The multiple granitic magmatism in the giant Huayangchuan uranium polymetallic ore district: Implications for tectonic evolution of the southern margin of North China Craton in the Qinling Orogen

doi:10.1016/j.oregeorev.2019.103055

GIG OpenIR

	Yang, Chunsi 1,2; Zhao, Liandang 3; Zheng, Hui 1,2; Wang, Dequan 4
	The multiple granitic magmatism in the giant Huayangchuan uranium polymetallic ore district: Implications for tectonic evolution of the southern margin of North China Craton in the Qinling Orogen
刊名	ORE GEOLOGY REVIEWS
ISSN号	0169-1368
	2019-09-01
卷号	112 页码:21
DOI	10.1016/j.oregeorev.2019.103055
语种	英语
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
摘要	The giant Huayangchuan U-Nb-Pb deposit in the Qinling Orogen is a newly verified carbonatite-hosted deposit in the southern margin of the North China Craton (NCC), central China. Granitic magmatism is extensively developed in the Huayangchuan deposit area, but their ages and petrogenesis are not well constrained. The exposed granitic rocks are mainly biotite monzogranite porphyry, granite pegmatite, granodiorite, and biotite monzogranite with zircon U-Pb ages of 1808 +/- 10 Ma, 1807 +/- 14 Ma, 233 +/- 1.4 Ma, and 132 +/- 0.6 Ma, respectively. The Paleoproterozoic biotite monzogranite porphyry belongs to shoshonite and metaluminous series, showing enrichment of LREE and LILE and depletion of HREE and HFSE, with high Zr + Y + Nb + Ce values and Ga/Al ratios, which are consistent with A-type granite. Whereas, the contemporaneous granite pegmatite dykes with weak mineralization are also cala-alkaline to shoshonite and peraluminous series, enriched in Rb, Ba, and LREE, and depleted in Nb, Ta, Ti and HREE. The shoshonite and weakly peraluminous Triassic granodiorite is slightly enriched in LREE with flat HREE patterns, enriched in Ba and Sr and depleted in Nb, Ta, P, and Ti, with similar geochemical characteristics to adakite-like rocks. The Early Cretaceous biotite monzogranite is characterized by LREE enrichment and flat HREE patterns, belonging to shoshonite and metaluminous to weakly peraluminous I-type granite, with U and LILE enrichment, and HFSE-depleted. The high initial Sr-87/Sr-86 ratios and enriched Nd (epsilon(Nd)(t) = -17.5 to -17.1) and epsilon(Hf) (t) = -33.2 to -14.6) isotopes reveal that the Huayangchuan granitic rocks are obviously sourced from crustal-derived magmas. Combined with regional geology and this study, we proposed that: (1) the Paleoproterozoic biotite monzogranite porphyry and granite pegmatite were generated from ancient lower crust during post-collisional extension setting; (2) the granodiorite was likely sourced from partial melting of thickened lower crust with pelagic sediments materials addition during the Triassic although the mineralization-related carbonatite having similar age with granodiorite may derive from mantle; and (3) the Early Cretaceous biotite monzogranite was mainly sourced from the partial melting of lower crust induced by the underplating of the mafic magma. We suggest that the first phase of magma occurred in the Huayangchuan district during the Paleoproterozoic following the amalgamation of the Eastern and Western blocks along the Trans-North China Orogen. Since the Mesozoic, the ongoing northward subduction of the Yangtze Craton (YZC) resulted in the crust thickening, developing the Triassic granitic magmatism and major mineralization associated with carbonatite. The widespread Cretaceous granite and deposit in the southern margin of NCC indicate that intracontinental extension and lithospheric thinning occurred in response to the tectonic regime transition from NS-trending to EW-trending subduction.
关键词	Granitic magmatism Geochemistry Sr-Nd-Hf isotopes Qinling Orogen Huayangchuan U-Nb-Pb deposit
WOS记录号	WOS:000487168100019
收录类别	SCI
引用统计
文献类型	期刊论文
条目标识符	http://ir.gig.ac.cn/handle/344008/47477
通讯作者	Zhao, Liandang
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Changan Univ, Sch Earth Sci & Resources, 126 Yanta Rd, Xian 710054, Shaanxi, Peoples R China 4.Sino Shaanxi Nucl Ind Grp, Xian 710100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Yang, Chunsi,Zhao, Liandang,Zheng, Hui,et al. The multiple granitic magmatism in the giant Huayangchuan uranium polymetallic ore district: Implications for tectonic evolution of the southern margin of North China Craton in the Qinling Orogen[J]. ORE GEOLOGY REVIEWS,2019,112:21.
APA	Yang, Chunsi,Zhao, Liandang,Zheng, Hui,&Wang, Dequan.(2019).The multiple granitic magmatism in the giant Huayangchuan uranium polymetallic ore district: Implications for tectonic evolution of the southern margin of North China Craton in the Qinling Orogen.ORE GEOLOGY REVIEWS,112,21.
MLA	Yang, Chunsi,et al."The multiple granitic magmatism in the giant Huayangchuan uranium polymetallic ore district: Implications for tectonic evolution of the southern margin of North China Craton in the Qinling Orogen".ORE GEOLOGY REVIEWS 112(2019):21.