岩矿测试2016，Vol.35Issue(1)：108-116,9.DOI:10.15898/j.cnki.11-2131/td.2016.01.017
内蒙古红花尔基钨钼矿云英岩化白云母Ar-Ar定年及其地质意义
Ar-Ar Age of MusCovite from the Greisenization Alteration Zones of the Honghuaerji Tungsten PolymetalliC Deposit, Inner Mongolia, and Its GeologiCal SignifiCanCe
摘要
Abstract
The newly found Honghuaerji tungsten polymetallic deposit is a large scale tungsten deposit in north-east Daxinganling in China. The alteration includes sericitization and greisenization. The metallic minerals are scheelite and molybdenite. These minerals in rock body show the belt characteristics of W in the top and Mo in the bottom. Geological characteristics indicate that it is a high temperature hydrothermal deposit. In order to constrain the timing of hydrothermal activities,Ar-Ar dating of muscovite from the greisenization alteration zones was carried out. The Ar-Ar dating yields an Ar-Ar plateau age of 174. 4 ± 1. 2 Ma and an isochron age of 173. 2 ± 4. 3 Ma. Because greisenization alteration zones and the tungsten( molybdenum)mineralization belt are closely related in space, muscovite,scheelite,and molybdenite may have formed simultaneously. Moreover,the Ar-Ar age of muscovite is in agreement with the Re-Os age of molybdenite(176. 8 ± 2. 2 Ma)within uncertainties,indicating this Ar-Ar age represents the timing of the tungsten and molybdenum hydrothermal mineralization. Combined field geology,U-Pb ages and Re-Os ages indicate this deposit formed the Jurassic period and may be the product of Yanshanian tectonic magmatic activity.关键词
红花尔基钨矿/高温热液型钨多金属矿床/白云母/Ar-Ar定年/大兴安岭中北段/燕山期Key words
Honghuaerji tungsten deposit/high temperature hydrothermal type polymetallic deposit/muscovite/Ar-Ar dating/the mid and north parts of Greater Khingan Range/the Yanshanian分类
天文与地球科学引用本文复制引用
向安平,佘宏全,陈毓川,秦大军,王亚军,韩增光,康永建..内蒙古红花尔基钨钼矿云英岩化白云母Ar-Ar定年及其地质意义[J].岩矿测试,2016,35(1):108-116,9.基金项目
中国地质调查局地质调查项目——大兴安岭关键构造-岩浆-成矿事件研究(1212011120992) （1212011120992）
国家基础科研项目——大兴安岭中北段中生代多金属矿成矿系统研究(2013CB429800) （2013CB429800）
