福建柘荣英山银矿床石英流体包裹体Rb-Sr同位素年龄及其地质意义  

Rb-Sr Isotopic Age of Quartz Fluid Inclusions of Yingshan Silver Deposit in Tuorong County, Fujian province and its Geological Significance

作　　者：雷德利 Lei Deli(Fujian Institute of geological survey,Fuzhou,350013)

机构地区：[1]福建省地质调查研究院,福州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”。

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.

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 

分 类 号：P618.52[天文地球—矿床学]