新疆阿尔泰克朗盆地热液成矿时代的裂变径迹分析  

Fission Track Thermochronology Application to Mineralization Ages of Hydrothermal Deposits in Kelang Basin,Northern Xinjiang,China

作　　者：袁万明[1] 保增宽[2] 董金泉[2] 安银昌 

机构地区：[1]中国地质大学(北京)地质过程与矿产资源国家重点实验室,北京100083 [2]中国科学院高能物理研究所核分析技术重点实验室,北京100049 [3]新疆有色地质勘探研究院,乌鲁木齐830000

出　　处：《世界科技研究与发展》2007年第2期8-14,共7页World Sci-Tech R&D

基　　金：国家自然科学基金资助项目(40072068;10175076;10475093);国家重点基础研究发展规划项目(2001CB409804);国家科技攻关项目(2001BA609A-07-03)

摘　　要：应用裂变径迹技术研究成矿作用是一种新尝试。新疆克朗盆地各个矿区成矿流体包裹体均一温度变化于105~294℃,与锆石和磷灰石裂变径迹封闭温度基本一致,所以,裂变径迹方法用于可以应用于成矿作用研究。本文获得不同矿区6个锆石和17个磷灰石裂变径迹分析结果,其中锆石年龄为134 Ma^312 Ma,分属312 Ma,247Ma和158~134 Ma三个年龄组,是3个成矿期的体现;磷灰石年龄为30~130 Ma,是区内成矿作用结束后的热事件时代。因此,成矿作用不仅发生于海西期和印支期,而且发生于燕山期甚至喜山期。It is a new attempt to apply Fission track thermochronology to mineralization field and it is feasible because the homogenization temperature of metallogenic fluid inclusions from different ore deposits in Kelang basin, northern Xinjiang ranges from 105 ℃ to 294 ℃ and accords with the retentions temperature of fission tracks in zircon and apatite on the whole. This study has achieved 6 zircon and 17 apatite fission track analysis results. The zircon fission track ages range from 134 Ma to 312 Ma and are divided into three groups of 312 Ma, 247 Ma and 158 - 134 Ma. We consider that the three age groups reflect three metallogenic epochs. The apatite ages are between 30 Ma and 130 Ma, belong to end of the metallogenic thermal events. Consequently, the mineralization occurred not only in Hereynian and Indosinian epochs, but also in Yanshanian epoch, even in Himalayan epochs.

关 键 词：成矿时代 裂变径迹 克朗盆地 阿尔泰 新疆 

分 类 号：P612[天文地球—矿床学]