地质与勘探2011，Vol.47Issue(5)：737-747,11.
内蒙古敖仑花斑岩型钼铜矿床地质特征及成因探讨
Geological Characteristics and Genesis of the Aolunhua Porphyry Mo-Cu Deposit,Inner Mongolia
摘要
Abstract
The Aolunhua mine is a large-scale porphyry Mo-Cu deposit newly discovered in recent years.The molybdenum mineralization of this deposit occurs primarily within the Aolunhua porphyritic granitoid stock and hornfelsed in the outer contact zone,which are veins,veinlets and disseminated blocks.The ore mineral consists of molybdenite,chalcopyrite,pyrite,sphalerite,and galena.The major elements of the Aolunhua rock show high SiO2、Al2O3、K、Na contents,with ratio of Na2O/K2O between 1.1～2.1,the value of σ between 3～3.7,and the ratio of A/CNK less than 1（0.68～0.82）.The lithology of Aolunhua rock is granodiorite-porphyry,belongs to Na-rich and K-high calc-alkaline rock series.Hydrothermal alterations in Aolunhua roughly shows zonation of quartz-K feldspathization,quartz-sericite,hornfelsed.Of these alterations,the overprinting zone of quartz-K feldspathization and quartz-sericite are well developed and have intimate relationship with molybdenum mineralization.Fluid inclusion study shows that the ore-forming fluid has high mineralization temperature and salinity.The variation range of δ34S from sulphide in the deposit is small,between-1.2‰～3.5‰ and average value is 1.78‰.Characteristics of mineral deposit geochemistry,field geological observations and petrological evidence suggest that the Aolunhua deposit is a porphyry type hypothermal-mesothermal molybdenum deposit.Evolution of magmatic and sulfur isotope show that mineralization is closely related to acidic porphyry and affected by mantle-derived magma mixing.关键词
斑岩型钼铜矿床/地质特征/敖仑花/内蒙古Key words
porphyry Cu-Mo deposit/geologic characteristics/Aolunhua/Inner Mongolia分类
天文与地球科学引用本文复制引用
邹滔,王京彬,王玉往,袁继明,林龙军,窦金龙,蒋炜,李伟,马星华..内蒙古敖仑花斑岩型钼铜矿床地质特征及成因探讨[J].地质与勘探,2011,47(5):737-747,11.基金项目
国家重点基础研究发展计划“973”项目（编号2007CB411304 2002CB409806）资助成果 （）
