Developments in Acid Rock Drainage Prediction: A Case Study on the Abandoned Croydon Au-mines, Qld, Australia

Parbhakar, Anita, Edraki, Mansour and Walters, Stephen (2009). Developments in Acid Rock Drainage Prediction: A Case Study on the Abandoned Croydon Au-mines, Qld, Australia. In: Willams, P.J. et al, 10th Biennial Meeting of the Society for Geology Applied to Mineral Deposits. SGA 2009: Smart Science for Exploration, Townsville, Qld, Aust., (774-776). 17 - 20 August 2009.


Author Parbhakar, Anita
Edraki, Mansour
Walters, Stephen
Title of paper Developments in Acid Rock Drainage Prediction: A Case Study on the Abandoned Croydon Au-mines, Qld, Australia
Conference name SGA 2009: Smart Science for Exploration
Conference location Townsville, Qld, Aust.
Conference dates 17 - 20 August 2009
Convener Economic Geology Research Unit, Townsville
Proceedings title 10th Biennial Meeting of the Society for Geology Applied to Mineral Deposits
Journal name Smart Science for Exploration and Mining, Vol 1 and 2
Place of Publication Townsville, Qld, Australia
Publisher Society of Geology Applied to Ore Deposits
Publication Year 2009
Sub-type Fully published paper
ISBN 978-0-9805-5868-5
Editor Willams, P.J. et al
Start page 774
End page 776
Total pages 3
Collection year 2010
Language eng
Abstract/Summary Abstract. Fifty-one waste-rock samples collected from the abandoned Croydon Au-mines were categorised into ten mesotextural groups (A to J) and characterised by routine and advanced static geochemical tests to identify which groups are currently responsible for acid generation. Traditional net-acid producing potential (NAPP) test procedures confirmed the absence of effective and longer-term neutralising minerals. Advanced NAG tests were performed and the multi-addition NAG test was identified as the most efficient and accurate relative to the single addition NAG and sequential NAG tests. Mesotexture J (massive quartz-pyrite) and H (massive quartz-arsenopyrite-pyrite) were identified as extremely acid-generating with maximum multi-addition NAG values of 446 and 433 kgH2SO4/t respectively. A new classification approach of comparing paste pH values with a site-specific mineralogical ARD Index was trialled, and confirmed the extremely acid generating nature of mesotextures J and H. Future management of the site should focus remediation efforts on the removal or encapsulation of waste rock demonstrating these two mesotextures.
Subjects E1
960908 Mining Land and Water Management
040202 Inorganic Geochemistry
Keyword ABA
NAG
paste pH
ARD Index
Q-Index Code E1
Q-Index Status Provisional Code

 
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Created: Thu, 01 Apr 2010, 10:49:40 EST by Laurelle Elliott on behalf of Centre For Mined Land Rehabilitation