Probe into the origin, development development and evolution model of shelf desertizational environment in the last stage of late pleistocene

摘要

Based on study of China's shelf paleoenvironment, this paper summarises the defini- tion of shelf desertization that occurred in the last stage of Late Pleistocence, and discusses the background of its formation and evolution process. Study of shallow layer profiler records and core data revealed that cold-dry Aeolian erosion was the major exogenic for on the exposed shelf. Under the prevailing paleo- winter monsoon, part of the exposed marine stratum disintegrated into sand and then desertization oc- curred. The fine sediments were blown away and deposited on the leeward to form derivative loess de- posits.