Late Cenozoic uplift of southeastern Tibet
Late Cenozoic uplift of southeastern Tibet
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DOI：
10.1130/g21265.1
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发表时间：
2005-06-01
期刊：
影响因子：
5.8
通讯作者：
Tang, W
中科院分区：
文献类型：
--
作者：
Clark, MK;House, MA;Tang, W
西藏东南部地表隆升的年代目前尚不清楚，但主要河流下切的开始可以作为初始隆升时间的替代。高原东部地势较高，东南部边缘地势较缓，高原东部隆起前低海拔缓慢侵蚀、构造抬升速率较低时形成的隆起、低起伏残遗地貌覆盖了高原东部地势较高、东南部边缘地势较缓的地貌。从深河峡谷切割成残留景观的热年代学显示，缓慢冷却之间约。100和CA。10-20 Ma，约10- 20 Ma后转变为快速冷却。13 ALA，在9至13 Ma之间，河流以0.25-0.5毫米/年的速度开始快速下切。西藏东部平均海拔的快速增加，在这个时候开始支持的构造气候模型相关联的横向（东部）在西藏高地形的扩张与晚中新世印度和东亚季风的加强。
The age of surface uplift in southeastern Tibet is currently unknown, but the initiation of major river incision can be used as a proxy for the timing of initial uplift. The topographically high eastern plateau and gently dipping southeastern plateau margin are mantled by an elevated, low-relief relict landscape that formed at a time of slow erosion at low elevation and low tectonic uplift rates prior to uplift of the eastern Tibetan Plateau. Thermochronology from deep river gorges that are cut into the relict landscape shows slow cooling between ca. 100 and ca. 10-20 Ma and a change to rapid cooling after ca. 13 Ala with initiation of rapid river incision at 0.25-0.5 mm/yr between 9 and 13 Ma. A rapid increase in mean elevation of eastern Tibet beginning at this time supports tectonic-climate models that correlate the lateral (eastern) expansion of high topography in Tibet with the late Miocene intensification of the Indian and east Asian monsoons.