摘要
柘荣英山银矿床是闽东地区典型的中低温热液充填-交代型矿床,通过对英山银矿的地质背景与矿床特征研究,优选东部矿段Ⅶ主矿体系统采集其成矿石英样品,采用MAT-62型热电离质谱仪进行测试,最终获得成矿石英流体包裹体Rb-Sr同位素年龄为(107.6±2)Ma。通过对区域重要矿床的类比研究,认为闽东火山岩区银多金属矿主要形成于早白垩世晚期,该年龄确定对闽东地区相关成矿系列成矿学时代研究具有重要意义。
Zherong Yingshan silver deposit is a typical medium-low temperature hydrothermal filling-metasomatic deposit in eastern Fujian. Based on the study of geological background and deposit characteristics of Yingshan Silver Deposit, the ore-forming quartz age samples were collected from the No.Ⅶ main ore body system of the eastern ore section, and tested by MAT-62 thermal ionization mass spectrometer. Finally, the Rb-Sr isotopic age of ore-forming quartz fluid inclusions was obtained at(107.6+2)Ma. Analogical study of important regional deposits indicates that the Ag-polymetallic mineralization age in the volcanic rock area of Eastern Fujian was set at the late Early Cretaceous, which filled the gap of the age of this type of Ag-polymetallic deposits in the region, and has important significance for the study of the metallogenic chronology of this series of mineralization in eastern Fujian.
作者
雷德利
Lei Deli(Fujian Institute of geological survey,Fuzhou,350013)
出处
《福建地质》
2020年第1期1-10,共10页
Geology of Fujian
基金
福建省地质勘查专项资金勘查项目,“福建福安-上白石地区矿产远景调查”。
关键词
银矿床
石英流体包裹体
RB-SR同位素
成矿年龄
中低温热液充填-交代型
柘荣英山
silver mine
fluid inclusion
Rb-Sr isotope
metallogenic age
Medium-low temperature hydrothermal filling-metasomatism type
Yingshan area of Zherong county
