岩矿测试2016，Vol.35Issue(3)：320-328,9.DOI:10.15898/j.cnki.11-2131/td.2016.03.016
西藏驱龙-甲玛-邦铺铜矿集区铅同位素地球化学示踪研究
Lead Isotope Geochemistry in the Qulong-Jiama-Bangpu Ore Concentrated Area of Tibet
摘要
Abstract
The Qulong-Jiama-Bangpu copper polymetallic ore concentration area is one of the most important areas in the Gangdese metallogenic belt of Tibet with more than 15 million tons of copper resources.Ore-forming materials for three deposits were considered to be derived from magma. However,the relationship between magma with different degrees of mineralization and times and copper mineralization are unknown,especially on a regional scale. By collecting the published lead isotope data of ores, intrusions and strata from these three deposits,the lead isotopic composition of ores from Qulong,Jiama and Bangpu are were found to be similar to those of Miocene ore-bearing porphyries but different from those of intrusions unrelated to mineralization.Spatially,from Qulong in the southwest,to Jiama,and to Bangpu in the northeast,the mineralization ages range from old to young,and lead isotopes evolve obviously with radiogenic lead increments (average 206 Pb /204 Pb values of ores 18.521 →18.644→18.684).Lead isotope geochemistry not only indicates the magma source,but also can differentiate between ore-related intrusions from ore-barren intrusions and suggest the relationship between intrusion and mineralization.关键词
铅同位素/成矿物质来源/驱龙-甲玛-邦铺/铜矿集区Key words
lead isotope/source of ore forming materials/Qulong-Jiama-Bangpu/copper concentration area分类
化学化工引用本文复制引用
应立娟,王阔,王开建..西藏驱龙-甲玛-邦铺铜矿集区铅同位素地球化学示踪研究[J].岩矿测试,2016,35(3):320-328,9.基金项目
中国科技部重大仪器专项（2011YQ050069）；国家自然科学青年基金资助项目（41302058）；中国地质大调查项目 （）
