Geochronology,petrogenesis,and geological significance of the quartz vein-type copper deposits in Longwei area,north-west Dayaoshan,Guangxi

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Quartz-vein-type copper deposits were discover-ed in SN-trend ore-bearing structures in north-west Dayaoshan,Guangxi.Lack of reports on the precise metallogenic age of these deposit has become a bottleneck in metallogenic research in this area.In this study,the quartz vein-type copper mine in Longwei area of Jinxiu was selected as the research object.Fresh illite samples in the fault gouges and ore samples were collected for testing and analysis.Based on the Re-Os isotope dating study,the age of pyrite isochron,belonging to the Caledonian period,was determined to be 417±25 Ma,whereas that of chalcopyrite isochron belonging to the Indosinian period,was found to be 243±18 Ma.Pyrite crystallized consi-derably earlier than chalcopyrite.The obtained EPMA data were combined with rock mineralogical analysis data,Metasomatous mineral pyrite and metasomatic mineral chalcopyrite were identified to have originated from different hydrothermal systems.In the Indosinian period,copper deposits in the Longwei area underwent pyrite crys-tallization,pyrite fragmentation,copper-bearing hydro-thermal filling,and metasomatism,consolidating and forming minerals.The study determined the mineralisation time and ore sources of copper deposits in the Longwei area.The study provides evidence for the existence of Indosinian hydrothermal activities in the north-western Dayaoshan area.

外文关键词：

Re-Os datingelectron probemicro-analyserquartz-vein copper depositDayaoshan area

作者：

Song FU、Shehong LI、Changxing LV、Longqing SHI、Xuhan HU、Jinming WU、Zhuolin XIE

展开 >

作者单位：

College of Earth Sciences & Engineering,Shandong University of Science and Technology,Qingdao 266590,China

School of Earth Sciences,Guilin University of Technology,Guilin 541006,China

Xinwen Mining Group Co.,Ltd.Huafeng Coal Mine,Tai'an 271409,China

基金：

Natural Science Foundation of Shandong ProvinceNatural Science Foundation of Shandong ProvinceNational Natural Science Foundation of China

项目编号：

ZR2020KE023ZR2021MD05742002282

出版年：

2024

DOI：

10.1007/s11707-022-1013-2

地球科学前沿

高等教育出版社

地球科学前沿

CSTPCD

影响因子：0.585

ISSN：2095-0195

年,卷(期)：2024.18(1)