Geochemistry and petrogenesis of Quaternary basalts from Weizhou Island, northwestern South China Sea: Evidence for the Hainan plume

Yu, Kefu; Fan, Tianlai; Yue, Yuanfu; Wang, Rui; Jiang, Wei; Xu, Shendong; Wang, Yinghui

doi:10.1016/j.lithos.2020.105493

Cited by 17 publications

(10 citation statements)

References 62 publications

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“…The Weizhou Island is the youngest and largest Quaternary volcanic rock island in China. Based on dating results from the optically stimulated luminescence and electron spin resonance studies, the last eruption of the Weizhou volcano was from the late Late Pleistocene to the early Holocene, about 13–33 ka ago (e.g., J. Xu et al., 2020; Zhang et al., 2020). Geochemical studies demonstrated that the basalts in the Weizhou Island share a similar source with those in the Leiqiong area (e.g., J. Xu et al., 2020; Zhang et al., 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Geochemical studies demonstrated that the basalts in the Weizhou Island share a similar source with those in the Leiqiong area (e.g., J. Xu et al, 2020;Zhang et al, 2020). C. Li et al (2005) pointed out that the Weizhou sub-plume could be a branch of the Hainan mantle plume, but there has been no seismological evidence for that.…”

Section: Origin Of the Weizhou Island Volcanomentioning

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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Section: Discussionmentioning

confidence: 99%

Section: Origin Of the Weizhou Island Volcanomentioning

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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“…Late Cenozoic OIB‐type intraplate magmatism is also widely distributed in South China‐SCS‐mainland SE Asia (e.g., northern SCS margin, Reed Bank, Scarborough, Indochina), and is often interpreted to be linked to the Hainan plume activity (Hoang et al., 2018; Yan et al., 2018; Zhang et al., 2020, and references therein). Apart from the OIB‐type geochemical signature, many of these OIB‐type magmatic units have also very similar Sr‐Nd‐Pb isotope compositions to the Plio‐Pleistocene basalts in northern Borneo, and formed a trend toward EMII (Figure 10).…”

Section: Tectonomagmatic Evolution Of Sulu Sea Arc‐basin Systemmentioning

confidence: 99%

Cenozoic Evolution of the Sulu Sea Arc‐Basin System: An Overview

et al. 2021

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“…Weizhou island is characterized by elevated terrain in the south and low-lying terrain in the north. Volcanic rocks in Weizhou island are dominated by alkaline basalts, which exhibit the Dupal isotopic anomaly and geochemical characteristics that are consistent with those of ocean island basalts (OIBs) formed by mixing of the DM and EMII mantle components (Fan et al, 2008;Xu et al, 2012;Yang et al, 2020;Zhang et al, 2020). According to previous studies (Li and Liu, 1991;Lu, 1993;Li and Fang, 2004;Fan et al, 2006), the formation of Weizhou island involved multi-stage volcanism, characterized by several eruption styles, which produced several volcanoes.…”

Section: Introductionmentioning

confidence: 93%

Eruption Sequences and Characteristics of Weizhou Island Volcano, Guangxi Province, South of China

Yang

Zhao

et al. 2021

Front. Earth Sci.

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Weizhou island, located in the north margin of the South China Sea (SCS), is characterized by multi-stage volcanism, several eruption styles and eruption craters, and is also the youngest Quaternary volcanic island in China. An eruption on this island may pose high risk to life and property. However, the eruptive history of Weizhou island, the craters number and location, and their eruptive sequence and characteristics are still being debated, which are important for potential volcanic hazard assessment. In the present study, field surveys, 40Ar/39Ar and 14C geochronological studies and whole rock composition analysis of volcanic rock are used to investigate the eruption sequences associated with Weizhou island and the characteristics of each period. Four volcanoes were discovered at Henglushan, Hengling, Nanwan and Daling. The Henglushan and Hengling volcanoes were produced by early weak explosive and late effusive eruptions, and lavas from these volcanoes represent the foundation of island. Conversely, the Nanwan and Daling volcanoes are linked to multiple explosive eruption phases, with hydromagmatic eruptions in the first and last phase and a magmatic explosive eruption in the second phase. The pyroclastic density currents (PDCs) deposits of the Nanwan and Daling volcanoes virtually cover the entire island. Volcanic activity in Weizhou island started in Early Pleistocene and ended in Late Pleistocene. This can be divided into the following distinct periods: 1,420–1,260, 870–740, 600–480, 283–222 ka, and 33.7–13 ka. The first four periods were dominated by effusive eruptions associated with the Henglushan and Hengling volcanoes, which peaked between 870 and 740 ka. After this period, explosive eruptions began at around 33.7 ka because of magma–water interactions. These explosive eruptions then created the Nanwan and Daling volcanoes. Early effusive lava flows in Weizhou island are characterized by basaltic compositions and are linked with a small amount of fractional crystallization. Magmas in later eruptions contained slightly lower SiO2 and involved some basanite. Fractional crystallization was also less pronounced in these lavas because of their rapid ascent.

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Geochemistry and petrogenesis of Quaternary basalts from Weizhou Island, northwestern South China Sea: Evidence for the Hainan plume

Cited by 17 publications

References 62 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

Cenozoic Evolution of the Sulu Sea Arc‐Basin System: An Overview

Eruption Sequences and Characteristics of Weizhou Island Volcano, Guangxi Province, South of China

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