Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China

doi:10.3390/min8100429

GIG OpenIR

	Wei, Wenfeng 1,2; Lai, Chunkit 3,4; Yan, Bing 1; Zhu, Xiaoxi 1; Song, Shengqiong 5; Liu, Lei 2
	Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China
刊名	MINERALS
ISSN号	2075-163X
	2018-10-01
卷号	8 期号:10 页码:22
DOI	10.3390/min8100429
语种	英语
WOS研究方向	Mineralogy ; Mining & Mineral Processing
摘要	The newly discovered Shimensi deposit is a super-large tungsten-copper (W-Cu) deposit with a metal reserve of 742.55 thousand tonnes (kt) W and 403.6 kt Cu. The orebodies are hosted in Mesozoic granites, which intruded the poorly documented Shimensi granodiorite belonging to the Jiuling batholith, the largest intrusion (outcrop > 2500 km(2)) in South China. Our new SHRIMP (Sensitive High Resolution Ion MicroProbe) zircon dating revealed that the granodiorite at Shimensi (ca. 830-827 Ma) was formed coeval (within analytical uncertainty) or slightly earlier than those in many other places (ca. 819-807 Ma) of the Jiuling batholith. The Neoproterozoic Shimensi granodiorite is peraluminous and high-K calc-alkaline, and contains low P content with no S-type trend (positive P2O5 vs. SiO2 correlation) displayed, thus best classified as peraluminous I-type. The I-type classification is also supported by the zircon REE patterns, largely (93%) positive epsilon Hf(t) (-0.87 to 6.60) and relatively low delta O-18 (5.8-7.7 parts per thousand). The Neoproterozoic Shimensi granodiorite was formed after the continental arc magmatism (ca. 845-835 Ma), but before the post-collisional S-type granite emplacement (ca. 825-815 Ma) in the Jiangnan Orogen. Therefore, we propose that the Shimensi granodiorite was formed in a collisional/early post-collisional setting. The delta O-18 increase from the Shimensi granodiorite to many younger (ca. 819-807 Ma) granodiorites (6.0-8.5 parts per thousand) in the Jiuling batholith probably reflects an increase of supracrustal rock-derived melts with the progress of collision. The Shimensi granodiorite contains low zircon Ce4+/Ce3+ and Eu/Eu*, suggesting a relatively reducing magma that does not favor porphyry Cu-Au mineralization. This left a high background Cu concentration (avg. 196 ppm) in the Neoproterozoic granodiorite, which may have contributed to the Mesozoic W-Cu mineralization, when the granodiorite is intruded and assimilated by the Mesozoic granites.
关键词	Shimensi W-Cu deposit Neoproterozoic granitoids zircon age and Hf-O isotopes granite petrogenesis Jiangnan orogen (South China)
WOS记录号	WOS:000448567300013
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/344008/40101
通讯作者	Lai, Chunkit
作者单位	1.Chengdu Univ Technol, Inst Earth Sci, Chengdu 610059, Sichuan, Peoples R China 2.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China 3.Univ Tasmania, Ctr Excellence Ore Deposits CODES, Hobart, Tas 7001, Australia 4.Univ Brunei Darussalam, Fac Sci, BE-1410 Gadong, Brunei 5.Guizhou Land Survey & Plan Inst, Guiyang 550005, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Wei, Wenfeng,Lai, Chunkit,Yan, Bing,et al. Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China[J]. MINERALS,2018,8(10):22.
APA	Wei, Wenfeng,Lai, Chunkit,Yan, Bing,Zhu, Xiaoxi,Song, Shengqiong,&Liu, Lei.(2018).Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China.MINERALS,8(10),22.
MLA	Wei, Wenfeng,et al."Petrogenesis and Metallogenic Implications of Neoproterozoic Granodiorite in the Super-Large Shimensi Tungsten-Copper Deposit in Northern Jiangxi, South China".MINERALS 8.10(2018):22.