Diatom biostratigraphy of Lake Baikal during the past 1.25 Ma: New results from BDP-96-2 and BDP-99 drill cores

Galina K. Khursevich; Alexander A. Prokopenko; Svetlana A. Fedenya; Lilia I. Tkachenko; Douglas F. Williams

doi:10.1016/j.quaint.2004.11.011

Diatom biostratigraphy of Lake Baikal during the past 1.25 Ma: New results from BDP-96-2 and BDP-99 drill cores

Galina K. Khursevich, Alexander A. Prokopenko, Svetlana A. Fedenya, Lilia I. Tkachenko, Douglas F. Williams

Continental Scientific Drilling Facility

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Detailed diatom zonation in the Lake Baikal holostratotype section BDP-96-2 is extended over the interval 0.85-1.25 Ma and compared with diatom assemblage composition from the new BDP-99 drill core. Interglacial diatom assemblages at these two sites over 220 km apart are of similar composition, and the same complete and continuous succession of diatom zones is observed in both drill cores over the 0-800 ka interval. We propose a correlation of Baikal diatomaceous intervals with the marine oxygen isotope stratigraphy and with European climato-stratigraphic divisions of the early Pleistocene. We then use the diatom succession in BDP-96-2 to demonstrate evidence for disconformity in BDP-99 and to establish an approximate age model for this section. Diatom assemblages characteristic of the top of the Matuyama reversed polarity interval and the upper part of the Jaramillo normal polarity subchron are not found in the BDP-99 section below the disconformity boundary. The lack of diatom zones corresponding to the MIS 21-27 of the marine oxygen isotope stratigraphy in BDP-99 section suggests that the estimated age span of missing sediment interval in BDP-99 is ca 150-160 ka. The unusual diatom assemblage of cosmopolitan species during MIS 33 in both BDP-96-2 and BDP-99 drill core sections is indicative of abrupt ecological changes in the time interval 1.12-1.08 Ma.

Original language	English (US)
Pages (from-to)	95-104
Number of pages	10
Journal	Quaternary International
Volume	136
Issue number	1 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.quaint.2004.11.011
State	Published - Jul 2005

Bibliographical note

Funding Information:
This work was implemented as a part of the Baikal Drilling Project supported by NSF Grant EAR-9614770, the Siberian Branch of the Russian Academy of Sciences, the Russian Ministry of Geology, and by the Science and Technology Agency (STA) of Japan. We thank the scientific drilling team of Nedra Enterprise, the crew of R/V Ulan-Ude and the scientists of the Institute of Geochemistry and Institute of the Earth Crust (Irkutsk) who participated in the primary description and sampling of the BDP drill cores. The authors are particularly thankful to E. Kerber for putting the BDP-99 core description data into digital format. We would also like to thank an anonymous reviewer for extensive constructive comments.

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

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@article{e88a3884da08402699e95bea740347c3,

title = "Diatom biostratigraphy of Lake Baikal during the past 1.25 Ma: New results from BDP-96-2 and BDP-99 drill cores",

abstract = "Detailed diatom zonation in the Lake Baikal holostratotype section BDP-96-2 is extended over the interval 0.85-1.25 Ma and compared with diatom assemblage composition from the new BDP-99 drill core. Interglacial diatom assemblages at these two sites over 220 km apart are of similar composition, and the same complete and continuous succession of diatom zones is observed in both drill cores over the 0-800 ka interval. We propose a correlation of Baikal diatomaceous intervals with the marine oxygen isotope stratigraphy and with European climato-stratigraphic divisions of the early Pleistocene. We then use the diatom succession in BDP-96-2 to demonstrate evidence for disconformity in BDP-99 and to establish an approximate age model for this section. Diatom assemblages characteristic of the top of the Matuyama reversed polarity interval and the upper part of the Jaramillo normal polarity subchron are not found in the BDP-99 section below the disconformity boundary. The lack of diatom zones corresponding to the MIS 21-27 of the marine oxygen isotope stratigraphy in BDP-99 section suggests that the estimated age span of missing sediment interval in BDP-99 is ca 150-160 ka. The unusual diatom assemblage of cosmopolitan species during MIS 33 in both BDP-96-2 and BDP-99 drill core sections is indicative of abrupt ecological changes in the time interval 1.12-1.08 Ma.",

author = "Khursevich, {Galina K.} and Prokopenko, {Alexander A.} and Fedenya, {Svetlana A.} and Tkachenko, {Lilia I.} and Williams, {Douglas F.}",

note = "Funding Information: This work was implemented as a part of the Baikal Drilling Project supported by NSF Grant EAR-9614770, the Siberian Branch of the Russian Academy of Sciences, the Russian Ministry of Geology, and by the Science and Technology Agency (STA) of Japan. We thank the scientific drilling team of Nedra Enterprise, the crew of R/V Ulan-Ude and the scientists of the Institute of Geochemistry and Institute of the Earth Crust (Irkutsk) who participated in the primary description and sampling of the BDP drill cores. The authors are particularly thankful to E. Kerber for putting the BDP-99 core description data into digital format. We would also like to thank an anonymous reviewer for extensive constructive comments. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

year = "2005",

month = jul,

doi = "10.1016/j.quaint.2004.11.011",

language = "English (US)",

volume = "136",

pages = "95--104",

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T1 - Diatom biostratigraphy of Lake Baikal during the past 1.25 Ma

T2 - New results from BDP-96-2 and BDP-99 drill cores

AU - Khursevich, Galina K.

AU - Prokopenko, Alexander A.

AU - Fedenya, Svetlana A.

AU - Tkachenko, Lilia I.

AU - Williams, Douglas F.

N1 - Funding Information: This work was implemented as a part of the Baikal Drilling Project supported by NSF Grant EAR-9614770, the Siberian Branch of the Russian Academy of Sciences, the Russian Ministry of Geology, and by the Science and Technology Agency (STA) of Japan. We thank the scientific drilling team of Nedra Enterprise, the crew of R/V Ulan-Ude and the scientists of the Institute of Geochemistry and Institute of the Earth Crust (Irkutsk) who participated in the primary description and sampling of the BDP drill cores. The authors are particularly thankful to E. Kerber for putting the BDP-99 core description data into digital format. We would also like to thank an anonymous reviewer for extensive constructive comments. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2005/7

Y1 - 2005/7

N2 - Detailed diatom zonation in the Lake Baikal holostratotype section BDP-96-2 is extended over the interval 0.85-1.25 Ma and compared with diatom assemblage composition from the new BDP-99 drill core. Interglacial diatom assemblages at these two sites over 220 km apart are of similar composition, and the same complete and continuous succession of diatom zones is observed in both drill cores over the 0-800 ka interval. We propose a correlation of Baikal diatomaceous intervals with the marine oxygen isotope stratigraphy and with European climato-stratigraphic divisions of the early Pleistocene. We then use the diatom succession in BDP-96-2 to demonstrate evidence for disconformity in BDP-99 and to establish an approximate age model for this section. Diatom assemblages characteristic of the top of the Matuyama reversed polarity interval and the upper part of the Jaramillo normal polarity subchron are not found in the BDP-99 section below the disconformity boundary. The lack of diatom zones corresponding to the MIS 21-27 of the marine oxygen isotope stratigraphy in BDP-99 section suggests that the estimated age span of missing sediment interval in BDP-99 is ca 150-160 ka. The unusual diatom assemblage of cosmopolitan species during MIS 33 in both BDP-96-2 and BDP-99 drill core sections is indicative of abrupt ecological changes in the time interval 1.12-1.08 Ma.

AB - Detailed diatom zonation in the Lake Baikal holostratotype section BDP-96-2 is extended over the interval 0.85-1.25 Ma and compared with diatom assemblage composition from the new BDP-99 drill core. Interglacial diatom assemblages at these two sites over 220 km apart are of similar composition, and the same complete and continuous succession of diatom zones is observed in both drill cores over the 0-800 ka interval. We propose a correlation of Baikal diatomaceous intervals with the marine oxygen isotope stratigraphy and with European climato-stratigraphic divisions of the early Pleistocene. We then use the diatom succession in BDP-96-2 to demonstrate evidence for disconformity in BDP-99 and to establish an approximate age model for this section. Diatom assemblages characteristic of the top of the Matuyama reversed polarity interval and the upper part of the Jaramillo normal polarity subchron are not found in the BDP-99 section below the disconformity boundary. The lack of diatom zones corresponding to the MIS 21-27 of the marine oxygen isotope stratigraphy in BDP-99 section suggests that the estimated age span of missing sediment interval in BDP-99 is ca 150-160 ka. The unusual diatom assemblage of cosmopolitan species during MIS 33 in both BDP-96-2 and BDP-99 drill core sections is indicative of abrupt ecological changes in the time interval 1.12-1.08 Ma.

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Diatom biostratigraphy of Lake Baikal during the past 1.25 Ma: New results from BDP-96-2 and BDP-99 drill cores

Abstract

Bibliographical note

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