Chemical compositions of garnet and clinopyroxene and their genetic significances in Yemaquan skarn iron-copper-zinc deposit, Qimantagh, eastern Kunlun

doi:10.1016/j.gexplo.2015.07.011

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Chemical compositions of garnet and clinopyroxene and their genetic significances in Yemaquan skarn iron-copper-zinc deposit, Qimantagh, eastern Kunlun
	Zuo, Pengfei 1; Liu, Xuefei 1; Hao, Jinhua 2; Wang, Yashuai 1; Zhao, Rui 1; Ge, Songsheng 3
刊名	JOURNAL OF GEOCHEMICAL EXPLORATION
	2015-11-01
卷号	158 页码:143-154
关键词	Skarn iron-copper-zinc deposit Prograde skarns Skarn zonation Mineralization zonation Yemaquan
DOI	10.1016/j.gexplo.2015.07.011
文献子类	Article
英文摘要	The Yemaquan skarn deposit in the northwestern part of the Qimantagh is located in the eastern Kunlun orogenic belt. The deposit is hosted in carbonate rocks, siltstones, and sandstones of the Cambrian-Ordovician Tanjianshan Group and Late Carboniferous Di'aosu Formation. These rocks are intruded by Triassic calc-alkaline granitoid that extended NW-SE. Three stages of mineralization have been identified, i.e., pre-ore stage, syn-ore stage, and post-ore stage. The prograde skam stage, which corresponds to the pre-ore stage, is dominated by clinopyroxene and garnet. Clinopyroxene is much more abundant than garnet in the deposit and consists of three types of clinopyroxene in the deposit. In terms of the end-members diopside (CaMgSi2O6), hedenbergite (CaFeSi2O6), and johannsenite (CaMnSi2O6), namely, type I (with an average composition of Di(92)Hd(7)Joh(1)) type II (with an average of composition of Di(62)Hd(36)Joh(2)), and type III (with an average composition of Di(24)Hd(54)Joh(22)) occurred from the proximal intrusions to the distal wall rocks. Type I, II, and III clinopyroxenes are associated with copper-iron, iron, and zinc-lead mineralization, respectively. Garnet mostly occurred in the middle of exoskarn zonations and is associated with type II dinopyroxene. The distribution of the garnet in the skarn zonation could be explained by the stability fields of dinopyroxene, which is strongly dependent on composition. Based on mineral assemblages, the formation of type II and type III, comparative to type I clinopyroxene, is in more reduced condition in the distal skarn. Moreover sulfur isotope carried out on sulfide minerals from both the prograde and retrograde stages show a variable and wide range of delta S-34 values (-6.9 to 4.2%. delta S-34), suggesting that the skarn-forming fluid may have been affected by the reduced wall rocks. The low garnet/clinopyroxene ratios observed at the deposit might be caused by the dinopyroxene composition variations and reduced wall rocks. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词	CAMPIGLIA MARITTIMA SKARN ; LATE TRIASSIC GRANITOIDS ; QINGHAI-TIBET PLATEAU ; RARE-EARTH-ELEMENTS ; GOLD DEPOSIT ; HYDROTHERMAL SYSTEMS ; STABILITY RELATIONS ; METALLOGENIC MODEL ; CU MINERALIZATION ; FLUID INCLUSIONS
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000361410900013
资助机构	National Basic Research Program(2015CB452600) ; National Basic Research Program(2015CB452600) ; National Natural Science Foundation of China(41202061 ; National Natural Science Foundation of China(41202061 ; 41302043) ; 41302043) ; National Basic Research Program(2015CB452600) ; National Basic Research Program(2015CB452600) ; National Natural Science Foundation of China(41202061 ; National Natural Science Foundation of China(41202061 ; 41302043) ; 41302043)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62234]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 2.China Univ Geosci, Acad Sci, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zuo, Pengfei,Liu, Xuefei,Hao, Jinhua,et al. Chemical compositions of garnet and clinopyroxene and their genetic significances in Yemaquan skarn iron-copper-zinc deposit, Qimantagh, eastern Kunlun[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2015,158:143-154.
APA	Zuo, Pengfei,Liu, Xuefei,Hao, Jinhua,Wang, Yashuai,Zhao, Rui,&Ge, Songsheng.(2015).Chemical compositions of garnet and clinopyroxene and their genetic significances in Yemaquan skarn iron-copper-zinc deposit, Qimantagh, eastern Kunlun.JOURNAL OF GEOCHEMICAL EXPLORATION,158,143-154.
MLA	Zuo, Pengfei,et al."Chemical compositions of garnet and clinopyroxene and their genetic significances in Yemaquan skarn iron-copper-zinc deposit, Qimantagh, eastern Kunlun".JOURNAL OF GEOCHEMICAL EXPLORATION 158(2015):143-154.