Continental hydrothermal sedimentary siliceous rock and genesis of superlarge germanium (Ge) deposit hosted in coal:A study from the Lincang Ge deposit,Yunnan,China

	Continental hydrothermal sedimentary siliceous rock and genesis of superlarge germanium (Ge) deposit hosted in coal:A study from the Lincang Ge deposit,Yunnan,China
	QI Huawen; HU Ruizhong; SU Wenchao; QI Liang; FENG Jiayi
	2004
发表期刊	Science in China
卷号	47 期号:11 页码:973-984
合作性质	其它
摘要	There are abundant hydrothermal sedimentary structures and plant fragment fossils in the siliceous rocks from the Lincang Ge deposit. The major element compositions of these siliceous rocks are characterized by high content SiO2, low TiO2 and Al2O3concentrations, and low Al/(Al+Fe+Mn) ratios (0.010 on average). The siliceous rocks are distinctly enriched in Ge, Sb, As, W, and secondly enriched in Cs, U, Mo and Tl. Their total REE content are generally less than 1μg/g, LREE relatively concentrated, and the values of Eu anomaly and Ce anomaly vary from 0.452 to 5.141 and 0.997 to 1.174, respectively. Their NAS-normalized REE patterns are plain or left-inclined. The Oxygen isotope compositions of these siliceous rocks are similar to those of the hydrothermal siliceous sinter. The above characteristics, as well as the geological setting of the deposit, indicate these siliceous rocks formed in continental hydrothermal envi- ronment. As the interlayer or cliff of the Ge-rich coal seams, siliceous rocks tightly contacted with ore-body, and the contents of Ge in siliceous rocks vary from 5.6 to 360 μg/g (78 μg/g on aver- age). The Ge content increased in coal which close to the siliceous rocks. With the increase of Ge content, the typical trace element ratios (i.e., Ge/Ga, Nb/Ta and U/Th) and REE patterns of Ge-rich coal are more close to those of the siliceous rocks. The Ge concentrated in coal seams of the Lincang Ge deposit might be transported by the hydrothermal water, which demonstrated by the siliceous rocks, during the coal-forming processes.
关键词	Siliceous Rock Continental Hydrothermal Sedimentation SuperlarGe Ge Deposit Lincang
学科领域	中国典型特殊区带大规模成矿作用及其动力学
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/352002/3075
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文矿床地球化学国家重点实验室
推荐引用方式 GB/T 7714	QI Huawen,HU Ruizhong,SU Wenchao,et al. Continental hydrothermal sedimentary siliceous rock and genesis of superlarge germanium (Ge) deposit hosted in coal:A study from the Lincang Ge deposit,Yunnan,China[J]. Science in China,2004,47(11):973-984.
APA	QI Huawen,HU Ruizhong,SU Wenchao,QI Liang,&FENG Jiayi.(2004).Continental hydrothermal sedimentary siliceous rock and genesis of superlarge germanium (Ge) deposit hosted in coal:A study from the Lincang Ge deposit,Yunnan,China.Science in China,47(11),973-984.
MLA	QI Huawen,et al."Continental hydrothermal sedimentary siliceous rock and genesis of superlarge germanium (Ge) deposit hosted in coal:A study from the Lincang Ge deposit,Yunnan,China".Science in China 47.11(2004):973-984.

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