桐柏山南坡的脆-韧性逆冲推覆构造

BRITTLE-DUCTILE THRUST NAPPES ON THE SOUTH SLOPE OF TONGBAI MOUNTAINS

桐柏山南坡广泛出露的前寒武纪3个变质地体中,发育了多期脆-韧性逆冲推覆构造。本文详述了它们的几何学、岩石变形特点和运动学特征,并讨论了它们在桐柏造山带自古元古代晚期到中生代漫长的地壳构造发展演化过程中的地质意义。

There are five periods of brittle-ductile thrust nappes developed in three Precambrain metamorphic terranes on the south slope of Tongbai mountains. They formed during compression events of various ages,and were alterated strongly in the later extension and con-straction from the late period of Early Proterozoic to Mesozoic. The characteristics of geometry, rock deformation, kinematics, and their significance in the crustal tectonic evolution of Tongbai orogenic belt during the Early Proterzoic to Mesozoic are discussed in this paper.