Arc tempos of the Gangdese batholith, southern Tibet

Ma, Xuxuan; Attia, Snir; Cawood, Tarryn; Cao, Wenrong; Xu, Zhiqin; Li, Haibing

doi:10.1016/j.jog.2022.101897

Cited by 17 publications

(16 citation statements)

References 160 publications

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“…Arcs are the site of voluminous continental crust formation and extensive reworking of the lithosphere from the surface to the mantle wedge, with deformation playing a key role in this physical-chemical evolution (Taylor and McLennan, 1995;Hildreth and Moorbath, 1988;Asmerom et al, 1991;Ducea and Barton, 2007;DeCelles et al, 2009;Paterson and Ducea, 2015;Sauer et al, 2017;Attia et al, 2020;Ma et al, 2022). Crustal thickening, arc root growth and loss, exhumation, and surface uplift as well as orogen-normal migration of the arc thermal and magmatic axes operate at rates of as much as kilometers per million years (Chen and Moore, 1982;Paterson and Tobisch, 1992;Kay et al, 2005;Cecil et al, 2012Cecil et al, , 2018Rusmore et al, 2013;Ardill et al, 2018).…”

Section: ■ Introductionmentioning

confidence: 99%

Spatiotemporally heterogeneous deformation, indirect tectonomagmatic links, and lithospheric evolution during orogenic activity coeval with an arc flare-up

et al. 2022

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Broad overlap between deformation and magmatism in active margins has spurred the development of a conceptual framework of direct tectonomagmatic links in both active and ancient arcs. Although widespread and highly influential, such models have only rarely been critically evaluated. Rigorously linking tectonism, geodynamics, lithospheric evolution, and arc activity requires detailed reconstructions of the spatiotemporal patterns of magmatism and deformation across both a sufficiently wide area and a range of observational scales. Herein, new constraints on the timing, extent, and characteristics of deformation during mid-Cretaceous tectonism in the central Sierra Nevada (eastern California, USA) are synthesized with published geologic mapping, structural studies, and geochronology to create an updated reconstruction of one of the type examples of a hot, magma-rich orogen. Tilted strata, tectonic fabrics, and shear zones with variable geometries, kinematics, intensity, and timing reveal a significantly revised record of ~25 m.y. of heterogeneous deformation ca. 105–80 Ma. Deformation and magmatism show distinct and unrelated spatiotemporal patterns throughout this orogenic episode. Contrary to previous models of direct tectonomagmatic links, many of which were developed in the central Sierra Nevada, arc activity did not control the location, intensity, or kinematics of intra-arc deformation, nor did shear zones control the location of magmatism. Furthermore, arc lithosphere appears to have strengthened, rather than weakened, as the arc-orogenic flare-up proceeded. In addition to changing plate-scale boundary conditions, lithospheric-scale rheological evolution likely played a key role in the patterns of Late Cretaceous deformation observed across strike of the entire Cordilleran margin.

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Section: ■ Introductionmentioning

confidence: 99%

Spatiotemporally heterogeneous deformation, indirect tectonomagmatic links, and lithospheric evolution during orogenic activity coeval with an arc flare-up

et al. 2022

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“…The EMP data of biotites are listed in Table S5, and the results show SiO 2 contents in the range of wt%, Al 2 O 3 of 14.24-14.85 wt%, (Figure 8; Tables S7 and S8; Ma et al, 2022;Zhu et al, 2015Zhu et al, , 2019. Compared with the Late Cretaceous (90 ± 5 Ma) magmatism, the intrusive rocks emplaced at the Eocene (50 ± 3 Ma) were more widely distributed.…”

Section: Mineral Geochemistrymentioning

confidence: 99%

“…The volcanic successions could be divided into several groups, such as the Jurassic Yeba (Huang et al, 2015;Wei et al, 2017;Zhu et al, 2008), the Jurassic-Cretaceous Sangri volcanic-sedimentary successions (Huang et al, 2015;Kang et al, 2014) and the Cenozoic Linzizong volcanic rocks (Huang et al, 2015(Huang et al, , 2019Liu et al, 2022;Zhang et al, 2022;Zhu et al, 2015). Zircon U-Pb dating show two intense pulses of magmatic activity at 90 ± 5 Ma and 50 ± 3 Ma in the Gangdese Batholith (Ma et al, 2022;Tian et al, 2022;Zhang et al, 2019;Zhu et al, 2019).…”

Section: Geological Settingmentioning

confidence: 99%

“…Magmatic records are essential for deciphering the continental lithosphere evolution mechanisms within a collisional orogenic belt (Huang et al, 2019). As part of the Tibetan Plateau, the Lhasa Terrane is widely accepted as a Mesozoic Andean‐type convergent margin associated with the northward subduction of the Neo‐Tethyan oceanic lithosphere and an archetype of a Cenozoic collisional orogen related to the India–Asia collision (Chung et al, 2005; Coulon et al, 1986; Hou et al, 2004; Huang, Xu, et al, 2020; Huang, Rooney, et al, 2020; Ji et al, 2009, 2014; Ma et al, 2022; Miller et al, 1999; Williams et al, 2001; Zhu et al, 2011, 2015, 2018). The extensive Eocene magmatism in the Lhasa Terrane occurred during the transition period from the oceanic subduction to the continental collision, which is of great importance for clarifying the geological processes of the collisional orogenic belt.…”

Section: Introductionmentioning

confidence: 99%

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Petrogenesis of the Quxu intrusive complex: Implications for Eocene magmatism in the southern Lhasa Terrane, Tibet

Guan

Woo

et al. 2023

Geological Journal

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The widely distributed Eocene mafic microgranular enclaves in the Lhasa Terrane of southern Tibet carry important information regarding crust–mantle interactions in collisional zones. Here, we report geochronological and geochemical data of granitoids and mafic enclaves from Quxu in the southern Lhasa Terrane. Zircon LA‐ICP‐MS U–Pb dating indicates that the Quxu granitoids and enclaves were synchronously emplaced at ca. 50 Ma. The granitoids are medium‐ to high‐K calc‐alkaline, metaluminous (A/CNK = 0.82–0.90) and have high Al2O3 (14.48–16.57 wt%) and low MgO (2.81–2.99 wt%). The mafic enclaves (SiO2 = 50.55–54.57 wt%) have 5.12–5.37 wt% MgO and an Mg# of 49–51, with weakly negative Eu anomalies (Eu/Eu* = 0.85–0.91). The Quxu granitoids and enclaves have similar zircon Hf isotopic compositions, with εHf(t) values ranging from +7.62 to +13.32. A comprehensive study of the data available for coeval rocks from the Gangdese Batholith indicates that the Quxu granitoids were derived from partial melting of the lower crust, while the parental magmas of the mafic enclaves were most likely derived from lithospheric mantle beneath southern Tibet. The Quxu granitoids are interpreted as the result of mixing between the lower crust‐derived melts and lithospheric mantle‐derived mafic melts, which are likely the magmatic response to the breakoff of the Neo‐Tethyan Oceanic slab at about 50 Ma.

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“…As a clean, low-carbon, stable, and continuous noncarbon-based energy source, the use of geothermal resources is indispens-able to achieve the goals of carbon peak and neutrality [1]. Tibet is the most geothermally active region and accounts for nearly a quarter of over 3,000 identified hydrothermally active areas in China [2,3].…”

Section: Introductionmentioning

confidence: 99%

Hydrogeochemical Characteristics and Genesis of the Chazi Geothermal Field Area in Tibet

Song¹,

Lang

Zhong³

et al. 2022

Geofluids

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The Chazi geothermal field area is located in the large region of Shigatse in southern Tibet. The geothermal resources in this area are abundant, but their exploitation and utilization are low. By studying the water chemistry and isotope characteristics of geochemical fluids in the study area, information on water chemistry, heat storage temperature, recharge source, recharge elevation, and circulation depth was obtained. These results provide a scientific theoretical basis for improving the genetic mechanism of high-temperature geothermal systems in the study area. The type of geothermal fluid hydrochemicals in this area is mainly HCO3–Na. The isotopic geochemical method was used to determine that the recharge source of geothermal fluids was atmospheric precipitation, and the recharge elevation was 5200–6000 m. The geochemical thermometer, Na–K–Mg equilibrium diagram, and silica-enthalpy mixed model indicated the shallow and deep thermal storage temperatures of approximately 150 and 200°C, respectively, and the average circulation depth of 1163.38 m in the study area. Combined with the fracture structure and magmatic activity characteristics of the southwest Qinghai-Tibet Plateau, the source, storage, cover, and general situation of the area were preliminarily summarised, and the conceptual model of geothermal origin was established. The results can provide a scientific theoretical basis for the mechanism of high-temperature geothermal systems and subsequent drilling and resource development.

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Arc tempos of the Gangdese batholith, southern Tibet

Cited by 17 publications

References 160 publications

Spatiotemporally heterogeneous deformation, indirect tectonomagmatic links, and lithospheric evolution during orogenic activity coeval with an arc flare-up

Spatiotemporally heterogeneous deformation, indirect tectonomagmatic links, and lithospheric evolution during orogenic activity coeval with an arc flare-up

Petrogenesis of the Quxu intrusive complex: Implications for Eocene magmatism in the southern Lhasa Terrane, Tibet

Hydrogeochemical Characteristics and Genesis of the Chazi Geothermal Field Area in Tibet

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