Abstract
The Tanigumi core records the content, grain size of inorganic material, and ESR intensity of fine quartz between 43ka and 12ka and reveals changes in the deposition and trajectory of eolian dust from the Asian continent. The inorganic material content during isotope stage 3 was 0.1 to 1.35g/cm3, and fluctuated more widely than that of isotope stage 2. Fine inorganic material (≤20μm) from 43ka to 25ka, consists of eolian dust derived from the North Asian continent as a result of the NW winter monsoon. The median diameter of inorganic material consisting of eolian dust range from 3 to 6μm. Between 25ka and 19ka, the inorganic material content was 0.1 to 0.9g/cm3, and eolian dust was transported from the Chinese mid-latitude arid zone by summer westerlies. After 19ka, the inorganic material content was 0.1 to 0.35g/cm3, and the median diameter of inorganic material, which consists of a local fluvial material, increased gradually.
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