A 20-ka climate record from Central Himalayan loess deposits

R. K. Pant, N. Basavaiah, N. Juyal, N. K. Saini, M. G. Yadava, E. Appel, A. K. Singhvi

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

The southwest monsoon that dominated Central Himalaya has preserved loessic silt deposits preserved in patches that are proximal to periglacial areas. The occurrence of such silts suggests contemporary prevalence of cold and dry northwesterly winds. Field stratigraphy, geochemistry, mineral magnetism, infrared stimulated luminescence (IRSL) and radiocarbon dating has enabled reconstruction of an event chronology during the past 20 ka. Three events of loess accretion could be identified. The first two events of loess deposition occurred betweem 20 and 9 ka and were separated by a phase of moderate weathering. Pedogenesis at the end of this event gave rise to a well-developed soil that was bracketed around 9 to >4 ka. This was followed by the third phase of loess accretion that occurred around 4 to > 1 ka. Episodes of loess deposition and soil formation are interpreted in terms of changes in the strength of the Indian southwest monsoon.

Original languageEnglish
Pages (from-to)485-492
Number of pages8
JournalJournal of Quaternary Science
Volume20
Issue number5
DOIs
Publication statusPublished - Jul 2005
Externally publishedYes

Keywords

  • Central Himalayas
  • Geochemistry
  • Loess
  • Luminescence dating
  • Mineral magnetism
  • Monsoon

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Earth and Planetary Sciences (miscellaneous)
  • Paleontology

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