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Texture, geochemistry, and geochronology of titanite and pyrite: Fingerprint of magmatic-hydrothermal fertile fluids in the Jiaodong Au province

文献类型：期刊论文

作者Li, Xing-Hui3,4; Fan, Hong-Rui3,4,5; Zhu, Ri-Xiang4,5,6; Steele-MacInnis, Matthew1; Yang, Kui-Feng3,4,5; Liu, Cai-Jie2
刊名AMERICAN MINERALOGIST
出版日期2022-02-23
卷号107期号:2页码:206-220
ISSN号0003-004X
关键词Titanite pyrite monazite biotite monzonite U-Pb geochronology magmatic-hydrothermal fluid
DOI10.2138/am-2021-7889
英文摘要The Au mineralization in the giant Jiaodong Au province is enigmatic and difficult to fit current classic mineralization models, primarily because of uncertainties as to the sources of ore-forming fluids and metals. The ca. 120 Ma Au mineralization has been previously proposed to have occurred during a magmatic lull, which would negate a magmatic-hydrothermal genetic model. However, recent drilling has revealed a buried mineralized monzonite equivalent in age to the Au mineralization in the Linglong goldfield. Here, we present comprehensive textural, geochemical [LA-(MC)-ICP-MS trace element, Nd and S isotopes] and geochronological (LA-ICP-MS U-Pb dating) analyses of titanite and pyrite from this previously unrecognized monzonite. Three types of titanite were distinguished, including magmatic Ttn1 and hydrothermal Ttn2 and Ttn3, which show indistinguishable U-Pb ages (120.7 +/- 3.1 and 120.9 +/- 2.6 Ma), REE patterns and Nd isotopes [epsilon(Nd)(t) = -14.7 to -12.9], implying that hydrothermal fluids were directly exsolved from the monzonitic magma, contemporaneous with the large-scale Au mineralization at ca. 120 Ma. The Nd isotopes of titanite potentially indicate a lower crustal source mixed with mantle materials for the monzonite. Four types of pyrite were analyzed, including magmatic Py1 from fresh biotite monzonite, hydrothermal Py2 from altered biotite monzonite, hydrothermal Py3 from quartz-pyrite veins with a monazite U-Pb age of 118.2 +/- 4.6 Ma, and magmatic Py4 from mafic enclaves of the Gushan granite at ca.120 Ma. The delta S-34 values of magmatic Py1 and Py4 (+1.9 to +6.3 parts per thousand, and +5.0 to +6.4 parts per thousand, respectively) and hydrothermal Py2 and Py3 (+6.4 to +9.5 parts per thousand and +6.5 to +7.6 parts per thousand, respectively) are consistent with sulfur isotopic fractionation between melt and fluid. Hydrothermal Py2 and Py3 also have higher Co, As, Ag, Sb, and Bi contents and submicrometer gold inclusions, implying that the magmatic-hydrothermal fluids were fertile for mineralization. This study highlights the importance of monzonite magmatism and exsolved fertile fluids in regional Au mineralization. Hydrous magmas at ca. 120 Ma probably extracted Au eficiently from the lower crustal-mantle sources and released auriferous fluids at the late magmatic stage, leading to the formation of Au deposits in the Jiaodong province.
WOS关键词NORTH CHINA CRATON ; OROGENIC GOLD DEPOSITS ; SITU SULFUR ISOTOPE ; ORE-FORMING FLUIDS ; U-PB GEOCHRONOLOGY ; TRACE-ELEMENT ; SM-ND ; SHANDONG PROVINCE ; POLYGENETIC TITANITE ; ZIRCON GEOCHRONOLOGY
资助项目National Natural Science Foundation of China[42002078] ; China National Postdoctoral Program for Innovative Talents[BX20190327] ; China Postdoctoral Science Foundation[2019M660788]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者MINERALOGICAL SOC AMER
WOS记录号WOS:000748182500005
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/104033]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Fan, Hong-Rui
作者单位1.Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB T6G 2E3, Canada
2.6 Inst Geol & Mineral Resources Explorat Shandong, Zhaoyuan 265400, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Xing-Hui,Fan, Hong-Rui,Zhu, Ri-Xiang,et al. Texture, geochemistry, and geochronology of titanite and pyrite: Fingerprint of magmatic-hydrothermal fertile fluids in the Jiaodong Au province[J]. AMERICAN MINERALOGIST,2022,107(2):206-220.
APA Li, Xing-Hui,Fan, Hong-Rui,Zhu, Ri-Xiang,Steele-MacInnis, Matthew,Yang, Kui-Feng,&Liu, Cai-Jie.(2022).Texture, geochemistry, and geochronology of titanite and pyrite: Fingerprint of magmatic-hydrothermal fertile fluids in the Jiaodong Au province.AMERICAN MINERALOGIST,107(2),206-220.
MLA Li, Xing-Hui,et al."Texture, geochemistry, and geochronology of titanite and pyrite: Fingerprint of magmatic-hydrothermal fertile fluids in the Jiaodong Au province".AMERICAN MINERALOGIST 107.2(2022):206-220.

入库方式： OAI收割

来源：地质与地球物理研究所

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