摘要
太平沟钼矿床为大兴安岭地区新发现的斑岩型钼矿床。本文的同位素地质年代学研究获得获得含矿的蚀变二长花岗斑岩的钾长石^(40)Ar-^(39)Ar等时线年龄为127.5±4Ma,花岗斑岩锆石SHRIMP U-Pb年龄为131.5±1.1Ma,矿体辉钼矿Re-Os等时线年龄为129.4±3.9Ma,表明斑岩成矿系统形成于131.5～127.5Ma,与早白垩世区域性燕山期大规模构造-岩浆事件一致。
The Taipinggou porphyry molybdenum deposit was recently discovered in the Da Hinggan Mountain,China. Our geochronological study of ore-bearing porphyries and orebodies yields a K-feldspar ^(40)Ar-^(39)Ar isochron age of 127.5±4Ma for the ore-bearing,altered adamellite porphyry,a SHRIMP zircon U-Pb age of 131.5±1.1Ma for the ore-bearing granite porphyry,and a molybdeniteRe-Os isochron age of 129.4±3.9Ma for the orebodies.This suggests that the molybdenum mineralization occurred in a period of 131.5～127.5Ma;a...
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第11期2913-2923,共11页
Acta Petrologica Sinica
基金
国家重点基础研究发展规划项目(2006CB403500)
内蒙古太平沟铜钼矿勘查项目(H90004)
高等学校学科创新引智计划(B307011)资助
