资源描述：
《西昆仑造山带下岩石圈地幔速度结构》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、第49卷第3期地球物理学报Vol.49,No.32006年5月CHINESEJOURNALOFGEOPHYSICSMay,2006贺日政,赵大鹏,高锐等.西昆仑造山带下岩石圈地幔速度结构.地球物理学报,2006,49(3):778～787HeRZ,ZhaoDP,GaoR,etal.TeleseismicP2wavetomographyoflithosphericmantlebeneathwestKunlunorogenicbelts.ChineseJ.Geophys.(inChinese),2006,49(3):778～787西昆仑造山带下岩石圈地幔速度结构1,2212,32,3贺日政,赵大鹏
2、,高锐,王宝善,齐诚1中国地质科学院地质研究所,北京1000372GeodynamicsResearchCenter,EhimeUniversity,Matsuyama,790-8577,Japan3中国国家地震局地球物理研究所,北京100081摘要在已完成的新疆地学断面研究计划实施中曾在西昆仑山前布置了14个宽频带地震台站.利用记录到的远震P波初至和层析成像方法,研究了西昆仑造山带下的岩石圈地幔结构特征.在已有地震学证据基础上,层析成像结果显示,西昆仑造山带下的高速岩石圈地幔可能是印度岩石圈地幔的俯冲前缘.沿东经80°深度剖面图像显示,在西昆仑造山带下的150～300km处,高速异常的岩石圈
3、地幔前锋与低速异常的塔里木块体岩石圈地幔发生了面对面碰撞.关键词远震P波,层析成像,西昆仑造山带,印度板块岩石圈地幔前锋,塔里木岩石圈地幔文章编号0001-5733(2006)03-0778-10中图分类号P315,P541收稿日期2005-06-02,2005-12-08收修定稿TeleseismicP2wavetomographyoflithosphericmantlebeneathwestKunlunorogenicbelts1,2212,32,3HERi-Zheng,ZHAODa-Peng,GAORui,WANGBao-Shan,QICheng1InstituteofGeology,C
4、hineseAcademyofGeologicalSciences,Beijing100037,China2GeodynamicsResearchCenter,EhimeUniversity,Matsuyama,790-8577,Japan3InstituteofGeophysics,ChinaEarthquakeAdministration,Beijing100081,ChinaAbstract32DseismicvelocitystructureoflithosphericmantlebeneaththewesternKunlunorogenicbeltanditsforelandwaso
5、btainedbyatomographicmethodusingP2wavearrivaltimesfrom86teleseismiceventsrecordedby14broad2bandstations,whichweredeployedbyXinjiangGlobalGeoscienceTransectProjectinthewestKunlunorogenicbeltsandthesouthernmarginofTarimbasinduring1997～19981Combinedwiththepreviousseismologicalstudiesintheregion,ourresu
6、ltsshowthatthelithosphericmantlebeneaththewestKunlunorogenicbeltsisperhapsthefrontierofthesubductedlithosphericmantleoftheIndianPlate.Theimagealong80°EinthestudyareaclearlyshowsthatthelithosphericmantlebeneathwestKunlunorogenicbeltswithhigh2velocityanomalycollidedwiththatoftheTarimblocksinthefrontof
7、EurasiaPlatewithlow2velocityanomaly,inthedepthrangeof150to300km.KeywordsTeleseismicP2wave,Tomography,WestKunlunorogenicbelts,ThefrontieroflithosphericmantleofIndiaPlate,LithosphericmantleofTarim基金项目原地
