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Minerals 2018, 8(4), 164; https://doi.org/10.3390/min8040164

Source and Enrichment of Toxic Elements in Coal Seams around Mafic Intrusions: Constraints from Pyrites in the Yuandian Coal Mine in Anhui, Eastern China

1
School of Resource and Environment Engineering, Anhui University, Hefei 230601, China
2
Faculty of Science, University of Brunei Darussalam, Gadong BE1410, Brunei Darussalam
3
Centre for Excellence in Ore Deposits (CODES), University of Tasmania, Hobart 7001, Australia
*
Authors to whom correspondence should be addressed.
Received: 7 March 2018 / Revised: 8 April 2018 / Accepted: 8 April 2018 / Published: 17 April 2018
(This article belongs to the Special Issue Toxic Mineral Matter in Coal and Coal Combustion Products)
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Abstract

Pyrite, a mineral that can cause potential environmental issues in coal mining, is commonly found in coal seams around intrusions. In this paper, pyrites from the Yuandian Coal Mine (Huaibei Coalfield, Anhui, Eastern China) were studied using SEM, Raman and LA-ICP-MS. The pyrite morphologic and geochemical data suggest that (1) four pyrite generations are present (framboidal sedimentary pyrites (Py I) in the original coal, coarse-grained magmatic pyrites (Py II) in the intruding diabase, fine-grained metamorphic pyrites (Py III) in the intrusive contact aureole, and spheroid/vein hydrothermal pyrites (Py IV) in the cokeite); and (2) concentrations of cobalt, nickel, arsenic, selenium, lead and copper in the metamorphic pyrites are much higher than the other pyrite generations. We propose that mafic magmatism is the main contributor of the toxic elements to the intrusion-related cokeite at Yuandian. View Full-Text
Keywords: Yuandian Coal Mine; pyrite generations; morphology; toxic elements; Eastern China Yuandian Coal Mine; pyrite generations; morphology; toxic elements; Eastern China
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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An, Y.; Liu, L.; Wang, M.; Zheng, S.; Guo, Y.; Zhang, S.; Lai, C. Source and Enrichment of Toxic Elements in Coal Seams around Mafic Intrusions: Constraints from Pyrites in the Yuandian Coal Mine in Anhui, Eastern China. Minerals 2018, 8, 164.

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