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Hydrothermal apatite SIMS Th-Pb dating: Constraints on the timing of low-temperature hydrothermal Au deposits in Nibao, SW China
Chen, Maohong1; Bagas, Leon1,2; Liao, Xin3,4; Zhang, Zhiqiang2; Li, Qiuli3,4
2019
Source PublicationLITHOS
ISSN0024-4937
Volume324Pages:418-428
AbstractPrecise geochronology is a crucial tool for understanding the genesis of low-temperature hydrothermal mineral deposits, but datable minerals are not always available; e.g., mineralization within sedimentary rocks, such as Carlin-type or Carlin-like Au deposits. Here, we demonstrate that hydrothermal apatite associated with Au from the large Nibao deposit in the Yunnan-Guizhou-Guangxi region of South China can be dated to yield the age of Au mineralization. Nibao is a Carlin-like deposit hosted in a Permian carbonate-bearing pyrodastic breccia The auriferous minerals are predominantly zoned pyrite containing As-, Cu-, and Au-rich rims. Euhedral and subhedral apatite forms a mosaic texture and is intergrown with hydrothermal quartz, senate, and zoned auriferous pyrite, indicating that the apatite is of hydrothermal origin and was coeval with Au mineralization. Unlike sedimentary and igneous apatite, hydrothermal apatite is relatively depleted in LREEs, enriched in MREEs, and slightly depleted in Eu. Hydrothermal apatite also has high Th/U ratios, negligible U concentrations, and very low concentrations of common Pb. This makes the apatite a potential candidate for Th-Pb dating. Our SIMS Th-Pb analyses yield a weighted mean Th-232/Pb-208 age of 141 +/- 3 Ma (N = 23, MSWD = 2.2) for apatite coeval with auriferous pyrite, and this is the best estimate of the timing of Au mineralization. Hydrothermal apatite is also present in similar deposits in the Golden Triangle of South China. Therefore, Th-Pb dating of hydrothermal apatite potentially allows for the accurate dating of low-temperature hydrothermal deposits in China and worldwide. (C) 2018 Elsevier B.V. All rights reserved.
KeywordHydrothermal apatite SIMS Th-Pb dating Low-temperature hydrothermal deposits
DOI10.1016/j.lithos.2018.11.018
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey
WOS KeywordU-PB ; GOLD DEPOSITS ; GUIZHOU PROVINCE ; SOUTH CHINA ; WORKING REFERENCE ; CONODONT APATITE ; YOUJIANG BASIN ; SM-ND ; AGE ; ZIRCON
Language英语
Funding ProjectNational Key R&D Program of China[2016YFE0203000] ; National Key Basic Research Program of China[2014CB440902] ; National Natural Sciences Foundation of China[41572072] ; National Natural Sciences Foundation of China[41521062] ; China Geological Survey[DD20160124]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey ; National Key R&D Program of China ; National Key R&D Program of China ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Natural Sciences Foundation of China ; National Natural Sciences Foundation of China ; China Geological Survey ; China Geological Survey
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000457819800028
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90498
Collection岩石圈演化国家重点实验室
Corresponding AuthorLi, Qiuli
Affiliation1.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
2.China Univ Geosci, Sch Earth Sci & Mineral Resources, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 10009, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Maohong,Bagas, Leon,Liao, Xin,et al. Hydrothermal apatite SIMS Th-Pb dating: Constraints on the timing of low-temperature hydrothermal Au deposits in Nibao, SW China[J]. LITHOS,2019,324:418-428.
APA Chen, Maohong,Bagas, Leon,Liao, Xin,Zhang, Zhiqiang,&Li, Qiuli.(2019).Hydrothermal apatite SIMS Th-Pb dating: Constraints on the timing of low-temperature hydrothermal Au deposits in Nibao, SW China.LITHOS,324,418-428.
MLA Chen, Maohong,et al."Hydrothermal apatite SIMS Th-Pb dating: Constraints on the timing of low-temperature hydrothermal Au deposits in Nibao, SW China".LITHOS 324(2019):418-428.
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