摘要
不同的构造环境,物源基础和保存环境形成矿床在观测结果上表现为不同的地球物理属性,地球物理探测方法利用密度、磁化率、极化率、电阻(导)率、波阻抗等物性差异进行地下地质体探测.利用地球物理方法进行成矿系统探测需要剖析从局部到区域矿物矿床形成的物源、通道和富集以及保存的完整过程,以便在不同的尺度范围内完成地球物理多属性结构成像,指导下一步具体找矿任务.区域地球动力演化、物质和能量源区控制着成矿始端,成矿流体富集成矿以及保存条件控制着成矿末端,流体迁移的通道将成矿始端和成矿末端连接,形成一个完整的成矿系统.本文从成矿系统始端和末端两方面分别阐述各个地球物理探测方法的发展历程和适用范围,最后通过长江中下游成矿带庐枞矿集区泥河铁矿找矿实例论述多尺度地球物理探测方法在成矿系统始端和末端应用效果.
Different tectonic environments, sources material, and preservation background illustrate distinct properties in the geophysical observation results. Geophysical detection methods use the characteristics difference of density, magnetic susceptibility, polarizability, electrical resistance(conductivity), and wave impedance to detect the deep geological anomalies. The multi-scale mineral system detection need to analyze the source, path, site, and preservation in order to delineate the deep processes in different scales and guide the future prospecting. Ore-forming material induced by the regional geodynamic movements underwent transportation, enrichment and storage conditions changes forms the ore deposit. The ore-forming material, path and the site form a complete mineral system. This article describes the development process and applicable scope of each geophysical detection method from the multi-scal deep structure of the mineral system, and finally discusses multi-scale geophysical exploration through the example of prospecting for the Nihe iron deposit in the Luzong ore-clusture of the middle and lower Yangtze River metallogenic belts.
作者
周文月
严加永
陈昌昕
ZHOU WenYue;YAN JiaYong;CHEN ChangXin(China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China;School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China;Chinese Academy of Geological Sciences,Beijing 100037,China;SinoProbe Center,Chinese Academy of Geological Sciences and China Geological Survey,Beijing 100037,China)
出处
《地球物理学进展》
CSCD
北大核心
2021年第3期1208-1225,共18页
Progress in Geophysics
基金
中国地质调查项目(DD20190012,DD20160082)
国家重点研发计划项目“典型覆盖区航空地球物理技术示范与处理解释软件平台研发”(2017YFC0602200)之课题“综合航空地球物理数据处理、解释和管理软件平台研发”(2017YFC0602204)
自然资源部航空地球物理与遥感地质重点实验室课题(2020YFL14)联合资助。
关键词
成矿系统
多尺度
地球物理探测
找矿思路
泥河铁矿
Mineral system
Multi-scale
Geophysical exploration
Prospecting ideas
Nihe iron deposit
