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Petrogenesis and metallogenic implications of Late Mesozoic intrusive rocks in the Tongling region, eastern China: a case study and perspective review
Xie, Jiancheng1; Wang, Yu1; Li, Quanzhong1; Yan, Jun1; Sun, Weidong2,3,4
2018
Source PublicationINTERNATIONAL GEOLOGY REVIEW
ISSN0020-6814
Volume60Issue:11-14Pages:1361-1380
Corresponding AuthorXie, Jiancheng(xiejiancheng08@163.com)
AbstractLarge-scale Cu-Au mineralization is associated with Late Mesozoic intrusive rocks in the Tongling region of eastern China, which mainly comprise pyroxene monzodiorite, quartz monzodiorite, and granodiorite. To constrain the petrogenesis of the intrusive rocks and Cu-Au mineralization, detailed analyses of the geochronology, apatite in situ geochemistry, whole-rock geochemistry, and zircon Hf isotopic compositions were performed. Magmatic zircons from pyroxene monzodiorites, quartz monzodiorites, and granodiorites yield U-Pb ages of 136-149Ma, 136-146Ma, and 138-152Ma, respectively, indicating that their formation ages are contemporaneous. Quartz monzodiorites and granodiorites (SiO2=57.9-69.5wt.%) are highly potassic calc-alkaline rocks with adakitic affinity and have low MgO and Y contents, low zircon epsilon(Hf)(t) values (-11.7 to -39.0), high apatite Cl contents (>0.2wt.%), and log fO(2) values (-23.2 to -8.23), indicating that they may have formed when metasomatized mantle-derived magmas mixed with slab-derived magmas before undergoing crustal assimilation and fractional crystallization. Pyroxene monzodiorites (SiO2=48.4-53.0wt.%) are shoshonitic and record high MgO, P2O5, and Y contents, high zircon epsilon(Hf)(t) values (1.55 to -7.87), high oxygen fugacity, low Nb and Ta contents, and low apatite Cl contents (mainly <0.2wt.%), suggesting that they were primarily derived from a metasomatized lithospheric mantle-derived magma that experienced the assimilation of lower crustal materials. The results indicate that the intrusive rocks and associated large-scale Cu-Au mineralization of the Tongling region resulted from the partial melting of the subducted oceanic slab in an oxidizing environment.
KeywordPetrogenesis apatite mantle-derived magma slab-derived magma Cu-Au mineralization Tongling region
DOI10.1080/00206814.2017.1386130
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41373045] ; National Key R&D Program of China[2016YFC0600404]
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000443879500003
PublisherTAYLOR & FRANCIS INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160251
Collection深海极端环境与生命过程研究中心
Corresponding AuthorXie, Jiancheng
Affiliation1.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Xie, Jiancheng,Wang, Yu,Li, Quanzhong,et al. Petrogenesis and metallogenic implications of Late Mesozoic intrusive rocks in the Tongling region, eastern China: a case study and perspective review[J]. INTERNATIONAL GEOLOGY REVIEW,2018,60(11-14):1361-1380.
APA Xie, Jiancheng,Wang, Yu,Li, Quanzhong,Yan, Jun,&Sun, Weidong.(2018).Petrogenesis and metallogenic implications of Late Mesozoic intrusive rocks in the Tongling region, eastern China: a case study and perspective review.INTERNATIONAL GEOLOGY REVIEW,60(11-14),1361-1380.
MLA Xie, Jiancheng,et al."Petrogenesis and metallogenic implications of Late Mesozoic intrusive rocks in the Tongling region, eastern China: a case study and perspective review".INTERNATIONAL GEOLOGY REVIEW 60.11-14(2018):1361-1380.
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