鲁西地区早前寒武纪地质构造

NEW RECOGNITION OF THE EARLY PRECAMBIAN;GEOLOGICAL STRUCTURE IN WESTERN SHANDONG

摘要: 鲁西地区早前寒武纪（变质岩区）基底褶皱主要型式为泰山岩群组成的向斜与TTG花岗岩组成的背形间列。基底断裂主要有下港—化马湾—南涝坡构造杂岩带;沂沭断裂带及数条大型韧性剪切带。受迁西运动、阜平运动和五台运动影响,使岩层发生多次变质变形作用。鲁西地块在2800～2300 Ma期间迅速增长形成。

Abstract: The main pattern of the basement folds in the Early Precambrian metamorphic terrane of western Shandong is represented by alternate arrangement of synclines made up of the Taishan Rock Group and the anticlines composed of TTG granite. Basement fractures mainly include the Xiagang-Huamawan-Nanlaopo tectonic complex zone, the Yi-Shu fracture zoneand several major ductile shear zone. Under the influence of the Qianxi, Fuping and Wutai movements, Early Precambrian metamorphic rocks underwent metamorphism and deformation several times. The Western Shandong block rapidly expanded and thus fomed during the period from 2800 to 2300Ma B. P.