末次冰消期以来古猪野泽湖相地层沉积学及湖面波动历史Lacustrine Strata Sedimentology and Lake-level History in Ancient Zhuyeze Lake Since the Last Deglaciation
赵强,王乃昂,李秀梅
摘要(Abstract)：
本文选取古猪野泽地区的青土湖剖面、西渠剖面、沙坑井剖面、九坨墚剖面作为研究对象,通过广泛野外地貌考察、剖面地层对比,作者认为古猪野泽最高湖面的海拔高度为1313~1315m,气候变化自末次冰期以来共经历了2个成湖期(13000~9500 yr BP、6700~1100 yr BP)。9500~6700 yr BP期间,本区域基本都沉积了风成砂,湖泊岸堤的14C测年均未发现早全新世高湖面的证据。通过地球物理化学指标分析及可靠14C测年,重建了区域末次冰消期以来的气候干湿变化历史:15800~13000 yr BP,为冷干的气候环境;13000~9500 yrBP,为凉湿的气候环境;9500~6700 yr BP,为暖干的气候环境;6700~4300 yr BP,为暖湿的气候环境,其中6700~5650 yr BP为气候最适宜期;4300~2700 yr BP,为干旱/湿润的过渡时期;2700~0 yr BP,为干旱的气候环境。
关键词(KeyWords)： 古猪野泽;湖相沉积地层;环境演变
基金项目(Foundation): 济南大学博士启动基金(B0534);; 国家自然科学基金(40471138)
作者(Author): 赵强,王乃昂,李秀梅
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