摘要
宁芜盆地是长江中下游成矿带中重要的金属矿集区之一,以中生代火山岩和铁矿床广泛发育为特征。近年来,随着找矿深度的不断加深,深部找矿的难度不断加大,成本越来越高,急需利用地球物理方法推断深部地质构造,为深部找矿提供依据,以减少勘探风险。为了解宁芜盆地南段钟姑矿田的深部构造、岩体、地层的空间展布,本文基于区域重磁数据,并以地表地质、钻孔地质等信息为约束,开展深部地质结构的反演研究,厘定了地层及岩体的展布,并结合已知矿床的重磁组合方式和控矿地质要素,基于重磁反演结果在钟姑矿田内圈定了两处有利靶区,为下一步找矿工作提供参考。
Ningwu basin,one of the most important mineral districts in the Middle and Lower reaches of the Yangtze River metallogenic belt,is characterized by the extensive development of Mesozoic volcanic rocks as well as iron ore deposits.With increasing of deep prospect in this area in recent years,finding ore deposits is increasingly difficult accompanied by increasing cost.It is high time to use geophysical methods to resolve deep geological structure,provide direct information for deep prospecting and reducing exploration risk.In order to understand the spatial distribution of deep structure,rocks and strata in the Zhonggu ore field in the south section of Ningwu Basin,this study carried out the inversion research of deep geological structure and determined the distribution of strata and rocks through the regional gravity-magnetic data and and drilling geological information.Based on the combination modes of gravity-magnetic prospecting and geological factors of ore controlling,two favorable prospecting targets in the Zhonggu ore field have been determined through inversion results.And this will provide references for the next step of prospecting.
作者
丁文祥
袁峰
李晓晖
孙维安
刘光贤
杨迪
DING Wenxiang;YUAN Feng;LI Xiaohui;SUN Weian;LIU Guangxian;YANG Di(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,230009;Anhui Province Engineering Research Center for Mineral Resources and Mine Environments,Hefei University of Technology,Hefei,230009;Xinjiang Research Center for Mineral Resources,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi,830011)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2018年第11期2301-2317,共17页
Acta Geologica Sinica
基金
国家重点研发计划项目(编号2016YFC0600209)
国家自然科学基金项目(编号41702353,41672069,41320104003)
中国科学院"西部之光"人才引进计划项目资助成果
关键词
钟姑矿田
深部地质构造
重磁
控矿地质要素
靶区
Zhonggu ore field
deep geology structure
gravity and magnetism
ore-controlling geological elements
target area
