In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny

doi:10.1016/j.chemgeo.2019.02.010

GIG OpenIR

	Sun, Sai-Jun 1,2,8; Yang, Xiao-Yong 3; Wang, Guang-Jie 4; Sun, Wei-Dong 1,2,5,8,9; Zhang, Hong 7; Li, Cong-Ying 1,2,8; Ding, Xing 5,6
	In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny
刊名	CHEMICAL GEOLOGY
ISSN号	0009-2541
	2019-04-05
卷号	510 页码:200-214
DOI	10.1016/j.chemgeo.2019.02.010
语种	英语
WOS研究方向	Geochemistry & Geophysics
摘要	Apatite as an excellent tracer of the magmatic and metallogenic processes, can incorporate large amounts of trace elements sensitive to melting and/or ore-fluid evolution. This paper reports a combined study of in situ apatite geochemistry and whole-rock geochemistry for Early Cretaceous ore-bearing (Group I) and ore-barren porphyries (Group II) in the Liguo Fe-Cu-Au deposit for the deciphering of its petrogenesis and the control factors of mineralization. The apatite from both Group I and Group II is magmatic fluorapatite, characterized by Eu negative anomalies, an enrichment of LREEs, and a depletion of HREEs. Meanwhile, both groups have high Sr/Y and delta Eu, indicating porphyry adakitic characteristics in origin. Compared to isotopes of whole rocks, the variable Sr-87/Sr-86 (0.70250-0.71262) and delta O-18 (6.22-9.00) values of both groups of apatite imply contributions of mantle-, crust- and/or sediment-derived materials. Although Group I apatite and II apatite show some similar geochemical characteristics, Group I apatite precedes the crystallization of plagioclase with no Sr-(La/Yb)(N)/(La/ Sm)(N)/(Sm/Yb)(N) correlations, whereas Group II apatite coincides with plagioclase crystallization, displaying positive correlations. The geochemistry of the elements (delta Eu, delta Ce, MnO and V) of these apatite groups, which are sensitive to a redox state, shows high oxygen fugacity (between HM and NNO), and Group I apatite has systematically higher oxygen fugacity than Group II apatite. More importantly, these different trace elements and oxygen fugacity characteristics between Group I apatite and Group II apatite can be used as an indicator of mineralization, and allow the skarn Fe-Cu-Au mineralization range to be drawn for the first time. Furthermore, the estimated F and Cl contents of the host parent magma (F = 1300-2446 ppm, Cl = 140-4780 ppm) are higher than those in a primitive mantle and average continental crust, suggesting an enrichment process of F and Cl. According to the above adakitic characteristics, high oxygen fugacity, and high F and Cl contents, the Pacific Plate subduction may be the main dynamic mechanism of the diagenesis and mineralization found in Liguo.
关键词	Apatite In situ Sr-O isotopes Petrogenetic-metallogenic features Xu-Huai area North China Craton
WOS记录号	WOS:000461318500016
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/344008/52297
通讯作者	Li, Cong-Ying; Ding, Xing
作者单位	1.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China 7.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China 8.Chinese Acad Sci, Ctr Ocean Mega Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 9.Univ Chinese Acad Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Sun, Sai-Jun,Yang, Xiao-Yong,Wang, Guang-Jie,et al. In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny[J]. CHEMICAL GEOLOGY,2019,510:200-214.
APA	Sun, Sai-Jun.,Yang, Xiao-Yong.,Wang, Guang-Jie.,Sun, Wei-Dong.,Zhang, Hong.,...&Ding, Xing.(2019).In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny.CHEMICAL GEOLOGY,510,200-214.
MLA	Sun, Sai-Jun,et al."In situ elemental and Sr-O isotopic studies on apatite from the Xu-Huai intrusion at the southern margin of the North China Craton: Implications for petrogenesis and metallogeny".CHEMICAL GEOLOGY 510(2019):200-214.