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Zircon U-Pb dating, Hf isotope characteristics of Late Jurassic granites in eastern Jiaodong Peninsula and their constraints on metallogenetic tectonic setting of gold deposit
Wang Dong1,2; Li HongYan2; Wang TianQi2,3; Yu Hong2; Su JianHeng2
2022
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume38Issue:1Pages:41-62
AbstractJiaodong Peninsula is the most important gold producing province in China, with an explored reserve of nearly 5000t gold. However, the gold deposits are very unevenly distributed in this area, e. g. , most in Jiaobei terrane but less in eastern Jiaodong Peninsula. Late Jurassic Linglong pluton is one of the important ore-hosting rocks in Jiaobei terrane. Although Late Jurassic granites also exist in eastern Jiaodong Peninsula, gold deposits are much less abundant in them. Thus, relatively few studies were focused on these granite plutons in the eastern Jiaodong Peninsula. Here, we carried out zircon U-Pb dating and Hf isotopic analysis on the Wendeng and Duogushan plutons in eastern Jiaodong Peninsula to compare them with those of the Linglong pluton in Jiaobei terrane to seek the differences of the gold mineralization in the Late Jurassic granites between these two areas. Our results show that the Wendeng and Duogushan plutons were formed at Late Jurassic (similar to 160Ma) , which is consistent with those of the Linglong pluton. The inherited zircons from the three plutons are all dominated by Triassic (similar to 230Ma) and Neoproterozoic (similar to 780Ma) ages, indicating their magmatic source mainly derived from crustal materials of Yangtze Craton, which had undergone ultrahigh-pressure metamorphism in Triassic. The difference among them is the number of inherited zircons relating to North China Craton (similar to 1400Ma, similar to 1700Ma, similar to 2500Ma) , which are most abundant in Linglong pluton, less in Duogushan pluton, and least in Wendeng pluton. Magmatic zircons from the two plutons in eastern Jiaodong Peninsula have variably negative epsilon(Hf) (160Ma) values, from - 30. 7 to - 20. 3 for Wendeng pluton, and from - 27. 5 to - 17. 9 for Duotgushan pluton. Contrastively, the range of epsilon(Hf) ( 160Ma) values of Linglong pluton is significantly wider, i. e. , from -29. 3 to -9. 3. Moreover, the epsilon(Hf) (160Ma) values also increase gradually from the Wendeng pluton to the Duogushan pluton, and then to the Linglong pluton. The possible interpretation of this trend is that after the collision of the Yangtze Craton and North China Craton in Triassic, the underplating of mantle material induced partial melting of the thickened crust as early as Late Jurassic. Meanwhile, the Jiaobei terrane was influenced by mantle materials, which promoted the pre-enrichment of gold. In contrast, the eastern Jiaodong Peninsula was lack of involvement of mantle material in Late Jurassic, which might be one of the reasons for fewer gold deposits in the area.
KeywordJiaodong area Granite U-Pb dating Hf isotope
DOI10.18654/1000-0569/2022.01.04
WOS KeywordNORTH CHINA CRATON ; EVOLUTION ; MAGMATISM ; CRUST ; AGE
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000771194300004
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105028
Collection岩石圈演化国家重点实验室
Corresponding AuthorLi HongYan
Affiliation1.China Univ Geosci Beijing, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
2.Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Wang Dong,Li HongYan,Wang TianQi,et al. Zircon U-Pb dating, Hf isotope characteristics of Late Jurassic granites in eastern Jiaodong Peninsula and their constraints on metallogenetic tectonic setting of gold deposit[J]. ACTA PETROLOGICA SINICA,2022,38(1):41-62.
APA Wang Dong,Li HongYan,Wang TianQi,Yu Hong,&Su JianHeng.(2022).Zircon U-Pb dating, Hf isotope characteristics of Late Jurassic granites in eastern Jiaodong Peninsula and their constraints on metallogenetic tectonic setting of gold deposit.ACTA PETROLOGICA SINICA,38(1),41-62.
MLA Wang Dong,et al."Zircon U-Pb dating, Hf isotope characteristics of Late Jurassic granites in eastern Jiaodong Peninsula and their constraints on metallogenetic tectonic setting of gold deposit".ACTA PETROLOGICA SINICA 38.1(2022):41-62.
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