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Gold mobilization during prograde metamorphism of clastic sedimentary rocks: An example from the Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton
Cui, Weilong1,2; Guo, Jinghui1,2; Huang, Guangyu1; Wang, Zaicong3; Liu, Yanhong1; Yang, Jinhui1,2
2022
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume140Pages:15
AbstractAbundant gold deposits are distributed in the Jiao-Liao-Ji Belt of the North China Craton. Gold deposits, characterized by quartz lode or disseminated styles of mineralization with extensive alteration of wall rock, of the Jiaodong Peninsula and Liaodong Peninsula are underlain by rocks of similar geological settings characterized by uplifted blocks of metamorphosed Archean and Proterozoic rocks surrounded by relatively unmetamorphosed Mesoproterozoic rocks and Mesozoic granitoid plutons. The huge order-of-magnitude difference in reserves between the Liaodong gold province (500 t) and the Jiaodong gold province (5000 t) attract the attention of geologists. Different C-H-O-S-Pb isotopes and isotopic dating have sparked controversy over the source of the gold deposits. In this study, we conducted integrated analyses of zircon U-Pb dating, bulk-rock compositions, mineralogical compositions and high-precision gold analyses on a series of meta-clastic sedimentary rocks from the Paleoproterozoic Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton, of which the Au analyses reveal Au mobilization during prograde metamorphism. In the Gaizhou Barrovian-type metamorphic zone, the bulkrock Au contents of samples within various metamorphic zones show a monotonic decrease up-temperature, from 2.09 ppb in the chlorite zone to 0.07 ppb in the sillimanite zone. The evolution in Au content during prograde metamorphism of other formations are identical to that of the Gaixian Formation. The Au concentrations of biotite in different metamorphic zones show little variation ranging from 0.66 to 0.35 ppb, whereas the Au concentrations of muscovite in different metamorphic zones mainly decrease from 2.60 ppb in the chlorite zone to 0.57 ppb in the sillimanite zone with increasing metamorphic grade in samples without metallic sulfides. Coincidently, there is a dechlorination process in biotites during regional metamorphism. Chlorine, released by metamorphism, may have played a vital role in the migration of Au, which could absorb onto muscovite and other minerals, during prograde metamorphism. Given an Au content of 4.67 t/km3 in the chlorite zone rock approximately equivalent to the protolith, metamorphism up to upper amphibolite grade would force the rocks to release 52% of the Au in the Gaizhou Barrovian-type metamorphic zone. Taking into account previous studies in the interpretation of our results, we propose that Precambrian rocks, such as the meta-clastic sedimentary rocks of the Gaixian Formation, may have contributed considerable amounts of Au to the Liaodong gold province. The Liaohe Group releasing large amounts of Au during Paleoproterozoic metamorphism, may thus provide the primary Au enrichment for the Mesozoic gold deposits.
KeywordGold Liaohe Group Prograde metamorphism Liaodong North China Craton
DOI10.1016/j.oregeorev.2021.104624
Funding OrganizationMajor State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordPALEOPROTEROZOIC CRUSTAL EVOLUTION ; U-PB ; EASTERN BLOCK ; BARROVIAN METAMORPHISM ; REGIONAL METAMORPHISM ; ALPINE SCHISTS ; TRACE-ELEMENTS ; OROGENIC BELT ; OTAGO SCHIST ; FLUID-FLOW
Language英语
Funding ProjectMajor State Research Development Project[2016YFC0600109] ; National Natural Science Foundation of China[41902057] ; National Natural Science Foundation of China[41890832]
Funding OrganizationMajor State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; Major State Research Development Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000731509500002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/103919
Collection岩石圈演化国家重点实验室
Corresponding AuthorGuo, Jinghui
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
3.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Cui, Weilong,Guo, Jinghui,Huang, Guangyu,et al. Gold mobilization during prograde metamorphism of clastic sedimentary rocks: An example from the Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton[J]. ORE GEOLOGY REVIEWS,2022,140:15.
APA Cui, Weilong,Guo, Jinghui,Huang, Guangyu,Wang, Zaicong,Liu, Yanhong,&Yang, Jinhui.(2022).Gold mobilization during prograde metamorphism of clastic sedimentary rocks: An example from the Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton.ORE GEOLOGY REVIEWS,140,15.
MLA Cui, Weilong,et al."Gold mobilization during prograde metamorphism of clastic sedimentary rocks: An example from the Liaohe Group in the Jiao-Liao-Ji Belt, North China Craton".ORE GEOLOGY REVIEWS 140(2022):15.
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