 414166 | 304 | 25 | -90 | 0 | ||||
| CTH73 | RAB | 7607346 | 414191 | 304 | 25 | -90 | 0 | ||||
| CTH74 | RAB | 7607343 | 414217 | 304 | 25 | -90 | 0 | ||||
| CTH75 | RAB | 7607340 | 414241 | 304 | 25 | -90 | 0 | ||||
| CTH76 | RAB | 7607337 | 414266 | 306 | 25 | -90 | 0 | ||||
| CTH77 | RAB | 7607333 | 414292 | 306 | 25 | -90 | 0 | ||||
| CTH78 | RAB | 7607330 | 414317 | 306 | 25 | -90 | 0 | ||||
| CTH79 | RAB | 7607327 | 414343 | 306 | 25 | -90 | 0 | ||||
| CTH80 | RAB | 7607324 | 414368 | 308 | 11 | -90 | 0 | ||||
| CTH81 | RAB | 7607321 | 414392 | 308 | 25 | -90 | 0 | ||||
| CTH82 | RAB | 7607462 | 414072 | 301 | 25 | -90 | 0 | ||||
| CTH83 | RAB | 7607416 | 414072 | 301 | 25 | -90 | 0 | ||||
| CTH84 | RAB | 7607370 | 414072 | 301 | 25 | -90 | 0 | ||||
| CTH85 | RAB | 7607323 | 414073 | 301 | 25 | -90 | 0 |
| CTH86 | RAB | 7607277 | 414073 | 301 | 25 | -90 | 0 | ||
|---|---|---|---|---|---|---|---|---|---|
| CTH87 | RAB | 7607230 | 414073 | 301 | 25 | -90 | 0 | ||
| CTH88 | RAB | 7607184 | 414072 | 302 | 25 | -90 | 0 | ||
| CTH89 | RAB | 7607138 | 414072 | 302 | 25 | -90 | 0 | ||
| CTH90 | RAB | 7607091 | 414073 | 302 | 25 | -90 | 0 | ||
| CTH91 | RAB | 7607045 | 414073 | 302 | 25 | -90 | 0 | ||
| ET13 | RAB | 7607151 | 414498 | 311 | 41 | -60 | 11.4 | ||
| ETRC012 | RC | 7607605 | 414155 | 301 | 50 | -60 | 121.4 | ||
| ETRC013 | RC | 7607624 | 414163 | 303 | 50 | -60 | 121.4 | ||
| ETRC014 | RC | 7607643 | 414173 | 303 | 50 | -60 | 121.4 | ||
| ETRC015 | RC | 7607657 | 414180 | 303 | 50 | -60 | 121.4 | ||
| ETRC016 | RC | 7607548 | 414134 | 301 | 30 | -60 | 121.4 | ||
| ETRC017 | RC | 7607558 | 414115 | 301 | 60 | -60 | 121.4 | ||
| ETRC018 | RC | 7607539 | 414094 | 301 | 60 | -60 | 121.4 | ||
| ETRC019 | RC | 7607490 | 414051 | 299 | 40 | -60 | 121.4 | ||
| NTR12 | RC | 7607508 | 414116 | 301 | 41 | -60 | 316 | ||
| NTR13 | RC | 7607499 | 414101 | 301 | 39 | -60 | 317 | ||
| NTR14 | RC | 7607489 | 414090 | 301 | 45 | -90 | 0 | ||
| NTR15 | RC | 7607478 | 414080 | 301 | 39 | -60 | 319 | ||
| NTR16 | RC | 7607469 | 414068 | 301 | 39 | -60 | 314 | ||
| NTR17 | RC | 7607516 | 414125 | 301 | 39 | -60 | 313 | ||
| NTR18 | RC | 7607524 | 414139 | 301 | 39 | -60 | 320 | ||
| NTR19 | RC | 7607539 | 414146 | 301 | 39 | -60 | 319 | ||
| NTR2 | RC | 7607341 | 414016 | 299 | 78 | -90 | 0 | ||
| NTR20 | RC | 7607556 | 414161 | 303 | 39 | -60 | 312 | ||
| NTR21 | RC | 7607422 | 414127 | 301 | 39 | -90 | 0 | ||
| NTR22 | RC | 7607444 | 414148 | 301 | 33 | -90 | 0 | ||
| NTR23 | RC | 7607415 | 414113 | 301 | 33 | -90 | 0 | ||
| NTR24 | RC | 7607454 | 414126 | 301 | 33 | -90 | 0 | ||
| NTR25 | RC | 7607574 | 414025 | 299 | 27 | -90 | 0 | ||
| NTR27 | RC | 7607651 | 414111 | 301 | 33 | -90 | 0 | ||
| NTR28 | RC | 7607682 | 414106 | 301 | 33 | -90 | 0 | ||
| NTR29 | RC | 7607689 | 414132 | 301 | 33 | -90 | 0 | ||
| NTR3 | RC | 7607497 | 414125 | 301 | 126 | -60 | 314 | ||
| NTR30 | RC | 7607665 | 414157 | 303 | 33 | -90 | 0 | ||
| NTR4 | RC | 7607589 | 414180 | 303 | 90 | -60 | 328 | ||
| NTR5 | RC | 7607526 | 414094 | 301 | 42 | -60 | 134 | ||
| NTR53 | RC | 7607473 | 414103 | 301 | 81 | -60 | 314 | ||
| NTR54 | RC | 7607509 | 414149 | 301 | 75 | -60 | 320 | ||
| NTR55 | RC | 7607407 | 414140 | 301 | 75 | -90 | 0 | ||
| NTR56 | RC | 7607510 | 414108 | 301 | 20 | -90 | 0 | ||
| NTR57 | RC | 7607503 | 414118 | 301 | 45 | -90 | 0 | ||
| NTR58 | RC | 7607506 | 414103 | 301 | 20 | -90 | 0 | ||
| NTR59 | RC | 7607502 | 414107 | 301 | 35 | -60 | 315 | ||
| NTR6 | RC | 7607594 | 414143 | 301 | 150 | -90 | 0 | ||
| NTR60 | RC | 7607515 | 414116 | 301 | 20 | -60 | 315 | ||
| NTR61 | RC | 7607510 | 414120 | 301 | 28 | -60 | 315 | ||
| NTR62 | RC | 7607506 | 414124 | 301 | 43 | -60 | 315 | ||
| NTR63 | RC | 7607519 | 414132 | 301 | 30 | -60 | 315 | ||
| NTR64 | RC | 7607515 | 414137 | 301 | 40 | -60 | 315 | ||
| NTR7 | RC | 7607946 | 414291 | 304 | 64 | -90 | 0 | ||
| NTR8 | RC | 7607303 | 414059 | 301 | 66 | -90 | 0 | ||
| NTR9 | RC | 7607076 | 414023 | 299 | 90 | -90 | 0 | ||
| TH1 | RAB | 7607572 | 414108 | 301 | 25 | -90 | 0 | ||
| TH10 | RAB | 7607558 | 414293 | 305 | 25 | -90 | 0 | ||
| TH2 | RAB | 7607571 | 414129 | 301 | 25 | -90 | 0 | ||
| TH3 | RAB | 7607569 | 414149 | 301 | 25 | -90 | 0 | ||
| TH4 | RAB | 7607568 | 414170 | 303 | 25 | -90 | 0 | ||
| TH5 | RAB | 7607566 | 414190 | 303 | 25 | -90 | 0 | ||
| TH6 | RAB | 7607564 | 414211 | 303 | 25 | -90 | 0 | ||
| TH7 | RAB | 7607563 | 414231 | 303 | 25 | -90 | 0 | ||
| TH8 | RAB | 7607561 | 414252 | 303 | 25 | -90 | 0 | ||
| TH9 | RAB | 7607560 | 414272 | 305 | 25 | -90 | 0 | ||
| YAC2034 | AC | 7607939 | 414354 | 304 | 6 | -90 | 0 | ||
| YDD002 | DD | 7607499 | 414240 | 303 | 403 | -60 | 270 | ||
| YRC005 | RC | 7607561 | 414398 | 307 | 160 | -60 | 262 | ||
| YRC006 | RC | 7607933 | 414252 | 302 | 144 | -60 | 224 |
Table 1: Historical drill hole collar locations – Fold Closure Prospect (East Thomson’s Dome) Estimated drill hole coordinates GDA94 zone 51 datum. Collars positions are estimated from conversion of historical drill hole database. EOH = End of hole depth; m=metre; azi=azimuth. DD = Diamond drillhole, RCD = RC precollar with diamond tail, RC = Reverse circulation hole, RAB = Rotary Air Blast hole, AC = Aircore hole
| Hole ID | From (m) | To (m) | Length | Gold (ppb) | Arsenic | Bismuth | Copper (ppm) | ||
|---|---|---|---|---|---|---|---|---|---|
| (m) | (ppm) | (ppm) | |||||||
| BTRCD0003 | 183 | 186 | 3 | 563 | 19 | 1 | 427 | ||
| and | 243 | 246 | 3 | 8237 | 15 | 77 | 641 | ||
| incl | 243 | 245 | 2 | 11775 | 17 | 106 | 742 | ||
| and | 831 | 833 | 2 | 2040 | ltd | 1 | 127 | ||
| CTH119 | 12 | 14 | 2 | 630 | 7 | - | 194 | ||
| CTH66* | 22 | 25 | 3 | 4933 | 10 | - | 457 | ||
| incl | 22 | 24 | 2 | 6770 | 14 | - | 495 | ||
| CTH67 | 22 | 24 | 2 | 540 | 3 | - | 386 | ||
| ETRC019 | 8 | 10 | 2 | 1340 | 1 | - | 212 | ||
| NTR12 | 20 | 26 | 6 | 11503 | 130 | - | 547 | ||
| incl | 22 | 24 | 2 | 33000 | 350 | - | 890 | ||
| NTR13 | 10 | 14 | 4 | 560 | ltd | - | 265 | ||
| NTR14 | 42 | 44 | 2 | 1110 | ltd | - | 480 | ||
| NTR17 | 16 | 26 | 10 | 9854 | 58 | - | 609 | ||
| incl | 20 | 22 | 2 | 45800 | 250 | - | 1450 | ||
| NTR18 | 12 | 14 | 2 | 700 | ltd | - | 315 | ||
| and | 22 | 24 | 2 | 550 | 10 | - | 790 | ||
| CTH87 | 18 | 20 | 2 | 670 | 8 | - | 314 | ||
| NTR22 | 26 | 28 | 2 | 970 | ltd | - | 410 | ||
| NTR27 | 26 | 28 | 2 | 700 | ltd | - | 510 | ||
| NTR28 | 16 | 18 | 2 | 630 | ltd | - | 280 | ||
| NTR3 | 27 | 29 | 2 | 990 | ltd | - | 220 | ||
| and | 59 | 61 | 2 | 680 | ltd | - | 1300 | ||
| NTR30 | 28 | 30 | 2 | 620 | ltd | - | 570 | ||
| NTR5 | 31 | 37 | 6 | 19583 | 500 | - | 1150 | ||
| incl | 31 | 35 | 4 | 28970 | 640 | - | 1315 | ||
| NTR53 | 58 | 64 | 6 | 3067 | 113 | - | 1257 | ||
| incl | 58 | 60 | 2 | 6300 | 200 | - | 835 | ||
| NTR54 | 4 | 6 | 2 | 620 | ltd | - | 320 | ||
| NTR55 | 22 | 24 | 2 | 850 | ltd | - | 300 | ||
| and | 30 | 32 | 2 | 550 | 10 | - | 450 | ||
| and | 40 | 42 | 2 | 1080 | 10 | - | 630 | ||
| NTR56 | 9 | 12 | 3 | 2577 | 33 | - | - | ||
| incl | 11 | 12 | 1 | 6200 | 100 | - | - | ||
| NTR57 | 35 | 38 | 3 | 51123 | 800 | - | - | ||
| incl | 35 | 37 | 2 | 76250 | 1200 | - | - | ||
| NTR58 | 8 | 12 | 4 | 668 | ltd | - | - | ||
| NTR59 | 16 | 22 | 6 | 613 | ltd | - | - | ||
| NTR6 | 48 | 50 | 2 | 650 | ltd | - | 390 | ||
| NTR60 | 8 | 14 | 6 | 918 | 1 | - | - | ||
| NTR61 | 16 | 23 | 7 | 17131 | 17 | - | - | ||
| incl | 19 | 22 | 3 | 37527 | 40 | - | - | ||
| NTR62 | 20 | 28 | 8 | 3910 | 25 | - | - | ||
| incl | 20 | 24 | 4 | 6910 | 50 | - | - | ||
| NTR63 | 20 | 24 | 4 | 5320 | 107 | - | - |
| incl | 20 | 21 | 1 | 18100 | 400 | - | - | ||
|---|---|---|---|---|---|---|---|---|---|
| NTR64 | 35 | 38 | 3 | 547 | ltd | - | - | ||
| NTR8 | 58 | 60 | 2 | 1560 | 20 | - | 460 | ||
| NTR9 | 48 | 52 | 4 | 505 | ltd | - | 345 | ||
| TH5 | 4 | 6 | 2 | 840 | 36 | - | 635 | ||
| and | 10 | 12 | 2 | 580 | 39 | - | 280 | ||
| and | 22 | 25 | 2 | 1055 | 17 | - | 313 | ||
| TH6 | 2 | 4 | 2 | 600 | 400 | - | 555 | ||
| and | 14 | 22 | 8 | 775 | 49 | - | 693 | ||
| TH7 | 8 | 10 | 2 | 1080 | 1900 | - | 660 | ||
| YDD002 | 24 | 28 | 4 | 1798 | 12 | ltd | 288 | ||
| incl | 27 | 28 | 1 | 6390 | 43 | - | 619 | ||
| and | 48 | 50 | 2 | 500 | 7 | ltd | 501 | ||
| and | 170 | 174 | 4 | 540 | 26 | 5 | 600 |
Table 2: Historical drilling assay results – Fold Closure (East Thomson’s Dome) Intervals are calculated at a +0.5 g/t Au lower cut-off and in excess of 1gm. Some internal lower grade (<0.5g/t Au) intervals are included in the composite calculations. Internal higher grade intervals calculated at a 5g/t Au lower cut-off. All arsenic, bismuth and copper intervals are included (- represent not analysed) ltd = less than detection * = end of hole interval
Location Plan
Encounter holds exploration tenure over 2,000km² of the Paterson Province in Western Australia, with the main Yeneena project located 35km SE of the Nifty copper mine and 40km SW of the Telfer gold/copper deposit (Figure 5). The targets identified in the Paterson are located adjacent to major regional faults and have been identified through electromagnetics, geochemistry and structural targeting. The company is actively exploring for copper-cobalt and zinc-lead deposits at the Yeneena as well as gold-copper deposits in the Telfer region.
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Figure 5: Yeneena region leasing and targets areas
The information in this report that relates to Exploration Results is based on information compiled by Mr. Peter Bewick who is a Member of the Australasian Institute of Mining and Metallurgy. Mr. Bewick holds shares and options in and is a full time employee of Encounter Resources Ltd and has sufficient experience which is relevant to the style of mineralisation under consideration to qualify as a Competent Person as defined in the 2012 Edition of the 'Australian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves'. Mr Bewick consents to the inclusion in the report of the matters based on the information compiled by him, in the form and context in which it appears.
The Company confirms that it is not aware of any new information or data that materially affects the information in the relevant ASX releases and the form and context of the announcement has not materially changed.
SECTION 1 SAMPLING TECHNIQUES AND DATA
| SECTION 1 SAMPLING TECHNIQUES AND DATA | |
|---|---|
| Criteria | JORC Code explanation Commentary |
| Sampling techniques |
Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. Drilling at the Fold Closure prospect at East Thomson’s Dome was sampled by Duval Mining, Cove Mining, Newmont Australia Ltd and Barrick. The drilling was completed over a number of campaign between 1985 and 2005. In total, 107 holes were drilled at the Fold Closure for a total of 5444.3m. The majority of drill holes were sampled in their entirety with half core taken from diamond holes and +1kg splits of RAB, RC and aircore holes used for analysis. |
| Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used The historical drilling information for the project was compiled by Barrick in 2004. Where possible Encounter staff, using a handheld GPS, have located hole collars with an estimated accuracy of +/- 5m. Where collars could not be found the information from the Barrick database was simply converted from AMG to MGA coordinates. Hole accuracy in the historic database is expected to be in the order of +/- 5m. |
|
| Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard’ work has been done this would be relatively simple (e.g. ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information The diamond core was drilled at either HQ or NQ diameter with samples submitted as half core samples. RAB, RC and aircore drilling submitted a +1kg sample for analysis. Information on the sample analysis and preparation was not found in the historic reports. |
|
| Drilling techniques | Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (e.g. core diameter, triple or standard tube, depth of diamond tails, face- sampling bit or other type, whether core is oriented and if so, by what method, etc). Diamond holes were either HQ or NQ sized holes. No comments were made in the historic reports detailing the hammer or bit size used in the RAB, RC and aircore drilling. |
| Drill sample recovery |
Method of recording and assessing core and chip sample recoveries and results assessed This information was not found in the historic reports. |
| Measures taken to maximise sample recovery and ensure representative nature of the samples Unable to determine from historical reports. |
|
| Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fine/coarse material. To date, no detailed analysis to determine the relationship between sample recovery and/or and grade has been undertaken for this drill project. |
| Criteria | JORC Code explanation Commentary |
|---|---|
| Logging | Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. Geological logging was carried out on drill holes by various company and contract geologist over the past 30 years. The majority of holes note lithology and sulphide abundance. Based on the information available in the historical reports only the diamond holes drilled by Barrick were orientated. |
| Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. Geological logging is qualitative in nature and records interpreted lithology, alteration, mineralisation, structure, veining and other features of the samples. |
|
| The total length and percentage of the relevant intersections logged All historic drill holes were logged in full. |
|
| Sub-sampling techniques and sample preparation |
If core, whether cut or sawn and whether quarter, half or all core taken. The core samples reported in this announcement were half cut core. |
| If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. Unable to determine from historical reports. |
|
| For all sample types, the nature, quality and appropriateness of the sample preparation technique. Unable to verify from historical geological reports. |
|
| Quality control procedures adopted for all sub- sampling stages to maximise representivity of samples. Unable to determine from historical reports. |
|
| Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling. Unable to determine from historical reports. |
|
| Whether sample sizes are appropriate to the grain size of the material being sampled. The sample sizes are considered appropriate to give an indication of the gold and base metal anomalism and mineralisation at East Thomson’s Dome. |
|
| Quality of assay data and laboratory tests |
The nature, quality and appropriateness of the assaying and laboratory procedures used and whether the technique is considered partial or total. No information is available in the historic reports on the nature of the assaying completed. |
| For geophysical tools, spectrometers, handheld XRF instruments, etc, the parameters used in determining the analysis including instrument make and model, reading times, calibrations factors applied and their derivation, etc. No Geophysical tools used |
|
| Nature of quality control procedures adopted (e.g. standards, blanks, duplicates, external laboratory checks) and whether acceptable levels of accuracy (i.e. lack of bias) and precision have been established. No information is available in the historic reports on laboratory QAQC procedures. |
| Criteria | JORC Code explanation Commentary |
|---|---|
| Verification of sampling and assaying |
The verification of significant intersections by either independent or alternative company personnel. The intersections included in this report have been verified by Kristian Hendricksen (Senior Geologist) |
| The use of twinned holes. No twinned holes have been drilled. |
|
| Documentation of primary data, data entry procedures, data verification, data storage (physical and electronic) protocols. Primary data for the diamond drilling at the East Thomson’s Dome project was collected from historical WAMEX reports by Barrick. |
|
| Discuss any adjustment to assay data. No adjustments or calibrations are made to any assay data from East Thomson’s Dome. |
|
| Location of data points | Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. Historic drill hole collar locations (where located) were verified by Encounter personnel using a handheld GPS(+/-5m). Where collars could not be located the hole location was converted directly from the Barrick Database (+/-5m) Down hole surveys were reported as being collected during this drilling program at approx. 100m intervals downhole but no information relating to the downhole surveys can be found in the historical reports. |
| Specification of the grid system used. The grid system used is MGA_GDA94, zone 51. |
|
| Quality and adequacy of topographic control. Estimated RLs were assigned using a handheld GPS. |
|
| Data spacing and distribution | Data spacing for reporting of Exploration Results. The drilling at the prospect is not systematic and is shallow in nature. Estimated collar locations and hole depths for all 107 holes discussed in this announcement are shown in TABLE 1 of the main report. |
| Whether the data spacing and distribution is sufficient to establish the degree of geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications applied. Mineralisation has not yet demonstrated to be sufficient in both geological and grade continuity appropriate for the Mineral Resource and Ore Reserve estimation procedure(s) and classifications to be applied. |
|
| Whether sample compositing has been applied. Adjacent drill samples in excess of 0.5g/t gold and total in excess of 1gm have been composited with samples in excess of 5g/t gold shown individually in TABLE 2 of the main report. |
|
| Orientation of data in relation to geological structure |
Whether the orientation of sampling achieves unbiased sampling of possible structures and the extent to which this is known, considering the deposit type. N/A – this is early stage drilling and the orientation of sampling to the mineralisation is not known. |
| If the relationship between the drilling orientation and the orientation of key mineralised structures is considered to have introduced a sampling bias, this should be assessed and reported if material. This is early stage drilling and the orientation of sampling to the mineralisation is not known. |
|
| Sample security | The measures taken to ensure sample security. The chain of custody of the samples taken was not detailed in the historic report. |
| Audits or reviews | The results of any audits or reviews of sampling techniques and data. No QAQC or sample audit information was not found in the historic WAMEX reports. |
| SECTION 2 REPORTING OF EXPLORATION RESULTS | SECTION 2 REPORTING OF EXPLORATION RESULTS | SECTION 2 REPORTING OF EXPLORATION RESULTS | |
|---|---|---|---|
| Criteria | JORC | Code explanation | Commentary |
| Mineral tenement and | The East Thomson’s Dome project is located | ||
| land tenure status | within the tenements E45/3446, P45/2750-2 which | ||
| is 100% held by Hamelin Resources Pty Ltd, a | |||
| Type, reference name/number, location and | 100% owned subsidiary of Encounter. | ||
| ownership including agreements or material | |||
| issues with third parties including joint | These tenements are contained completely within | ||
| ventures, partnerships, overriding royalties, | land where the Martu People have been | ||
| native | title interests, historical sites, wilderness | determined to hold native title rights. | |
| or national park and environmental settings. | |||
| No historical or environmentally sensitive sites | |||
| have been identified in the area of work. | |||
| Exploration done by | The East Thomson’s Dome Area has been | ||
| other parties | exposed to more than 30 years of gold and base | ||
| metal exploration since the early 1970’s. | |||
| Companies that have previously held the ground | |||
| or been involved in joint ventures include | |||
| Newmont Australia Ltd, Newcrest Mining Ltd, | |||
| Duval Mining Australia Ltd, Geopeko Ltd, | |||
| Marathon Petroleum Pty Ltd, Western Mining | |||
| Corporation, MIM Exploration Pty Ltd, | |||
| Acknowledgment and appraisal of exploration by other parties. |
Mount Burgess Mining NL, BHP Minerals Pty Ltd, Cove Mining NL and various other smaller companies and individuals. |
||
| Previous exploration activities have included, | |||
| geochemical lag and soil sampling, geological | |||
| mapping, photo-lithological interpretations, rock | |||
| chip sampling, RAB drilling, RC drilling, diamond | |||
| core drilling, PIMA studies, and geophysical | |||
| surveys (IP surveys, EM surveys and | |||
| aeromagnetic surveys). | |||
| Geology | The East Thomson’s Dome project is situated in | ||
| the Proterozoic Paterson Province of Western | |||
| Australia. A simplified geological interpretation | |||
| shows a domal feature with Malu Formation in the | |||
| Deposit type, geological setting and style of mineralisation |
core of the fold being overlain by the Telfer Formation forming the uppermost unit. |
||
| East Thomson’s Dome project is considered | |||
| prospective for sediment – hosted ‘Telfer style’ | |||
| gold-copper mineralisation. | |||
| Drill hole information | A summary of all information material to the | ||
| understanding of the exploration results | |||
| including tabulation of the following information | |||
| for all Material drill holes: | |||
| • | Easting and northing of the drill hole | ||
| collar | |||
| • • |
Elevation or RL (Reduced Level – elevation above sea level in meters) of the drill hole collar Dip and azimuth of the hole |
Refer to Table 1 in the body of this announcement for the details of the diamond holes drilled at the project. |
|
| • | Down hole length and interception | ||
| depth | |||
| • | Hole length |
| Data aggregation methods |
In reporting Exploration Results, weighting averaging techniques, maximum and/or minimum grade truncations (e.g. cutting of high grades) and cut-off grades are usually Material and should be stated. All reported assays have been length weighted, with a nominal 0.5g/t gold lower cut-off with a minimum of 1gm reported as significant in the context of the geological setting. No upper cuts- offs have been applied. Where aggregated intercepts incorporate short lengths of high grade results and longer lengths of low grade results, the procedure used for such aggregation should be stated and some typical examples of such aggregations should be shown in detail. Higher grade intervals that are internal to broader zones of gold - copper mineralisation are reported as included intervals, using a lower cut-off of 5g/t Au and no minimum width. The assumptions used for any reporting of metal equivalent values should be clearly stated. No metal equivalents have been reported in this announcement. |
|---|---|
| Criteria | JORC Code explanation Commentary |
| Relationship between mineralisation widths and intercept lengths |
These relationships are particularly important in the reporting of exploration results. If the geometry of the mineralisation with respect to the drill hole angle is known, its nature should be reported. If it is not known and only the down hole lengths are reported, there should be a clear statement to this effect (e.g. ‘down hole length, true width not known’). The geometry of the mineralisation is not yet known due to insufficient drilling in the targeted area. |
| Diagrams | Appropriate maps and sections (with scales) and tabulations of intercepts should be included for any significant discovery being reported. These should include, but not be limited to a plane view of drill hole collar locations and appropriate sectional views. Refer to body of this announcement. |
| Balanced Reporting | Where comprehensive reporting of all Exploration Results is not practical, representative reporting of both low and high grades and/or widths should be practiced to avoid misleading reporting of Exploration Results. All significant intervals are reported with a 0.5g/t Au lower cut-off with a minimum threshold of 1gm (internal higher grade intervals quoted at a 5g/t Au lower cut-off). |
| Other substantive exploration data |
Other exploration data, if meaningful and material, should be reported including (but not limited to): geological observation; geophysical survey results; geochemical survey results; bulk samples – size and method of treatment; metallurgical test results; bulk density, groundwater, geotechnical and rock characteristics; potential deleterious or contaminating substances. All meaningful and material information has been included in the body of the text. No metallurgical or mineralogical assessments have been completed. |
| Further Work | The nature and scale of planned further work (e.g. tests for lateral extensions or depth extensions or large – scale step – out drilling). Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive. The next phase of exploration at the Fold Closure prospect will utilise an RC drilling rig to test for lateral and down dip extensions to the areas of high grade gold mineralisation. |