Timing of the Tsergo Ri landslide, Langtang Himal, determined by fission-track dating of pseudotachylyte

Hideo Takagi; Kazunori Arita; Tohru Danhara; Hideki Iwano

doi:10.1016/j.jseaes.2005.12.002

Timing of the Tsergo Ri landslide, Langtang Himal, determined by fission-track dating of pseudotachylyte

Hideo Takagi^*, Kazunori Arita, Tohru Danhara, Hideki Iwano

^*Corresponding author for this work

School of Education

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

24 Citations (Scopus)

Abstract

Fission-track dating was carried out on zircon grains from pseudotachylyte associated with a Late Pleistocene landslide (Tsergo Ri landslide) in Langtang Himal, Nepal. Zircon grains were separated from an injection pipe of glassy and vesicular pseudotachylyte about 10 cm in diameter. The resulting age of 51±13 Ka lies between the two subpeaks (70 and 20 Ka) of the Würm glacial period, and is concordant with the previous age estimate from geomorphological evidence (i.e. older than 25-30 Ka). This is the first reliable isotopic age for a landslide-generated pseudotachylyte excluding the possibility of contamination by an inherited age.

Original language	English
Pages (from-to)	466-472
Number of pages	7
Journal	Journal of Asian Earth Sciences
Volume	29
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jseaes.2005.12.002
Publication status	Published - 2007 Feb 1

Keywords

Fission track dating
Langtang Himal
Pseudotachylyte
Tsergo Ri landslide

ASJC Scopus subject areas

Geology
Earth-Surface Processes

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10.1016/j.jseaes.2005.12.002

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title = "Timing of the Tsergo Ri landslide, Langtang Himal, determined by fission-track dating of pseudotachylyte",

abstract = "Fission-track dating was carried out on zircon grains from pseudotachylyte associated with a Late Pleistocene landslide (Tsergo Ri landslide) in Langtang Himal, Nepal. Zircon grains were separated from an injection pipe of glassy and vesicular pseudotachylyte about 10 cm in diameter. The resulting age of 51±13 Ka lies between the two subpeaks (70 and 20 Ka) of the W{\"u}rm glacial period, and is concordant with the previous age estimate from geomorphological evidence (i.e. older than 25-30 Ka). This is the first reliable isotopic age for a landslide-generated pseudotachylyte excluding the possibility of contamination by an inherited age.",

keywords = "Fission track dating, Langtang Himal, Pseudotachylyte, Tsergo Ri landslide",

author = "Hideo Takagi and Kazunori Arita and Tohru Danhara and Hideki Iwano",

note = "Funding Information: We acknowledge Dr K. Asahi, Hokkaido University for giving us valuable comments about the Tsergo Ri landslide. Field work in the Langtang Valley was supported by Dr T. Sawaguchi (Waseda Univ.) and by JSPS Grant-in-Aid for International Scientific Research (to K. Arita, Grant No. 11691112). Sample analysis was supported partly by Waseda University Grant for Special Research Projects (Grant No. 2001B-008). ",

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AU - Takagi, Hideo

AU - Arita, Kazunori

AU - Danhara, Tohru

AU - Iwano, Hideki

N1 - Funding Information: We acknowledge Dr K. Asahi, Hokkaido University for giving us valuable comments about the Tsergo Ri landslide. Field work in the Langtang Valley was supported by Dr T. Sawaguchi (Waseda Univ.) and by JSPS Grant-in-Aid for International Scientific Research (to K. Arita, Grant No. 11691112). Sample analysis was supported partly by Waseda University Grant for Special Research Projects (Grant No. 2001B-008).

PY - 2007/2/1

Y1 - 2007/2/1

N2 - Fission-track dating was carried out on zircon grains from pseudotachylyte associated with a Late Pleistocene landslide (Tsergo Ri landslide) in Langtang Himal, Nepal. Zircon grains were separated from an injection pipe of glassy and vesicular pseudotachylyte about 10 cm in diameter. The resulting age of 51±13 Ka lies between the two subpeaks (70 and 20 Ka) of the Würm glacial period, and is concordant with the previous age estimate from geomorphological evidence (i.e. older than 25-30 Ka). This is the first reliable isotopic age for a landslide-generated pseudotachylyte excluding the possibility of contamination by an inherited age.

AB - Fission-track dating was carried out on zircon grains from pseudotachylyte associated with a Late Pleistocene landslide (Tsergo Ri landslide) in Langtang Himal, Nepal. Zircon grains were separated from an injection pipe of glassy and vesicular pseudotachylyte about 10 cm in diameter. The resulting age of 51±13 Ka lies between the two subpeaks (70 and 20 Ka) of the Würm glacial period, and is concordant with the previous age estimate from geomorphological evidence (i.e. older than 25-30 Ka). This is the first reliable isotopic age for a landslide-generated pseudotachylyte excluding the possibility of contamination by an inherited age.

KW - Fission track dating

KW - Langtang Himal

KW - Pseudotachylyte

KW - Tsergo Ri landslide

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SN - 1367-9120

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JO - Journal of Asian Earth Sciences

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ER -

Timing of the Tsergo Ri landslide, Langtang Himal, determined by fission-track dating of pseudotachylyte

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Keywords

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