Abstract: In this paper microstructure,texture,and preferred orientations in peridotites from Fangshan have been studied and kink structure,glide systems in olivins have been measured primarily.Fangshan is a volcanoc cone which consisted of Cenozoic alkali-basalts as the substances were carried out from upper mantle by volcanic eruptions.The results indicate that crystalline plasticity and solid state flow are characteristic of upper mantle.The upper mantle physical parameters for this region have been calculated as:
Temperature T=1278-1487癒
Confining pressure P= 17.3-30.1kb
Applied stress =214-362b
Depth Z = 57-95km
strain rate = 10^-13...10^-16 strain/sec.
Viscosity =1.3?10²⁰p-1.3?10²³p.

摘要： 本文对江苏六合方山玄武岩火山锥中的幔源捕虏体进行了显微构造、结构、组构以及橄榄石的扭折构造和滑移系作了测定和初步研究,并估算了本区上地幔古温压状态和应变速率等物理参数,对上地幔的运动特性进行了探讨。