世界地质 2017, 36(2) 560-569 DOI:   10.3969/j.issn.1004-5589.2017.02.022  ISSN: 1004-5589 CN: 22-1111/P

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本文关键词相关文章
tilt-depth法
上顶埋深
适用性
相对误差
下庄矿田
本文作者相关文章
PubMed
Tilt-depth方法适用性研究及其应用
曹伟平, 王彦国, 杨博, 刘建鹏, 魏伯阳, 李康, 邓居智
东华理工大学放射性地质与勘探技术国防重点学科实验室, 南昌 330013
摘要

Tilt-depth方法是一种可以快速反演磁源上顶深度的新兴方法。二维、三维模型试验表明,tilt-depth法反演误差与地质体的上顶埋深、厚度及水平尺度均有关,同时叠加异常也会对反演结果产生影响。实例中,将tilt-depth法应用于广东省下庄矿田航磁数据反演中,tilt梯度图上展示出了两条明显的近东西走向条带异常,推断为浅部基性辉绿岩脉在深部汇聚形成,并反演了两条高磁异常带上11个位置的磁源上顶埋深。反演结果揭示了下庄矿区内北侧高磁性体深度较浅,且具有南浅北深的构造特征,而南侧高磁性体规模较大,且埋深较厚,为该区深部矿产勘查提供了有利依据。

关键词 tilt-depth法   上顶埋深   适用性   相对误差   下庄矿田  
Applicability of tilt-depth method and its application
CAO Wei-ping, WANG Yan-guo, YANG Bo, LIU Jian-peng, WEI Bo-yang, LI Kang, DENG Ju-zhi
Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China Unversity of Technology, Nanchang 330013, China
Abstract:

Tilt-depth method is a new inversion method for fast estimation of the top depths of magnetic bodies. Two- and three-dimensional model tests show that the inversion error of tilt-depth method is related to the top depth, thickness and horizontal scale of geological body. In addition, superimposed anomaly also has an effect on the inversion results. Tilt-depth method is applied to the aeromagnetic data over Xiazhuang ore field in Guangdong, and the authors find that two near EW-trending anomaly zones on tilt map are produced from deep ultrabasic diabase. Tilt-depth method is used to invert top depths of 11 inversion points on the two high magnetic anomaly zones in the tilt map. Based on the inversion results, the authors found that the depth of magnetic body located in the north of the Xiazhuang ore field is relatively shallow and is getting deeper from south to north, whereas the magnetic body in the south of the Xiazhuang ore field is relatively deeper and with larger scale. This important information is very useful for the deep mineral exploration.

Keywords: tilt-depth method   top buried depth   applicability   relative error   Xiazhuang ore field  
收稿日期 2016-07-18 修回日期 2017-01-07 网络版发布日期  
DOI: 10.3969/j.issn.1004-5589.2017.02.022
基金项目:

国家自然科学基金(41504098,41504054)及国防科工委科研项目(科工技2013[969]号)联合资助.

通讯作者: 王彦国(1985),男,讲师,主要从事勘探地球物理学领域的教学与科研工作.E-mail:wangyg8503@126.com
作者简介:
作者Email: wangyg8503@126.com

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