摘要
The terminal Huangqihai Lake is located at the northern margin of the modern East Asian summer monsoon, and its evolution is sensitive to climate changes. Profile H3 is a few kilometers away to the southeast of the lake which was consisted of fine sand and silt deposited during ca 8.5~2.0 ka BP. The enrichment of Ti, Zr, Mn and Rb probably were the fragmentating characteristics of their silicate minerals, and that of Sr was caused by lacstrine autogenic carbonate. Zrc/(Rbc+Bac)ratio, Zrc/Rbc ratio, and the grain size effect of Zr and Ti(or Tic/Tif, Zrc/Zrf) showed the relative content of heavy and light minerals, which indicated the intensity of erosion in basin and transportation from basin to lake, and lake enlarging and reducing information.