内蒙古额济纳旗老硐沟岩溶型矿体侧伏规律与找矿预测

Karst Orebody in Laodonggou, Ejin Banner, Inner Mongolia Siding Rule and Prospecting Prediction

摘要: 内蒙古额济纳旗老硐沟金矿区位于我国北山成矿带，矿区内构造变形复杂，多期次断裂交汇。矿区成矿条件优越，找矿潜力较大。近年来在老硐沟矿区II矿段及其附近探获多处岩溶型矿体，一直以来作为老硐沟矿区主要开采的矿体类型。经过多年的开采，该类型矿体已基本采完，且找矿工作无较大突破。本文对矿山以往地质、采矿资料进行重新梳理，并结合多年矿区工作经历及现场观察，编制了联合勘探线剖面图、岩溶型矿体3D模型图。以矿体侧伏现象为突破口，总结出岩溶型矿体明显往北西向侧伏的规律并圈定深部找矿靶区，为下一步找矿工作提供依据并提出建议。

Abstract: The Laodonggou gold mining area of Ejin Banner, Inner Mongolia is located in the Beishan metallogenic belt of China, with complex structural deformation and multi-stage fault convergence. The ore-forming conditions are superior and the prospecting potential is large. In recent years, many Karst orebodies have been discovered in the Mine Section II and its vicinity in Laodonggou Mining area, which has been the main orebody type in Laodonggou mining area. After many years of mining, this type of ore body has been basically finished, and there is no great breakthrough in prospecting work. Based on the previous geological and mining data of the mine, combined with many years of mining experience and field observation, this paper compiled the joint exploration line profile and karst type ore body 3D model. Taking the phenomenon of lateral deposit as a breakthrough, the law of obvious NW lateral deposit of karst type ore body is summarized and the deep prospecting target area is delineated, which provides basis and suggestions for the next prospecting work.