Tsuji, Takashi et al. (2005): High-resolution chronology of the lower Pleistocene Otadai and Umegase formations of the Kazusa Group, Boso Peninsula, central Japan; chronostratigraphy of the JNOC TR-3 cores based on oxygen isotope, magnetostratigraphy and calcareous nannofossil
Leg/Site/Hole:
Related Expeditions:
ODP 111 ODP 138 DSDP 94 DSDP 94 607 ODP 111 677 ODP 138 849
Identifier:
ID:
2005-055108
Type:
georefid
Creator:
Name:
Tsuji, Takashi
Affiliation:
JAPEX Research Center, Chiba, Japan
Role:
author
Name:
Miyata, Yuichiro
Affiliation:
Yamaguchi University, Japan
Role:
author
Name:
Okada, Makoto
Affiliation:
Ibaraki University, Japan
Role:
author
Name:
Mita, Isao
Affiliation:
Nihon Tennen Gas, Japan
Role:
author
Name:
Nakagawa, Hiroshi
Affiliation:
Geowindow, Japan
Role:
author
Name:
Sato, Yuri
Affiliation:
Japan Overseas Cooperation Volunteers, Tanzania
Role:
author
Name:
Nakamizu, Masaru
Affiliation:
Japan Oil, Gas and Metal National Corporation, Japan
Role:
author
Identification:
Title:
High-resolution chronology of the lower Pleistocene Otadai and Umegase formations of the Kazusa Group, Boso Peninsula, central Japan; chronostratigraphy of the JNOC TR-3 cores based on oxygen isotope, magnetostratigraphy and calcareous nannofossil
Year:
2005
Source:
Chishitsugaku Zasshi = Journal of the Geological Society of Japan
Publisher:
Nippon Chishitsugaku Gakkai, Tokyo, Japan
Volume:
111
Issue:
1
Pages:
1-20
Abstract:
Detailed oxygen isotope stratigraphy using benthic foraminifers (Bolivina robusta, Bulimina aculeata and Melonis pompilioides) from cored hemipelagic mudstones enables the lower Pleistocene Otadai and Umegase Formations of the Kazusa Group in the Boso Peninsula, central Japan, a turbidite sequence with high depositional rate (average depositional rate of hemipelagic mudstone: 0.9 m/k.y.), to be correlated with astronomically tuned pelagic sequences. Remarkable correlation between this isotope curve and those from DSDP Site 607 from the North Atlantic, and ODP Site 677 and Site 849 from the tropical Pacific is well demonstrated magnetostratigraphically based on the Jaramillo normal Subchronozone. Numerical age model can be addressed to each oxygen isotope event in the studied sequence applying the age for correlative event in the deep sea sequence. As a result of this study, the ages of events are determined as follows; 1) the first occurrence of Gephyrocapsa parallela: 1038-1041 ka, 2) the marker tephra layers O7, O11, O12 and O16: 1050-1056 ka, 1067-1070 ka, 1073-1078 ka and 1101-1105 ka, respectively, 3) the base of the Jaramillo normal Subchronozone: 1068-1084 ka, and 4) the boundary between the Otadai and Umegase Formations: 1011-1017 ka. The maximum error of the age determination is about 6 k.y.. Average sedimentary rates of turbidite sandstones, hemipelagic mudstones and total sediments are 1.9 m/k.y., 0.9 m/k.y. and 2.8 m/k.y., respectively.
Language:
Japanese
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:41.0005 West:-110.3111 East:
140.1200 South:0.1058
Keywords: Quaternary geology; algae; Asia; assemblages; benthic taxa; biostratigraphy; biozones; Bolivina; Bolivinitidae; Bulimina; Buliminacea; calcareous composition; Cenozoic; chemostratigraphy; Chiba Peninsula; Coccolithophoraceae; Deep Sea Drilling Project; depositional environment; DSDP Site 607; Far East; Foraminifera; geochemistry; Gephyrocapsa; Gephyrocapsa parallela; high-resolution methods; Honshu; Invertebrata; IPOD; isotope ratios; isotopes; Japan; Jaramillo Subchron; Kasamori Formation; Kazusa Group; Kiwada Formation; Kokumoto Formation; Kurotaki Formation; Leg 111; Leg 138; Leg 94; lower Pleistocene; magnetostratigraphy; Mandano Formation; Melonis; microfossils; Miura Group; nannofossils; O-18/O-16; Ocean Drilling Program; ODP Site 677; ODP Site 849; Ohara Formation; Otadai Formation; oxygen; paleoenvironment; paleomagnetism; Plantae; Pleistocene; Protista; Quaternary; Rotaliina; sedimentary rocks; sedimentation; sedimentation rates; Shimosa Group; stable isotopes; turbidite; Umegase Formation;
.