基于GIS的颗粒形状和应变分析

ANALYSES ON GRAIN SHAPE AND LIMITED RESPONSE USING GIS

将GIS应用到岩石颗粒形状和有限应变分析,使用了GIS地理数据库管理和空间对象叠置分析功能,说明了在GIS环境中颗粒形状参数和属性参数的定义与获取方法;对颗粒有限应变分析时,使用了两种方法:最近邻弗莱法(TFry)和ASPAS法。以苏北盆地大丰—兴化勘探区块碎屑岩玻片为研究对象,成功地分析了矢量化后的颗粒多边形形状及晶体塑性变形,为构造地质分析和应用领域提供了一个方便快捷的工具。

By geographical database management and space objects overlay analysis of GIS, this article makes a use of GIS in the analyses on grain shape and limited response of rocks, bringing about an approach of defining and getting grain parameters of the shape and attributes in GIS environment. In the analysis on particle limited response, two methods were used： TFry and ASPAS. Taking the thin sections of elastic rock from Dafeng-Xinghua exploration blocks in north Jiangsu Basin as research objects, an analysis has been made on the polygon shape and crystal plastic property of grains after vectorization, providing a powerful method for structural geology analysis and application.