Kinematics and 40Ar/39Ar geochronology of the Gaoligong and Chongshan shear systems, western Yunnan, China: Implications for early Oligocene tectonic extrusion of SE Asia

Wang, Yuejun; Wu, Fan; Zhang, Yanhua; Peng, Touping; Chen, Xinyue; Xu, Yi–Gang

doi:10.1016/j.tecto.2006.02.005

Cited by 171 publications

(142 citation statements)

References 38 publications

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“…The southeastern flank of the Tibetan Plateau is deformed by large strike-slip faults the activity of which is likely linked to the surface uplift. Dating of the Red River fault zone shows that motion started ∼34 Ma and was most rapid after 27 and before 17 Ma (45,46) and other faults in this region (e.g., Xianshui He Fault) share similar ages of motion and exhumation (47,48). Lacassin et al (49) note strong shearing and metamorphism of the mountains immediately north of the Yangtze First Bend after 36 Ma, followed by uplift driven by folding around 17 Ma.…”

Section: Tibetan Tectonics and The Yangtze Rivermentioning

confidence: 98%

Pre-Miocene birth of the Yangtze River

Zheng

Clift

Wang

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

258

208

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The development of fluvial systems in East Asia is closely linked to the evolving topography following India-Eurasia collision. Despite this, the age of the Yangtze River system has been strongly debated, with estimates ranging from 40 to 45 Ma, to a more recent initiation around 2 Ma. Here, we present 40 Ar/ 39 Ar ages from basalts interbedded with fluvial sediments from the lower reaches of the Yangtze together with detrital zircon U-Pb ages from sand grains within these sediments. We show that a river containing sediments indistinguishable from the modern river was established before ∼23 Ma. We argue that the connection through the Three Gorges must postdate 36.5 Ma because of evaporite and lacustrine sedimentation in the Jianghan Basin before that time. We propose that the present Yangtze River system formed in response to regional extension throughout eastern China, synchronous with the start of strike-slip tectonism and surface uplift in eastern Tibet and fed by strengthened rains caused by the newly intensified summer monsoon.Asian monsoon | drainage capture | provenance | Subei Basin | Yangtze gravel

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Section: Tibetan Tectonics and The Yangtze Rivermentioning

confidence: 98%

Pre-Miocene birth of the Yangtze River

Zheng

Clift

Wang

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

258

208

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“…To accommodate the southeastward extrusion of Indochina caused by the India-Eurasia collision, the early Cenozoic deformation of SEMTP was dominated by largescale ductile strike-slip shear faults (Fig. 1), such as the right-lateral Gaoligong Shear Zone (Wang et al, 2006), the left-lateral Chongshan and Ailao Shan-Red River Shear Zones (Akciz et al, 2008;Leloup et al, 1995;Zhang et al, 2010), and large-scale clockwise rotations (e. g., Yang and Besse, 1993;Li et al, 2012;Tong et al, 2013). The shear zones were transformed to a series of brittle faults during late Cenozoic (e.g., the Red River fault and the Dali fault system), which may indicate changes in the geodynamic evolution of the Tibetan Plateau (Wang et al, 1998).…”

Section: Geological Settingmentioning

confidence: 99%

Magnetostratigraphy of the Xiaolongtan Formation bearing Lufengpithecus keiyuanensis in Yunnan, southwestern China: Constraint on the initiation time of the southern segment of the Xianshuihe–Xiaojiang fault

Deng

Dong

et al. 2015

Tectonophysics

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The late Cenozoic extensional basins in Yunnan Province (southwestern China), which are kinematically linked with the regional strike-slip faults, can provide meaningful constraints on the fault activity history and tectonic evolution of the southeast margin of the Tibetan Plateau (SEMTP), and further on the geodynamic evolution of the Tibetan Plateau. However, this has been severely impeded by the lack of precise age constraints on the timing of fault activity. To better constrain the timing of fault activity and the tectonic rotation of SEMTP, we undertook a high-resolution magnetostratigraphic study on the Xiaolongtan Formation in the Xiaolongtan Basin, which is located at the southern tip of the Xianshuihe-Xiaojiang fault and is well-known by the presence of hominoid Lufengpithecus keiyuanensis. Rock magnetic experiments indicate that magnetite is the main remanence carrier. Correlation to the geomagnetic polarity timescale was achieved by combining magnetostratigraphic and biostratigraphic data. Our correlation suggests that the Xiaolongtan Formation sedimentary sequence spans from Chron C5Ar.1r to Chron C5n.2n, which indicates that the age of the Xiaolongtan Formation ranges from 10 Ma to 12.7 Ma, and that the ages of the two sedimentary layers possibly bearing the hominoid L. keiyuanensis are~11.6 Ma or~12.5 Ma. The basal age of the sediments is 12.7 Ma, which indicates that the activation of the southern Xianshuihe-Xiaojiang fault was initiated at this time. The overall mean paleomagnetic direction (D = 353.2°, I = 34.2°, α 95 = 2.1°, n = 166) documents a counter-clockwise vertical axis rotation of −8 ± 3°with respect to Eurasia, which is the response to the activity of the left-lateral Xianshuihe-Xiaojiang Fault.

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“…The Gaoligong fault that bounds the Gaoligong granites to the east is a major intracontinental dextral strike-slip fault which possibly accommodates the extrusion of the Tibetan plateau (Wang et al, 2006). The western margin of the Gaoligong belt is Longchuanjiang, which runs parallel to the IndoBurma suture in western Burma.…”

Section: Comparison With Magmatism In the Lhasa Terrane And In Burmamentioning

confidence: 99%

“…Comparatively, pre-and syn-collisional magmatism, especially in eastern Tibet and western Yunnan is still poorly characterized. For this reason, the Gaoligong-Tengliang-Yingjiang (abbreviated as GTY) belt in western Yunnan, a major intracontinental dextral strike-slip fault which possibly accommodates the extrusion of the Tibetan plateau (Wang et al, 2006), is targeted for this study. The GPS data clearly illustrate the eastward motion of the Tibetan Plateau and that it turns south along the Eastern Himalayan Syntaxis (Chen et al, 2000;Wang et al, 2001).…”

Section: Introductionmentioning

confidence: 99%