变形分解作用与中条山上玉坡变基性侵入岩席的厘定

通过对中条山胡家峪—上玉坡背斜核部正变质基性岩的变形分解及变质作用的研究以及变形变质系列的建立,结合成因矿物学的研究及铜矿峪地区绛县群变基性火山岩的岩石学和岩石化学的对比,确认背斜核郎的黑云片岩系为与中条运动早期区域性伸展有关的沿剥离断层侵入的基性岩席的变形变质产物。从而否定了长期以来一直把它定为“绛县群铜矿峪组(或西井沟组变基性火山岩)”的论断,对中条山变基性浸入岩的形成和演化作出了新的解释。

DEFORMATION PARTITIONING AND DETERMINATION OF SHANGYUPO METABASIC INTRUSIVE SHEET,ZHONGTIAO MOUNTAIN

Through the study of deformation partitioning, metamorphism, genetic mineralogy and especially the establishment of deformational and metamorphic reworked series of the orthometabasites in the core of Hujiayu Shangyupo anticline of Zhongtiao mountain,Shanxi province, and by the comparison of petrology and petrochemistry with metabasic volcanic rocks of Jiangxian group in Tongkuangyu area north of the study area, the authors suggest that the biotite schists in the core of Hujiayu- Shangyupo anticline of Zhongtiao mountains is the metabasic intrusive sheet related with extensional tectonic event of earlier Zhongtiao movement. Thus, the traditional inference defining it as "metabasic volcanic rocks of Jiangxian group (Tongkuanyu or Xijinggou formation)' is negated, and the origin and evolution of metabasic igneous rocks of Zhongtiao mountain is discussed.