CAJ | 학술논문

晋北地区出露有不同层次的地壳,是研究构造相最理想的地区之一。本文以构造分析为主线,结合当前地壳流变学研究进展,对该区早前寒武纪构造特征进行了分析,初步建立了早前寒武纪地质事件序列。提出了该区北部（大同-集宁）麻粒岩相变质岩代表下地壳的物质组成,中部（恒山）中深变质岩代表典型的中下地壳过渡带的特征（早前寒武纪一个重要的软弱层）,南部（五台山）角闪岩相变质的五台岩群具中地壳构造特点,而绿片岩相变质的滹沱群代表上地壳构造特征的观点。根据不同层次的褶皱、断裂、布丁化岩石及同构造分泌结晶脉的宏观地质特征和与其相关的微组构特征,结合当前实验研究成果,提出了变质岩构造相新的划分方案,对该区进行了构造相的划分。在此基础上对该区构造相相变进行了探讨。
진북지구출로유불동층차적지각,시연구구조상최이상적지구지일。본문이구조분석위주선,결합당전지각류변학연구진전,대해구조전한무기구조특정진행료분석,초보건립료조전한무기지질사건서렬。제출료해구북부（대동-집저）마립암상변질암대표하지각적물질조성,중부（항산）중심변질암대표전형적중하지각과도대적특정（조전한무기일개중요적연약층）,남부（오태산）각섬암상변질적오태암군구중지각구조특점,이록편암상변질적호타군대표상지각구조특정적관점。근거불동층차적습추、단렬、포정화암석급동구조분비결정맥적굉관지질특정화여기상관적미조구특정,결합당전실험연구성과,제출료변질암구조상신적화분방안,대해구진행료구조상적화분。재차기출상대해구구조상상변진행료탐토。
Northern Shanxi province is considered to be one of the most popular places for the tectonic facies researches due to the various structural characters at different crust levels.In the present study,the relative order of geological events in Early Precambrian was established using the structural analysis combined with the research progress of geological rheology.The results are as follows： the rocks of the lower crust in Datong-Jining areas are believed to consist chiefly of granulite-facies metamorphic rocks;the high grade metamorphosed crustose rocks in Hengshan Mt.may represent the transitional zone of mid-lower crust;the amphibolite facies metamorphic rocks are mainly in the southern areas（Wutai Mt.）;the greenschist facies metamorphic rocks are characterized by the presence of upper crust in Hutuo group.In addition,based on the different geological characters of fold,fracture,pudding of the rock and syntectonic crystallization,we provide some references for analyzing the tectonic facies and the structural phase transition in the Northern Shanxi province.