Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance

doi:10.1080/00206814.2017.1362672

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	Early Cretaceous adakitic rocks in the Anqing region, southeastern China: constraints on petrogenesis and metallogenic significance
	Xie, Jiancheng 1; Wang, Yu 1; Li, Quanzhong 1; Liu, Jianmin 1; Yan, Jun 1; Sun, Weidong2,3,4
刊名	INTERNATIONAL GEOLOGY REVIEW
	2018
卷号	60 期号:11-14 页码:1435-1452
关键词	Adakite mantle-derived magma slab-derived (adakitic) magmas Cu-Au mineralization Anqing region
ISSN号	0020-6814
DOI	10.1080/00206814.2017.1362672
通讯作者	Xie, Jiancheng(xiejiancheng08@163.com)
英文摘要	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.
资助项目	National Key R&D Program of China[2016YFC0600404] ; National Natural Science Foundation of China[41373045]
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000443879500006
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/160268]
专题	海洋研究所_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.