Polymetallic droplets within trapped globules in a quartz diorite porphyry from Gangcha-Kemo gold deposit, West Qinling orogen, China: Implications for petrogenesis and prospecting

doi:10.1016/j.lithos.2018.12.038

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 > 中国科学院矿产资源研究重点实验室

	Polymetallic droplets within trapped globules in a quartz diorite porphyry from Gangcha-Kemo gold deposit, West Qinling orogen, China: Implications for petrogenesis and prospecting
	Liu, Haiming 1,2; Shen, Junfeng 1; Santosh, M.1,3; Nie, Xiao 1; Li, Jinchun 4; Peng, Zidong 5; Xu, Liwei 1; Wang, Shuhao 1; Du, Baisong 1; Li, Jie 1
刊名	LITHOS
	2019-02-01
卷号	326 页码:446-459
关键词	Polymetallic globules Mineralogy and geochemistry Mineral thermometry Ore prospecting Dewulu intrusion
ISSN号	0024-4937
DOI	10.1016/j.lithos.2018.12.038
英文摘要	As immiscibility in magmas appears most significant in magmatic-hydrothermal processes, studies of magmatic fluid immiscibility should focus on the precipitation of metals. A metallogenic belt along the northern margin of the Western Qinling Belt (China) hosts several porphyry-type Cu-Au deposits. Detailed field investigations reveal that abundant ellipsoidal and sub-spheroidal polymetallic globules exist in a quartz diorite porphyry associated with the Gangcha-Kemo gold deposit, which occurs at the eastern contact of the Dewulu intrusion. To reveal the characteristics and composition of these globules, we present mineralogical and whole-rock major- and trace-element data. The globule formation temperature, which was determined using by chlorite and two-feldspar geothermometers, is estimated at 297-429 degrees C. This temperature is much lower than the host quartz diorite porphyry, which is estimated to be 860-979 degrees C using an amphibole geothermometer. Based on the geochemistry of the globules, their polymetallic droplets, and the host quartz diorite porphyry, we infer immiscible separation from the volatile-rich quartz diorite porphyry and precipitation of the polymetallic droplets within the globules. Rapid migration and condensation of the fluids with limited escape of a fluid phase are inferred, with the globules representing trapped ore-forming elements. We propose that the fluid globules were exsolved from a rising magma carrying abundant ore-forming metals and that the globules with sulfide droplets can be used as an exploration tool for interpreting the genesis of mineralized rocks and related ore deposits. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Science Foundation of China[41730426]
WOS关键词	HIMALAYAN TYPE GRANITE ; XIAHE-HEZUO DISTRICT ; OPEN-SYSTEM BEHAVIOR ; ARC MAGMAS ; ELEVATED-TEMPERATURES ; LIQUID IMMISCIBILITY ; TECTONIC EVOLUTION ; SULFIDE MELT ; WATER-VAPOR ; ORE
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000458942700028
资助机构	National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China ; National Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90675]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者	Shen, Junfeng
作者单位	1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.Univ Laval, Dept Geol & Genie Geol, Quebec City, PQ G1V0A6, Canada 3.Univ Adelaide, Dept Earth Sci, Adelaide, SA 5005, Australia 4.Heli Min Co Ltd, Lanzhou 747000, Gansu, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Liu, Haiming,Shen, Junfeng,Santosh, M.,et al. Polymetallic droplets within trapped globules in a quartz diorite porphyry from Gangcha-Kemo gold deposit, West Qinling orogen, China: Implications for petrogenesis and prospecting[J]. LITHOS,2019,326:446-459.
APA	Liu, Haiming.,Shen, Junfeng.,Santosh, M..,Nie, Xiao.,Li, Jinchun.,...&Liu, Jiajun.(2019).Polymetallic droplets within trapped globules in a quartz diorite porphyry from Gangcha-Kemo gold deposit, West Qinling orogen, China: Implications for petrogenesis and prospecting.LITHOS,326,446-459.
MLA	Liu, Haiming,et al."Polymetallic droplets within trapped globules in a quartz diorite porphyry from Gangcha-Kemo gold deposit, West Qinling orogen, China: Implications for petrogenesis and prospecting".LITHOS 326(2019):446-459.