岩石变形变质过程中体积变化的估算方法

简林地介绍了估算岩石体积变化的５种方法：在可能求得岩石有限应变椭球体真实大小的情况下计算岩石体变的方法；在平面应变状态下求岩石体变的方法；非平面应变状态下岩石体变的估算方法；利用岩石中有关元素的含量变化求岩石体变的方法；利用岩石有关矿物的含量变化球岩石体变的方法，并对这些估算方法的运用条件及误差产生的原因进行了分析。

THE METHODS TO ESTIMATE VOLUME CHANGES IN ROCKS DURING DEFORMATION/METAMORPHISM

This paper introduces and perfects five methods for rock volume change estimation:if the axial rstio of finite strain ellipsoid a:b:c and longitudinal strsin of anyone direction with its direction cosines l,m and n is known,then estimate the volume change;under plane strain,method to estimate volume change;under non-plane strain.the method to estimate volume changes; if the difference in the total percentage of all the least mobile elements in and out of deformed/metamorphosed area of a layer is knowon the volume change may be estimated;if the difference in the total percentage of all insoluble minerals in and out of deformed/metamorphosed area of a layer is known the volume change is also may be estimated. Finally,the paper discusses the conditions under which the above methods are applid and the sources of inaccuracy.