Climatic Changes in the Middle and Late Period of the Last Glacial Period in Liaohua Section of Jiujiang, Jiangxi Province Recorded by End-Member Grain Size

• Published in: Redai dili Vol. 43; no. 1; pp. 135 - 143
• Main Authors: Li Shiqian, Li Zhiwen, Zhou Wanpeng, Du Dingding, Li Wubiao
• Format: Journal Article
• Language: Chinese
• Published: Editorial Committee of Tropical Geography 01.01.2023
• Subjects: climate change; grain-size end-member analysis; jiujiang city; liaohua section; middle and late last glacial; monsoon evolution
• ISSN: 1001-5221
• DOI: 10.13284/j.cnki.rddl.003605

Late Quaternary aeolian sediment sequences are widely distributed in the Poyang Lake area and are good subjects for climate evolution research. However, previous studies have focused mainly on aeolian sediments and less on lacustrine facies and their overlapping accumulation with aeolian sands. Therefore, after field investigations in Shaling Mountain, Xingzi County, the Liaohua section was selected as the study area where we tested the geological age and grain size, analyzed the grain size results by end-member analysis model, and compared the end-member component content with the average grain size and standard deviation. Oxygen isotopes of stalagmites in YZ Cave, Chongqing, and Greenland ice core records were analyzed. We also discussed the climate change law in the middle and late periods of the last glacial period in this area to source basic data for the response of the last glacial deposits in the Poyang Lake area to the East Asian monsoon and even the whole world. The results show the following: 1) Th