| INDEPTH-Ⅲ地震层析成像——藏北印度岩石圈俯冲断落的证据 |
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| 关键词:North Tibet Upper Mantle Indian Continent high velocity lithosphere |
| 基金项目:本文由国土资源部项目(9501207)及国家科技部项目(97924) |
| 作者 | 单位 | | 赵文津 | 中国地质科学院,北京,100037 | | 薛光琦 | 中国地质科学院矿产资源研究所,北京,100037 | | 赵逊 | 中国地质科学院,北京,100037 | | 吴珍汉 | 中国地质科学院地质力学研究所,北京,100081 | | 史大年 | 中国地质科学院矿产资源研究所,北京,100037 | | 刘葵 | 中国地质科学院矿产资源研究所,北京,100037 | | 江万 | 中国地质科学院矿产资源研究所,北京,100037 | | 熊嘉育 | 中国地质科学院,北京,100037 | | INDEPTH研究队 | |
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| 摘要: |
| Seismic Imaging of the Subducting Indian Lithosphere beneath North Tibet |
| A tomographic image of the upper mantle beneath Central Tibet from INDEPTH III seismic data has revealed two high velocity layers in the Lower Velocity Zone of the Upper Mantle. It is referred that these two layers are the northward continuation of Indian high velocity lithosphere. While the upper layer was broken down and subsided in its northward extending process beneath the Lhasa Block Lithosphere, the other layer was subducting gently into the asthenosphere under 32°N. It is suggested that the two lo wer velocity belts, located just north of 33°N at different depths, are not related to the deep Lower Velocity Body at 35.5°N disco vered by Wittlinger in 1996, and that they might have originated from another thermo fluid source at 32°N,91°E. |
| ZHAO Wen-jin,XUE Guang-qi,ZHAO Xun,WU Zhen-han,SHI Da-nian,LIU Kui,JIANG Wan,XIONG Jia-yu,INDEPTH Team.2004.Seismic Imaging of the Subducting Indian Lithosphere beneath North Tibet[J].Acta Geoscientica Sinica,25(1):1-10. |
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