Petrogenesis of the Late Triassic Biluoxueshan granitic pluton, SW China: Implications for the tectonic evolution of the Paleo-Tethys Sanjiang Orogen

Chen, Qi; Wang, Changming; Bagas, Leon; Du, Bin; Shi, Kangxing; Yang, Lifei; Zhu, Junjiang; Duan, Hongyu

doi:10.1016/j.jseaes.2021.104700

Cited by 11 publications

(2 citation statements)

References 106 publications

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“…(a) Simplified tectonic framework of the Sanjiang Orogen and its adjacent areas (modified after Metcalfe, 2002; Wang, Deng, Carranza, & Lai, 2014; Yan et al, 2020; Chen, Wang, Bagas & Du, 2021; Chen et al, 2022). (b) Sanjiang Orogen showing the distribution of early Palaeozoic to Cenozoic igneous rocks and major porphyry Cu(‐Mo‐Au) deposits (modified after Wang et al, 2016; Du, Yang, et al, 2022)…”

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confidence: 99%

Petrogenesis of the Eocene Yulong potassic intrusion in non‐subduction setting in the Sanjiang Tethys

Zi-an

Wang

et al. 2022

Geological Journal

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The giant Yulong porphyry Cu (‐Mo‐Au) deposit was formed in a post‐collisional setting in eastern Tibet, which is associated with Eocene potassic to ultrapotassic felsic intrusive rocks. The origin of the Yulong potassic intrusion remains highly disputed. Hence, we present new zircon U–Pb ages, whole‐rock geochemistry and zircon Lu‐Hf isotopes for the Yulong intrusion. Zircon U–Pb dating from the porphyritic monzogranite and porphyritic quartz monzonite yield ages of 41.1 ± 0.2, 40.8 ± 0.1 and 40.5 ± 0.2 Ma, respectively. Samples from the Yulong intrusion exhibit high K2O (4.13–4.85%), and high K2O/Na2O (1.00–1.25), [La/Yb]n (30.37–40.37) and Sr/Y (57.86–87.68) ratios, low Mg#, MgO, Ni, and Cr contents, enrichment in light rare earth elements (LREEs) and depletion of high‐field‐strength elements (HFSEs, e.g., Nb, Ta, and Ti). Zircon grains from this study have mostly positive εHf(t) values (+1.6 to +2.9), and crustal model ages (TDMC) of 0.90–1.19 Ga. These features suggest that the Yulong intrusion is derived from a thickened juvenile lower crust. During the Permian to late Triassic, Jinshajiang‐Ailaoshan Palaeo‐Tethyan oceanic subduction from the eastern margin of the North Qiangtang produced metasomatic domains within the continental lithospheric mantle and lower crust. During the late Eocene, the continuing India‐Asia continental collision may have preferentially overthickened the crust. Convective removals in the lower part of the thickened lithosphere resulted in the hot asthenosphere upwelling along the Jinshajiang‐Ailaoshan Suture, which induced the partial melting of the residual metasomatized lithospheric mantle, as well as the thickened lower crust in the Eocene, which formed the Yulong intrusion.

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Section: Introductionmentioning

confidence: 99%

Petrogenesis of the Eocene Yulong potassic intrusion in non‐subduction setting in the Sanjiang Tethys

Zi-an

Wang

et al. 2022

Geological Journal

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“…Sediment-hosted Pb-Zn deposits are major sources of Pb and Zn and significant sources of Ag and Ge, whereas Cu mineralization is generally rare yet economically important [1][2][3][4][5]. Such Pb-Zn deposits rich in Cu-Co and hosted in siliciclastic and dolomitic rocks often have mixed mineralizing fluid sources, such as basinal brines relating to magmatic-hydrothermal or metamorphic fluids [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Genesis of the Baiyangping Cu–Co and Pb–Zn Mineralizations in Lanping Basin, SW China

et al. 2022

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The Oligocene to Miocene Baiyangping Cu–Co and Pb–Zn mineralization was deposited during the collision of the India and Asia continents. The mineralization is hosted in veins in faulted carbonate and clastic rocks, which act as fluid pathways. A detailed fluid-inclusion analysis and C–O–S isotopic study are reported, focusing on the origin of the mineralizing fluids and mineralizing processes. The microthermometry of fluid inclusions hosted in quartz and carbonates indicate that the fluid peak temperature for both Cu–Co and Pb–Zn mineralizations ranges from 160 to 200 °C and from 120 to 160 °C, respectively. During these metallogenic hydrothermal events, salinity evolved from 2.7 wt% NaCl equiv to 24.8 wt% NaCl equiv. The δ34S values measured on sphalerite and tennantite range from +5.2‰ to +9.5‰, which indicates that sulfur originated from a reservoir characterized by thermochemical sulfate reduction (TSR). The C–O isotopic values obtained from the carbonate samples suggest that the fluid mainly originates from basinal brines. The combination of C and S isotopic values of the Cu–Co and Pb–Zn mineralization indicate the sedimentary source of the basin. Mineralization is controlled by faults, thermochemical sulfate reduction, and the physicochemical conditions of the fluid.

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Fragmentary records from the breakup of Rodinia to the closure of the Paleo-Tethys Ocean: new evidence from the Gicha Complex in the middle Sanjiang Tethyan Orogen, SW China

Chen,

Wang,

et al. 2024

Int J Earth Sci (Geol Rundsch)

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Petrogenesis of the Late Triassic Biluoxueshan granitic pluton, SW China: Implications for the tectonic evolution of the Paleo-Tethys Sanjiang Orogen

Cited by 11 publications

References 106 publications

Petrogenesis of the Eocene Yulong potassic intrusion in non‐subduction setting in the Sanjiang Tethys

Petrogenesis of the Eocene Yulong potassic intrusion in non‐subduction setting in the Sanjiang Tethys

Genesis of the Baiyangping Cu–Co and Pb–Zn Mineralizations in Lanping Basin, SW China

Fragmentary records from the breakup of Rodinia to the closure of the Paleo-Tethys Ocean: new evidence from the Gicha Complex in the middle Sanjiang Tethyan Orogen, SW China

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