Biogeochemistry and geobotany of Pb-Zn gossans, northwest Queensland, Australia

Lottermoser, Bernd G., Ashley, Paul , and Munksgaard, Niels C. (2007) Biogeochemistry and geobotany of Pb-Zn gossans, northwest Queensland, Australia. In: Papers from the 23rd International Applied Geochemistry Symposium . From: 23rd International Applied Geochemistry Symposium , 14-19 June 2007, Oviedo, Spain.

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Abstract

The aims of the study were to investigate the biogeochemistry and geobotany of plants growing on gossanous outcrops of Pb-Zn sulfide ores in the Mount Isa Inlier, northwest Queensland, Australia. The ferruginous, jaspery, Mn oxide-stained gossans are characterised by major Pb and Zn, minor As and Cu, and traces of Ag, Ba, Be, Bi, Cd, Ce, Co, la, Mo, Sb, Sr, U and W. Distinct botanical communities grow on acidic soils at the gossan sites. The above-ground biomass of plant species accumulate Zn and to a lesser degree other metals on gossanous soils compared to background sites. Lead bioavailability appears to be constrained by the presence of the poorly soluble Pb phases plumbogummite and plumbojarosite. However, plant species are still able to grow on substrates with elevated bioavailable Pb concentrations (as determined by OTPA extractions), suggesting that some plants actively exclude Pb. Such metal excluding plant species may be used for the rehabilitation of metalliferous mine sites in the region.

Item ID: 8159
Item Type: Conference Item (Abstract / Summary)
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ISBN: 978-84-690-6461-0
Date Deposited: 12 Feb 2010 01:46
FoR Codes: 04 EARTH SCIENCES > 0402 Geochemistry > 040202 Inorganic Geochemistry @ 100%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8498 Environmentally Sustainable Mineral Resource Activities > 849899 Environmentally Sustainable Mineral Resource Activities not elsewhere classified @ 100%
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