古土壤记录的内蒙古沙区全新世环境变化  

Environment Changes of Sand Fields in Inner Mongolia,China since the Holocene Recorded by Sandy Paleosol

作　　者：杨萍[1] 叶玮[1] 

机构地区：[1]浙江师范大学地理与环境科学学院,浙江金华321004

出　　处：《中国沙漠》2013年第6期1670-1677,共8页Journal of Desert Research

基　　金：国家重点基础研究发展计划项目(2010CB950203);国家自然科学基金项目(41371206)资助

摘　　要：古土壤是发育于地质历史时期埋藏的自然土壤，是记录占环境信息的重要载体。本文基于对内蒙古沙区占土壤研究义献的梳理，通过古土壤测年数据统计，对比区内其他信息载体的研究成果，分析内蒙古沙区沙漠／沙地形成时代及全新世环境变化。结果表明：内蒙古沙区全新世环境变化可分为3个阶段：全新世早期（10～8．5kaBP）为升温阶段，气候以干冷为主；全新世中期（8．5～2．5kaBP）为气候适宜期，占土壤普遍发育，同时存在短期十冷波动；全新世晚期（2．5kaBP以来）为降温期，气候逐步十冷，部分沙地气候波动频繁，形成古土壤。Paleosol originates from the natural soil buried during the geological period. It is an important in formation carrier of paleoenvironment. Based on the gathering and combing of documents about paleosol of the sand fields in Inner Mongolia, China, this paper analyzed environmental changes during the desertfor mation period and the Holocene in Inner Mongolia through the analysis of paleosol dating data, and in com parison with research results of other information carriers in the region. The environmental changes in the Holocene can be divided into three phases： early Holocene （108.5 ka BP） is the heatingup phase, with cold and dry climate; mid Holocene （8.52.5 ka BP） is a phase when the climate is very pleasant and the paleosol is commonly developed, but there are fluctuations of shortterm dry and cold climate; late Holocene （2.5 ka BP and above） is coolingdown and paleosolforming phase when the climate gradually turn dry and cool.

关 键 词：沙区 古土壤 全新世 环境变化 内蒙古 

分 类 号：P532[天文地球—古生物学与地层学]