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Garnet secondary ion mass spectrometry oxygen isotopes reveal crucial roles of pulsed magmatic fluid and its mixing with meteoric water in lode gold genesis

文献类型：期刊论文

作者Fan, Gao-Hua4,5; Li, Jian-Wei4,5; Valley, John W.3; Scicchitano, Maria Rosa2,3; Brown, Philip E.3; Yang, Jin-Hui1; Robinson, Paul T.4,5; Deng, Xiao-Dong5; Wu, Ya-Fei4,5; Li, Zhan-Ke4,5
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2022-05-10
卷号119期号:19页码:8
ISSN号0027-8424
关键词garnet oxygen isotope magmatic fluid meteoric water lode gold deposit
DOI10.1073/pnas.2116380119
英文摘要Lode gold deposits, which are currently the world's major gold supply, have been shown to be generated mostly by phase separation of metamorphic fluids and/or interaction between these fluids and wall rocks. Here we use garnet oxygen isotopes by secondary ion mass spectrometry to document the crucial role of magmatic hydrothermal fluids and their mixing with meteoric water in the formation of the world-class Dongping gold deposit in the North China Craton. Garnet grains from quartz veins of various paragenetic stages and the mineralized alteration envelope at Dongping have dynamic delta O-18 variations of 3.8 to 211.0%, with large intragrain fluctuations up to 5.3%. These values correspond to calculated delta O-18 values of 6.1 to 29.1% for the hydrothermal fluids from which the garnet formed. The isotope data, notably the cyclic alternation in delta O-18 within individual garnet grains, are best interpreted to reflect multiple pulses of magmatically derived fluids and subsequent mixing of each pulse with variable amounts of meteoric water. The results presented here allow us to quantify the significant interplay between magmatic hydrothermal fluids and meteoric water that spanned the entire mineralization history and triggered gold deposition of a lode gold deposit. This study highlights the potential use of in situ oxygen isotope analysis of garnet in tracing the origin and evolution of hydrothermal fluids in the Earth's crust that may have formed other giant ore deposits.
WOS关键词LA-ICP-MS ; DEPOSIT ; FRACTIONATION ; ORIGIN ; SKARN ; PRECIPITATION ; CONSTRAINTS ; SYENITE ; SYSTEMS ; WINDOWS
资助项目Ministry of Science and Technology of China[2016YFC0600104] ; National Natural Science Foundation of China[41325007] ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; NSF[EAR -2004618] ; University of Wisconsin -Madison
WOS研究方向Science & Technology - Other Topics
语种英语
出版者NATL ACAD SCIENCES
WOS记录号WOS:000839394900004
资助机构Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; NSF ; NSF ; University of Wisconsin -Madison ; University of Wisconsin -Madison ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; NSF ; NSF ; University of Wisconsin -Madison ; University of Wisconsin -Madison ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; NSF ; NSF ; University of Wisconsin -Madison ; University of Wisconsin -Madison ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; Fundamental Research Funds for National University, China University of Geosciences (Wuhan) ; NSF ; NSF ; University of Wisconsin -Madison ; University of Wisconsin -Madison
源URL[http://ir.iggcas.ac.cn/handle/132A11/108446]  
专题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Li, Jian-Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Deutsch GeoForschungsZentrum GFZ, D-14473 Potsdam, Germany
3.Univ Wisconsin, Dept Geosci, WiscSIMS, Madison, WI 53706 USA
4.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China
5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Gao-Hua,Li, Jian-Wei,Valley, John W.,et al. Garnet secondary ion mass spectrometry oxygen isotopes reveal crucial roles of pulsed magmatic fluid and its mixing with meteoric water in lode gold genesis[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2022,119(19):8.
APA Fan, Gao-Hua.,Li, Jian-Wei.,Valley, John W..,Scicchitano, Maria Rosa.,Brown, Philip E..,...&Zhao, Shao-Rui.(2022).Garnet secondary ion mass spectrometry oxygen isotopes reveal crucial roles of pulsed magmatic fluid and its mixing with meteoric water in lode gold genesis.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,119(19),8.
MLA Fan, Gao-Hua,et al."Garnet secondary ion mass spectrometry oxygen isotopes reveal crucial roles of pulsed magmatic fluid and its mixing with meteoric water in lode gold genesis".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 119.19(2022):8.

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来源：地质与地球物理研究所

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