ON THE ORIGIN OF THE EASTERN SHANDONG OROGENIC BELT
Ling Xianzhang Liu Chunhua Xu Xuechun Lu Liangzhao (Changchun University of Earth Sciences, Changchun 130026)
The Ludong orogen was formed from the collisional zone which was resulted from the collision of the Yangtze continental segment which the Jiao-Liao kern in middle or late proterozoic ear. And the collisional zone substanially uplift orogenically in indo-Chinese epoch stage of Yanshan. At the points of tectonism and magamism, the orogen can be divided into two tectonic units, i.e, Jiaobei uplifting and Eastern Shandong-Northern Jiangsu melange belt. The extensive high pressure and high pressure metamorphic belt in the melange belt was formed by ultrahigh-pressare and high-pressure metamorphism in the original area during the movement of the continental collision.