赣东北塔前-赋春成矿带画子山地区地球物理特征及找矿启示  

Geophysical Characteristics and Prospecting of the Huazishan Area in Taqian-Fuchun Metallogenic Belt, Northeastern Jiangxi Province

作　　者：林建勇 罗凡 陈辉 LIN Jianyong;LUO Fan;CHEN Hui(Geologic Party No.272,CNNC,Nanjing 211102,China;School of Geophysics and Measurement-control Technology,East China University of Technology,Nanchang 330013,China)

机构地区：[1]江苏省核工业二七二地质大队,南京211102 [2]东华理工大学地球物理与测控技术学院,南昌330013

出　　处：《高校地质学报》2020年第2期175-184,共10页Geological Journal of China Universities

基　　金：国家自然科学基金(41164003,41404057,41864004)资助。

摘　　要：画子山地区隶属于赣东北塔前-赋春成矿带,其具有地质条件复杂,深部成矿条件优越等特点。在复杂的地质条件情况下,对多种地球物理方法进行有机的结合,可较为客观的反映地下深部信息。而物性差异是地球物理方法的应用研究前提,首先对画子山地区的岩石标本进行物性分析。基于物性分析结果,在画子山地区针对性的布设两条(8线和11线)重力、磁法及可控源音频大地电磁法综合地球物理剖面,然后结合地质、物性、钻孔等资料对综合剖面进行解译,解译得到重力高值和低阻异常区是由矿化引起,磁异常带由蚀变所引起。最后通过分析综合剖面反映出地下的高密度体、高磁性体和低阻高极化体的分布规律,圈定出找矿的重点区域为万年群牛头岭组上段地层的西南方向,为画子山地区的下一步工作指明方向。The Huazishan area belongs to the Taqian-Fuchun Metallogenic Belt in the Northeastern part of Jiangxi Province. It has complicated geological structures but superior conditions for deep metallogeny. For the complicated geological conditions, a combination of a variety of geophysical methods can help detect deep geologic strcutures. The difference in physical properties of rocks is the basis for the application of geophysical methods. First, the physical analysis of rock specimens in the Huazishan area was carried out. Then,two(8-line and 11-line) gravity, magnetic and controllable source audio magnetotelluric integrated geophysical profiles were obtained from the Huazishan area. The integrated geophysical profiles are interpreted in combination with geological, physical and drilling data.The high gravity and low resistance anomaly zone is interpreted to result from mineralization, and the magnetic anomaly zone was likely caused by alteration. Finally, by analyzing the integrated geophysical profile, the distribution of high-density, high-magnetic and low-resistance high-polarity region in the underground is mapped, and the key area for prospecting is located in the southwest direction of the upper strata of the Niutouling Formation of the Wannian Group. The findings of this study will aid in future ore-deposit prospecting work in the Huazishan area.

关 键 词：塔前-赋春成矿带 画子山地区 地球物理特征研究 

分 类 号：P631[天文地球—地质矿产勘探]