Postdated melting of subcontinental lithospheric mantle by the Emeishan mantle plume: Evidence from the Anyi intrusion, Yunnan, SW China

Yu, Song-Yue; Song, Xie‐Yan; Chen, Lie-Meng; Li, Xiaobiao

doi:10.1016/j.oregeorev.2013.08.006

Cited by 16 publications

(3 citation statements)

References 68 publications

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“…Recently, some studies have proposed that recycled materials in the Emeishan mantle plume played a key role in producing the observed compositional diversity of the Emeishan LIP (Bai et al., 2014; Hou et al., 2013; C. Yang & Liu, 2019; Yu et al., 2014; L. Zhang et al., 2019). C. Yang and Liu (2019) and L. Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine‐Hosted Melt Inclusions of the Lijiang Picrites

et al. 2021

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Large igneous provinces (LIPs) result from intensive large-scale magmatism in which vast volumes (>0.1 × 10 6 km 3 ) of magma were erupted over a short duration (<5 Myr; Bryan & Ernst, 2008). Some LIPs are thought to have been associated with mantle plumes and are therefore of high importance to the study of the Earth's mantle. The Emeishan LIP has received much research attention because it hosts world-class Fe-Ti-V oxide deposits and is considered to have contributed to the end-Guadeloupian mass extinction

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Section: Introductionmentioning

confidence: 99%

Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine‐Hosted Melt Inclusions of the Lijiang Picrites

et al. 2021

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“…As the magmatic events of ELIP caused the uplift and erosion of the southwestern Yangtze before and during the eruption (Yu et al, 2014), the Khamdian Paleoland served as a major source region for the Lower Triassic deposits of the Sichuan Basin. The shrank detritus transportation during the Middle Triassic as the detrital rocks rarely distributed in south-southwest Sichuan Basin adjacent to the Khamdian Paleoland (Zhu et al, 2017;Yan et al, 2018) indicated that it may undergo a gradually thermal subsidence process as a response of the ELIP (Saunders et al, 2005).…”

Section: Tectonic-paleogeographic Evolution From Early To Late Triass...mentioning

confidence: 99%

A Study on the Provenance of Early to Late Triassic Clastic Rocks From the Northwestern Sichuan Basin, Southwestern China: Constraints on the Early Mesozoic Tectonic Evolution of the Western Yangtze Block

et al. 2022

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U–Pb ages of 637 new detrital zircons of Triassic sandstones from the Northwestern Sichuan Basin (NWSB), together with the petrology and paleocurrent data, are used to constrain the sediment provenance and tectonic–paleogeographic evolution of the western Yangtze Block. The U–Pb age data for the Lower Triassic detrital zircons generally show populations at ∼1,850 Ma, 980–705 Ma, 680–510 Ma, and 290–230 Ma with a minor cluster at ∼2.4 Ga. Such age spectrum features together with the eastward to northeastward paleocurrent direction implied that the Northwestern Sichuan Basin was dominantly fed by the uplifted Khamdian Paleoland. The Upper Triassic detrital zircons yield age populations at 855–730 Ma, 455–415 Ma, and 290–215 Ma and a prominent age group of 1.9–1.7 Ga. These age spectrum features together with paleocurrent data showed a provenance change with a major source of the Longmenshan thrust belt and Songpan-Ganzi terrane for the south area of NWSB and the Qinling orogenic belt for the north part of NWSB. Such transition of the provenance probably indicated the subsidence of the Khamdian Paleoland and uplift of the Songpan-Ganzi terrane and Qinling orogenic belt from the Early Triassic to the Late Triassic. This tectonic inversion most likely resulted from the gradually thermal subsidence of the Emeishan large igneous province (ELIP) and the gravitational loading triggered by the eastward shortening of the Songpan-Ganzi terrane as well as the ongoing convergence between Yangtze Block and North China Block.

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“…The association of picrites with LIPs provide one of the important lines of evidence in favour of a relatively high-temperature plume source (He et al 2003;Hanski et al 2004;Ali et al 2005;Campbell, 2005Campbell, , 2007Zhang et al 2006;Shellnutt, 2014;Santosh et al 2018;Condie & Puetz, 2019). However, some recent studies suggested that the source of the Emeishan large igneous province (ELIP) picrites involved variable proportions of pyroxenite or eclogites (Kamenetsky et al 2012;Yu et al 2014Yu et al , 2017Liu et al 2017;Zhu et al 2018). The presence of eclogites or pyroxenite in the mantle source region can lead to overestimates in temperature as the thermometers assume a peridotite-dominated source (e.g.…”

Section: Introductionmentioning

confidence: 99%

Genesis of high-Ni olivine phenocrysts of the Dali picrites in the Central Emeishan large igneous province

et al. 2020

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The Emeishan large igneous province (ELIP) in SW China is considered to be a typical mantle-plume-derived LIP. The picrites formed at relatively high temperatures in the ELIP, providing one of the important lines of argument for the role of mantle plume. Here we report trace-element data on olivine phenocrysts in the Dali picrites from the ELIP. The olivines are Ni-rich, and characterized by high (>1.4) 100×Mn/Fe value and low (<13) 10 000×Zn/Fe value, indicating a peridotite-dominated source. Since the olivine–melt Ni partition coefficient (KDNiol/melt) will decrease at high temperatures and pressures, the picrites derived from peridotite melting at high pressure, and that crystallized olivines at lower pressure, can generate high concentrations of Ni in olivine phenocrysts, excluding the necessity of a metasomatic pyroxenite contribution. Based on the Al-in-olivine thermometer, olivine crystallization temperature and mantle potential temperature (TP) were calculated at c. 1491°C and c. 1559°C, respectively. Our results are c. 200°C higher than that of the normal asthenospheric mantle, and are consistent with the role of a mantle thermal plume for the ELIP.

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Postdated melting of subcontinental lithospheric mantle by the Emeishan mantle plume: Evidence from the Anyi intrusion, Yunnan, SW China

Cited by 16 publications

References 68 publications

Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine‐Hosted Melt Inclusions of the Lijiang Picrites

Nature of the Mantle Plume Under the Emeishan Large Igneous Province: Constraints From Olivine‐Hosted Melt Inclusions of the Lijiang Picrites

A Study on the Provenance of Early to Late Triassic Clastic Rocks From the Northwestern Sichuan Basin, Southwestern China: Constraints on the Early Mesozoic Tectonic Evolution of the Western Yangtze Block

Genesis of high-Ni olivine phenocrysts of the Dali picrites in the Central Emeishan large igneous province

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