摘要
铜陵矿集区中酸性侵入岩与成矿关系密切,区内几乎所有的内生金属矿均与侵入岩有关,岩体周边和深部是主要的找矿方向,发现和圈定隐伏及半隐伏岩体对本区新一轮深部找矿工作有着重要意义。本研究以铜陵矿集区1:5万航磁数据的3D反演成像为基础,结合物性参数和地质信息,选取适当的磁化率边界,对矿集区岩体的空间分布进行了识别和圈定,共确定了33个岩体,并对其3D空间形态进行了定量分析,大部分推测岩体与地表地质填图所得岩体吻合较好。依据"层位+岩体"的找矿模式,以航磁反演推测岩体为基础,结合其他成矿信息,确定了本区圈定深部找矿远景区的6条基本原则,圈定了6个深部找矿远景区,对铜陵矿集区深部找矿具有重要的指示意义。
In the Tongling ore concentration district, the intrusions are closely related to metallogenic activities and almost all endogenic metallic ore deposits. It is hence of great significance to find and delineate concealed and semiconcealed intermediate-acid intrusive bodies in the new round of mineral exploration. The 3D inversion imaging technique was applied in Tongling based on 1 ： 50 000 aeromagnetic data in order to detect intermediate-acid intrusive bodies. Based on the inversion result, the authors selected a suitable magnetic susceptibility boundary in combination with physical properties of the rocks as well as geological information, identified 34 intermediateacid intrusive bodies and studied their 3D spatial shapes. Most of the intermediate-acid intrusive bodies are consistent with geological mapping results at surface. The inversion results not only reflect the distribution of the intermediate-acid intrusive bodies at surface but also indicate their 3D spatial shapes at depth. According to the ＂horizon ＋ intrusive body＂ prospecting model in combination with other metallogenic information, 6 principles were established in search for ore prospect areas at depth based on rock bodies inferred by the aeromagnetic 3D inversion. 6 deep prospecting areas were delineated, and the data obtained provide important information for deep prospecting in the Tongling ore concentration district.
出处
《矿床地质》
CAS
CSCD
北大核心
2009年第6期838-849,共12页
Mineral Deposits
基金
"十一五"国家科技支撑计划项目"立体地质填图
流体填图技术与深部成矿预测试验研究"(编号:2006BAB01B01)
国家深部探测技术与实验研究专项第三项目"深部矿产资源立体探测技术与实验研究项目"(编号:Sinoprobe-03)的联合资助
关键词
地质学
铜陵矿集区
中酸性岩体
3D反演成像
航磁
深部找矿
geology, Tongling ore concentration district, intermediate-acid intrusive body, 3D inversion imaging, aeromagnetic data, deep prospecting
