Petrogenesis of Early Cretaceous adakites in Tongguanshan Cu-Au polymetallic deposit, Tongling region, Eastern China

doi:10.1016/j.oregeorev.2020.103717

	Petrogenesis of Early Cretaceous adakites in Tongguanshan Cu-Au polymetallic deposit, Tongling region, Eastern China
	Jiang, Xiao-Yan 1; Deng, Jiang-Hong 2,3; Luo, Jin-Cheng 1; Zhang, Li-Peng 2,3; Luo, Ze-Bin 4,5; Yan, Hai-Bo 4,5; Sun, Wei-Dong2,3,4
	2020-11-01
发表期刊	ORE GEOLOGY REVIEWS
ISSN	0169-1368
卷号	126 页码:17
通讯作者	Jiang, Xiao-Yan([email protected]) ; Zhang, Li-Peng([email protected])
摘要	Adakites are closely related to Cu-Au deposits in many regions worldwide. The petrogenesis of the Early Cretaceous adakites in the Lower Yangtze River Belt (LYRB) of East China and their genetic relationship with Cu-Au polymetallic mineralization are still debated. The Tongguanshan (TGS) pluton is representative of the adakitic intrusions in the Tongling region and is composed of granodiorite and quartz monzodiorite, and contains quartz monzodiorite enclaves. Zircons from the granodiorite yield a SIMS U-Pb crystallization age of 136.7 +/- 1.4 Ma, which suggests that the Cretaceous magmatism is related to the mineralization. The host rocks and enclaves have SiO2 contents of 61.2-65.3 wt% and 54.9-58.0 wt%, respectively. Both the host rocks and the enclaves are characterized by high Al2O3 and Sr, and low Y and Yb contents, as well as high Sr/Y and (La/Yb)(N) ratios, which are typical geochemical characteristics of adakites, and they can be further divided into high-silica (host rock) and low-silica (enclave) adakites. The large range of epsilon(Hf)(t) and delta O-18 values of the host rocks (-11.6 to - 21.9, 6.8 parts per thousand-7.6 parts per thousand, respectively) and of the enclaves (-13.8 to - 23.6, 6.9 parts per thousand-7.3 parts per thousand, respectively), suggest an enriched and heterogeneous source. The host rocks and enclaves have similar Sr-Nd isotopic compositions (epsilon(Nd)(t) = -9.73 to -11.4, I-Sr = 0.7068 to 0.7073), which are intermediate among those of MORB, marine sediment, and the Yangtze lower crust. Whole-rock element ratios suggest that the host rocks were generated by the partial melting of subducted oceanic crust mixed with sediments, followed by assimilation of the lower crust. In contrast, the enclaves were derived from partial melting of enriched mantle metasomatized by slab-derived melts. Magma mixing, crustal contamination, and metasomatism play roles in generating the geochemical variations in the TGS adakites. The high oxygen fugacity and high contents of slab-derived volatiles suggested by apatites are favorable for large-scale Cu mineralization in the Tongling area, LYRB.
关键词	Adakite Geochemistry Cu-Au mineralization Tongguanshan deposit Tongling
DOI	10.1016/j.oregeorev.2020.103717
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2016YFC0600408]; National Natural Science Foundation of China[41703010]; CAS 'Light of West China' Program; Taishan Scholar Program of Shandong[ts201712075]; AoShan Talents Cultivation Program[2017ASTCP-OS07]
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geology ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:000588610900001
出版者	ELSEVIER
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/169061
专题	深海极端环境与生命过程研究中心
通讯作者	Jiang, Xiao-Yan; Zhang, Li-Peng
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Deep Sea Res, Ctr Ocean Megasci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China
通讯作者单位	中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Jiang, Xiao-Yan,Deng, Jiang-Hong,Luo, Jin-Cheng,et al. Petrogenesis of Early Cretaceous adakites in Tongguanshan Cu-Au polymetallic deposit, Tongling region, Eastern China[J]. ORE GEOLOGY REVIEWS,2020,126:17.
APA	Jiang, Xiao-Yan.,Deng, Jiang-Hong.,Luo, Jin-Cheng.,Zhang, Li-Peng.,Luo, Ze-Bin.,...&Sun, Wei-Dong.(2020).Petrogenesis of Early Cretaceous adakites in Tongguanshan Cu-Au polymetallic deposit, Tongling region, Eastern China.ORE GEOLOGY REVIEWS,126,17.
MLA	Jiang, Xiao-Yan,et al."Petrogenesis of Early Cretaceous adakites in Tongguanshan Cu-Au polymetallic deposit, Tongling region, Eastern China".ORE GEOLOGY REVIEWS 126(2020):17.

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