| 东昆仑五龙沟金矿床成矿热历史的裂变径迹热年代学证据 |
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| 关键词:fission track thermochronology thermal history metallogenic age gold deposit East Kunlun Mountains |
| 基金项目:中国博士后科学基金，中国科学院核分析技术开放研究实验室资助 |
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| Metallogenic Thermal History of the Wulonggou Gold Deposits in East Kunlun Mountains in the Light of Fission Track Thermochronology |
| The Wulonggou gold ore district lies in the northern part of Qinghai Tibet plateau.The investigation of the metallogenic thermal history and ore forming epochs of gold deposits is of great significance both in theory and in prospecting practice.This paper reports the analysis of fission track thermochronology of zircon and apatite from three gold deposits in Wulonggou area as a new method for studying mineralization.The measured zircon fission track ages range from 197.4 Ma to 235.0 Ma,an apatite fission track age is 200.5 Ma,whose corrected age,however,is 244 Ma.These fission track ages accord basically with the 207.1～252.0 Ma Rb Sr and K Ar isotopic ages of the ore deposits and reflect the metallogenic age in the corresponding temperature.Thermal history modeling results reveal that the gold district went through two events of ascending temperature and also two events of descending temperature,indicating both protracted nature of the metallogenesis and multiperiodic character of mineralization.There are obvious differences between zircon fission track ages of three gold deposits,which is confirmed by geological characteristics of the ore district. |
| YUAN Wan-ming,WANG Shi-cheng,WANG Fen-lan.2000.Metallogenic Thermal History of the Wulonggou Gold Deposits in East Kunlun Mountains in the Light of Fission Track Thermochronology[J].Acta Geoscientica Sinica,21(4):389-395. |
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