摘要
南当厂银铅锌矿床位于超大型矿床都龙锡锌多金属成矿带最南端,是一以银矿为主的银铅锌矿床.经研究认为,矿床(体)赋存于区域变质绿片岩相带的中寒武统田蓬组第二段第二亚段(∈2t2-2)上部的碳酸盐岩中,呈沿层展布的陡倾斜似层状矿体;经工程揭露和控制,揭露大小矿体共八个,其中③为主要矿体,规模最大.矿床的形成经历了沉积矿源层—区域变质热液改造—岩浆热液叠加等三个互相联系又继承发展的长期演化过程.碳质白云石大理岩中的层间断裂破碎带,是银铅锌矿床最有利的赋存空间.
Nandangchang Ag-Pb-Zn deposit,located in southern most super large ore deposit Dulong Sn-Zn polymetallic metallogenic belt which is a silver deposits mainly. Based on detailed researches on characteristics and control of drilling expose for Nandangchang Ag-Pb-Zn deposit in Maguan,the ore body are hosted in the carbonate on the top of the second sub-segment of the second segment Tianpeng formation （~ 2 t2-2） of middle- Cambrian in the regional metamorphism of green schist facies belt, usually being as the layered ore body along the layer distribution in the steep slope. Based on the engineering expose and control, eight orebodies with different size are found, and （~） is the main ore body for its largest size. The formation of ore deposit underwent three interrelated and inherit the development of the long-term evolution process： sedimentary beds-regional metamorphism hydrothermal transformation-magmatic hydrothermal superposition. The fractured zone in the Carbonaceous dolomite marble interlayer is the most favorable space for Ag-Pb-Zn precipitation.
出处
《河南科学》
2013年第10期1698-1703,共6页
Henan Science
关键词
银铅锌矿床
地质特征
找矿远景
云南马关
Ag-Pb-Zn deposit
geological characteristics
exploration prospect
Maguan Yunnan Province
