基于地表地质调查剖面网络基础上的复杂造山带三维地质调查与建模方法

Three-Dimensional Geological Mapping and Visualization of Complex Orogenic Belts

三维地质填图是一项探索性很强的开拓性工作,目前尚无成熟经验可循.对于地球物理和钻探资料相对有限的复杂造山带成矿带地区,区域性的三维地质结构的揭示更具挑战性.结合西准噶尔克拉玛依后山地区三维地质填图实践,提出造山带基岩三维地质填图的基本思路,对具有一定幅面一定比例尺的区域三维地质填图与建模的方法技术进行了总结,提出针对造山带区域的"基于地表地质调查剖面网络基础上的地质-地球物理-钻孔联合约束的三维地质调查方法体系",探索实践"基于地表地质调查剖面网络基础上的三维地质建模技术方法",强调建模的数据基础来自地表基础地质调查的系统路线剖面和实测剖面,即以地表实测地质路线为基础结合地球物理和钻探资料向下合理延拓,从而实现"区域三维地质填图"概念上的三维地质结构的数字表达.

Three-dimensional geological mapping is a pioneering job in frontiers without much experience.It is far more challenging to work out three-dimensional geological structure in a square area with certain scale for complex orogenic and metallogenic belts,where geophysical and drilling data are relatively limited.In this paper,we put forward a framework of the three-dimensional geological mapping and visualization for bedrocks of orogenic belts based on our three-dimensional geological mapping practice in the northwest Karamay,western Junggar.We emphasize that the basic data involved in visual modeling for a certain square area and scale are primarily based on the network of systematic surface geological sections and then the extension for the deep geological bodies which are based ongeological-geophysical-drilling united constraints.With the combination of surface geological sections and geophysical/drilling data,three-climension geological texture from surface to certain depths at a certain confidence level can be traced.That is to say that threedimensional numerical models of geological structures can be constructed by utilizing the rich data of classical＂surface regional geological mapping＂with the combination of geophysical/drilling data.