亚洲板块运动欧拉参数的确定及其板内形变的分析  

INTRA-PLATE DEFORMATION AND CONSTRUCTION OF PLATE MOTION EULER PARAMETER IN THE ASIA REGION

作　　者：金双根[1] 朱文耀[1] 

机构地区：[1]中国科学院上海天文台,上海市南丹路80号200030

出　　处：《大地构造与成矿学》2002年第2期138-142,共5页Geotectonica et Metallogenia

基　　金：国家重大基础研究项目(批准号:G1998040703);中科院重要基础研究项目(批准号:KJ951-1-304);上海科技基础发展基金(批准号JC14012)资助项目支助.

摘　　要：板块运动的欧拉参数是表征板块运动的最基本特征。地质模型和独立空间技术实测资料建立的ITRF序列模型都将欧亚板块视为一个整体,由于80%的台站集中在西欧,因此整个欧亚作为一个背景场来研究亚洲区域形变,不能真正反映亚洲板内形变。本文利用国际地球自转服务(IERS)发布的ITRF2000速度场,独立确定亚洲区域板块运动欧拉参数,进而分析亚洲区域现今板内形变,并与地质模型NNR-NUVEL1A和ITRF2000VEL模型得到的结果进行比较,揭示亚洲区域现今运动特征:中南部形变最大,向北逐渐减小,东西向拉伸,南北向收缩;亚洲东部地区相对于亚洲是一稳定的区域;另外亚洲西伯利亚地区不属于亚洲区域块体,而属于独立的稳定的欧亚构造块体,具有刚性块体特征。The Euler parameter of plate motion i s a basic character.The Eurasia plate is taken as a whole body in NNR -NUVEl1A and ITRF model,b ut it cannot really reflect the Asia d eformation based on the background field of Eurasia,because about 80%stations distribute in We stern Europe.In this paper,we construct the Euler parameter of Asia plate motion based on ITRF2000velo city field published by IERS.To analyzing the present-day crustal d eformation in Asia based on the Euler parameter of Asia region reveals the present-day motion character and tr end of Asia:the Asia region is shorte ning in North -South direction and lengthening in West -East direction.Furthermore,the deformation of Ti bet block is largest,it is most unstable in Eurasia plate;the east o f the Asia is more stable with respect to Asia.In addition,Siberian region is a stable tectonic block with a rigid character in Eurasia.

关 键 词：亚洲 板块运动 欧拉参数 板内形变 GPS 欧拉矢量 

分 类 号：P542.4[天文地球—构造地质学]