The Taiwan mountain belt provides a key example for analyzing the relation between morphology and tectonics in an active compressional environment. There is a striking geometrical relationship between the location of salients and reentrants of the mountain belt and the presence of major crustal inhomogeneities such as structural highs in the foreland basin. Major along-strike variations of structural styles occur in range-front rock units of the fold-thrust belt. Stream-gradient and hypsometric analysis has been carried out to highlight the along-strike variations of morphotectonic features and to illustrate the relative activities in different tectonic regimes of the Western Foothills. The normalized stream length-gradient index (SL index) and the Hack profile are two of the stream-gradient indices that effectively reflect the tectonic uplift in a region. De-trending and residual analysis of the hypsometric integral (HI) eliminates the spatial dependency of small drainage basins, and the residual hypsometric integral corresponds to differential uplift activity. Integration of stream-gradient indices and hypsometry provides more robust tectonic interpretation. Five morphotectonic provinces have been identified in the Western Foothills based on stream-gradient indices and hypsometry. Each province is bounded by a series of N140°E-trending transfer fault zones, either inherited from the Eurasian passive margin and/or newly formed in the sedimentary cover in response to the presence of basement highs within the foreland basin (the Peikang and Kuanyin highs). The morphotectonic features as well as deformation styles vary within each province. A high uplift but low shortening rate typifies the crustal deformation style in the transpressional regime north of the Peikang Basement High. On the contrary, a low uplift but high shortening rate characterizes the crustal deformation style in the transtensional regime south of the Peikang Basement High. The higher geomorphic indices suggest that greater tectonic activity occurs in central than in southwestern Taiwan. This inference is also supported by the coseismic deformation of the 1999 Chi-Chi earthquake.

Along-Strike Variations of Morphotectonic Features in the Western Foothills of Taiwan : Tectonic Implications Based on Stream-Gradient and Hypsometric Analysis

Understanding the geologic evolution of Northern Tibetan Plateau with multiple thermochronometers

Spatial variation in Meso-Cenozoic exhumation history of the Longmen Shan thrust belt (eastern Tibetan Plateau) and the adjacent western Sichuan basin: Constraints from fission track thermochronology

Cenozoic magnetostratigraphy of the Xining Basin, NE Tibetan Plateau, and its constraints on paleontological, sedimentological and tectonomorphological evolution

Neogene Expansion of the Qilian Shan, North Tibet: Implications for the Dynamic Evolution of the Tibetan Plateau

The uplift processes of the Qilian Shan (northern Tibetan Plateau) play a central role in our understanding of the dynamics of outward and upward growth of Tibet due to sustained convergence of the Indian and Asian plates. We employ apatite fission track chronology and geological mapping to reveal the time and pattern of the deformation along the Qilian Shan. Our results indicate that the emergence of the Tuolai Shan in the central Qilian Shan occurred at 17–14 Ma, that northern Qilian Shan thrusting began at 10–8 Ma, and that the Laojunmiao anticline formed ca. 3.6 Ma. Together with previous results that show that uplift of the southern Qilian Shan began in the Oligocene, we suggest that the Qilian Shan has undergone progressively northward expansion in the Cenozoic due to significant crustal shortening driven by Qilian Shan thrust fault systems.

/pdf/progressive-northward-growth-of-the-northern-qilian-shan-3ooendp12e.pdf

Progressive northward growth of the northern Qilian Shan-Hexi Corridor (northeastern Tibet) during the Cenozoic

Along-strike topographic variation of the Longmen Shan and its significance for landscape evolution along the eastern Tibetan Plateau

Multistage Exhumation in the Catchment of the Anninghe River in the SE Tibetan Plateau: Insights From Both Detrital Thermochronology and Topographic Analysis

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Progressive northward growth of the northern Qilian Shan-Hexi Corridor (northeastern Tibet) during the Cenozoic

Along-strike topographic variation of the Longmen Shan and its significance for landscape evolution along the eastern Tibetan Plateau

Multistage Exhumation in the Catchment of the Anninghe River in the SE Tibetan Plateau: Insights From Both Detrital Thermochronology and Topographic Analysis