鄱阳湖湖口地区4500年来环境变迁

Environmental Evolution since 4500 aBP in Hukou Area, Poyang Lake

通过对ＺＫ２孔多环境代用指标的综合分析，重建了４５００年来鄱阳湖湖口地区古环境历史，研究表明：４５００ａＢＰ以来，鄱阳湖湖口地区经历了多次冷暖、干湿交替，沉积环境也经历了三角洲（３８００ａＢＰ以前）→古赣江河流（３８００－３４００ａＢＰ）→三角洲（３４００－３３００ａＢＰ）。

Based on the charateristics of environmental index in respect of granularity, magnetic susceptibility, TOC, δ^(13) C and pollen of sediment from ZK2 profile which located in Meijiazhou (116°12′ 50″E, 29°44′ 30″N) in Hukou area, Poyang Lake, the paleoenvironmental evolution sequence of Hukou area for over 4500 years has been rebuilt. As a result, the sequence of the paleoenvironmental evolution in Hukou area includes four stages as: (1)4500 - 3800aBP, it belonged to the stage of hot and wet, inlake delta; (2) 3800 - 3400aBP, cool and dry, river; (3 ) 3400 - 2300aBP, climate fluctuated, inlake delta to lake; (4) 2300aBP onwards, cool, floodland.