南极点和罗斯海滨壳幔结构  

CRUST MANTLE STRUCTURE UNDER SOUTH POLE AND ROSS SEA BEACH IN ANTARCTICA

作　　者：束沛镒[1] 张钋[1] 

机构地区：[1]中国科学院地球物理研究所

出　　处：《南极研究》1994年第3期12-19,共8页

基　　金：国家自然科学基金

摘　　要：本文根据美国极地台（南极点）和新西兰斯科特台罗斯海滨的ＷＷＳＳＮ台所接收的长周期深源远震图Ｐ波波形的理论地震图拟合，探讨南极洲壳幔构造特征。结果表明，南极点下方地壳厚约４５ｋｍ，双层结构；罗斯海滨地层厚约２４ｋｍ，３５０～４５０ｋｍ深度有明显低速带存在。In this paper, based on waveform comparision of theoretical seismgrams with four teleseismograms recorded by SBA(New Zealand) and SPA(U.S.A) of WWSSN.It shows that the crustal thickness beneath South Pole is about 45km, double layered structure.That crustal thickness below Ross Sea Beach is single structure, about 24km.At the depth of 350-450km it presents low velocity layer. The above results indicated different tectonic characteristics in both sides of Antarctic Transantarctic Mountain.

关 键 词：南极州 极地台 斯科特台 壳幔结构 罗斯 海滨 

分 类 号：P313.2[天文地球—固体地球物理学]