地质通报2017，Vol.36Issue(7)：1147-1157,11.
东昆仑它温查汉西花岗闪长斑岩年代学、岩石学、地球化学特征及其成矿意义
Chronological, petrologic and geochemical characteristics of Tawenchahanxi granitic diorite porphyry in East Kunlun Mountains and its metallogenic significance
摘要
Abstract
The Tawenchahanxi Fe-polymetallic deposit is another typical skarn type deposit newly discovered in the Qimantag metallogenic belt of East Kunlun Mountains. Using LA-ICP-MS zircon U-Pb isotope dating, the authors obtained the petrogenetic age of the granitic diorite porphyry (236.0±2.3Ma.) which is the main ore-forming rock mass in the mine. The result is in agreement with previous isochron age of 229.9±3.5Ma of the muscovite separated from skarn magnetite ore by the 40Ar-39Ar incremental heat?ing method. Petrologic and geochemical data indicates that it is a peraluminous granite and belongs to the I type high K calc-alkaline series, enriched in LREE and HFSE but depleted in HREE and LILE. The rare earth patterns of rocks/chondrite show medium nega?tive Eu anomalies. In addition, the diorite porphyry might have been formed at the collision-post collision stage of Late Paleozoic to Early Mesozoic tectono-magmatic cycle, which was also related to regional large-scale mantle magma underplating and crust-mantle magma mixing.关键词
矽卡岩型/I型/碰撞-后碰撞阶段/它温查汉西铁多金属矿床/东昆仑Key words
skarn type/I type/collision-post collision stage/Tawenchahanxi Fe-polymetallic deposit/East Kunlun Mountains分类
天文与地球科学引用本文复制引用
杨涛,姜安定,詹小弟,王宇,赵辛敏,张洲远,杜亚龙,李智明,宋忠宝,张乐,张斌,王晓鹏..东昆仑它温查汉西花岗闪长斑岩年代学、岩石学、地球化学特征及其成矿意义[J].地质通报,2017,36(7):1147-1157,11.基金项目
中国地质调查局项目《青海省岩浆岩时空分布与成矿作用研究》(编号:1212011121089) （编号:1212011121089）
