桂东南南渡—莲塘岩体的应变测量与应变特征

THE STRAIN MEASUREMENT AND STRAIN CHARACTERISTICS OF NANDU-LIANTANG PLUTON IN SOUTH EASTEN GUANGXI

桂东南南渡—莲塘岩体及其围岩的应变测量结果表明：岩体总体以压扁变形为主，收缩变形为辅；热接触变质带内近岩体—侧以压扁变形为主，而远离岩体则转为以收缩变形为主。花岗岩浆沿博白—岑溪断裂带内由左旋走滑剪切所产生的构造位张空间侵位，故岩体和围岩的应变强度均软弱。

The strain measurement of Nandu-Liantang pluto and its surrounding rocks shows:that the whole pluton was dominantly subjected to flattening with minor constraction.From its inner thermal contact metamorphic zone to outer zone to outer zone the dominant strain pattern is learly switched from flattening to constraction. It is also noted that the pluton and its surrounding rocks were not intensively strained. Because the granitic magma emplaced right into the extensional jogs which were caused by the sinistral strike-slip shearing of Bobai-Chenxi fault zone.