地质学报Issue(8)：1549-1560,12.
内蒙古哈达门沟金矿床地质特征及成矿作用探讨
Study on Geological Characteristics and Metallogenesis of the Hadamengou Gold Deposit in Inner Mongolia
摘要
Abstract
Hadamengou large gold deposit inInner Mongolia is one of the important deposit,located in southern margin of Wulashan anticlinorium of Yinshan uplift (west part of the Inner Mongolian earth axis )on the north margin of North China Craton.The gold orebodies mainly lies in the metamorphic rock of Wulashan Group,Archaeozoic erathem.,main ore type include gold-bearing quartz vein type,gold-bearing quartz-potassic feldspar vein type, gold-bearing altered rock type. ore-forming fluid is characterized by intermediate-low temperature(160~300℃),mid-low salinity(5%~15% NaCleq).The gas component of fluid inclusions is dominated by H2 O and CO2 ,The main anions in the liquid composition are Cl- and SO2-4 ,and the cations are Na+,K+ and Ca2+.The sulfur isotope composition of the oreδ 34 S vary from-21.7‰ to 5.4‰,the change range is 27.1‰,average value is -10.6‰,depleted 34S,indicated the sources of ore-forming material are complexity,sulfur isotope composition inherited archean strata,mixed with sulfur in deep-sourced ore-bearing Fluid.Lead isotopic compositions of the ore,single-stage model age,Th/U ratios,μ value vary in a large range, indicated multiple sources characteristics. In plumbotectonic model diagram by Zartman and Doe,the lead isotopic compositions of ore mineral plotted scattered,this demonstrates that the ore lead came from the mixed lead.Hydrogen and oxygen isotopes show that the ore-forming fluid was derived from magmatic and small metamorphic water,Late mixed with meteoric water.molybdenite Re-Os weighted mean age is386.4±2.7Ma and isochron age is 386.6±6.1Ma of the orestone,which show the main metallogenic epoch is early devonian,later multi-phase hydrothermal activity probably superimposed on the early stages.The deposit formed in intracontinental extensional tectonic setting after arc-continental collision.关键词
华北克拉通北缘/金矿床/地质特征/成矿作用/内蒙古哈达门沟Key words
northern margin of North China Craton/gold-molybdenum deposit/geological characteristics/metallogenesis/Hadamengou/Inner Mangolia引用本文复制引用
侯万荣,聂凤军,张纯歌,徐斌,李伟,赵广明,孟建军..内蒙古哈达门沟金矿床地质特征及成矿作用探讨[J].地质学报,2014,(8):1549-1560,12.基金项目
国家重点自然科学基金项目（编号41030421）、危机矿山接替资源找矿项目（编号20089948）和地质矿产调查项目（编号12120113072200）资助的成果。 （）
