Investigation of the Timing and Strain Magnitude of Late Cretaceous-Tertiary Thrusting in Central and Northern Tibet

西藏中北部晚白垩世-第三纪逆冲作用的时代及应变大小探讨

• 批准号: 0106677
• 负责人: An Yin
• 金额: $ 24.85万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0106677&HistoricalAwards=false
• 关键词: Investigation; Timing; Strain; Magnitude; Late

0106677 Yin & HortonCurrent hypotheses concerning the formation of the Tibetan plateau are widely different in terms of their predicted strain distribution and temporal evolution of the plateau. If the uplift involved little upper crustal shortening and was passively uplifted, shortening strain should be small and synchronous. If the uplift was due to large shortening that doubled the upper crustal thickening, strain should be significant and diachronous across the plateau. This project will attempt to evaluate upper crustal deformation and therefore test these two models for the evolution of the Tibetan plateau. Results are expected to provide new constraints on how and when the Tibetan plateau was constructed and allow various mechanisms for uplifting the plateau to be quantified.

0106677 Yin & Horton 当前关于青藏高原形成的假设在预测的应变分布和高原时间演化方面存在很大差异。 如果隆起涉及的上地壳缩短很少，并且是被动抬升，那么缩短应变应该很小并且是同步的。 如果隆起是由于大幅缩短导致上地壳增厚加倍，那么整个高原的应变应该是显着且历时的。 该项目将尝试评估上地壳变形，从而测试这两个青藏高原演化模型。 预计结果将为青藏高原的形成方式和时间提供新的约束，并允许量化各种抬升高原的机制。