东海陆坡北部隆脊地形趋势面的研究

TREND SURFACE STUDY OF THE UPRISE TOPOGRAPHY IN NORTH CONTINENTAL SLOPE OF THE EAST CHINA SEA

依据 1994年和以往的调查 ,都发现在东海陆坡北部 30 0～ 50 0 m等深线之间 ,出现一条 NNE走向的隆脊地貌体 ,其东、西两侧下降近百米以上 ;用趋势面方法对该隆脊进行地形趋势面的研究。

There is a rectangle block ridge landform uprise extending NNE direction in the north continental slope of the East China Sea. It lies in the latitudes between 29°30′E and 30°10′N,Longitudes between 128°00′E and 128°20′E.The water depth generally ranges from 300 m to 500 m,that of its top is about 300 m to 400m. Its east profile falls down to the bottom of the continental slope and connects to the bottom of the Okinawa Trough. The method of trend surface analysis is used in the paper. The trinal trend surface analysis on the north of the continental slope indicates that the continental slope is on entirety spreading NNE direction. Trinal residual maps reflect the break of the down part, forming the tevariation of part topography in NNE direction. This just coincides with the appearance of the uprise on the continental slope.