矿床地质2013，Vol.32Issue(1)：207-216,10.
新疆祁漫塔格柯可卡尔德钨锡矿床控矿构造及40Ar-39Ar年代学研究
Ore-controlling structure and 40Ar-39Ar geochronology of Kekekaerde tungsten-tin deposit in Qimantag area, Xinjiang
摘要
Abstract
The Baiganhu W-Sn orefield, in the western part of the Qimantage mountains, eastern Kunlun orogenic belt, is the most recently discovered, large, W-Sn discovery in Xinjiang Uygur Autonomous Region, NW China. The orefield comprises four W-Sn ore deposits: Kekekaerde, Baiganhu, Bashierxi and Awaer. Of them, the Kekekaerde W-Sn deposit is largest and has highest exploration intensity. In this study, based on detailed field geological investigation, the ore-controlling structures and age determination on W-Sn ores have been carried out. The results show us that intensive and multi-stage structural activites had took place. They are, from early to late, right-lateral shear structure at pre-metallogenic stage, NE-striking predominately tenso-shear structure at metallogenic stage and nearly SN-striking normal fault at post-metallogenic stage. The 40Ar-39Ar incremental heating method was used to date, the results yield a40Ar-39Ar plateau age of (411.7±2.6) Ma and an isochron age of (411.8 ± 4.7) Ma with MSWD being 0.21 for muscovite separated from strongly greisenized W-Sn mineralization granite, a 40Ar-39Ar plateau age of (412.8 + 2.4) Ma and an isochron age of (414.6 ±3.9) Ma with MSWD being 0.22 for muscovite separated from quartz-wolframite vein with muscovite vertically growing along both walls of quartz vein, respectively. It is shown that the Kekekaerde W-Sn deposit was formed at late Silurian, corresponding to post-collisional stage during Caledonian tectonic cycle in eastern Kunlun area.关键词
地质学/地球化学/钨锡矿床/控矿构造/40Ar-39Ar同位素测年/柯可卡尔德/白干湖矿田/东昆仑祁漫塔格地区Key words
geology, geochemistry, tungsten-tin deposit, ore-controlling structure, 40Ar-39Ar isotopic dating, Kekekaerde, Baiganhu orefield, Qimantag area, eastern Kunlun分类
天文与地球科学引用本文复制引用
丰成友,李国臣,李大新,周安顺,李洪茂..新疆祁漫塔格柯可卡尔德钨锡矿床控矿构造及40Ar-39Ar年代学研究[J].矿床地质,2013,32(1):207-216,10.基金项目
本文得到国家自然科学基金项目(批准号:41172076)、中国博士后科学基金项目(编号:20090460132)、中国地质调查局地质调查项目(1212011085528)和中国地质调查局青年地质英才计划(201112)的联合资助 （批准号:41172076）
