摘要
夏河-合作地区位于我国著名的西秦岭成矿带上,前人在此做了很多研究,取得了丰富的成果,形成了一套夏河-合作地区的成矿理论,认为岩体是该地区成矿的重要控制因素,但是现阶段对该地区深部岩体相关研究较少。本文在总结前人工作的基础上,利用最新的重力测量数据,使用小波多尺度分解、功率谱场源深度分析的方法,提取研究区局部场,突出局部重力异常特征,结合实际测量的岩石物性参数与地质地层信息,使用2.5D人机交互解释剖面与密度成像的方法,对夏河-合作地区主要岩体的边界、深部延伸形态进行了探究,取得了良好的效果;对于地质图上已有的5大岩体,在识别的基础上对其深部延伸方向、倾向、倾角进行了计算,刻画了其深部形态,同时识别了14个在地表地质资料上没有显示但是重力异常较为明显的可能的隐伏岩体范围,填补了夏河-合作矿集区外围以及深部地质资料的空白,为该地区深部找矿提供了依据。
Although many researchers have done a lot of researches in the Xiahe-Hezuo area,an area located in the famous west Qinling metallogenic belt in China and have formed a set of metallogenic theories on this area,yet few studies can be found related to the deep rock mass in this area.Benefiting from the previous work,this paper drains the latest gravity measurement results to extract the local field in the study area and highlight the local anomalies by the wavelet multi-scale decomposition and power spectrum field source depth analysis,then combines the actual measured rock physical parameters and geological stratigraphic information,with the method of 2.5D human-computer interaction to interpret profiles and density imaging,the boundary and deep extension of the main rock masses in the Xiahe-Hezuo area,having achieved good results.Based on the identification of the five existing rock masses on the geological map,the extension direction,inclination and dip angle of the deep part of the five major rock masses are calculated,and the deep morphology is characterized.At the same time,14 possible hidden objects are identified with obvious gravity anomalies which were not shown in the surface geological data.The scope of the rock mass fills the gaps in the geological periphery data and deep parts of the Xiahe-Hezuo ore concentration area,thus provides a basis for deep ore prospecting in this area.
作者
吴玄
刘铁华
Wu Xuan;Liu Tiehua(Geological Subgrade Design and Research Institute,China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan Hubei 430063,China)
出处
《工程地球物理学报》
2022年第4期512-524,共13页
Chinese Journal of Engineering Geophysics
基金
国家重点研发计划课题(编号:2017YFC0601504)。
关键词
夏河-合作
岩体
小波多尺度分解
场源深度分析
重力异常特征
Xiahe-Hezuo
rock
wavelet multiscale decomposition
field source depth analysis
characteristics of gravity anomaly
