| 印度板块俯冲到藏南之下的深反射证据 |
| |
| 关键词:deep seismic reflection Indian plate Asian plate continent-continent collision, |
| 基金项目:国家自然科学基金 |
|
| 摘要点击次数: 3900 |
| 全文下载次数: 2411 |
| 摘要: |
| Deep Seismic Reflection Evidence for Continental Underthrusting beneath Southern Tibet |
| The Himalaya and adjacent Tibetan plateau, constituting Earth's largest region of elevated topography and anomalously thick crust, formed as a consequence of Cenozoic collision between india and Asia-itself considered the archetypal continent-continent collision. Here we rePOrt the first results from an attempt to image the structure of the crust beneath this region using deep seismic reflection profiling. Our￣100km-long profile, acquired in the Tethyan Himalaya, shows a midcrustal reflection that probably marks the active thrust fault along which the indian plate is underthrusting southern Tibet; upper-crustal reflections with geometries suggestive of large-scale structural imbrication of the upper crust; and Moho reflections from the base of the double-normal-thickness crust underlying the region. These results lend substantial support to the view that crustal thickening beneath southernmost Tibet was accomplished by wholesale underthrusting of indian continental crust beneath the structurally imbricated upper crust comprising the Tethyan Himalaya. |
| ZHAO Wen-jin,K. D. Nelson & Project INDEPTH Team.1996.Deep Seismic Reflection Evidence for Continental Underthrusting beneath Southern Tibet[J].Acta Geoscientica Sinica,17(2):131-137. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|