ST BARBARA LIMITED — Major Shareholding Notification 2005

Feb 1, 2005

Form 603

Corporations Act 2001 Section 671B

Notice of initial substantial holder

To Company Name/Scheme	Sedimentary Holdings Limited
ACN/ARSN	060 156 452
1. Details of substantial holder (1)NameACN/ARSN (if applicable)	St Barbara Mines Limited009 165 066

The holder became a substantial holder on

28/01/2005

2. Details of voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in on the date the substantial holder became a substantial holder are as follows:

Class of securities (4)	Number of securities	Person's votes (5)	Voting power (6)
Ordinary fully paid	2,08'. 41015.τJ.	.2,081.41$\sim$v	5.5%

3. Details of relevant interests

The nature of the relevant interest the substantial holder or an associate had in the following voting securities on the date the substantial holder became a substantial holder are as follows:

Holder of relevant interest	Nature of relevant interest (7)	Class and number of securities
St Barbara Mines Limited	Beneficial owner	15,412,081 fully paid ordinaryshares

4. Details of present registered holders

The persons registered as holders of the securities referred to in paragraph 3 above are as follows:

Holder of relevantinterest	Registered holder ofsecurities	Person entitled to beregistered as holder (8)	Class and numberof securities
St Barbara Mines Limited	St Barbara MinesLimited	St Barbara Mines Limited	15,412,081 fullypaid ordinary
			shares

5. Consideration

The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four months prior to the day that the substantial holder became a substantial holder is as follows:

Holder of relevantinterest	Date of acquisition	Consideration (9)		Class and numberof securities
		Cash	Non-cash
St Barbara Mines Limited	28 January 2005		69,354,367 fullypaid ordinaryshares in NuStarMining CorporationLimited pursuant toSedimentary'stakeover offer forNuStar MiningCorporation Ltd.	15,412,081 fullypaid ordinaryshares

6. Associates

The reasons the nersons named in paragraph 3 above are associates of the substantial holder are as follows:

Name and ACN/ARSN (if applicable)	Nature of association
Not applicable

7. Addresses

The addresses of persons named in this form are as follows:

Name	Address
St Barbara Mines Limited	Level 2, 16 Ord Street, West Perth, WA, 6005

Signature

print name	Ross Kennedy
sign here

capacity Company Secretary

date 01/02/2005

DIRECTIONS

• If there are a number of substantial holders with similar or related relevant interests (eg. a corporation and its related corporations, or the manager and trustee of an equity $(1)$ trust), the names could be included in an annexure to the form. If the relevant interests of a group of persons are essentially similar, they may be referred to throughout the form as a specifically named group if the membership of each group, with the names and addresses of members is clearly set out in paragraph 7 of the form. $(2)$ See the definition of "associate" in section 9 of the Corporations Act 2001. $(3)$ See the definition of "relevant interest" in sections 608 and 671B(7) of the Corporations Act 2001. The voting shares of a company constitute one class unless divided into separate classes. $\left( 4\right)$ $(5)$ The total number of votes attached to all the voting shares in the company or voting interests in the scheme (if any) that the person or an associate has a relevant interest in. $(6)$ The person's votes divided by the total votes in the body corporate or scheme multiplied by 100. $\overline{(7)}$ Include details of: any relevant agreement or other circumstances by which the relevant interest was acquired. If subsection 671B(4) applies, a copy of any document setting out the $(a)$ terms of any relevant agreement, and a statement by the person giving full and accurate details of any contract, scheme or arrangement, must accompany this form, together with a written statement certifying this contract, scheme or arrangement; and any qualification of the power of a person to exercise, control the exercise of, or influence the exercise of, the voting powers or disposal of the securities to which $(b)$ the refevant interest relates (indicating clearly the particular securities to which the qualification applies). See the definition of "relevant agreement" in section 9 of the Corporations Act 2001. If the substantial holder is unable to determine the identity of the person (eq. if the relevant interest arises because of an option) write "unknown". $(8)$
• $(9)$ Details of the consideration must include any and all benefits, money and other, that any person from whom a relevant interest was acquired has, or may, become entitied to receive in relation to that acquisition. Details must be included even if the benefit is conditional on the happening or not of a contingency. Details must be included of any benefit paid on behalf of the substantial holder or its associate in relation to the acquisitions, even if they are not paid directly to the person from whom the relevant interest was acquired.