摘要
采用野外调查结合室内测试手段,研究并总结了西藏昂青银多金属矿床地质特征和成矿规律。结果表明:西藏昂青银多金属矿床产于三江成矿带中段玉龙铜矿带莽总斑岩铜矿外围,为接触交代夕卡岩型银、铅、锌、铜多金属矿床。该矿床成矿元素具有明显的分带性,浅部为Pb、Ag元素,向深部逐渐过渡为Pb、Cu、Zn元素。该矿床成矿年龄为(37.6±0.2)Ma,为印度—亚洲大陆碰撞造山带晚碰撞阶段挤压—伸展构造背景下成矿作用的产物,成矿与莽总斑岩体有关。
The deposit characteristics and metallogenic regularity of the Angqing silver polymetallic deposit in Tibet are summarized based on the field investigation and laboratory analysis. The results show that the deposit is located near Mangzong porphyry cop- per deposit in the Yulong copper ore belt in the Nujiang-Lancang-Jinsha rivers area. The deposit belongs to a contact metasomatic skarn type polymetallic Ag-Pb-Zn-Cu deposit. The ore-forming elements show a zonality invertically as followings： Pb-Ag in upper part, and Pb, Cu, Zn in the depth. The ore-forming age was about （37.6±0.2）Ma, so the deposit was formed in the later collision period of the India-Asia continental collision orogenic belts, where in the compression-extension tectonic setting. The ore-forming was related to the Mangzong pophyry.
出处
《矿产勘查》
2017年第5期732-740,共9页
Mineral Exploration
关键词
昂青
银多金属矿
矿床特征
成矿规律
西藏
Angqing, silver polymetallic deposit, deposit characteristics, metallogenic regularity, Tibet
