复杂造山带地区三维地质填图中深部地质结构的约束方法:西准噶尔克拉玛依后山地区三维地质填图实践  

Constraining Deep Geological Structures in Three-Dimensional Geological Mapping of Complicated Orogenic Belts:A Case Study from Karamay Region,Western Junggar

作　　者：郁军建 王国灿[1,2,4] 徐义贤[5] 郭纪盛 陈旭军[2] 杨维[2,6] 龚一鸣[2] 陈超[5] 李永涛[5] 晏文博 肖龙[2] 

机构地区：[1]中国地质大学地质调查研究院,湖北武汉430074 [2]中国地质大学地球科学学院,湖北武汉430074 [3]河南省地震局,河南郑州450016 [4]中国地质大学地质过程与矿产资源国家重点实验室,湖北武汉430074 [5]中国地质大学地球物理与空间信息学院,湖北武汉430074 [6]贵州煤田地质局地质勘察研究院,贵州贵阳550008

出　　处：《地球科学（中国地质大学学报）》2015年第3期407-418,424,共13页Earth Science-Journal of China University of Geosciences

基　　金：中国地质调查局项目"西准噶尔克拉玛依后山地区三维地质调查试点"(No.1212011220245);"新疆1:25万铁厂沟镇幅(L45C002001)与克拉玛依市幅(L45C003001)区调修测"(No.1212011120502)

摘　　要：在地球物理资料稀少、钻孔数据匮乏的复杂造山带地区进行三维地质填图,目前尚处于实践探索阶段.我们的填图工作思路是:以精细地表地质调查为基础,在地质-地球物理-钻孔等多源数据约束下,充分利用野外走廊带解析剖面、实测自然剖面、地球物理解释剖面等资料,进行人机交互式三维地质建模,并根据使用资料的准确性、空间分辨的精细程度等对模型的可靠程度进行分块评价.浅表层以地表地质信息(包括产状、地层层序关系、地层厚度、褶皱形态、断层性质与位移、局部和区域概念地质模型等)约束为主,深部地质结构则主要依据地球物理剖面资料,少量钻孔资料不仅用以校验地球物理资料解释的可靠性,并对模型施加强约束.以西准噶尔克拉玛依后山地区三维地质填图为例,着重讨论了在三维建模中如何具体实现上述思路和约束方法.实践证明,该填图思路和建模方法是行之有效的,可操作性强.Three-dimensional geological mapping in the complicated orogenic belts is still in the testing stage due to inadequategeophysical and drill-hole data in the region.In this paper,we propose a method of three-dimensional geological modelling by using the measured natural profiles and the geophysical profiles under the constraints of detailed surface geological investigation data and the geology-geophysics-drilling data.The modelling reliability is evaluated based on the accuracy of the data and the spatial resolution.The surface structures are constrained by the surface geological information,including the attitudes,stratigraphic sequence and thickness,fold morphology,fault feature,and the local and regional conceptual geological models.The deep geological structures are mainly based on the geophysical profile data,in combination with proper drilling data which act as not only a test of the reliability of the geophysical interpretation but also an enhancement of the model.This paper takes the three-dimensional geological mapping of the Houshan area in Karamay as an example and discusses the detailed procedure in realizing the above-mentioned scheme,which shows both high efficiency and operability.

关 键 词：造山带 三维地质填图 三维地质建模 地质剖面 深部地质结构 约束方法 地球物理. 

分 类 号：P31[天文地球—固体地球物理学]