The 2008 Wenchuan earthquake and active tectonics of Asia

Fu, Bihong; Walker, Richard; Sandiford, Mike

doi:10.1016/j.jseaes.2011.01.003

Cited by 18 publications

(4 citation statements)

References 63 publications

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“…Map of major active strike‐slip and normal faults in the Tibetan Plateau, adapted from Styron et al (2010) and Fu et al (2011). The estimated initiation age of each fault system is denoted, along with abbreviated names.…”

Section: Discussionmentioning

confidence: 99%

The Cenozoic Evolution of Crustal Shortening and Left‐Lateral Shear in the Central East Kunlun Shan: Implications for the Uplift History of the Tibetan Plateau

et al. 2020

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The timing of crustal shortening and strike-slip faulting along the East Kunlun Shan provides insight into the history of surface uplift and may constrain the time at which the Tibetan Plateau reached high elevations. We investigate a series of extensional basins and restraining bends along the Xidatan strand of the Kunlun strike-slip fault, which provide an ideal setting to unravel the tectonic history of the northern plateau margin. We present new apatite (U-Th)/He, apatite fission track, and zircon (U-Th)/He ages and QTQt thermal modeling, 40 Ar/ 39 Ar fault gouge dating, and structural mapping from the central East Kunlun Shan. Our data suggest that the East Kunlun Shan experienced slow to negligible exhumation until late Cretaceous time, followed by an increase in rate by 65-50 Ma. Along with a~47 Ma fault gouge age, we posit that the Paleocene-early Eocene was a time of crustal shortening along the northern plateau. Rapid exhumation along transpressional portions of the Xidatan fault initiated by 23-20 Ma, which we interpret as the local onset of strike-slip faulting. An early Miocene transition from north-south crustal shortening to left-lateral shear along the East Kunlun Shan, the onset of normal and strike-slip faulting in central and southern Tibet by 18 Ma, and lower crustal flow in eastern Tibet by 13 Ma suggest the establishment of orogen-wide east-west oriented extension and extrusion by the middle Miocene. The plateau-wide shift in stress accommodation implies that high gravitational potential energy, and likely high elevation, was attained by the middle Miocene.

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Section: Discussionmentioning

confidence: 99%

The Cenozoic Evolution of Crustal Shortening and Left‐Lateral Shear in the Central East Kunlun Shan: Implications for the Uplift History of the Tibetan Plateau

et al. 2020

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“…Cenozoic deformation mainly produced a crustal scale shear zone and décollement between the Precambrian basement and the cover sequences, regional thrust faults and folds, and strike-slip fault zones. Figure 1 shows the tectonic setting of the Tibetan Plateau and the surrounding area, modified from the previous studies [33][34][35]. As shown in Figure 1, this study area is composed of the blocks of Altyn Tagh-East Kunlun-Qilian terrane, Songpan-Ganzi terrane, North Qiangtang terrane, South Qiangtang terrane, Lhasa terrane and Himalayan terrane, from north to south.…”

Section: Study Areamentioning

confidence: 99%

Regional Lithological Mapping Using ASTER-TIR Data: Preliminary Case Study for the Tibetan Plateau and the Surrounding Area

Ninomiya

2016

Preprint

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Abstract:The mineralogical indices; the Quartz Index (QI), Carbonate Index (CI) and Mafic Index (MI) for ASTER multispectral thermal infrared (TIR) data were applied to various geological materials for regional lithological mapping on the Tibetan Plateau. Many lithological and structural features are not currently well understood in the central Tibetan Plateau, including the distribution of mafic-ultramafic rocks related to the suture zones, the quartzose and carbonate sedimentary rocks accreted to the Eurasian continent, and sulfate layers related to the Tethys and neo-Tethys geological setting. These rock types can now be mapped with the interpretation of the processed ASTER TIR images described in this paper. A methodology is described for the processing of ASTER TIR data applied to a very wide region of the Tibetan Plateau. The geometrical and radiometric performance of the processed images is discussed, and the advantages of using ortho-rectified data are shown. The challenges of using ASTER data with small footprint in addition to selecting an appropriate subset of scenes are also examined. ASTER scenes possess a narrow swath width when compared to LANDSAT data (60 km vs. 185 km respectively). Furthermore, the ASTER data archive is vast consisting of approximately 3 million images. These details can present an added level of complexity during an image processing workflow. Finally, geological interpretations made on the maps of the indices are compared with prior geological field studies. The results from the investigations suggest that the indices perform well in the classification of quartzose rocks based on the carbonate and the mafic mineral content, in addition to the granitic rocks based on the feldspar content.

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“…For example, it was observed that the emissivity minima due to Si-O stretching vibrations (i.e., reststrahlen bands) moved to longer wavelengths as the composition of the target igneous rocks changed from felsic to ultramafic [6]. Figure 1 shows the tectonic setting of the Tibetan Plateau and the surrounding area, modified from the previous studies [33][34][35]. As shown in Figure 1, this study area is composed of the blocks of the Altyn Tagh-East Kunlun-Qilian terrane, Songpan-Ganzi terrane, North Qiangtang terrane, South Qiangtang terrane, Lhasa terrane and Himalayan terrane, from north to south.…”

Section: Introductionmentioning

confidence: 99%

Regional Lithological Mapping Using ASTER-TIR Data: Case Study for the Tibetan Plateau and the Surrounding Area

Ninomiya

2016

Geosciences

Self Cite

View full text Add to dashboard Cite

The mineralogical indices the Quartz Index (QI), Carbonate Index (CI) and Mafic Index (MI) for ASTER multispectral thermal infrared (TIR) data were applied to various geological materials for regional lithological mapping on the Tibetan Plateau. Many lithological and structural features are not currently well understood in the central Tibetan Plateau, including the distribution of mafic-ultramafic rocks related to the suture zones, the quartzose and carbonate sedimentary rocks accreted to the Eurasian continent, and sulfate layers related to the Tethys and neo-Tethys geological setting. These rock types can now be mapped with the interpretation of the processed ASTER TIR images described in this paper. A methodology is described for the processing of ASTER TIR data applied to a very wide region of the Tibetan Plateau. The geometrical and radiometric performance of the processed images is discussed, and the advantages of using ortho-rectified data are shown. The challenges of using ASTER data with a small footprint in addition to selecting an appropriate subset of scenes are also examined. ASTER scenes possess a narrow swath width when compared to LANDSAT data (60 km vs. 185 km, respectively). Furthermore, the ASTER data archive is vast, consisting of approximately three million images. These details can present an added level of complexity during an image processing workflow. Finally, geological interpretations made on the maps of the indices are compared with prior geological field studies. The results from the investigations suggest that the indices perform well in the classification of quartzose rocks based on the carbonate and mafic mineral content, in addition to the granitic rocks based on the feldspar content.

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The 2008 Wenchuan earthquake and active tectonics of Asia

Cited by 18 publications

References 63 publications

The Cenozoic Evolution of Crustal Shortening and Left‐Lateral Shear in the Central East Kunlun Shan: Implications for the Uplift History of the Tibetan Plateau

The Cenozoic Evolution of Crustal Shortening and Left‐Lateral Shear in the Central East Kunlun Shan: Implications for the Uplift History of the Tibetan Plateau

Regional Lithological Mapping Using ASTER-TIR Data: Preliminary Case Study for the Tibetan Plateau and the Surrounding Area

Regional Lithological Mapping Using ASTER-TIR Data: Case Study for the Tibetan Plateau and the Surrounding Area

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