抄録
China is divided into 24 " Tectonic Provinces", of which five provinces, such as Tsinling, Himalaya, and Taiwan, are the poly-orogenic provinces. Five " Tectonic Cycles " and ten " Orogenic Phases': are established. The latter is as follows : Sangkan (>2400 m. y.), Taihang (〜1300 m. y.), Jinning (〜95C m. y.), Sinian (〜570 m. y.), Caledonian (〜400 m. y.) Variscan (〜230m.y.), Inodosinian (〜180 m.y.), Yenshan (〜65 m. y.), Himalayan (〜26 m. y), and Neotectonic (〜recent). In the western mountain region, the E-W faults predominate, and the rhombic tectonic provinces elongated in E-W direction (Tarim Basin) were formed. In the eastern plain region, the NNE faults predominate, and the rhombic tectonic provinces elongated in N-S direction (Taihang Block) were formed. The arrangement of erogenic belts since Caledonian phase, unlike North America, seems to be distributed very complicatedly, and several peripheral seas and island arcs were formed in East Asia in the Himalayan to Neotectonic phases. The acidic igneous activity in the late Mesozoic age in China, extended in Korea, Japan, and N. E. Siberia, was very extensive, and its region had a breadth of 2000 km from the Pacific coast. The ophiolite belts including glaucophane schist and melange-like conglomerate are distributed along some deep fault zones of inner continent, such as Tsinling, Kinsha Kiang River, etc., and these are regarded as the boundaries between old ocean and continent. Precambrian paired metamorphic belts (green schist and gneiss-granite) of island arc-type, have been revealed in the Szechuan-Yunnan Provinces.
