Orbital forcing of Plio-Pleistocene climate variation in a Qaidam Basin lake based on paleomagnetic and evaporite mineralogic analysis

Zeng Luo, Qingda Su, Zhao Wang, Richard V. Heermance, Carmala Garzione, Man Li, Xueping Ren, Yougui Song, Junsheng Nie

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Inland Asian aridification is threatening the global ecological system under continued global warming, requiring a full understanding of its forcing mechanisms. Past geological studies in this region focus mainly on initiation timing and million-year timescale variations in aridification. Few studies address the relationship between aridification and insolation forcing. Here we present a paleomagnetic and evaporite mineralogic study of the 476-m-long Huatugou (HTG) section (ca. 3.9 to 2.1 Ma) from the western Qaidam Basin. The results show that the drying of this part of the basin began by at least 3.9 Ma. Furthermore, we show that the relative content variation of evaporite minerals was dominated by 100-kyr cyclicity during the Pliocene. This is consistent with the result from the Xining area during the late Eocene. These results suggest that mid-latitude lacustrine evaporite minerals in semi-arid to arid regions are particularly sensitive to eccentricity forcing, improving understanding of aridification forcing at orbital timescales.

Original languageEnglish (US)
Pages (from-to)31-39
Number of pages9
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume510
DOIs
StatePublished - Dec 1 2018
Externally publishedYes

Keywords

  • Aridification
  • Eccentricity
  • Huatugou section
  • Insolation forcing

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Palaeontology

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