Principle and Technique of Calculating Seismic Velocities from Lattice Preferred Orientation (LPO) Data of Minerals

作     者：Guan Xiaoping Department of Applied Geophysics, China University of Geosciences, Wuhan 430074 Jin Shuyan Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：1998年第17卷第2期

页      面：60-66页

核心收录：

学科分类：081801[工学-矿产普查与勘探] 081802[工学-地球探测与信息技术] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：omphacite fabric seismic velocity anisotropy contouring. 

摘      要：Deducing seismic velocity anisotropy from LPO (lattice preferred orientation) data of deformed rock samples, a significant link between geology and seismology in geoscience researches, has extensive and promising application. In this paper, the principle and programming technique are highlighted to illustrate the comprehensive automatization procedure. In computer algorithm, two aspects of the programs commonly used in the world are improved: (1) the addition of a pre processing subroutine makes the straightforward calculation realizable from universal stage readings to geographic azimuths and thus to solution of all crystal axes, even for non orthorhombic a and c axes in monoclinic systems. (2) the simplification and perfection of programming can be implemented in the light of Visual Basic (VB) resource. The algorithm has been verified with results from practical data of omphacite samples.