加里曼丹及邻区壳体的运动与演化

MOVEMENT AND EVOLUTION OF CRUSTOBODY IN KALIMANTAN AND ADJACENT AREAS

加里曼丹岛位于西太平洋东南亚陆缘构造-岩浆活动带,是自中新生代以来地球岩石圈最复杂的构造活动区之一。本文通过对区域地壳的基底及深部构造、地幔流应力场、最大主应力场、大地热流等地球物理特征资料的分析基础上,对加里曼丹岛及邻区的地壳性质与结构、大地构造运动与演化作了较详细的分析。认为东南亚陆缘壳体大致形成于中晚三叠世,同时对加里曼丹地区的大地构造分区进行了划分,讨论了该区大地构造运动-演化特征。

Kalimantan island is located in the S outheastern Asian continental marg inal tectono-magmatic mobile zone in the Western Pacific Oc ean,where the Earth's lithosphere is one of the most compl icated tectonic mobile regions in the earth since the Meso-Cenozoic.In the ligh t of geophysical data of the basement and deep structures of regional crust,stress field of mantle flow,the ma ximum principal stress field and geothermal flux,the authors analyzed detailedly crustal nature and str ucture in the Kalimantan island and adjacent areas,as well as geotecton ic movement and evolution.Southeastern Asian continental crustobady w as formed about in middle-late Triassic.Furthmore,geotectonic areal div ision of the Kalimantan area is divid ed,and characteristics of geotectonic movement and evolution are discusse d in the paper.