TY - JOUR
T1 - The Kellwasser events in the Upper Devonian Frasnian to Famennian transition in the Toc Tat Formation, northern Vietnam
AU - Komatsu, Toshifumi
AU - Urakawa, Ryota
AU - Inada, Toshitaka
AU - Yamauchi, Kazuki
AU - Maekawa, Takumi
AU - Takashima, Reishi
AU - Williams, Mark
AU - Nguyen, Phong D.
AU - Doan, Hung D.
AU - Nguyen, Minh T.
AU - Niko, Shuji
AU - Tanaka, Gengo
AU - Yamaguchi, Tatsuhiko
N1 - Funding Information:
information Grant-in-Aids for Scientific Research (KAKENHI) from the Japan Society for the Promotion of Science (JSPS), Grant/Award Number: Grant number: 16K05593; Leverhulme Research Fellowship, Grant/Award Number: Grant number: RF-2018-275\4; Research grant of the Building National Specimens Collection on Vietnam Nature, Grant/Award Number: Project number: BSTMV.28/15-18; Research grant of the Ministry of Natural Resources and Environment (MONRE), Grant/Award Number: Project number: TNMT.2018.03.05; The research grant of Tokyo Geographical Society; Leverhulme Trust; Building National Specimens Collection on Vietnam Nature; Tokyo Geographical Society; Japan Society for the Promotion of Science, Grant/Award Number: 16K05593We thank Dinh C. Tien, Nguyen V. Hien, Dang T. Huyen (Vietnam Institute of Geosciences and Mineral Resources), and Nguyen H. Hung (Vietnam National Museum of Nature) for their help in fieldwork. Special thanks to Akihiro Kano and Satoshi Takahashi (The University of Tokyo) for their reviews of the manuscript. This study was financially supported by Grant-in-Aids for Scientific Research (KAKENHI) from the Japan Society for the Promotion of Science (16K05593 to TK), the research grant of Tokyo Geographical Society (to TK) and Building National Specimens Collection on Vietnam Nature (Project for Collecting Paleontological Specimens in Vietnam, BSTMV.28/15-18 to DDH). NDP were supported by the Vietnamese project ‘Stratigraphical research for the Devonian sedimentary rocks in the north-northwest of the Song Hien structure’ (project number TNMT.2018.03.05). MW thanks the Leverhulme Trust for support (Research Fellowship RF-2018-275\4, ‘The early Palaeozoic evolution of NE Vietnam’). This study was performed under the cooperative research program of the Center for Advanced Marine Core Research, Kochi University <15A027, 15B024, 16A024, and 16B022>.
Funding Information:
Grant-in-Aids for Scientific Research (KAKENHI) from the Japan Society for the Promotion of Science (JSPS), Grant/Award Number: Grant number: 16K05593; Leverhulme Research Fellowship, Grant/Award Number: Grant number: RF-2018-275\4; Island Arc. 2019;28:e12281. https://doi.org/10.1111/iar.12281
Funding Information:
Research grant of the Building National Specimens Collection on Vietnam Nature , Grant/Award Number: Project number: BSTMV.28/15-18; Research grant of the Ministry of Natural Resources and Environment (MONRE) , Grant/Award Number: Project number: TNMT.2018.03.05; The research grant of Tokyo Geographical Society; Leverhulme Trust; Building National Specimens Collection on Vietnam Nature; Tokyo Geographical Society; Japan Society for the Promotion of Science, Grant/Award Number: 16K05593
Funding Information:
We thank Dinh C. Tien, Nguyen V. Hien, Dang T. Huyen (Vietnam Institute of Geosciences and Mineral Resources), and Nguyen H. Hung (Vietnam National Museum of Nature) for their help in fieldwork. Special thanks to Akihiro Kano and Satoshi Takahashi (The University of Tokyo) for their reviews of the manuscript. This study was financially supported by Grant-in-Aids for Scientific Research (KAKENHI) from the Japan Society for the Promotion of Science (16K05593 to TK), the research grant of Tokyo Geographical Society (to TK) and Building National Specimens Collection on Vietnam Nature (Project for Collecting Paleontological Specimens in Vietnam, BSTMV.28/15-18 to DDH). NDP were supported by the Vietnamese project ‘Stratigraphical research for the Devonian sedimentary rocks in the north-northwest of the Song Hien structure’ (project number TNMT.2018.03.05). MW thanks the Leverhulme Trust for support (Research Fellowship RF-2018-275\4, ‘The early Palaeozoic evolution of NE Vietnam’). This study was performed under the cooperative research program of the Center for Advanced Marine Core Research, Kochi University <15A027, 15B024, 16A024, and 16B022>.
Publisher Copyright:
© 2018 John Wiley & Sons Australia, Ltd
PY - 2019/1
Y1 - 2019/1
N2 - Upper Devonian carbonates of the Toc Tat Formation in the Si Phai Pass area of Dong Van District, northern Vietnam were deposited in carbonate platform, slope, and basin environments. These carbonates yield abundant conodonts indicative of the Palmatolepis nasuta, Pa. linguiformis and Pa. triangularis zones, the Frasnian–Famennian stage boundary being identified by the first occurrence of Pa. triangularis. Two positive carbon isotope excursions are recognized, the lower excursion peaking in the interval of the lower to middle Pa. nasuta Zone, whilst the upper excursion peaks just above the local Frasnian–Famennian boundary. Based on the biostratigraphy, these excursions equate to the Lower and Upper Kellwasser events. Locally, tentaculitoid taxa (Nowakia, Styliolina, Homoctenus, and Metastyliolina?) are abundant in the interval of the Pa. nasuta Zone, but show a drastic decline in abundance before the Lower Kellwasser Event, and only two taxa survived into the Famennian.
AB - Upper Devonian carbonates of the Toc Tat Formation in the Si Phai Pass area of Dong Van District, northern Vietnam were deposited in carbonate platform, slope, and basin environments. These carbonates yield abundant conodonts indicative of the Palmatolepis nasuta, Pa. linguiformis and Pa. triangularis zones, the Frasnian–Famennian stage boundary being identified by the first occurrence of Pa. triangularis. Two positive carbon isotope excursions are recognized, the lower excursion peaking in the interval of the lower to middle Pa. nasuta Zone, whilst the upper excursion peaks just above the local Frasnian–Famennian boundary. Based on the biostratigraphy, these excursions equate to the Lower and Upper Kellwasser events. Locally, tentaculitoid taxa (Nowakia, Styliolina, Homoctenus, and Metastyliolina?) are abundant in the interval of the Pa. nasuta Zone, but show a drastic decline in abundance before the Lower Kellwasser Event, and only two taxa survived into the Famennian.
KW - Devonian Kellwasser events
KW - Frasnian–Famennian boundary
KW - Vietnam
KW - carbon isotopes
KW - conodonts
KW - depositional environments
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U2 - 10.1111/iar.12281
DO - 10.1111/iar.12281
M3 - Article
AN - SCOPUS:85056100101
VL - 28
JO - Island Arc
JF - Island Arc
SN - 1038-4871
IS - 1
M1 - e12281
ER -