High sediment input and possible oceanic anoxia in the pelagic Panthalassa during the latest Olenekian and early Anisian: Insights from a new deep-sea section in Ogama, Tochigi, Japan

Muto, Shun; Takahashi, Satoshi; Yamakita, Satoshi; Suzuki, Noritoshi; Suzuki, Nozomi; Aita, Yoshiaki

doi:10.1016/j.palaeo.2017.11.060

Cited by 30 publications

(34 citation statements)

References 58 publications

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“…The latter is far from well documented (Goudemand et al 2012; Chen et al 2020). Coinciding with a global regression, carbon isotope excursion, and possible oceanic anoxia (Payne et al 2004; Monnet et al 2013; Muto et al 2018), the ammonoid family Acrochordiceratidae displayed a sudden and drastic morphological change (“evolutionary jump”) (Monnet et al 2013). Afterward, the ammonoid BC exhibits a continuous decline, and the DIN becomes simpler, coupled with the emergence of marked latitudinal diversity gradients (Brayard et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Toward an understanding of cosmopolitanism in deep time: a case study of ammonoids from the middle Permian to the Middle Triassic

Dai

Song

2020

Paleobiology

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Cosmopolitanism occurred recurrently during the geologic past, especially after mass extinctions, but the underlying mechanisms remain poorly known. Three theoretical models, not mutually exclusive, can lead to cosmopolitanism: (1) selective extinction in endemic taxa, (2) endemic taxa becoming cosmopolitan after the extinction and (3) an increase in the number of newly originated cosmopolitan taxa after extinction. We analyzed an updated occurrence dataset including 831 middle Permian to Middle Triassic ammonoid genera and used two network methods to distinguish major episodes of ammonoid cosmopolitanism during this time interval. Then, we tested the three proposed models in these case studies. Our results confirm that at least two remarkable cosmopolitanism events occurred after the Permian–Triassic and late Smithian (Early Triassic) extinctions, respectively. Partitioned analyses of survivors and newcomers revealed that the immediate cosmopolitanism event (Griesbachian) after the Permian–Triassic event can be attributed to endemic genera becoming cosmopolitan (model 2) and an increase in the number of newly originated cosmopolitan genera after the extinction (model 3). Late Smithian cosmopolitanism is caused by selective extinction in endemic taxa (model 1) and an increase in the number of newly originated cosmopolitan genera (model 3). We found that the survivors of the Permian–Triassic mass extinction did not show a wider geographic range, suggesting that this mass extinction is nonselective among the biogeographic ranges, while late Smithian survivors exhibit a wide geographic range, indicating selective survivorship among cosmopolitan genera. These successive cosmopolitanism events during severe extinctions are associated with marked environmental upheavals such as rapid climate changes and oceanic anoxic events, suggesting that environmental fluctuations play a significant role in cosmopolitanism.

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Section: Discussionmentioning

confidence: 99%

Toward an understanding of cosmopolitanism in deep time: a case study of ammonoids from the middle Permian to the Middle Triassic

Dai

Song

2020

Paleobiology

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“…Previous reports of Anisian conodonts from bedded chert have been sporadic (Ando et al, 2001;Matsuda and Isozaki, 1982;Mizutani and Koike, 1982;Sugiyama, 1997;Tanaka, 1980). The conodont Chiosella timorensis, which has been proposed as a marker for the base of the Anisian (Ogg, 2012;Orchard, 2010) has been found from pelagic deep-sea sediments including bedded chert in the Kuzuu area in east Japan (Muto et al, 2018), the Nichihara area in southwest Japan (Tanaka, 1980) and the Kamiaso area in central Japan (Matsuda and Isozaki, 1982). In particular, Muto et al (2018) indicated that the radiolarian based Olenekian-Anisian boundary, which is placed at the base of the TR 2A Zone of Sugiyama (1997) is within the middle Anisian.…”

Section: Introductionmentioning

confidence: 98%

“…The conodont Chiosella timorensis, which has been proposed as a marker for the base of the Anisian (Ogg, 2012;Orchard, 2010) has been found from pelagic deep-sea sediments including bedded chert in the Kuzuu area in east Japan (Muto et al, 2018), the Nichihara area in southwest Japan (Tanaka, 1980) and the Kamiaso area in central Japan (Matsuda and Isozaki, 1982). In particular, Muto et al (2018) indicated that the radiolarian based Olenekian-Anisian boundary, which is placed at the base of the TR 2A Zone of Sugiyama (1997) is within the middle Anisian. Therefore, the age of the "lower Anisian" radiolarian biozones of Sugiyama (1997) needs to be reinvestigated.…”

Section: Introductionmentioning

confidence: 99%

Conodont-based age calibration of the Middle Triassic Anisian radiolarian biozones in pelagic deep-sea bedded chert

Muto

Takahashi

Yamakita

et al. 2019

Bull. Geol. Surv. Japan

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The age of pelagic Panthalassic deep-sea bedded chert has been assigned based on radiolarian biostratigraphy. However, Triassic radiolarian biostratigraphy is in many cases not precisely correlated to the conodont zones and the standard geological timescale. In this study, we investigated the conodont biostratigraphy of two radiolarian-controlled bedded chert sections of Anisian age: the Ajiro Island section in Oita Prefecture and the Kurusu section in Aichi Prefecture. We recognised six conodont biozones in the studied sections: the upper Olenekian Novispathodus brevissimus-Icriospathodus collinsoni and Triassospathodus homeri Zones, the lower Anisian Chiosella timorensis Zone, the middle Anisian Paragondolella bulgarica Zone, the upper Anisian Paragondolella excelsa Zone and the uppermost Anisian to lowermost Ladinian Paragondolella trammeri Zone. These conodont zones were successfully correlated to the standard Triassic radiolarian zonation proposed by Sugiyama (1997, Bull. Mizunami

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“…In contrast to the numerous studies on the uppermost Permian-lowermost Triassic siliceous claystone (e.g. Algeo et al, 2009Algeo et al, , 2010Ishiga, 1992;Ishiga, Ishida, Dozen, & Musashino, 1996;Isozaki, 1997b;Kuwahara, Nakae, & Yao, 1991;Muto et al, 2018;Sugiyama, 1992;Takahashi, Oba, Kaiho, Yamakita, & Sakata, 2009;Takahashi, Yamakita, Suzuki, Kaiho, & Ehiro, 2009;Yamakita, 1987Yamakita, , 1999Yao & Kuwahara, 1997), few studies have discussed décollement zones in the Permian sequences. Niwa (2006aNiwa ( , 2006b indicated the possibility that mafic volcanic rock in addition to the siliceous claystone constitutes a major or part of a décollement zone based on geological mapping of the Tamba-Mino-Ashio terrane.…”

Section: Introductionmentioning

confidence: 99%

Lithology and radiolarian age of the Ryokami‐yama Chert Formation in eastern Mt. Ryokami: Possible décollement zone in Permian pelagic sequence in mid‐Mesozoic accretionary complexes of Southwest Japan

Ito

Matsuoka

2018

Island Arc

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Uppermost Permian–lowermost Triassic siliceous claystone is well‐known as being a possible décollement zone in accretionary processes of mid‐Mesozoic accretionary complexes in Southwest Japan; meanwhile, fewer studies have focused on other décollement zones in Permian pelagic sequences. The Ryokami‐yama Thrust in the Southern Chichibu terrane, eastern Mt. Ryokami, Kanto Mountains, has been considered an out‐of‐sequence thrust and might show a former décollement zone in the formation's Permian pelagic sequences. This study shows the Permian pelagic sequences (lithology and radiolarian age) of the Ryokami‐yama Chert Formation on the Ryokami‐yama Thrust. The basal part of the Ryokami‐yama Chert Formation consists of pale‐green basaltic tuff breccia and overlying red‐ocher thick‐bedded chert intercalating dolomites. The red‐ocher thick‐bedded chert yielded radiolarians of the Pseudoalbaillella lomentaria Range‐Zone of the Sakmarian (Cisuralian: lower Permian). Compilation of the Permian pelagic sequences of the mid‐Mesozoic accretionary complexes in previous studies indicates that the bases of the Permian chert of many geologic units are concentrated in the Pseudoalbaillella lomentaria Range‐Zone. The following hypothesis is suggested here: the basaltic rock underlying the Sakmarian chert acted as a décollement zone in the Permian pelagic sequences of some geologic units of the mid‐Mesozoic accretionary complexes.

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High sediment input and possible oceanic anoxia in the pelagic Panthalassa during the latest Olenekian and early Anisian: Insights from a new deep-sea section in Ogama, Tochigi, Japan

Cited by 30 publications

References 58 publications

Toward an understanding of cosmopolitanism in deep time: a case study of ammonoids from the middle Permian to the Middle Triassic

Toward an understanding of cosmopolitanism in deep time: a case study of ammonoids from the middle Permian to the Middle Triassic

Conodont-based age calibration of the Middle Triassic Anisian radiolarian biozones in pelagic deep-sea bedded chert

Lithology and radiolarian age of the Ryokami‐yama Chert Formation in eastern Mt. Ryokami: Possible décollement zone in Permian pelagic sequence in mid‐Mesozoic accretionary complexes of Southwest Japan

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