Stratigraphy and Age of the Permian-Triassic Boundary Siliceous Rocks of the Mino Terrane in the Mt. Funabuseyama Area, Central Japan

Sano, Hidehiko; Kuwahara, Kiyoko; Yao, Akira; Agematsu, Sachiko

doi:10.2517/1342-8144-16.2.124

Cited by 19 publications

(26 citation statements)

References 38 publications

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“…The average sedimentation rate for Changhsingian bedded chert of the Hashikadani Formation was estimated for a PTB section at Iwaidani (NF195 section; Sano et al 2012b), cropping out~3 km from the Waidani section (Additional file 2: Figure S2). Lithologically, the NF195 section is very similar to the Waidani section (Sano et al 2010(Sano et al , 2012b, comprising a lower unit (~6.2 m thick) of gray bedded chert, a middle unit (~0.7 m thick) of black bedded chert including pyrite nodules near the top, and an upper unit (~0.9 m thick) characterized by black claystone with thin black chert beds. Biostratigraphic analysis of radiolarians reveals that the section contains the Wuchiapingian-Changhsingian boundary in the basal~0.3 m of the lower unit and an MEE horizon at the top of the middle unit.…”

Section: Estimation Of Sedimentation Rate For Changhsingian Bedded Chertmentioning

confidence: 94%

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

Onoue

Takahata

Miura

et al. 2019

Prog Earth Planet Sci

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The ca 252 Ma Permian-Triassic boundary (PTB) represents the most severe mass extinction event of the Phanerozoic, with the disappearance of~80% of marine invertebrate species. Large-scale eruption of the Siberian Traps is the commonly favored cause, although the link between volcanism and extinction remains debated. Here, we report evidence for an extraterrestrial 3 He influx in the PTB section of deep-sea bedded cherts from Japan. This unusual signal indicates a significant increase in the influx of interplanetary dust particles, likely related to an asteroid shower in the inner solar system. High-resolution stratigraphy indicates that the peak flux of dust particles occurred during the final 500 kyr of the Permian, concurrent with a pre-extinction decline in radiolarian diversity.

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Section: Estimation Of Sedimentation Rate For Changhsingian Bedded Chertmentioning

confidence: 94%

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

Onoue

Takahata

Miura

et al. 2019

Prog Earth Planet Sci

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“…The PTB sections of the Mino Belt, central Japan ( Figure 1) preserve high-resolution biostratigraphic records of the EPME in a mid-oceanic realm of the Panthalassa Ocean (Kuwahara et al, 1998;Yao et al, 2001;Sano et al, 2010;Nishikane et al, 2011;Sano et al, 2012a;Sano et al, 2012b;Nishikane et al, 2014;Kuwahara and Sano, 2017). The intensification of oxygendepleted conditions during the latest Lopingian has been reported from several PTB sections in the Mino Belt (Wignall et al, 2010;Algeo et al, 2011b;Sano et al, 2012b;Onoue et al, 2019).…”

Section: Introductionmentioning

confidence: 63%

“…The rocks examined in the present study correspond to the Permian-Lower Triassic Hashikadani Formation, and crop out along a roadcut near Iwaidani in the Mt. Funabuseyama area (Sano et al, 2012a). In previous studies, the section was referred to as NF195 (Sano et al, 2012a;Kuwahara and Sano, 2017); in this study, we call it the Iwaidani section.…”

Section: Introductionmentioning

confidence: 92%

“…Funabuseyama area (Sano et al, 2012a). In previous studies, the section was referred to as NF195 (Sano et al, 2012a;Kuwahara and Sano, 2017); in this study, we call it the Iwaidani section. This section comprises six subsections (NF195A-NF195F; Sano et al, 2012a;Kuwahara and Sano, 2017) along a 30 m-long roadcut outcrop.…”

Section: Introductionmentioning

confidence: 97%

“…To better understand the redox history of the deep-sea Panthalassa Ocean during the Guadalupian and Lopingian, this paper describes variations in the contents of redoxsensitive elements (e.g., Mn, V, Mo, U) in a Capitanian (upper Guadalupian) to Induan (Lower Triassic) bedded chert succession from the Iwaidani section, Japan (Sano et al, 2012a;Kuwahara and Sano, 2017). We also applied principal component analysis (PCA) to major element contents to investigate the environmental conditions that triggered the changes in oceanic redox conditions.…”

Section: Introductionmentioning

confidence: 99%

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Development of Deep-Sea Anoxia in Panthalassa During the Lopingian (Late Permian): Insights From Redox-Sensitive Elements and Multivariate Analysis

Onoue¹,

Soda

Isozaki

2021

Front. Earth Sci.

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The end-Permian mass extinction (EPME) was the most severe mass extinction event of the Phanerozoic, and was associated with the development of global oceanic anoxia. The intensification of ocean anoxia preceded the EPME, but the degree of intensity and timing of oceanic redox changes in the mid-Panthalassa Ocean remain debated. Here we present the results of geochemical and multivariate statistical analyses of a late Guadalupian to Lopingian (middle–late Permian) bedded chert succession from the Iwaidani section, Japan, which preserves pelagic deep-sea facies from the ocean floor to the lower flank of a mid-Panthalassan seamount. The entire section yields a low manganese-enrichment factor (MnEF <1), suggesting that suboxic conditions has appeared in the depositional environment already in the late Guadalupian. Enrichment factors of other redox-sensitive trace-elements (e.g., vanadium and uranium) and principle component analysis (PCA) of major element data show the development of suboxic to weakly anoxic conditions across the Guadalupian/Lopingian boundary. Subsequently, anoxic conditions, as inferred from enrichments in U, Mo, Ni, Cu, Zn, and Tl, were developed during the middle Lopingian. Extremely high concentrations of U and Mo (enrichment factors of ∼6 and ∼5,500, respectively) indicate that H2S-rich euxinic conditions developed during the latest Lopingian and around the time of the EPME. The cause of the shift toward more reducing conditions in the early–middle Lopingian is unknown, but PCA results suggest that the euxinic conditions occurred in association with intensified continental weathering in response to a temperature rise during the ca. 200 kyr before the EPME.

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Preservation of Permian–Triassic boundary section in the Jurassic accretionary complex of the Lake Hamana, Central Japan

2020

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We examined the lithostratigraphy and deformation structures of the accreted pelagic rocks in Lake Hamana area, Central Japan, based on a detailed field mapping and the radiolarian ages. The constructed lithostratigraphy is composed of Lopingian (Upper Permian) grey chert, black chert, black claystone with a high carbon content of 4.85-6.78 wt%, siliceous claystone, black chert, and Anisian (Middle Triassic) grey chert, in the ascending order. The symmetry in the lithostratigraphy and the change in the radiolarian ages with respect to black carbonaceous claystone are presumed to represent a deep-sea anoxic event that occurred across the Permian-Triassic (P-Tr) boundary. The P-Tr boundary black carbonaceous claystone suffered from an intense shear, resulting in blocks of siliceous claystone in the scaly black claystone matrix. In places, the sheared terrigenous rocks composed of sandstone blocks in the mudstone matrix are intercalated into the pelagic rocks, possibly representing complex mélange forming processes during the development of the Jurassic accretionary complex.

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Stratigraphy and Age of the Permian-Triassic Boundary Siliceous Rocks of the Mino Terrane in the Mt. Funabuseyama Area, Central Japan

Cited by 19 publications

References 38 publications

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

Enhanced flux of extraterrestrial 3He across the Permian–Triassic boundary

Development of Deep-Sea Anoxia in Panthalassa During the Lopingian (Late Permian): Insights From Redox-Sensitive Elements and Multivariate Analysis

Preservation of Permian–Triassic boundary section in the Jurassic accretionary complex of the Lake Hamana, Central Japan

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