Fingerprinting subducted oceanic crust and Hainan Plume in the melt sources of Cenozoic Basalts from the South China Sea Region

Tian, Ziwei; Yan, Yi; Huang, Chi‐Yue; Dilek, Yıldırım; Yu, Mengming; Liu, Haiquan; Zhang, Xingchang; Zhang, Yong

doi:10.1111/ter.12486

Cited by 9 publications

(8 citation statements)

References 44 publications

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“…Li et al, 2008X. Li et al, , 2017Mi et al, 2021;Tian et al, 2021;Xia et al, 2016;X. Yang et al, 2021).…”

Section: Comparison With Previous Resultsunclassified

“…Many researchers have investigated the crustal and upper mantle Vp and anisotropy structures in the Hainan and surrounding areas, and displayed distinct low‐V anomalies in the crustal and upper mantle under the Leiqiong areas (e.g., H. Chen et al., 2021; J. Huang, 2014; Z. Huang & Xu, 2011; Lei, Zhao, Steinberger, et al., 2009; X. Li et al., 2008, 2017; Mi et al., 2021; Tian et al., 2021; F. Wei et al., 2020; Xia et al., 2016; Y. Xu et al., 2007; X. Yang et al., 2021). However, the low‐V anomaly in the models of Xia et al.…”

Section: Discussionmentioning

confidence: 99%

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Pn Anisotropic Tomography of Hainan Island and Surrounding Areas: New Insights Into the Hainan Mantle Plume

Lu¹,

Lei²,

Zhao

et al. 2022

JGR Solid Earth

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The Hainan and surrounding areas in the Eurasian plate are one of the most active and complex regions in the western Pacific subduction system, surrounded by the Indo-Australian plate, the Philippine Sea plate and the Pacific plate (Figure 1). The Pacific and Philippine Sea plates are subducting westward, the Indian plate is subducting eastward, whereas the Indo-Australian plate is subducting northward (Bird, 2003). The interactions between these plates may have significantly influenced mantle convection under this region, which leads to intensive seismicity and intraplate volcanism (Figure 1). The Indo-Eurasian collision resulted in a sinistral strike-slip Red River fault zone (e.g., Bird, 2003;Tapponnier et al., 1982;Xia et al., 2015;Yin, 2010) (Figure 1). Since the Oligocene, the opening of the South China Sea (SCS) has activated the faults in the Leiqiong area, and changed the tectonic stress field from compressive to extensional. As a result, the volcanic activity in this area had continued until the Holocene (e.g., Z.

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“…Li et al, 2008X. Li et al, , 2017Mi et al, 2021;Tian et al, 2021;Xia et al, 2016;X. Yang et al, 2021).…”

Section: Comparison With Previous Resultsunclassified

Section: Discussionmentioning

confidence: 99%

Pn Anisotropic Tomography of Hainan Island and Surrounding Areas: New Insights Into the Hainan Mantle Plume

Lu¹,

Lei²,

Zhao

et al. 2022

JGR Solid Earth

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“…The basement rocks on Hainan are covered peripherally by Quaternary alluvium, and by Quaternary intra-plate basaltic lava flows in the northern part of the island ( Fig. 4; Tian et al 2020). Similar lava fields continue to the north on the Leizhou (Liuchow) Peninsula in mainland China, making up the Leiqiong volcanic field.…”

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confidence: 95%

Magmatic record of the Mesozoic geology of Hainan Island and its implications for the Mesozoic tectonomagmatic evolution of SE China: effects of slab geometry and dynamics in continental tectonics

Dilek

Tang

2020

Geol. Mag.

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Our field-based geochemical studies of the Triassic, Jurassic and Cretaceous granitoids on Hainan Island indicate that their magmas had different geochemical affinities, changing from alkaline in the Triassic through ocean island basalt (OIB) in the Jurassic, to calc-alkaline in the Cretaceous. We show that these changes in the geochemical affinities of the Mesozoic granitoids on Hainan and in SE China reflect different melt sources and melt evolution patterns through time. Our new geodynamic model suggests that: (1) Triassic geology was controlled by flat-slab subduction of the palaeo-Pacific plate beneath SE China. This slab dynamics resulted in strong coupling between the lower and upper plates, causing push-over tectonics and contractional deformation in SE China. Flat subduction-induced edge flow and aesthenospheric uprising led to the production of high-K granites, syenites and mafic rocks. (2) Slab foundering, accelerated subduction rates and subduction hinge retreat in the Early Jurassic caused rapid rollback of the downgoing slab. Strong decoupling of the upper and lower plates resulted in pull-away tectonics, producing extensional deformation in SE China. Decompression melting of the upwelling aesthenosphere produced OIB-type melts, which interacted with the subcontinental lithospheric mantle (SCLM) to form A- and I-type granitoids. (3) Segmentation of the palaeo-Pacific plate in the Early Cretaceous resulted in steeply dipping slabs and their faster rollback, facilitating lithospheric-scale extension and oceanward migration of calc-alkaline magmatism. This extensional deformation played a significant role in the formation of metamorphic core complexes, widespread crustal melting and development of a Basin and Range-type tectonics and landscape evolution in SE China.

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“…Thermal springs in south Hunan reach 91.5°C and are mainly controlled by NEoriented faults (Long et al, 2021). The early Paleozoic belt with Triassic overprint region is characterized by Cenozoic large-scale basaltic magmatic activity developed in the Leizhou Peninsula (LP) and northern Hainan (Tian et al, 2020;Hu et al, 2022). The basaltic rocks are of mantle origin, with a much lower radiogenic heat production than granite and having better conditions for volcanic hot dry rock (Shi et al, 2014).…”

Section: Geological Settingmentioning

confidence: 99%

Hydrothermal Systems Characterized by Crustal Thermally‐dominated Structures of Southeastern China

Wang

Gan

Lin

et al. 2023

Acta Geologica Sinica (Eng)

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Southeastern China (SE China) is located in the Pacific tectonic domain and has experienced a series of tectono–magmatic activities induced by the subduction of the Paleo–Pacific Plate since the late Mesozoic. The subduction formed a series of NE‐NNE oriented faults under the NW‐SE regional stress field, along which a number of thermal springs occur. Previous studies have focused on the genesis mechanism of specific geothermal field in SE China, but the generality characteristic of hydrothermal systems in SE China remains unclear. In this paper, we investigate the correlation between geothermal activity, hydrochemical type, and regional faults by studying the distribution of hydrothermal activity and geochemical properties of typical hydrothermal systems in SE China. The hydrothermal systems in SE China have the crustal thermal–dominated structures genesis unique to the specific geological and tectonic conditions of the Eurasian Plate margin. The upwelling of the asthenosphere and the widespread granitoids with high radiogenic heat production in SE China provide major heat sources for the regional geothermal anomalies. The NE–oriented crustal thermal–dominant faults are critical for the formation of geothermal anomalies. and NW–oriented extensional faults have created favorable conditions for meteoric water infiltration, transport and form thermal springs.

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Fingerprinting subducted oceanic crust and Hainan Plume in the melt sources of Cenozoic Basalts from the South China Sea Region

Cited by 9 publications

References 44 publications

Pn Anisotropic Tomography of Hainan Island and Surrounding Areas: New Insights Into the Hainan Mantle Plume

Pn Anisotropic Tomography of Hainan Island and Surrounding Areas: New Insights Into the Hainan Mantle Plume

Magmatic record of the Mesozoic geology of Hainan Island and its implications for the Mesozoic tectonomagmatic evolution of SE China: effects of slab geometry and dynamics in continental tectonics

Hydrothermal Systems Characterized by Crustal Thermally‐dominated Structures of Southeastern China

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