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Chinese Science Bulletin

, Volume 44, Issue 4, pp 372–375 | Cite as

Origin of illites in the Luochuan loess section

Evidence from TEM study
  • Junfeng Ji
  • Jun Chen
  • Huayue Lu
Notes

Abstract

Morphology and composition of illite from the Luochuan loess section were investigated by TEM. The results show that most of the illite grains are characterized by rounded shapes and chemical compositions are closely similar to those of anchizonal illites. The enrichment of illites in paleosol over loess was mainly caused by the weak winter monsoon during the interglacial periods, and was not related to thein situ pedogenesis. Illite can serve as an indicator for tracing eolian dust from Loess Plateau in pelagic and lacustrine sediments.

Keywords

loess illite origin 

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Copyright information

© Science in China Press 1999

Authors and Affiliations

  • Junfeng Ji
    • 1
  • Jun Chen
    • 1
  • Huayue Lu
    • 2
  1. 1.Department of Earth Sciences, State Key Laboratory of Mineral Deposit ResearchNanjing UniversityNanjingChina
  2. 2.Xi’an Laboratory of Loess and Quaternary GeologyChinese Academy of SciencesXi’anChina

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