摘要
The HJC profile in the Huangqihai Lake is the result of stacking dating from marine oxygen-isotope stage 3(MIS3a) to modern interglacial period.The deposition types include deep lacustrine facies,shallow lacustrine facies,diluvial facies and eolian facies.To investigate element geochemical characteristics and climatic implications in lacustrine carbonate deposits,acetic acid(HAc) leaching experiments were carried out on lacustrine deposit samples,and the elemental composition of leaching fluid was also analyzed.The leaching experiment revealed the environmental characteristics of all its periods and had sensitive respondency to the humid climate in Early Holocene.In the Huangqihai Lake,the spontaneous carbonate has its own element characteristics,while it also has inherited exogenous component characteristics to some extent.