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Precise ages of gold mineralization and pre-gold hydrothermal activity in the Baiyun gold deposit, northeastern China: in situ U-Pb dating of hydrothermal xenotime and rutile

文献类型：期刊论文

作者Feng, Haoxuan4,6; Shen, Ping4,6; Zhu, Rixiang8; Zi, Jian-Wei1,2; Groves, David, I3,5; Li, Changhao4; Wu, Yang4,6; Ma, Ge4; Li, Taiyang7
刊名MINERALIUM DEPOSITA
出版日期2021-11-15
页码22
ISSN号0026-4598
关键词Hydrothermal rutile and xenotime In situ U-Pb dating Trace element geochemistry Gold ore genesis Baiyun gold deposit North China Craton
DOI10.1007/s00126-021-01082-z
英文摘要Timing of the major Baiyun gold deposit (similar to 70 t Au) in the northeastern North China Craton is controversial. A textural and geochronological study of high-grade gold ores identifies three generations of xenotime (Xtm-1, Xtm-2 and Xtm-3), even in single grains. The oldest Xtm-1, in grain cores, is of metamorphic origin, with very high U and U/Th ratios, and hump-shaped, HREE-enriched patterns with maximum normalized values at Yb and large negative Eu anomalies. It is dated at 1856 +/- 6 Ma, consistent with its crystallization during regional metamorphism related to cratonization. In contrast, 244 +/- 2 Ma Xtm-2 overgrowths are of hydrothermal origin, having low U and U/Th ratios and hump-shaped, MREE-enriched patterns with maximum normalized values at Ho and negligible Eu anomalies. Xtm-2 records a previously unrecognized Middle Triassic hydrothermal episode. Xtm-3, in equilibrium with native gold-hosting pyrite and rutile, is also hydrothermal. The Xtm-3 domains have similar U, U/Th ratios, and MREE-enriched patterns to Xtm-2, but a younger crystallization age of 231 +/- 1 Ma. Associated rutile grains that show close textural associations with auriferous pyrite and native gold have an in situ SIMS U-Pb an intercept age of 229 +/- 4 Ma, consistent with that of Xtm-3. Collectively, these reliable ages indicate that gold mineralization at Baiyun occurred at ca. 230 Ma, predating the emplacement of granite intrusions by more than 3 million years. Both the Middle Triassic hydrothermal event (similar to 244 Ma) and the Late Triassic gold mineralization event (similar to 230 Ma) lie within the temporal window of collisional tectonics in the host orogen. In combination, the new geochronology and fluid-inclusion and geological data support Bayun's classification as an orogenic gold deposit.
WOS关键词HF ISOTOPIC COMPOSITIONS ; PORPHYRY CU-AU ; LIAO-JI BELT ; STABLE-ISOTOPE ; TRACE-ELEMENT ; FLUID INCLUSIONS ; UHP METAMORPHISM ; EASTERN BLOCK ; ZIRCON AGES ; CONSTRAINTS
资助项目National Natural Science Foundation of China[91414301] ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences[132A11KYSB20190070]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
出版者SPRINGER
WOS记录号WOS:000718237700001
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 ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/103849]  
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Shen, Ping
作者单位1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
2.Curtin Univ, John de Laeter Ctr, Kent St, Bentley, WA 6102, Australia
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
5.Univ Western Australia, Ctr Explorat Targeting, Crawley, WA 6009, Australia
6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
7.Liaoning Zhaojin Baiyun Gold Min Corp, Dandong 118107, Peoples R China
8.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		 Feng, Haoxuan,Shen, Ping,Zhu, Rixiang,et al. Precise ages of gold mineralization and pre-gold hydrothermal activity in the Baiyun gold deposit, northeastern China: in situ U-Pb dating of hydrothermal xenotime and rutile[J]. MINERALIUM DEPOSITA,2021:22.
APA Feng, Haoxuan.,Shen, Ping.,Zhu, Rixiang.,Zi, Jian-Wei.,Groves, David, I.,...&Li, Taiyang.(2021).Precise ages of gold mineralization and pre-gold hydrothermal activity in the Baiyun gold deposit, northeastern China: in situ U-Pb dating of hydrothermal xenotime and rutile.MINERALIUM DEPOSITA,22.
MLA Feng, Haoxuan,et al."Precise ages of gold mineralization and pre-gold hydrothermal activity in the Baiyun gold deposit, northeastern China: in situ U-Pb dating of hydrothermal xenotime and rutile".MINERALIUM DEPOSITA (2021):22.

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来源：地质与地球物理研究所

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