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1、地震概论现今地震学前沿一例&课程总结2008.5.12地震概论一、现今地震学前沿一例青藏高原东部区域地震层析成像地震层析成像地震层析成像(Seismic Tomography)地震层析成像地震层析成像(Seismic Tomography)Regional Seismic Tomography in Eastern Tibetan PlateauDING Zhifeng1), ZHAO Dapeng2)XUE Guangqi 3), LI Guiyin1), WANG Hui 1) 1) Institute of Geophysics, CEA, China 2) GRC, Ehime Uni
2、versity, Japan 3) Chinese Academy of Geological Sciences Outlines Introduction Data and Methods Results ConclusionsGeologic setting map of Tibetan PlateauThe models of India-Eurasian collisionThe models of India-Eurasian collision（Willet, 1996）Data and MethodsData (1)Temporary Seismic Stations PASSC
3、AL (Tibet) INDEPTH I, II, III (Tibet) YL (Himalaya, Nepal, Tibet) XA (Bhutan) HICLIMB (Himalaya) Sino-France (Qinghai) CDSNData (2)Permanent Seismic StationsSeismic networks of Tibet, Qinghai, Gansu, Sichuan, Yunnan provincesWWSSN stations (ISC)Used of the data: 984 local and regional events , 19152
4、 arrivals; 102 teleseismic events, 2470 arrivals.Tomography MethodsZhao D., Hasegawa A., Horiuchi S., 1992;Zhao D., Hasegawa A., Kanamori H., 1994.Seismograph InstallmentSource ParametersSource Parameters Explosive Charge: 4002000kgExplosive Charge: 4002000kg Well Depth: 3035m Well Depth: 3035m Well
5、 Spacing: 15 20m Well Spacing: 15 20mModel parameterizationGrid interval:1 in horizontal, 20-30 km in depthFrom Model Crust2.0 (Laske, Masters and Reif)ResultsTilmann, 2003Kind, 2002Epicenters of the teleseismic eventsThe models of India-Eurasian collisionThe models of India-Eurasian collision（Wille
6、t, 1996）ConclusionsConclusions (1)Seismic images obviously show the subduction and collision structures of the Indian plate and the Eurasian plate.The Indian lithosphere underthrusts up to the Bangong-Nujiang Suture. Conclusions (2)The collision structure is different in southern Tibet between the t
7、wo sides of the longitude of 91E.The Indian crust and mantle delamination（分层，分页） occurs during the collision process.End of Research ExampleThank you!补充：卫星干涉测位移地震概论二、课程总结地震概论总结一、自然科学的典型，学习了基本原理和方法，举例介绍了当今前沿及其他多个方面的地学知识，扩大选者的知识面二、严格贯彻学校素质教育的理念，安排课间讲座弥补自然科学课程的“不足”地震概论总结三、开课两年，日趋壮大、完善四、全身心投入。经费投入120地震概
8、论总结五、多媒体、教学网、实物演示、图书馆讨论和资料片观赏结合六、锐意教改：有所为、有所不为，为课程准确定位地震概论总结七、站在选课学生的角度完成各项教学任务，真正做到以学生为本八、与悬念说再见、杜绝冤枉、没有委屈。公正对待每一位选课同学。我们会尽快督促教务或者亲自录入成绩，大家很快会从教务部（或平台）网络查到。考试总结考什么？讨论分组 没有组的同学有下列各组供选，请选择一组！最后，没有组的同学将强制成组！组别组别题目题目时间时间地点地点1 1地震预报的地震预报的可能性及其可能性及其社会效应社会效应1313日（周三）日（周三）晚晚9 9：00001010：0000北京大学北京大学图书馆图书馆2052052 2地震震级的地震震级的确定确定1414日（周三）日（周三）晚晚9 9：00001010：0000北京大学北京大学图书馆图书馆205205
