Magnetostratigraphy and rock magnetism of the Neogene Kuitun He section (northwest China): Implications for Late Cenozoic uplift of the Tianshan mountains

Julien Charreau, Yan Chen, Stuart Gilder, Stéphane Dominguez, Jean Philippe Avouac, Sevket Sen, Dongjiang Sun, Yongan Li, Wei Ming Wang

Research output: Contribution to journalArticle

156 Citations (Scopus)

Abstract

In order to better constrain the tectonic evolution of central Asia under the influence of the India-Asia collision, we carried out a magnetostratigraphic study at the Kuitun He section, on the northern flank of the Tianshan range (northwest China). A total of 801 samples were collected from a 1559-m-thick section, which is composed mainly of fluvio-lacustrine sandstone and conglomerate. Stepwise thermal and alternating field demagnetization isolated a linear magnetization component that decays univectorally toward the origin and likely represents a primary magnetization principally carried by magnetite. From this component, 29 magnetic polarity intervals were identified. They correlate between ∼3.1 and ∼10.5 Ma with the reference magnetic polarity time scale, indicating a relatively constant sedimentation rate with an average of 0.21±0.01 mm/year. We also performed a suite of rock magnetic experiments designed to track time-transgressive changes in the sedimentary record. From the rock magnetic parameters, together with the constant sedimentation rate, we conclude that the Tianshan mountains were actively uplifting by ∼10.5 Ma.

Original languageEnglish
Pages (from-to)177-192
Number of pages16
JournalEarth and Planetary Science Letters
Volume230
Issue number1-2
DOIs
Publication statusPublished - 30 Jan 2005

Keywords

  • AMS
  • Magnetostratigraphy
  • Tianshan
  • Uplift

Fingerprint Dive into the research topics of 'Magnetostratigraphy and rock magnetism of the Neogene Kuitun He section (northwest China): Implications for Late Cenozoic uplift of the Tianshan mountains'. Together they form a unique fingerprint.

  • Cite this