The occurrence and origin of selenium minerals in Se-rich stone coals, spoils and their adjacent soils in Yutangba, China

	The occurrence and origin of selenium minerals in Se-rich stone coals, spoils and their adjacent soils in Yutangba, China
	Jian-ming Zhu; Thomas M. Johnson; Robert B. Finkelman; Bao-shan Zheng; Ivana Sýkorová; Jiri Pešek
	2012
发表期刊	Chemical Geology
卷号	330–331 期号:1 页码:27-38
摘要	Several Se-bearing minerals have been identified in Se-rich stone coal, spoils, and their adjacent organic-rich soils in Yutangba of Enshi. China, where human Se toxicity occurred in the 1960s. These minerals mainly include native Se (Se-0), krutaite (CuSe2), klockmannite (CuSe), mandarinoite (Fe-2(SeO3)(3)center dot 6H(2)O), Se-bearing chalcopyrite (CuFe(Se,S)(2)), and pyrite (Fe(Se,S)(2)). The assemblage of native Se, krutaite, klockmannite, and Se-bearing pyrite and chalcopyrite is primarily present in the stone coal near a fault plane, while the assemblage of native Se and krutaite is found in the Se-rich carbonaceous mudstone and organic-rich soils which are 60 m away from the stone coal exposure. The assemblage of mandarinoite and native Se is present in abandoned stone coal spoils, where natural combustion occurred. Native Se is quite extensive in the stone coal spoils and nearby soils derived from them. The co-occurrence of Cu-Se minerals and native Sc indicates that these minerals could have formed under a relatively acidic and reducing environment below 220 degrees C, and suggests that Cu could play a significant role in fixing reduced Se ions in the acidic, organic-rich surface environment. Furthermore, the occurrence of mandarinoite suggests that iron-oxides constrain the geochemical behavior of Se in oxidizing environments. Our observations provide new insights into the mechanisms of Se fixation and accumulation during weathering of Se-rich rocks.
关键词	Native Se Cu-selenides Mandarinoite Se-rich Stone Coal China
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4919
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Jian-ming Zhu,Thomas M. Johnson,Robert B. Finkelman,et al. The occurrence and origin of selenium minerals in Se-rich stone coals, spoils and their adjacent soils in Yutangba, China[J]. Chemical Geology,2012,330–331(1):27-38.
APA	Jian-ming Zhu,Thomas M. Johnson,Robert B. Finkelman,Bao-shan Zheng,Ivana Sýkorová,&Jiri Pešek.(2012).The occurrence and origin of selenium minerals in Se-rich stone coals, spoils and their adjacent soils in Yutangba, China.Chemical Geology,330–331(1),27-38.
MLA	Jian-ming Zhu,et al."The occurrence and origin of selenium minerals in Se-rich stone coals, spoils and their adjacent soils in Yutangba, China".Chemical Geology 330–331.1(2012):27-38.

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