Magnetostratigraphy of Cenozoic deposits in the western Qaidam Basin and its implication for the surface uplift of the northeastern margin of the Tibetan Plateau

Hong Chang, Leyi Li, Xiaoke Qiang, Carmala N. Garzione, Alexander Pullen, Zhisheng An

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

Abstract

Thick Cenozoic deposits in the northwestern Qaidam Basin record erosion of the Altyn Tagh and high terrain west of that basin and presumably the concurrent growth of the northeastern Tibetan Plateau. A detailed magnetostratigraphic study of the Huatugou section, northwestern Qaidam basin, reveals that this section spans the period from ~30 to ~11 Ma. Magnetostratigraphic and sedimentological studies indicate that the accumulation rate abruptly increased near ~15 Ma. The acceleration in sedimentation rate suggests enhanced tectonic deformation in the Qaidam basin since 15 Ma that may have begun simultaneously with accelerated deformation along the Altyn Tagh, Kunlun, and Haiyuan faults, which contributed to the growth history of the Qaidam basin and its surroundings since ~15 Ma.

Original languageEnglish (US)
Pages (from-to)271-283
Number of pages13
JournalEarth and Planetary Science Letters
Volume430
DOIs
StatePublished - Nov 15 2015
Externally publishedYes

Keywords

  • Accumulation rate
  • Altyn Tagh fault
  • Huatugou section
  • Magnetostratigraphy
  • Qaidam basin
  • Tectonic uplift

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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