Development of a textural acid rock drainage index for classifying acid formation

Parbhakar-Fox, Anita, Edraki, Mansour, Bradshaw, Dee and Walters, Steve (2011). Development of a textural acid rock drainage index for classifying acid formation. In: Maarten A.T.M. Broekmans, 10th lCAM Proceedings. 10th International Congress for Applied Mineralogy, Trondheim, Norway, (513-521). 1-5 August 2011.

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Name Description MIMEType Size Downloads
Author Parbhakar-Fox, Anita
Edraki, Mansour
Bradshaw, Dee
Walters, Steve
Title of paper Development of a textural acid rock drainage index for classifying acid formation
Conference name 10th International Congress for Applied Mineralogy
Conference location Trondheim, Norway
Conference dates 1-5 August 2011
Proceedings title 10th lCAM Proceedings
Place of Publication Trondheim, Norway
Publisher International Congress for Applied Mineralogy
Publication Year 2011
Sub-type Fully published paper
ISBN 9788273851390
Editor Maarten A.T.M. Broekmans
Start page 513
End page 521
Total pages 9
Collection year 2012
Language eng
Abstract/Summary Textural analyses are largely absent from predictive ARD (acid rock drainage) assessments despite the direct control of texture on acid formation. Therefore, the ARD Index (ARDI) was developed as a simple textural evaluation to be used as a stage 1 test as part of an integrated geochemistry-mineralogy-texture (GMT) approach to predicting ARD. Parameters A, Band C (ranked from 0 to 10) examined contents, degree of alteration and morphology of sulphides, while parameters D and E (ranked from -5 to 10) evaluated the neutralising mineral content and the spatial relationship between acid-forming and neutralising minerals. Scores from each category were totaled with values 50-41 considered as extremely acid forming (EAF); 40-31 as acid forming (AF); 30-21 as potentially acid forming (PAP); 20-11 as nor acid forming (NAF); 10-0 as NAF/ANC and -1 to -10 as having acid-neutralising capacity (ANC). The ARDI was tested using samples from an abandoned lode-gold mine and an operational iron-oxide copper gold mine, both located in Queensland, Australia. Samples were mesotexturally grouped (A-Q) and analysed as per the GMT approach. The ARD identified group J (quartz-pyrite), H (quartz--arsenopyrite-pyrite) and G (quartz-galena-sphalerite) from the lode-Au operations as the most acid forming.
Keyword Acid rock drainage
Static tests
Q-Index Code EX
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Tue, 16 Aug 2011, 14:55:00 EST by Karen Holtham on behalf of Sustainable Minerals Institute