Knowledge Management System Of Institute of Oceanology, Chinese Academy of Sciences
| Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance | |
Xie, Jiancheng1; Wang, Yu1; Li, Quanzhong1; Liu, Jianmin1; Yan, Jun1; Sun, Weidong2,3,4
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| 2018 | |
| 发表期刊 | INTERNATIONAL GEOLOGY REVIEW
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| ISSN | 0020-6814 |
| 卷号 | 60期号:11-14页码:1435-1452 |
| 通讯作者 | Xie, Jiancheng([email protected]) |
| 摘要 | The Anqing region in Lower Yangtze River metallogenic belt is one of the important Cu polymetal producers in China. The origin of Cu polymetallic deposits in the region is closely related to Early Cretaceous adakitic intrusions. To constrain the petrogenetic and metallogenic significance of the adakitic rocks, a detailed geochronological, geochemical, and Sr-Nd-Pb-Hf isotopic study was performed. The Anqing adakitic rocks (SiO2=57.4-64.2wt.%) consist mainly of quartz monzodiorite, formed at 138.2 +/- 1.7Ma (Mean Standard Weighted Deviation (MSWD)=0.61). They have high MgO, Al2O3, Sr, and low Rb, Y, Yb contents, together with high Sr/Y (50.5-222) and La/Yb (31.9-46.9) ratios. They also show negative whole-rock epsilon(Nd)(t) (-9.8 to -8.5) and zircon epsilon(Hf)(t) (-10.0 to -5.4), and high oxygen fugacity (mainly -17.0 to -8.01) values and radiogenic Pb isotopic compositions with (Pb-206/Pb-204)(i)=17.692-17.884, (Pb-207/Pb-204)(i)=15.413-15.511, and (Pb-208/Pb-204)(i)=37.611-37.943. Coupled with negative Nb-Ta anomalies, low K2O/Na2O ratios (0.39-0.62), and high Mg# values (0.44-0.71), these data suggest the adakitic rocks and associated large-scale Cu-Au mineralization of the Anqing region resulted from partial melting of the high oxidized subducted oceanic crust. Addition of mantle-derived magmas and assimilation of crustal materials during emplacement are also possible. |
| 关键词 | Adakite mantle-derived magma slab-derived (adakitic) magmas Cu-Au mineralization Anqing region |
| DOI | 10.1080/00206814.2017.1362672 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Key R&D Program of China[2016YFC0600404]###2219; National Natural Science Foundation of China[41373045]###2218; National Key R&D Program of China[2016YFC0600404]; National Natural Science Foundation of China[41373045] |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| WOS记录号 | WOS:000443879500006 |
| 出版者 | TAYLOR & FRANCIS INC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/160269 |
| 专题 | 深海极端环境与生命过程研究中心 |
| 通讯作者 | Xie, Jiancheng |
| 作者单位 | 1.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.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 4.Guangzhou Inst Geochem, CAS Key Lab Isotope Geochronol & Geochem, Guangzhou, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Jiancheng,Wang, Yu,Li, Quanzhong,et al. Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance[J]. INTERNATIONAL GEOLOGY REVIEW,2018,60(11-14):1435-1452. |
| APA | Xie, Jiancheng,Wang, Yu,Li, Quanzhong,Liu, Jianmin,Yan, Jun,&Sun, Weidong.(2018).Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance.INTERNATIONAL GEOLOGY REVIEW,60(11-14),1435-1452. |
| MLA | Xie, Jiancheng,et al."Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance".INTERNATIONAL GEOLOGY REVIEW 60.11-14(2018):1435-1452. |
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