中国地质Issue(1)：149-168,20.
内蒙古宝音图钼矿成矿岩体地球化学、年代学及成因研究
Geochemistry, geochronology and petrogenesis of the ore-forming intrusive body in the Baoyintu molybdenum deposit, Inner Mongolia
摘要
Abstract
The Baoyintu molybdenum deposit in Inner Mongolia is a large porphyry quartz vein type molybdenum deposit discovered in the northern part of the Langshan Mountain, and the ore-forming intrusive body consists of plagiogranite, monzogranite, moyite and acidic fine-grained porphyry stock. The LA-ICP-MS U-Pb upper intercepting age is 2400 Ma, <br> suggesting that the granite was derived from late Archean to early Proterozoic crustal rocks. Zircon LA-ICP-MS U-Pb dating shows that the ore-forming intrusive body was formed at four stages in the Indosinia period, i.e., (225.9±4.4) Ma-(237.5±5.9) Ma, (236.8±4.5) Ma-(244.3±4.2) Ma, (247.5±4.4) Ma and (252.1±3.4) Ma-(258.8±3.3) Ma;the isotopic ages imply that each stage of magma intrusion lasted for a long time, and the intervals between various stages of invasion were short. Elements at different stages of magmatic intrusion underwent some differentiation, the chemical composition of various stages of rocks shows oversaturated aluminum, potassium-rich features, with late aplite K2O/Na2O being the highest, and K2O and CaO being inversely correlated with each other. A comparison with Sr/Ba-Zr/Y ratios of major magmatic belts in the world shows that it is different from the oceanic crust melt, granite, consistent with the Yanshan belt, Qinling belt magmatic rocks, and close to Proterozoic metamorphic country rocks in geochemical characteristics. These features indicate that mineralized granites are genetically continental crust melt S-type granites.关键词
成矿花岗岩/锆石LA-ICP-MS U-Pb年龄/岩石化学/花岗岩成因Key words
mineralized granites/zircon LA-ICP-MS U-Pb ages/rocks/granite genesis分类
天文与地球科学引用本文复制引用
刘敬党,梁帅,肖荣阁,张艳飞..内蒙古宝音图钼矿成矿岩体地球化学、年代学及成因研究[J].中国地质,2015,(1):149-168,20.基金项目
国家自然科学基金项目（40073013）、内蒙古自治区地质矿产勘查开发局勘查项目（NMKD200801）联合资助。About the corresponding author：LIANG Shuai, male, born in 1986, doctor, engages in the study of geochemistry and mineral deposits （）
E-mail:ls476476@163.com （）
