摘要
内蒙古自治区库伦旗卧力吐矿床属矽卡岩型矿床,铅锌资源量合计已接近大型矿床规模。矿区内与成矿有关的海西期黑云母二长花岗岩可以分为相连的2个部分:一是东部的岩株,二是从岩株向西伸出的舌状岩体。主矿体主要产在舌状岩体下盘接触带的晚石炭世蚀变灰岩和大理岩中。主矿体的矿石矿物成分、围岩蚀变矿物和铜/铅锌比值等的变化规律以及舌状岩体产状特征表明,成矿流体总体上由南东向北西、由下往上流动。成矿流体和金属元素主要来自其东侧岩株的深部岩浆体。当深部流体上升到已固结的舌状岩体下方时,舌状岩体的隔挡作用使其下盘形成了工业矿体。矿区内未被钻孔控制的舌状岩体下盘还有较大的成矿潜力。
The Wolitu lead-zinc deposit located in Hure Banner of Inner Mongolia is a skarn-type deposit. The total Pb-Zn resource amount has almost reached a large deposit scale. The Hercynian biotite adamellite associated with the mineralization in the deposit can be divided into two connected parts,i. e.,the east stock and the tongue-shaped rockmass protruding out and upwards the west. The main orebodies mainly occur in the Upper Carbonaceous altered limestone and marble at the lower contact zone of the tongue-shaped granite. The ore fluids generally flow from SE to NW and from bottom to top inferred from the contents of ore minerals,wall rock altered minerals,ratios of copper to Pb-Zn in the main orebodies,and occurrence of tongue-shaped rock bodies. The ore-forming fluids and metals are mainly derived from the deep magmatic body of the eastern stock. When the deep fluids migrated upward to the consolidated tongue-shaped granite,they are blocked to form industrial orebodies in the footwall. There is still great prospecting potential in the footwall of those tongue-shaped rock bodies yet to be drilled.
出处
《地质学刊》
CAS
2016年第2期331-340,共10页
Journal of Geology
基金
国家自然科学基金(40172034)
关键词
花岗岩
下接触带
舌状岩体
卧力吐铅锌矿
内蒙古库伦旗
granite
lower contact zone
tongue-shape rock body
Wolitu Pb-Zn deposit
Hure Banner in Inner Mongolia
