土壤学报2012，Vol.49Issue(2)：220-229,10.
安徽郎溪黄棕色土-红土二元结构土壤剖面的成因与长江流域第四纪晚期古气候演变
PEDOGENESIS OF YELLOW-BROWN EARTH-RED CLAY PROFILE IN LANGXI COUNTY,ANHUI PROVINCE AND PALEOCLIMATIC CHANGE IN THE YANGTZE RIVER VALLEY,SOUTHEAST CHINA IN THE LATE QUATERNARY PERIOD
摘要
Abstract
Soil profiles of double-layer structure with Yellow-brown Earth ( YBE) overlying Red Clay ( RC ) are commonly seen in the Xuancheng-Langxi-Guangde region, Anhui Province. Particle-size and geochemical characteristics of a selective YBE-RC soil profile in Langxi County, Anhui Province were studied. Results show that the YBE of the studied profile is quite coincident in particle-size composition and geochemical characteristics with that in Xuancheng and Jiu-jiang, and also the Xiashu Loess in Zhenjiang, Jiangsu Province, which strongly suggests that the YBE in the study areas shares the same provenance with the Xiashu Loess, widely distributed along the Yangtze Valley. The Langxi profile is vertically even in particle-size and geochemical characteristics, and also shows continuous transition between YBE and RC without any depositional interruption. This suggests that the underlying RC of the profile shares a similar origin with the YBE and the Xiashu Loess and was derived from typical aeolian-dust deposition. Compared with the YBE, however, the underlying RC is finer in particle-size and more intensively weathered. The transition from the RC to the YBE might record a great paleoclimatic change at the early stage of the Late Pleistocene, when the Last Interglacial ended and the Last Glacial began. However, more work needs to be done to find some irrefutable chronological evidence.关键词
下蜀黄土/红土/粒度分布/地球化学特征/古气候演变Key words
Xiashu Loess/ Red Clay/ Particle-size distribution/ Geochemical characteristics/ Paleoclimatic change分类
农业科技引用本文复制引用
蔡方平,胡雪峰,杜艳,冯建伟..安徽郎溪黄棕色土-红土二元结构土壤剖面的成因与长江流域第四纪晚期古气候演变[J].土壤学报,2012,49(2):220-229,10.基金项目
国家自然科学基金项目(批准号:40971126)资助 （批准号:40971126）
