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Rare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit, Sanjiang region, Yunnan Province, China.
Alternative TitleRare Earth Element and trace element features of auriferous pyrite in the Zhenyuan gold deposit,Sanjiang region,Yunnan Province,China
Zhao Yan1; Huang YuHan1; Liang Kun3; Zhang QiNeng4
2015
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume31Issue:11Pages:3297-3308
AbstractThe 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.
KeywordAILAOSHAN 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
Indexed ByCSCD
Language英语
CSCD IDCSCD:5566983
Citation statistics
Cited Times:10[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148282
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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