Devonian–Carboniferous transition in the Pho Han Formation on Cat Ba Island, northeastern Vietnam

Komatsu, Toshimitsu; Takashima, Reishi; Naruse, Hajime; Phương, Tạ Hòa; Huyen, Dang Tran; Phong, Nguyen Duc; Tien, Dinh Cong; Chung, Ho Tien; Van, Tran Tan; Kato, Satoru; Maekawa, Takumi; Gatovsky, Yu. A.

doi:10.5575/geosoc.118.6.v_vi

Cited by 6 publications

(3 citation statements)

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“…This trend roughly corresponds with the δ 13 C org data in Paschall et al (), except for a more distinct positive peak recognized in the lower part of Interval B and the absence of a smaller peak at Bed 121 (Bed 116). On the other hand, positive peaks of δ 13 C carb in Interval B were reported by Komatsu, Takashima, Ta, et al (), but subsequently, denser data by Paschall et al () show more scattered plots with an unclear peak at Beds 115–117.…”

Section: Discussionmentioning

confidence: 84%

“…The Pho Han Formation is approximately 500 m thick, consisting mainly of carbonate platform limestone, with subordinate amounts of marl, shale, and chert (Doan & Tong‐Dzuy, ; Komatsu et al, ; Komatsu et al, ; Komatsu et al, ). The D–C transition of the Pho Han Formation is well exposed in this section (Figure ), and each bed in the sequence was numbered from 1 to 167 by Ta and Doan ().…”

Section: Geologic Settingmentioning

confidence: 99%

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Variations in trace elements, isotopes, and organic geochemistry during the Hangenberg Crisis, Devonian–Carboniferous transition, northeastern Vietnam

et al. 2020

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The Hangenberg Crisis at the Devonian-Carboniferous boundary is known as a polyphase extinction event that affected more than 45 % of marine and terrestrial genera. As the cause of this event is still debated, analyses were carried out on sedimentary samples from the Devonian-Carboniferous Pho Han Formation in northeastern Vietnam to reconstruct the paleoenvironment around the time of this event using stable carbon isotopes; total sulfur; manganese; vanadium; molybdenum; and sedimentary organic matter, such as dibenzothiophenes, cadalene, and regular steranes. These geochemical signatures provide a high-resolution redox history for this section and show that transgression-driven high primary productivity, possibly enhanced by terrestrial input, caused severe oxygen depletion along the continental margin of the South China block during the Hangenberg Crisis.

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Section: Discussionmentioning

confidence: 84%

Section: Geologic Settingmentioning

confidence: 99%

Variations in trace elements, isotopes, and organic geochemistry during the Hangenberg Crisis, Devonian–Carboniferous transition, northeastern Vietnam

et al. 2020

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“…The Cat Co section, located in the Cat Ba Island (northwestern Vietnam) and exposing rocks of the Pho Han Formation, has been studied in detail in the recent period with multidisciplinary studies including conodont biostratigraphy, facies analysis, trace elements, isotopes and organic geochemistry (Komatsu et al 2012(Komatsu et al , 2014Paschall et al 2019;Shizuya et al 2020). The section (Fig.…”

Section: Vietnammentioning

confidence: 99%

The Devonian-Carboniferous Boundary around the globe: a complement

Aretz

Corradini

Denayer

2021

Palaeobio Palaeoenv

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This article compiles data on the Devonian-Carboniferous Boundary successions from countries and regions, which have not been dealt with separately in this special issue. Data derive from different palaeocontinents on a large palaeoclimatic gradient from the southern high latitudes of western Gondwana through the palaeotropics into the temperate/boreal northern latitudes of Siberia. The quality of the data is variable, but often surprisingly good, although major uncertainties can persist and traditional positions of the boundary do not withhold modern stratigraphic results and concepts. Not all these regions have been on the forefront of the DCB discussions in recent years, but they provide invaluable insights into the regional and global dimensions of uppermost Devonian and lowermost Carboniferous changes in the biosphere and geosphere. Almost globally documented are faunal turnovers and collapse of ecosystems in the Hangenberg extinctions. Those allow the placement of the DCB even if index fossils are absent or scarce. However, it also shows the regional differences, which advocate for a holistic approach to the boundary by ensuring global correlation without relying on the conceptual dominance a single taxon, which might be less powerful outside its usual facies.

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Titanium local coordination environments in Cretaceous–Paleogene and Devonian–Carboniferous boundary sediments as a possible marker for large meteorite impact

Tobase

Yoshiasa²,

Komatsu³

et al. 2019

Phys Chem Minerals

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Devonian–Carboniferous transition in the Pho Han Formation on Cat Ba Island, northeastern Vietnam

Cited by 6 publications

References 1 publication

Variations in trace elements, isotopes, and organic geochemistry during the Hangenberg Crisis, Devonian–Carboniferous transition, northeastern Vietnam

Variations in trace elements, isotopes, and organic geochemistry during the Hangenberg Crisis, Devonian–Carboniferous transition, northeastern Vietnam

The Devonian-Carboniferous Boundary around the globe: a complement

Titanium local coordination environments in Cretaceous–Paleogene and Devonian–Carboniferous boundary sediments as a possible marker for large meteorite impact

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