贴近度与边缘海演化旋回

东亚大陆和西太平洋之间,存在着全球规模的边缘海-岛弧系。对于边缘海-岛弧系的成因,国内外学者众说纷云。我国大地构造学家张文佑(1983)简洁地概括为“拉张造海、挤压造陆”。本文对大量的有关边缘海的重、磁、地震、钻井和大地构造背景等资料综合分析之后,认为边缘海具有与大洋不同的演化旋回,而与陆缘地堑的演化阶段密切相关。

CLOSE-UP DEGREE OF FUZZY MATHEMATICS AND EVOLUTIONAL CYCLE OF MARGINAL SEAS

It is the first time to use the close-up degree of Fuzzy mathematics to compare the characters between the crust nature of the central basin of the South China Sea and that of the several marginal seas,troughs,and continental shelf seas in the West Pacific,and to quantitatively describe the similarities between them.The calculation results of the close-up degree show that the different values of close-up degree obtained from the central basin of the South China Sea reflect different stages of tectonic development of the marginal sea. The marginal sea as a continental margin graben system has its own unique evolution cycle.