Origin, development and evolutionary model of shelf desertization environment in late stage of Upper Pleistocene |
| |
| Authors: | Songling Zhao Hongjun Yu Jingpu Liu |
| |
| Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China |
| |
| Abstract: | Based on the study of palaeo-environmental evolution in the shelves of the Eastern China Seas, the concept of “shelf desertization”
in the late stage of Upper Pleistocene is defined; the environmental background and evolutionary process of shelf desertization
are analysed. Study on the records of subbottom profiling and the data of core samples from shelf areas revealed that during
low sea-level stages, the sedimentary environment in the exposed shelf plains was dominated by aeolian depositional process
under cold and dry climatic conditions, i.e. under the action of strong winter-monsoon winds. Parts of the exposed marine
strata were disintegrated, and aeolian sand dunes were formed on the disintegrated marine deposits, from which the finer sediment
grains were blown away by wind and deposited in the downwind areas to form the derivative loess deposits. Thus a desertization
environmental system was formed in the exposed shelf plains of the Eastern China Seas. |
| |
| Keywords: | shelf desertization late stage of Upper Pleistocene dune loess |
| 本文献已被 SpringerLink 等数据库收录！ |
|
