Biogeochemical studies at the Khetri copper deposits of Rajasthan,India |
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| Affiliation: | 1. School of Resources and Environment, Hefei University of Technology, Hefei 230026, PR China;2. Department of Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1;3. Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, PR China;4. Department of Geology, University of Toronto, 22 Russell Street, Toronto, Ontario, Canada M5S 3B1;5. Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A 0E8;1. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China;2. Nanjing Institute of Geology and Mineral Resources, Nanjing, 210016, China;1. State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;2. Department of Earth Sciences, University of St Andrews, North Street, St Andrews KY16 9AL, UK;3. School of Earth, Atmosphere & Environment, Monash University, Melbourne, VIC 3800, Australia;4. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | Several plants of the Khetri Copper Deposits of Rajasthan (India) accumulate very high levels of copper. The maximum concentration namely 394 ,μg/g (dry wt.) was found in the leaves of Talinum portulacifolium. Some other copper accumulators with the concentration of the metal in μg/g are: Tephrosia villosa (288), Rhus mysorensis (234) and Bouchea morubifolia (147). The respective biological absorption coefficients (copper in dried plant divided by copper in soil) for these four plants were 0.07, 1.35, 0.13 and 0.26, respectively. Leaves were found to be richer in copper than the stems. Copper levels in the leaves of Tephrosia villosa, Aerua tomentosa and Bouchea morubifolia showed a significant (linear) plant/soil relationship. Rhus mysorensis and Talinum protulacifolium showed absorption barriers at high soil copper concentrations, indicating limits to uptake in these two species. |
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