Parbhakar-Fox, AK and Edraki, M and Walters, S and Bradshaw, D, A new approach to integration of mineralogy, geochemistry and texture for improving prediction of acid metalliferous drainage from abandoned mines, Proceedings of the 7th Australian Workshop on Acid and Metalliferous Drainage, 21-24 June 2011, Darwin, NT, pp. 1-24. ISBN 978-0-9750304-6-2 (2011) [Refereed Conference Paper]
The GMT approach and ARDI were tested on waste rock samples obtained from the abandoned Croydon Au-mining operations, North Queensland. Acid rock drainage is emanating from these operations causing elevated downstream concentrations of cadmium and zinc relative to the local baseline. Ten mesotextural groups (A-J) were identified from the sampled waste rock. GMT assessments confirmed three groups as environmentally significant in terms of acid metalliferious drainage. Group J (quartz-pyrite) is the most acid generating with the greatest heavy metal contents. Group G (quartz-galena-sphalerite) was identified as the main source of cadmium. Group H (arsenopyrite-pyrite-quartz) contains the greatest quantity of metalloids and is also extremely acid forming. These groups have been selected for detailed kinetic test work.
At the end of stage-one, sample classifications were in agreement with those assigned at the end of stages-two and –three, indicating that for abandoned mine sites such as Croydon, classification of waste rock in terms of acid forming potential could be made based on lower-cost stage-one tests alone.
|Item Type:||Refereed Conference Paper|
|Keywords:||texture, mineralogy, acid mine drainage, Croydon|
|Research Division:||Earth Sciences|
|Research Field:||Exploration Geochemistry|
|Objective Group:||Land and Water Management|
|Objective Field:||Mining Land and Water Management|
|UTAS Author:||Parbhakar-Fox, AK (Dr Anita Parbhakar-Fox)|
|Deposited By:||Earth Sciences|
|Downloads:||1 View Download Statistics|
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