Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China.

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	Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China.
其他题名	Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit,Sanjiang region,Yunnan Province,China
	Zhao Yan 1; Huang YuHan 1; Liang Kun 3; Zhang QiNeng 4
	2015
发表期刊	ACTA PETROLOGICA SINICA
ISSN	1000-0569
卷号	31 期号:11 页码:3297-3308
摘要	The Zhenyuan gold deposit, also named Laowangzhai gold deposit, is one of the super-large Au deposits in the Ailaoshan gold belt of the Sanjiang region, SW China. Previous studies had verified that the characteristics of ore-forming fluid can be reflected by REE and trace elements patterns contained in pyrite minerals. Pyrites' REE and trace element compositions from the Zhenyuan gold deposit was measured by ICP-MS in our study. Four stages of pyrites were identified, including pyrite veins ( stage I), massive pyrite ( stage II), disseminated pyrite ( stage III) accompanied by stibnite and chalcopyrite and crushed massive pyrite ( stage N). Diverse types of rocks in the deposit were mineralized and ore types include altered sandstone, carbonaceous slate, marbles, ophiolite, altered granite and lamprophyre. ICP-MS test result shows compared to the other three stages pyrite, pyrite in stage I has enrichment of HFSE such as Th, U, Ta, Nb, Zr and Hf, and deficit of LILE. Sigma REE content of pyrite in Zhenyuan gold deposit is low. REE ranges from 4.72 x 10(-6) to 48. 96 x 10(-6), with an average of 24. 93 x 10(-6). REE distribution reveals a light REE ( LREE) enrichment pattern, with negative Eu anomalies and absence of Ce anomalies. E REE content in stage I is relative high, and the LREE/HREE ratios are low, showing similarity with those in the ultrabasic rocks. Pyrite from stage I bears a much lower E REE content than that in Stage 1ff, while the LREE/HREE ratios are higher. E REE contents in stage IV pyrite are also very low. Pyrites from the deposit have a combined genesis of sedimentary and hydrothermal in the Co/Ni diagram. Pyrite elemental compositions also indicate ore-forming fluid in the Zhenyuan gold deposit might be a reductive fluid containing F. Due to this study, two periods for Au mineralization were identified in the Zhenyuan gold deposit. Pyrite of stage I represents the early Au mineralization related to the formation of accretionary wedge containing ultramafic rocks during the closure of Paleotethyan Ailaoshan Ocean. A later Au mineralization period expressed by the stage III pyrite accompanied with stibnite and chalcopyrite was triggered by the metamorphism due to the underthrust of the South China block and the shearing along the Ailaoshan-Honghe belt.
关键词	AILAOSHAN OROGENIC BELT SW CHINA GEOCHEMISTRY GENESIS MINERALIZATION LAMPROPHYRES AUSTRALIA OREFIELD TETHYS ZONE Pyrite Rare Earth Element Trace element Ore-forming materials Metallogenic stages Zhenyuan gold deposit Yunnan Province
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:5566983
引用统计	被引频次：10[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/148282
专题	中国科学院金属研究所
作者单位	1.China University Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.中国科学院金属研究所 3.Forth Geol Explorat Institute Heilongjiang Prov, Haerbin 150036, Peoples R China 4.Yunnan Institute Geol & Mineral Resources Explorat, Kunming 650051, Peoples R China
推荐引用方式 GB/T 7714	Zhao Yan,Huang YuHan,Liang Kun,et al. Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China.[J]. ACTA PETROLOGICA SINICA,2015,31(11):3297-3308.
APA	Zhao Yan,Huang YuHan,Liang Kun,&Zhang QiNeng.(2015).Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China..ACTA PETROLOGICA SINICA,31(11),3297-3308.
MLA	Zhao Yan,et al."Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China.".ACTA PETROLOGICA SINICA 31.11(2015):3297-3308.