Plate convergence in the Indo-Pacific region

Sun, Weidong; Zhang, Lipeng; Liao, Ruiquan; Sun, Shengsi; Li, Congying; Li, He

doi:10.1007/s00343-020-0146-y

Cited by 22 publications

(7 citation statements)

References 83 publications

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“…Our study suggested that the species distribution and speciation of Pseudoplagiostomataceae had a particular biogeographical pattern, and these species appeared to originate in Asia, particularly in Southeast Asia. Previous studies suggested that the Indian continent collided with the Eurasian continent at ~60 Mya, which was consistent with some speciation of the Pseudoplagiostomataceae , and formed the Hengduan–Himalayan area which was a global biodiversity hotspot [ 52 , 53 , 54 , 55 , 56 , 57 ]. Based on the discovered specimens and biogeographical information, this study is more inclined to explain that Pseudoplagiostomataceae species originated in Asia and spread to Hawaii and South America through Malaysia, Australia, New Zealand, and more than 20,000 independent islands in the South Pacific, and frequent hurricanes and circulating ocean currents in the South Pacific are the best spore carriers.…”

Section: Discussionmentioning

confidence: 62%

Taxonomy, Phylogeny, Divergence Time Estimation, and Biogeography of the Family Pseudoplagiostomataceae (Ascomycota, Diaporthales)

Zhang

Liu

Tao

et al. 2023

JoF

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Species of Pseudoplagiostomataceae were mainly introduced as endophytes, plant pathogens, or saprobes from various hosts. Based on multi-locus phylogenies from the internal transcribed spacers (ITS), the large subunit of nuclear ribosomal RNA gene (LSU), partial DNA-directed RNA polymerase II subunit two gene (rpb2), the partial translation elongation factor 1-alpha gene (tef1α), and the partial beta-tubulin gene (tub2), in conjunction with morphological characteristics, we describe three new species, viz. Pseudoplagiostoma alsophilae sp. nov., P. bambusae sp. nov., and P. machili sp. nov. Molecular clock analyses on the divergence times of Pseudoplagiostomataceae indicated that the conjoint ancestor of Pseudoplagiostomataceae and Apoharknessiaceae occurred in the Cretaceous period. and had a mean stem age of 104.1 Mya (95% HPD of 86.0–129.0 Mya, 1.0 PP), and most species emerged in the Paleogene and Neogene period. Historical biogeography was reconstructed for Pseudoplagiostomataceae by the RASP software with a S–DEC model, and suggested that Asia, specifically Southeast Asia, was probably the ancestral area.

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Section: Discussionmentioning

confidence: 62%

Taxonomy, Phylogeny, Divergence Time Estimation, and Biogeography of the Family Pseudoplagiostomataceae (Ascomycota, Diaporthales)

Zhang

Liu

Tao

et al. 2023

JoF

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“…However, we only tested the effects of subduction duration and oceanic age. Other factors, such as surface process (e.g., Andres‐Martinez et al, 2019; Erdős et al, 2014; Olive et al, 2014), rheological heterogeneities (e.g., Vogt et al, 2017), plate motion direction (Duclaux et al, 2019; Sun et al, 2020), and fluids (Gerya & Meilick, 2011), might have also facilitated this breakup process, but investigating all their contributions are beyond the scope of this study. In the future, the effects of these factors on the evolution of the SCS should be investigated and evaluated.…”

Section: Discussionmentioning

confidence: 99%

Continental Interior and Edge Breakup at Convergent Margins Induced by Subduction Direction Reversal: A Numerical Modeling Study Applied to the South China Sea Margin

Sun

Yang

et al. 2020

Tectonics

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The dynamics of continental breakup at convergent margins has been described as the results of backarc opening caused by slab rollback or drag force induced by subduction direction reversal. Although the rollback hypothesis has been intensively studied, our understanding of the consequence of subduction direction reversal remains limited. Using thermo-mechanical modeling based on constraints from the South China Sea (SCS) region, we investigate how subduction direction reversal controls the breakup of convergent margins. The numerical results show that two distinct breakup modes, namely, continental interior and edge breakup ("edge" refers to continent above the plate boundary interface), may develop depending on the "maturity" of the convergent margin and the age of the oceanic lithosphere. For a slab age of~15 to~45 Ma, increasing the duration of subduction promotes the continental interior breakup mode, where a large block of the continental material is separated from the overriding plate. In contrast, the continental edge breakup mode develops when the subduction is a short-duration event, and in this mode, a wide zone of less continuous continental fragments and tearing of the subducted slab occur. These two modes are consistent with the interior (relic late Mesozoic arc) and edge (relic forearc) rifting characteristics in the western and eastern SCS margin, suggesting that variation in the northwest-directed subduction duration of the Proto-SCS might be a reason for the differential breakup locus along the strike of the SCS margin. Besides, a two-segment trench associated with the northwest-directed subduction is implied in the present-day SCS region.

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“…The current big mantle wedge in East Asia observed by seismic tomography is the product of the Cenozoic North-West subduction of the Pacific plate (Li and Yuen, 2014;Schmid et al, 2002;Sun et al, 2020aSun et al, , 2020bWang et al, 2020). Whether there was a big mantle wedge in East Asia during the Late Mesozoic and its formation age is a major topic of controversy among geologists in China.…”

Section: Big Mantle Wedgementioning

confidence: 99%

“…suture in the Paleozoic (Dong et al, 2011;Meng and Zhang, 1999;Sun et al, 2002b;Zhang et al, 1995); the subduction and collision along the Qinling-Dabie-Sulu orogenic belt in the Early Mesozoic (Li et al, 1993(Li et al, , 1994Sun et al, 2002aSun et al, , 2002cZheng et al, 2013); the subduction and collision along the Central Asian orogenic belt in the Paleozoic (Jahn et al, 2000;Ling et al, 2013;Wu et al, 2007;Xiao et al, 2003) and (paleo)-Pacific plate subduction since the Jurassic (Niu, 2005;Zhang et al, 2020b;Zhu and Xu, 2019). Plate subduction and collision are very significant for the enrichment of ore-forming materials (Chen and Wu, 2020;Li et al, 2020;Liu et al, 2020a;Sun et al, 2020b;Wang and Xiao, 2018;Zheng et al, 2019). All of these subductions may have contributed to the formation of water-and gold-rich weak layers in the lithospheric mantle of the North China Craton, among which the subducted plate below the big mantle wedge contributed the most.…”

Section: Genesis Of the Decratonic Gold Deposit 41 The Source Of Gold Metallogenic Fluidmentioning

confidence: 99%

The big mantle wedge and decratonic gold deposits

Zhu

Sun

2021

Sci. China Earth Sci.

Self Cite

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The Circum-Pacific subduction zone is a famous gold metallogenic domain in the world, with two important gold metallogenic provinces, the North China Craton and Nevada, which are related to the destruction of the North China Craton and the Wyoming Craton, respectively. Their ore-forming fluids were possibly derived from the stagnant slab in the mantle transition zone. The oceanic lithospheric mantle usually contains serpentine layers up to thousands of meters thick. During plate subduction, serpentine is dehydrated at depths of <200 km and transformed into high-pressure hydrous minerals, known as Phases A to E, which carries water to the depth of >300 km. The overlying big mantle wedge is hydrated during the breakdown of these hydrous facies in the mantle transition zone. The dehydration of the subducted slab in the big mantle wedge releases sulfur-rich fluid, which extracts gold and other chalcophile elements in the surrounding rocks, forming gold-rich fluid. Because the cratonic geotherm is lower than the water-saturated solidus line of lherzolite, the fluid cannot trigger partial melting. Instead, it induces metasomatism and forms pargasite and other water-bearing minerals when it migrates upward to depths of less than 100 km in the cratonic lithospheric mantle, resulting in a water-and gold-rich weak layer. During the destruction of craton, the weak layer is destabilized, releasing gold-bearing fluids that accelerate the destruction. The ore-forming fluids migrate along the shallow weak zone and are accumulated at shallow depths, and subsequently escape along deep faults during major tectonic events, leading to explosive gold mineralization. The ore-forming fluids are rich in ferrous iron, which releases hydrogen at low pressure through iron hydrolysis. Therefore, decratonic gold deposits are often reduced deposits.

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Plate convergence in the Indo-Pacific region

Cited by 22 publications

References 83 publications

Taxonomy, Phylogeny, Divergence Time Estimation, and Biogeography of the Family Pseudoplagiostomataceae (Ascomycota, Diaporthales)

Taxonomy, Phylogeny, Divergence Time Estimation, and Biogeography of the Family Pseudoplagiostomataceae (Ascomycota, Diaporthales)

Continental Interior and Edge Breakup at Convergent Margins Induced by Subduction Direction Reversal: A Numerical Modeling Study Applied to the South China Sea Margin

The big mantle wedge and decratonic gold deposits

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