IGGCAS OpenIR  > 矿产资源研究院重点实验室
Geological characteristics, sources and controlling factors of the Triassic gold deposits in the northern margin of the North China Craton
Bai Yang1,2,3,4; Zhang LianChang2,3; Zhu MingTian2,3; Huang Ke2,3; Zhou LingLi5
2022-04-01
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume38Issue:4Pages:993-1024
AbstractThe Triassic is an important metallogenic period of the North China Craton ( NCC ). Triassic gold deposits are widely distributed on the northern margin of the NCC, forming an EW-striking gold metallogenic belt with a length of similar to 1500km, including Wulashan-Daqingshan, Zhangjiakou, Jidong-Liaoxi, Qingchengzi and Jiapigou gold districts. This gold belt is mainly hosted by the Neoarchean-Mesoproterozoic metamorphic rocks and Mesozoic granites. The gold deposits are dominated by quartz-vein mineralization, accompanied by altered-rock type mineralization; the mineralization of the western and central sections of the gold belt are characterized by gold or gold-molybdenum mineralization, whereas the eastern section is dominated by gold polymetallic mineralization. Geochronology data show that the Triassic gold deposits in the northern margin of the NCC were mainly formed in the Late Triassic (240 similar to 220Ma) ; the characteristics of fluid inclusions indicate that the ore-forming fluids have characteristics of medium temperature, low salinity , and low density. It belongs to the H2O-NaCl-CO2 +/- CH4 system, and the phase-separation may be the main mechanism of gold precipitation in quartz-vein type gold deposits; the hydrogen and oxygen isotopic composition shows that the ore-forming fluid was magmatic water or metamorphic water in the early stage and was mixed with atmospheric water in the later stage. The carbon, sulfur, lead, helium and argon isotopes of the ores and the neodymium and hafnium isotopic compositions of the mineralization-related rocks indicate that the ore-forming fluids, materials, and the mineralization-related rocks are all related to crust-mantle mixing. The contribution of mantle-derived materials and fluids is caused by regional Triassic magmatism, moreover, the crust-derived components mainly come from host rocks. The formation of the Triassic gold deposits in the northern margin of the NCC generally respond to the post-orogenic extension of the Central Asian Orogenic Belt. Northern margin of NCC was affected by the post-collision extension of the Central Asian Orogenic Belt in the Late Triassic, causing the initial lithospheric thinning occurred along the northern margin. Series deep-large faults, alkaline, and alkaline granites which simultaneously formed provided superior conditions for the regional gold mineralization. Furthermore, the eastern part of the northern marginal gold belt may also be affected by the collision between the Yangtze Craton and the NCC, which is the main reason for the difference in the mineralization characteristics of the central and western gold districts.
KeywordTriassic gold mineralization belt Ore-forming fluid Material source Regional extension Northern margin of the North China Craton
DOI10.18654/1000-0569/2022.04.04
WOS KeywordASIAN OROGENIC BELT ; ORE-FORMING FLUIDS ; INNER-MONGOLIA ; EASTERN HEBEI ; H-O ; QINGCHENGZI OREFIELD ; INTRUSIVE ROCKS ; JILIN PROVINCE ; GEOCHEMISTRY ; PB
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000798187600004
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106019
Collection矿产资源研究院重点实验室
Corresponding AuthorZhang LianChang
Affiliation1.Taiyuan Univ, Coll Min Engn, Taiyuan 030024, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Durham, Durham DH1 3LE, England
5.Univ Coll Dublin, Sch Earth Sci, iCRAG, Dublin 4, Ireland
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Bai Yang,Zhang LianChang,Zhu MingTian,et al. Geological characteristics, sources and controlling factors of the Triassic gold deposits in the northern margin of the North China Craton[J]. ACTA PETROLOGICA SINICA,2022,38(4):993-1024.
APA Bai Yang,Zhang LianChang,Zhu MingTian,Huang Ke,&Zhou LingLi.(2022).Geological characteristics, sources and controlling factors of the Triassic gold deposits in the northern margin of the North China Craton.ACTA PETROLOGICA SINICA,38(4),993-1024.
MLA Bai Yang,et al."Geological characteristics, sources and controlling factors of the Triassic gold deposits in the northern margin of the North China Craton".ACTA PETROLOGICA SINICA 38.4(2022):993-1024.
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