DEEP GEOLOGICAL STRUCTURE CONSTRAINTS ON SHALLOW GEOLOGY AND MINERALIZATION: A STUDY IN THE LAND AND SEA AREAS OF EAST CHINA

Based on the research of the 3D Model of Lithospheric Structure supported by the international cooperation mapping project among China and surrounding countries, and the comprehensive analysis and study of deep geological structures, shallow geology and mineralization, the authors proposed the following ideas in this paper:① up to the depth of 400 km, in the land and sea areas of East China, there are five tectonic layers. The variations of the third and fourth layers constrains the shallow geology and mineralization; ②The land and sea areas of East China are under the squeezing pressure from surrounding areas, in which the pressure from the west dominates, resulting in the accumulation of great amount of asthenospheric materials and the formation of a large thermal energy and dynamic region. As the result, the forth power area is formed in the Asian Continent; ③the suduction of the Pacific Block ends at the latitude of 42°40'N along the Wandashan Mountain and the Far East of Russia, while the subduction of the Philippine Sea Block ends along Taiwan and Southeast coastal area of China. The joint action of the above-mentioned two forces drives the asthenospheric materials flowing to the Eastern sea area; ④the huge amount of energy from the asthenoshere, and the dynamic effect derived from the movement caused the formation of seven geological and morphologic features and three kinds of mineral resources in the land and sea areas of East China. The relationship between magmatism and the fossil fuel resources, such as petroleum, natural gas and coal, is not always negative. Magmatic activities may provide important thermal conditions necessary for oil-gas maturation, coalification and metamorphism; ⑤the huge amount of energy from the asthenosphere as well as its dynamic effect, may bring about some unique geological effects in the land and sea areas of East China; a, formation of some Cenozoic small oceanic basins, which have subducted to the Palawan Island; b, formation of some Cenozoic continental margin rift belts and the formation of the Qiongzhou Strait and Taiwan Strait, and the slight subduction towards the Taiwan Strait; c, the enormous accumulation of the asthenospheric materials caused the formation of a "giant Magmatic Mountain", which is in fact the source and foundation of the mantle plumes in the land and sea areas of East China. Each mantle plume is the peak of the Magmatic Mountain. It is believed that more mantle plumes or Magmatic Mountain peaks will be discovered in the future; d, except the deep earthquake (540 km) happened in Huichun of Jilin Province, most of the earthquakes in the Eastern China, as well as those occurred in Korean Peninsula and to the west of it in the land and sea areas of East China are mainly shallow and intermediate ones (<100 km), the main energy of which is from the giant thermal accumulation, the source of the earthquakes and the subduction of the Pacific Block and the Philippines Sea Block only play a limited role as a supplement to provide remote stresses; e, The giant thermal energy and dynamic movement results in a series of basin-mountain coupling belts in the land and sea areas of East China. There are energy resources in basins, and mineral resources in mountains.