Sedimentary record of Jurassic northward subduction of the Bangong–Nujiang Ocean: insights from detrital zircons

Huang, Tingpei; Xu, Ji‐Feng; Chen, Jianlin; Wu, Jianbin; Zeng, Yunbo

doi:10.1080/00206814.2016.1218801

Cited by 71 publications

(50 citation statements)

References 76 publications

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“…Defining an exact collision age requires more high‐quality middle to late Jurassic and earliest Cretaceous paleomagnetic results from the Qiangtang and Lhasa terranes. Nevertheless, this preliminary conclusion is consistent with the following geological and geochemical evidence: (1) an ophiolitic melange and structurally overlying Jurassic flysch near Shiquanhe were obducted southward onto the margin of the Lhasa terrane during this period (Kapp et al, ), (2) significant crustal shortening in the Qiangtang and Lhasa terranes after the initial Lhasa‐Qiangtang collision has been revealed by mapping and geochronologic studies (Kapp et al, , ; Raterman et al, ), (3) the Jurassic‐Cretaceous sedimentary, metamorphic, and magmatic records from the Lhasa‐Qiangtang collision zone imply that the Bangong‐Nujiang Ocean most likely closed at ~140–130 Ma (Zhu et al, ), and (4) the scarcity of detrital zircons and magmatic records at ~140–130 Ma most likely indicates that the Lhasa‐Qiangtang collision occurred at this time (Huang, Xu¸ et al, ; Li et al, ; Zhu et al, ).…”

Section: Discussionsupporting

confidence: 82%

A Stable Southern Margin of Asia During the Cretaceous: Paleomagnetic Constraints on the Lhasa‐Qiangtang Collision and the Maximum Width of the Neo‐Tethys

Yang

Bian

et al. 2018

Tectonics

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The timing of the north-south collision between two terranes can be determined by the overlap of their paleolatitudes or the change of their convergence rate. For example, the overlapping paleolatitudes of the Lhasa terrane and Tethyan Himalaya and the dramatic decrease in the velocity of the Indian plate are usually ascribed to the India-Asia collision at~55 Ma. However, little is known about the paleolatitudinal evolution and velocity change of the Lhasa terrane resulting from the Lhasa-Qiangtang collision during the Jurassic-Cretaceous period. To better constrain the velocity change of the Lhasa terrane during this period, to constrain when and where the Lhasa-Qiangtang collision occurred, and to assess the distribution of land and sea in the Tethyan realm, we provide a high-quality Cretaceous paleomagnetic pole obtained from the limestone from the western part of the Lhasa terrane, which yields a paleolatitude of~16.8°± 1.9°N for the sampling area (32.2°N, 80.8°E) during the time interval of 113-72 Ma. We compile existing paleomagnetic results from the Lhasa terrane, Qiangtang terrane, Tethyan Himalaya, and India and reveal that the Lhasa-Qiangtang collision most likely occurred at or near the J/K boundary at~19°N for the reference point at (32°N, 88°E) and that the Neo-Tethys reached its maximum width (≥~7450 km) during this period.

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Section: Discussionsupporting

confidence: 82%

A Stable Southern Margin of Asia During the Cretaceous: Paleomagnetic Constraints on the Lhasa‐Qiangtang Collision and the Maximum Width of the Neo‐Tethys

Yang

Bian

et al. 2018

Tectonics

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“…The Mugagangri Group represents the accretionary complex formed during northward subduction of the Bangong‐Nujiang ocean [ Huang et al , ; Li et al , ; Zeng et al , ]. This mélange of the Mugagangri Group in the studied area contains limestone, chert, basalt, and sandstone blocks similar to the mélange in Gaize [ Huang et al , ; Li et al , ; Zeng et al , ], and is widely exposed from west to east to the north of Selingco along the suture zone. The accretion of the Gaaco Formation implies that the deep‐sea edge of the southern Qiangtang basin was disrupted during the growth of accretionary complex.…”

Section: Interpretation and Discussionmentioning

confidence: 99%

Sedimentary and tectonic evolution of the southern Qiangtang basin: Implications for the Lhasa‐Qiangtang collision timing

et al. 2017

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The Mesozoic stratigraphic record of the southern Qiangtang basin in central Tibet records the evolution and closure of the Bangong‐Nujiang ocean to the south. The Jurassic succession includes Toarcian‐Aalenian shallow‐marine limestones (Quse Formation), Aalenian‐Bajocian feldspatho‐litho‐quartzose to feldspatho‐quartzo‐lithic sandstones (shallow‐marine Sewa Formation and deep‐sea Gaaco Formation), and Bathonian outer platform to shoal limestones (Buqu Formation). This succession is truncated by an angular unconformity, overlain by upper Bathonian to lower Callovian fan‐delta conglomerates and litho‐quartzose to quartzo‐lithic sandstones (Biluoco Formation) and Callovian shoal to outer platform limestones (Suowa Formation). Sandstone petrography coupled with detrital‐zircon U‐Pb and Hf isotope analysis indicate that the Sewa and Gaaco formations contain intermediate to felsic volcanic detritus and youngest detrital zircons (183–170 Ma) with εHf(t) ranging widely from +13 to −25, pointing to continental‐arc provenance from igneous rocks with mixed mantle and continental‐crust contributions. An arc‐trench system thus developed toward the end of the Early Jurassic, with the southern Qiangtang basin representing the fore‐arc basin. Above the angular unconformity, the Biluoco Formation documents a change to dominant sedimentary detritus including old detrital zircons (mainly >500 Ma ages in the lower part of the unit) with age spectra similar to those from Paleozoic strata in the central Qiangtang area. A major tectonic event with intense folding and thrusting thus took place in late Bathonian time (166 ± 1 Ma), when the Qiangtang block collided with another microcontinental block possibly the Lhasa block.

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“…n = counted grains. (c) Histograms show the distribution of gravel grain sizes from conglomerate (from measured sections of the Lunpola Basin, see (a) and Figure S1 for the counting locations) and modern riverbeds (see Figure 1b for counting sites (Chapman & Kapp, 2017;Fan et al, 2016;Gehrels et al, 2011, and references therein;Guynn et al, 2012;Huang et al, 2017;Lai et al, 2017;Li et al, 2014;Ma et al, 2017;Ma, Hu, et al, 2018;Meng et al, 2018;Pullen et al, 2008Pullen et al, , 2011Sun et al, 2015;Zhang et al, 2017;Zhang et al, 2011;Zhu et al, 2011). Qt = total quartz; F = total feldspar; L = total lithic grains; CB = continental block; RO = recycled orogen; MA = magmatic arc.…”

Section: Geochronologymentioning

confidence: 99%

Internal Drainage Has Sustained Low‐Relief Tibetan Landscapes Since the Early Miocene

Han

Sinclair

et al. 2019

Geophysical Research Letters

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The timing of formation of the low‐gradient, internally drained landscape of the Tibetan Plateau is fundamental to understanding the evolution of the plateau as a whole. Well‐dated sedimentary records of internal drainage of rivers into lakes are used to reveal the timing of this evolution. Here we redate the youngest continental sedimentary successions of central Tibet in the Lunpola Basin and propose a new age range of ca. 35 to 9 Ma, significantly younger than previously thought. We demonstrate long‐standing internal drainage in central Tibet since the late Eocene and stable sedimentary environments, source regions, and low topographic relief since at least the early Miocene. We suggest that sediment aggradation of internal drainage and reduction of hillslope gradients by erosion dominate the formation of low‐relief landscapes and that the late Cenozoic drainage basins in central Tibet developed in response to flow in the lower crust and/or mantle lithosphere.

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Sedimentary record of Jurassic northward subduction of the Bangong–Nujiang Ocean: insights from detrital zircons

Cited by 71 publications

References 76 publications

A Stable Southern Margin of Asia During the Cretaceous: Paleomagnetic Constraints on the Lhasa‐Qiangtang Collision and the Maximum Width of the Neo‐Tethys

A Stable Southern Margin of Asia During the Cretaceous: Paleomagnetic Constraints on the Lhasa‐Qiangtang Collision and the Maximum Width of the Neo‐Tethys

Sedimentary and tectonic evolution of the southern Qiangtang basin: Implications for the Lhasa‐Qiangtang collision timing

Internal Drainage Has Sustained Low‐Relief Tibetan Landscapes Since the Early Miocene

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