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亚洲东部及太平洋西北部中一新生代的地质发展有两个突出的特点:其一是岩浆岩的广泛发育,构成举世瞩目的东亚滨太平洋岩浆岩带;其二是形成一系列断陷盆地,包括边缘海、陆缘海及一些内陆盆地。前者为人类提供了各种内生矿产;后者则蕴藏丰富的能源。据近年研究,该区规模巨大的岩浆岩带和断陷盆地,均是中生代以来海洋板块与欧亚大陆板块聚敛时,俯冲和深熔以及由此派生的局部拉裂扩张的结果。本文试图通过对东亚及西太平洋板块构造的研究,初步揭示该区中一新生代岩浆活动的特点及规律性,并探讨其间的联系。
The Mesozoic-Cenozoic geological development in eastern Asia and the northwestern Pacific has two prominent features: one is the extensive development of magmatic rocks that make up the world-renowned East Asian Pacific magmatic belt; the other is the formation of a series of fault-depression basins, Including the marginal seas, continental margins and some inland basins. The former provides humans with a variety of endogenous minerals; the latter is rich in energy. According to recent studies, the huge magmatic belts and fault basins in the area are the result of subduction and deep-melting and the local expansion of the fractures resulting from the convergence of the ocean plate and the Eurasian plate since the Mesozoic. This paper tries to reveal the characteristics and regularity of the Mesozoic-Cenozoic magmatism in the area through the study of plate tectonics in East Asia and Western Pacific, and discuss the connection between them.