内蒙古新达来草原覆盖区钼铜多金属成矿预测  

Metallogenic prediction of Mo-Cu polymetalic deposits in the Xindalai grassland-covered area,Inner Mongolia

作　　者：熊双才 夏庆霖[1,3] 姚春亮[1] 张晓军[1] 覃莹 张坤 

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]新疆地质矿产局第一地质大队,新疆昌吉831100 [3]紧缺矿产资源勘查协同创新中心,湖北武汉430074 [4]山东省第六地质矿产勘查院,山东威海264209

出　　处：《地质学刊》2015年第3期422-430,共9页Journal of Geology

基　　金：中国地质调查局项目"覆盖区找矿靶区优选与验证"(12120113089300)

摘　　要：内蒙古新达来草原覆盖区位于西伯利亚板块东南大陆边缘晚古生代陆缘增生带,属古亚洲成矿域的二连—东乌旗铜钼铁晚古生代—中生代成矿带的一部分,找矿潜力巨大。该区被牧草和第四系大面积覆盖,基岩出露较差,找矿工作相对滞后。通过研究该地区区域成矿地质背景和典型矿床地质特征,分析控矿因素与找矿标志,构建综合信息预测模型,提取地质、地球化学、地球物理、遥感等找矿信息,借助GIS技术进行覆盖层"揭盖"和对找矿信息进行提取,以Geo DAS矿产预测软件为平台,运用多重分形滤波技术区分复杂背景与异常,提取矿化弱异常,应用模糊证据权法进行信息综合集成,形成预测后验概率图,圈定找矿远景区并进行验证,探索内蒙古草原覆盖区内生金属矿床勘查与预测评价新途径。The Xindalai grassland-covered area is located in the late paleozoic continental-margin accretionary belt at the southwestern margin of the Siberia Plate.It belongs to the late Paleozoic- Mesozoic Erlian- Dongwuqi Cu-Mo-Fe metallogenic belt,part of the Palaeo-Asian Metallogenetic Domain,with a great prospecting potential.This area is largely covered by pasture and the Quaternary sediments,and the prospecting work has failed to achieve breakthrough because of the poorly outcropped bedrock.Therefore,this study discussed the regional metallogenic background and geological features of typical deposits to analyze ore-controlling factors and prospecting indicators,and established a comprehensive prospecting model to extract useful ore-related geological,geochemical,geophysical and remote sensing information.In addition,we used the GIS technology to uncover the cover layer and extract favorable metallogenic information.In the Geo DAS mineral prediction software platform,we utilized the multi-fractal filtering technology to distinguish between background and anomalies and identify weak mineralization information.Comprehensive ore-related information was integrated by the fuzzy weights of evidence method formation to form a posterior probability prediction map,and prospecting targets were delineated and verified.This study explores a new way of prospecting and assessing the endogenic metallic deposits in grassland-covered areas of Inner Mongolia.

关 键 词：草原覆盖区 GEO DAS软件 非线性模型 模糊证据权方法 成矿预测 内蒙古新达来 

分 类 号：P612[天文地球—矿床学] P618.4[天文地球—地质学]