东天山卡拉塔格矿集区赋矿火山岩地层时代探讨——SHRIMP锆石U-Pb年龄证据  

Discussion on the age of ore-host volcanic strata in the Kalatage ore concentration area,eastern Tianshan:Evidence from SHRIMP zircon U-Pb dating

作　　者：龙灵利[1] 王京彬[1] 王玉往[1] 毛启贵[1] 邓小华[1] 赵路通[1] 孙志远[1] 孙燕[1] 高一涵[1] 

机构地区：[1]北京矿产地质研究院,北京100012

出　　处：《矿产勘查》2016年第1期31-37,共7页Mineral Exploration

基　　金：国家重点基础发展研究计划项目(编号:2014CB440803);国家自然科学基金(编号:41202064;41372102;41572077);中国地调局项目(编号:12120114081701)联合资助

摘　　要：新疆东天山卡拉塔格矿集区内发育有红海(—黄土坡)大型VMS型铜锌矿床、红石—梅岭热液脉状铜矿床、玉带斑岩型铜矿床等,其赋矿围岩均为一套多旋回火山—沉积岩系。文章获得侵入该岩系下部岩性段中闪长玢岩SHRIMP锆石U-Pb年龄为(442.6±5.3)Ma和(437.1±3.8)Ma,其精确限定了该岩性段形成时代上限为晚奥陶世,表明这套含矿岩系最早可能形成于奥陶纪。The large sized Honghai （-Huangtupo） VMS type Cu-Zn deposit, Hongshi-Meiling hydrothermal vein type copper deposit and Yudai porphyry type copper deposit occur in the Kalatage ore concentration area, eastern Tianshan district, Xinjiang. The area possesses various genetic types of deposits, such as the ore-host rocks consist of series of volcanic-sedimentary rocks with complex volcanic cycles. The U-Pb age measurement results by the high precise SHRIMP method of zircon samples collected from diorite porphyrite which intruded into the bottom of the ore-host rocks in the Kalatage ore concentration area, are （442. 6±5.3） Ma and （437.1 ±3.8） Ma respectively, which precisely defined the upper limit of the age of the lower section of the ore-host volcanic rocks is late Ordovician, it indicates the ore- host volcanic rocks were formed in the earlier Ordovician period.

关 键 词：新疆 东天山 卡拉塔格 火山岩 闪长玢岩 锆石U—Pb年代学 

分 类 号：P533[天文地球—古生物学与地层学] P588.14[天文地球—地质学]