Petrogenesis and tectonic implications of Triassic mafic complexes with MORB/OIB affinities from the western Garzê-Litang ophiolitic mélange, central Tibetan Plateau

Liu, Bin; Ma, Changqian; Guo, Yu-Heng; Xiong, Fuhao; Guo, Pan; Zhang, Xin

doi:10.1016/j.lithos.2016.06.009

Cited by 35 publications

(23 citation statements)

References 103 publications

(141 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Notably, a temporal gap in arc magmatism exists at 345–275 Ma (Figure S2), which has been attributed to a period of “flat subduction” in the NQT (Wang et al, ); an analogous process has been documented beneath the modern Central Andes (e.g., Ramos & Folguera, ). After this period of quiescence, a typical trench–arc–back‐arc system developed in the NQT during the Permian to Middle Triassic, resulting from the rollback of the Longmuco‐Shuanghu Paleo‐Tethyan oceanic slab (e.g., Liu, Ma, Guo, Xiong et al, ; Zhang et al, ).…”

Section: Discussionmentioning

confidence: 99%

Late Permian Bimodal Volcanic Rocks in the Northern Qiangtang Terrane, Central Tibet: Evidence for Interaction Between the Emeishan Plume and the Paleo‐Tethyan Subduction System

Wang

Zhang

et al. 2018

JGR Solid Earth

View full text Add to dashboard Cite

Many studies provide compelling evidence for a fossil mantle plume beneath the Late Permian Emeishan large igneous province located near the southeastern margin of the central Tibetan Plateau, a region associated with the Paleo‐Tethyan subduction system. However, little is known about whether direct plume‐subduction interaction occurred during the Late Permian. Here we report geochronological, mineralogical, geochemical, and Sr‐Nd‐Hf‐O isotopic data for the Late Permian (~259–256 Ma) bimodal volcanic rocks (BVRs) in the northern Qiangtang Terrane (NQT), central Tibet. These BVRs consist mainly of basalts, rhyolites, and rhyolitic tuffs. The rhyolites with A‐type affinity were generated by partial melting of newly underplated basalts. Geochemical and isotopic data suggest that two components (ocean island basalt‐type mantle and subducted sediment‐derived fluid) were involved in the generation of the basalts in an extensional back‐arc region. Considering the Permian tectonic evolution of the NQT, we propose that this enriched ocean island basalt‐type mantle was distinct from the Paleo‐Tethyan depleted upper mantle. It most likely originated from Emeishan‐plume material that flowed westward from the South China Block to the nearby NQT, driven by slab rollback‐induced counterflow. The presence of high‐temperature A‐type rhyolites in bimodal back‐arc magmatism also indicates a special subduction setting influenced by a nearby plume. Thus, we propose that the Late Permian BVRs were the result of interaction between the Emeishan plume and the Paleo‐Tethyan subduction system.

show abstract

Section: Discussionmentioning

confidence: 99%

Late Permian Bimodal Volcanic Rocks in the Northern Qiangtang Terrane, Central Tibet: Evidence for Interaction Between the Emeishan Plume and the Paleo‐Tethyan Subduction System

Wang

Zhang

et al. 2018

JGR Solid Earth

View full text Add to dashboard Cite

show abstract

“…The oldest age obtained from ophiolites in the Ailaoshan Suture, the south‐eastern extension of the Jinshajiang Suture, is 383 Ma (Jian et al, ), whereas the mafic blocks with OIB affinity in the Jinshajiang Suture have ages that range from Late Silurian to Late Permian (Figure i–l; 422, 336, 272, and 255 Ma). These age correlations combined with the youngest age of a Triassic ophiolite (232 Ma; N. Zhang et al, ) and the age of OIB (236 Ma; B. Liu, Ma, Guo, et al, ) in the Jinshajiang Suture contribute to the evolution history of the Palaeotethyan Ocean.…”

Section: Long‐lived Accretionary Evolution Of the Jinshajiang Palaeotmentioning

confidence: 99%

“…He et al (, ) suggested that the Northern Qiangtang terrane has a Precambrian basement based on these metamorphic Pan‐African rocks. The ages of the magmatic arcs near the Jinshajiang Suture show a westward younging from 287–255 Ma (Fan et al, ; Lai, Meffre, Crawford, Zaw, Xue, et al, ), 266–235 Ma (Jian et al, ; T. N. Yang et al, ), and to 237–208 Ma (Y. Liu et al, , B. Liu, Ma, Guo, et al, ; Q. Wang et al, ; T. N. Yang et al, ; H. R. Zhang, Yang, Hou, Song, Chen, et al, ; Zhao et al, ). However, the tectonic environment of Carboniferous–Triassic volcanic rocks in the Northern Qiangtang terrane is still not clear (Figure ).…”

Section: Geological Setting and Sample Descriptionmentioning

confidence: 99%

“…Simplified tectonic map of the Tibetan Plateau showing major terranes, suture zones, Carboniferous–Triassic magmatic rocks, and basement rocks. Modified after Yin and Harrison (), Ding et al (), L. Y. Zhang et al (), B. Liu, Ma, Guo, et al (). Note that the mafic blocks with OIB affinity along Jinshajiang Suture are labelled with ages; the study area is marked with white dashed rectangle [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Late Silurian to Late Triassic seamount/oceanic plateau series accretion in Jinshajiang subduction mélange, Central Tibet, SW China

et al. 2019

View full text Add to dashboard Cite

The timing of the initial opening and subduction of the Palaeotethyan Ocean is currently highly debated, in particular regarding the Jinshajiang Ocean in the central Tibetan Plateau. This study presents four well‐constrained U–Pb zircon ages (422.4 ± 6.1, 336.4 ± 7.4, 272.3 ± 2.8, and 255.8 ± 3.4 Ma) of mafic blocks in the Jinshajiang Suture. These mafic blocks have a chemical oceanic island basalt (OIB) affinity. These facts, together with previously published data (236 Ma OIBs), may be interpreted as a series of seamounts/oceanic plateaux varying from Late Silurian to Late Triassic, which were accreted early in the subduction–accretion process. An andesite from the Jinshajiang Suture with continental arc characteristics yielded a zircon U–Pb weighted average age of 385.2 ± 6.6 Ma, implying that the subduction initiation may have occurred at least in the Middle Devonian. Our work suggests a long‐lived continuous accretion, which also puts an earlier initial opening time than previously thought. Taking into account the above data and integrated with relevant published information, we favour a long‐lived accretionary process accompanied with seamounts/oceanic plateaux, which provides robust new evidence for subduction‐related continental growth in the central Tibetan Plateau.

show abstract

“…Figure DR5 Plots of (a) Ti versus V (Shervais, 1982) and (b) Nb/Yb versus Th/Yb (Pearce et al, 2008). Data sources: basalts in the SQT (this study); basalts in the GLS (Liu et al, 2016); basalts in the Okinawa trough (Shinjo et al, 1999); basalts in the Mariana trough (Pearce et al, 2005). BABB, back-arc basin basalt.…”

Section: Figure Dr1mentioning

confidence: 99%

Supplemental Material: Passive-margin magmatism caused by enhanced slab-pull forces in central Tibet

DAN¹,

al.²

2020

Preprint

View full text Add to dashboard Cite

show abstract

Petrogenesis and tectonic implications of Triassic mafic complexes with MORB/OIB affinities from the western Garzê-Litang ophiolitic mélange, central Tibetan Plateau

Cited by 35 publications

References 103 publications

Late Permian Bimodal Volcanic Rocks in the Northern Qiangtang Terrane, Central Tibet: Evidence for Interaction Between the Emeishan Plume and the Paleo‐Tethyan Subduction System

Late Permian Bimodal Volcanic Rocks in the Northern Qiangtang Terrane, Central Tibet: Evidence for Interaction Between the Emeishan Plume and the Paleo‐Tethyan Subduction System

Late Silurian to Late Triassic seamount/oceanic plateau series accretion in Jinshajiang subduction mélange, Central Tibet, SW China

Supplemental Material: Passive-margin magmatism caused by enhanced slab-pull forces in central Tibet

Contact Info

Product

Resources

About