地质找矿论丛2024，Vol.39Issue(4)：469-477,9.DOI:10.6053/j.issn.1001-1412.2024.04.003
南秦岭龙头沟金矿床石英Rb-Sr同位素测年及其地质意义
Rb-Sr age dating of quartz from Longtougou Au deposit in South Qinling area and the geological significance
摘要
Abstract
Iongtougou Au deposit is located in the central Zhashui-Shanyang Au deposit-clustered area.It is tectonically controlled and hosted by barite-quartz vein and forms a major Au ore belt together with Wutiaogou and Kuanpinggou Au deposits discovered in the surrounding in resent years.Making clear of ore-forming ages will expand exploration targets.Rb-Sr age dating is conducted on fluid inclusion of quartz.The result shows that the Au deposit are resulted from late Indo-China hydrothermal activity.The ore-forming process started from about 266 Ma.The age dating of Wutiaogou Au deposit is 249 Ma±42 Ma.Along Shanfeng fault took place three major tectonic-magnetic hydrothermal activities since Hercynian epoch with rock-forming and ore-forming stages of 280 Ma-300 Ma,200 Ma-220 Ma and 140 Ma-160 Ma.The abundant hydrothermal fluid and intense hydrothermal activity provided not only huge volume of ore materials from depth but also controlled directly epoches and intensity and over printing of mineralization.Similar to other large Au deposits Longtougou Au deposit is the result of tectonic move-ment from Indo-China to early Yanshanian period representing Au ore-forming process in Indo-China period.关键词
龙头沟金矿床/石英流体包裹体Rb-Sr同位素/印支期/南秦岭成矿时代Key words
Longtougou Au deposit/Rb-Sr isotopes of quartz fluid inclusion/Indo-China epoch/ore-forming periods in South Qinling area分类
天文与地球科学引用本文复制引用
刘新伟,薛玉山,寸小妮..南秦岭龙头沟金矿床石英Rb-Sr同位素测年及其地质意义[J].地质找矿论丛,2024,39(4):469-477,9.基金项目
西安西北有色地质研究院有限公司科研项目(编号:2021J02 （）
2023J02)资助. 本文为西安西北有色地质研究院有限公司科研项目(2017J02)部分研究成果,项目在实施过程中受到张云峰总经理、胡西顺总工程师等大力支持,山阳纵横矿业公司雷永康总经理、权斌副总经理等在样品采集过程中提供了帮助,在此一并表示感谢. （2017J02）
