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Platinum and Palladium in Coal Rock and Geochemical Anomaly in Eastern Yunnan Province,Southwest China |
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| Authors: | Xia Qinglin Zhao Pengda Cheng Qiuming Chen Yongqing Zhang Shengyuan |
| Affiliation: | 1. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074,China; Faculty of Earth Resources, China University of Geosciences,Wuhan 430074,China 2. China University of Geosciences, Wuhan 430074, Beijing 100083, China 3. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences,Wuhan 430074, China; Department of Earth and Space Science and Engineering, York University,Toronto ON M3J1P3, Canada 4. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China 5. Institute of Natural Resource and Environment Engineering, Shijiazhuang University of Economics,Shijiazhuang 050031, China; State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences, Wuhan 430074, China |
| Abstract: | A series of geochemical anomalies of Pt and Pd were found in 1 358 recombined samples from a geochemical stream sediment survey in eastern Yunnan Province, China. Chemical optical emission spectroscopy, X-ray fluorescence analysis, and inductively coupled plasmas atomic emission spectrometry analyses of 22 elements and chemical compositions of 21 samples from coal-bearing strata from the Late Paleozoic, Mesozoic, and Cenozoic show Pt and Pd concentrated to some extent in coal rocks, with Pd/Pt<1. As, Pt, B, Au, Pd, V, Sb, U, Pb, and W are enriched in the Lower Carboniferous coal-bearing strata of the Wanshoushan Formation; B, Mo, As, Pt, U, W, Pb, Pd, and V are enriched in the Lower Permian coal-bearing strata of the Liangshan Formation; Pt, Cu, Mo, Pd, As, V, and Ag are enriched in the Upper Permian coal-bearing strata of the Xuanwei Formation; As, B, Pb, Pt, Pd, U, W, Sb, Mo, Zn, and Ag are enriched in the Upper Triassic coal-bearing strata of the Xujiahe Formation; and Pt, As, and Pb are enriched in the lignite of the Pliocene Ciying Formation. Combining analyses of the sedimentary environment and local volcanic activity reveal that the coal- bearing strata in the Xuanwei Formation are possibly related to the Permian Emeishan basalt. |
| Keywords: | Pt Pd geochemical anomaly coal rock S-A model |
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