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As Of Filer Filing For·On·As Docs:Size Issuer Agent 7/14/06 Augusta Resource Corp 40FR12B 7/13/06 61:4.7M Newsfile Corp/FA |
Document/Exhibit Description Pages Size 1: 40FR12B Registration Statement HTML 69K 2: EX-99.1 Annual Information Form for the Year Ended HTML 180K December 31, 2005 11: EX-99.10 MD&A for the Six Months Ended June 30, 2005 HTML 120K 12: EX-99.11 First Quarter Report HTML 144K 13: EX-99.12 MD&A for the Three Months Ended March 31, 2005 HTML 80K 14: EX-99.13 Management Information Circular HTML 129K 15: EX-99.14 Form of Proxy HTML 34K 16: EX-99.15 Preliminary Assessment and Economic Evaluation HTML 373K 17: EX-99.16 Mineral Resource Estimate HTML 257K 18: EX-99.17 News Release Dated June 30, 2006 HTML 27K 19: EX-99.18 Material Change Report Dated June 26, 2006 HTML 22K 20: EX-99.19 Material Change Report Dated June 14, 2006 HTML 48K 3: EX-99.2 Annual Information Form for the Year Ended HTML 254K December 31, 2004 21: EX-99.20 Material Change Report Dated June 5, 2006 HTML 21K 22: EX-99.21 Material Change Report Dated June 2, 2006 HTML 19K 23: EX-99.22 Material Change Report Dated May 18, 2006 HTML 25K 24: EX-99.23 Material Change Report Dated May 5, 2006 HTML 26K 25: EX-99.24 Material Change Report Dated April 27, 2006 HTML 19K 26: EX-99.25 Material Change Report Dated April 11, 2006 HTML 18K 27: EX-99.26 Material Change Report Dated April 7, 2006 HTML 26K 28: EX-99.27 Material Change Report Dated March 17, 2006 HTML 23K 29: EX-99.28 Material Change Report Dated March 6, 2006 HTML 20K 30: EX-99.29 Material Change Report Dated February 16, 2006 HTML 23K 4: EX-99.3 Audited Annual Financial Statements HTML 534K 31: EX-99.30 Material Change Report Dated January 26, 2006 HTML 31K 32: EX-99.31 Material Change Report Dated January 16, 2006 HTML 26K 33: EX-99.32 Material Change Report Dated January 16, 2006 HTML 30K 34: EX-99.33 Material Change Report Dated November 22, 2005 HTML 21K 35: EX-99.34 Material Change Report Dated November 11, 2005 HTML 28K 36: EX-99.35 Material Change Report Dated October 13, 2005 HTML 26K 37: EX-99.36 Material Change Report Dated September 29, 2005 HTML 22K 38: EX-99.37 Material Change Report Dated September 20, 2005 HTML 20K 39: EX-99.38 News Release Dated September 9, 2005 HTML 18K 40: EX-99.39 News Release Dated August 25, 2005 HTML 21K 5: EX-99.4 MD&A for the Years Ended December 31, 2005 and HTML 169K 2004 41: EX-99.40 Material Change Report Dated August 25, 2005 HTML 18K 42: EX-99.41 Material Change Report Dated July 12, 2005 HTML 23K 43: EX-99.42 Material Change Report Dated July 5, 2005 HTML 20K 44: EX-99.43 News Release Dated June 23, 2005 HTML 20K 45: EX-99.44 Material Change Report Dated June 14, 2005 HTML 20K 46: EX-99.45 News Release Dated June 9, 2005 HTML 19K 47: EX-99.46 Material Change Report Dated June 8, 2005 HTML 27K 48: EX-99.47 Material Change Report Dated May 13, 2005 HTML 23K 49: EX-99.48 Material Change Report Dated May 13, 2005 HTML 22K 50: EX-99.49 Material Change Report Dated March 29, 2005 HTML 21K 6: EX-99.5 First Quarter Report HTML 198K 51: EX-99.50 Material Change Report Dated March 4, 2005 HTML 22K 52: EX-99.51 News Release Dated March 4, 2005 HTML 24K 53: EX-99.52 News Release Dated March 1, 2005 HTML 26K 54: EX-99.53 News Release Dated February 17, 2005 HTML 18K 55: EX-99.54 News Release Dated February 11, 2005 HTML 18K 56: EX-99.55 News Release Dated February 8, 2005 HTML 21K 57: EX-99.56 Material Change Report Dated January 27, 2005 HTML 22K 58: EX-99.57 Consent of Expert in Connection With the Paee HTML 18K Report 59: EX-99.58 Consent of Expert in Connection With the Rosemont HTML 18K Property Report 60: EX-99.59 Auditor's Consent (Ernst & Young LLP) HTML 17K 7: EX-99.6 MD&A for the Three Months Ended March 31, 2006 HTML 99K 61: EX-99.60 Auditor's Consent (Deloitte & Touche LLP) HTML 17K 8: EX-99.7 Third Quarter Report HTML 244K 9: EX-99.8 MD&A for the Nine Months Ended September 30, 2005 HTML 135K 10: EX-99.9 Second Quarter Report HTML 239K
Filed by Automated Filing Services Inc. (604) 609-0244 - Augusta Resource Corporation - Exhibit 23 |
BC FORM 53-901F
This is the form of a material change report required under section 85 (1) of the Securities Act and section 151 of the Securities Rules.
Item 1: Reporting Issuer
Augusta Resource Corporation (“Augusta” or the “Company”)
400 - 837 West Hastings Street
Vancouver, B.C. V6C 3N6
Item 2: Date of Material Change
Item 3: Press Release
Item 4: Summary of Material Change
The Company announces that it has positive results from metallurgical test work that will impact production and process techniques to be used at the Company’s Rosemont copper/ molybdenum project located near Tucson Arizona. The new findings, as detailed in Item 5 below, will have a major positive impact on flow sheet design and the financial performance of the Rosemont project.
These positive evaluations affect the existing overall plant design, plant facility siting, utility demand, and project financial analysis. Augusta was scheduled to complete a pre-feasibility study during the first quarter 2006, but as a result of these new developments, the Company has decided to complete the pre-feasibility study in two stages in order to accommodate the new findings: 1) a preliminary economic assessment to be published late May 2006, and 2) the more comprehensive pre-feasibility study to be completed early in the third quarter 2006.
The schedule for completion of a full feasibility study early in the first quarter of 2007 remains unchanged. The Company’s 2006 twenty thousand (20,000) meter exploration, in-fill and geotechnical drilling campaigns at Rosemont are underway with three drill rigs in operation.
Item 5: Full Description of Material Change
The Company announces that it has positive results from metallurgical test work that will impact production and process techniques to be used at the Company’s Rosemont copper/ molybdenum project located near Tucson Arizona. The new findings, as detailed below, will have a major positive impact on flow sheet design and the financial performance of the Rosemont project.
In summary Augusta has made the following determinations:
1) The Company is studying the feasibility of an open pit mine, concentrator and leaching facility with a concentrator production capacity of approximately 68,000 tonnes per day in order to produce estimated annual sales of 225 to 230 million pounds of recovered copper and over 5 million pounds of molybdenum over a 17-22 year period. Initial open pit optimization work indicates an overall waste to ore stripping ratio of approximately 1.55:1 may be obtainable depending on the outcome of geotechnical drilling and ultimate mine design layouts. The Company has not yet completed a full feasibility study. Therefore there is no certainty that economic operations will be realized until a positive study is completed.
2) Fractional analysis and flotation test work indicate that copper minerals are easily liberated and that copper sulfide recoveries of greater than 90% and concentrate copper grades in excess of 38% Cu are obtainable from a simple open cycle flotation flow sheet,
3) Test work indicates that the sulfide copper concentrate is amenable to hydrometallurgical techniques for the production of copper cathode on site. Flow sheets are currently being assessed.
Page 2
4) Augusta has identified that initial material classified as overburden/waste contains soluble oxide copper as well as leachable sulfide copper at potentially economic grades. Augusta is currently conducting a work program (see March 17 press release) to quantify a NI 43-101 compliant oxide resource in the near surface zones of the deposit.
5) Past records and current drill assays show a significant content of bi-product silver and gold in addition to the recoverable molybdenum. Augusta is currently re-assaying drill core (see March 17 press release) to establish a silver resource.
Mountain States Research and Development (“MSRDI”) of Tucson Arizona, has recently completed metallurgical testing of representative composite samples in the main copper mineralized zones of the deposit. It was established that the predominant copper sulfide minerals are bornite, chalcocite and much lesser amounts of chalcopyrite than previously thought from the historic limited metallurgical work conducted by Anamax.
The predominance of bornite mineralization leads to new opportunities for producing much higher grade concentrates, opportunities to simplify the concentrator flow sheet, efficiently process mill concentrates using existing hydrometallurgical technologies, and to ultimately produce copper cathode on site.
In addition to the above findings, Augusta has also identified the potential for processing copper oxide mineralization. Column leaching tests conducted at MSRDI on oxide copper material from overburden samples combined with the Company’s current program of assaying and re-logging of existing historic drill core at Rosemont will allow for the determination of the grades and distribution of economically recoverable copper within the low grade overburden. Only 30% of the diamond drill core penetrating overburden zones were assayed for oxide copper historically. Augusta is currently assaying oxide zone historic core. Initial on column leach test work indicate economic copper recoveries and acid consumption rates.
The metallurgical test work underway will also determine the amounts of silver and gold that report as a byproduct of sulfide copper production. This is concurrent with the Company’s previously announced program of re-assay of sulfide drill core for precious metals in order to establish an NI 43-101 compliant resource for silver and potentially for gold.
Test work is also underway to evaluate the application of water conservation measures commonly used in arid areas of Australia and South America; these conservation measures have the potential to reduce water evaporative losses as well as seepage losses of process water. Besides the environmental/conservation benefits, they could ultimately reduce operating costs over conventional tailings ponds in the arid climate of Arizona.
These positive evaluations affect the existing overall plant design, plant facility siting, utility demand, and project financial analysis. Augusta was scheduled to complete a pre-feasibility study during the first quarter 2006, but as a result of these new developments, the Company has decided to complete the pre-feasibility study in two stages in order to accommodate the new findings: 1) a preliminary economic assessment to be published late May 2006, and 2) the more comprehensive pre-feasibility study to be completed early in the third quarter 2006.
The schedule for completion of a full feasibility study early in the first quarter of 2007 remains unchanged. The Company’s 2006 twenty thousand (20,000) meter exploration, in-fill and geotechnical drilling campaigns at Rosemont are underway with three drill rigs in operation.
Item 6: Reliance on section 85 (2) of the Act
This report is not confidential.
Item 7: Omitted Information
No information has been omitted in this regard.
Item 8: Senior Officers
Gil Clausen – President and CEO, Tel: 303-300-0134
Page 3
Richard W. Warke – Chairman, Donald B. Clark – Chief Financial Officer, Purni Parikh – Corporate Secretary, Tel: 604.687.1717
Item 9: Statement of Senior Officer
The foregoing accurately discloses the material change referred to herein.
DATED at Vancouver, B.C. this 5th day of May 2006.
/s/ | “Purni Parikh” | |
Name: | Purni Parikh | |
Title: | Corporate Secretary |
This ‘40FR12B’ Filing | Date | Other Filings | ||
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Filed as of: | 7/14/06 | F-X | ||
Filed on: | 7/13/06 | F-X | ||
5/1/06 | ||||
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