甘肃葫芦河流域中全新世环境演化及其对人类活动的影响  

A PRELIMINARY STUDY ON THE PALEOENVIRONMENT OF THE MIDDLE HOLOCENE IN THE HULU RIVER AREA IN GANSU PROVINCE AND ITS EFFECTS ON HUMAN ACTIVITY

作　　者：莫多闻[1] 李非[1] 李水城 孔昭宸[1] 

机构地区：[1]北京大学地理系,北京大学考古系,中国科学院植物研究所

出　　处：《地理学报》1996年第1期59-69,共11页Acta Geographica Sinica

基　　金：国家自然科学基金;中国科学院重大项目

摘　　要：本文对甘肃葫芦河流域第一级阶地剖面的地层进行了观察，并对秦安大地湾附近第一级阶地沉积剖面的沉积相、粘土矿物、碳酸钙、孢粉等古环境指标进行了分析，据此初步恢复了该地区大约距今８０００年至３０００年左右的环境演变过程。并讨论了该地区古环境变化与古人类活动规模和古文化特征的变化之间的关系。Hulu River drainage area is located in eastern Gansu and southern Ningxia, which is west of Lupan Mountain in middle Loess Plateau. The middle Holocene strata were well developed on the first terrace of the Hulu River and its tributaries. The paleoenvironment is established by the analyses of sedimentary characteristics, clay minerals, carbonates and pollens in the deposits ors the terrace. The climate changes remarkablly affected the ancient civilization in the region.The early Holocene stratum can be seen at the bottom of the first terrace, which mainly consists of alluvial loessic deposits. The clay minerals are mainly illites and the pollens are mainly herbs,which shows a relatively dry and cool paleoclimate. There was no ancient civilization during this period in this region.The early-middle Holocene stratum lies in the lower part of the first terrace, which is mainly composed of alluvial and lacustrine silts and clay. The alluvial gravels can also be found in some places, which indicates a warm and humid paleoclimate. A climate change is found by the sedimentary analyses. It was the warmest and the most humid from 8 000 to 6 000 aBP. The contents of kaolinite and montmorillonite are high. The pollens indicates a wooded grassland or a forest flora of coniferous and broadleaf trees. The favourable natural conditions resulted in the appearances andrapidly development of ancient civilizations. The first stage of Dadiwan civilization (7 800- 7 300aBP) shows some relatively advanced characteristics with big ancient communities (based on the size of the sites), appearances of colourful pottery and agriculture. The early Yangshao civilization (6 800- 6 000 aBP) shows some developmental features. The communities were still big and the number of communities was increased. From 6 000- 5 000 aBP the clay mineral association and the pollen spectrum indicate a slighty dry and cool paleoclimate. The technology of production and pottery making of the middle and late Yangshao civilization during this period had some develop

关 键 词：葫芦河流域 中全新世 环境演变 古人类活动 

分 类 号：Q981[天文地球—古生物学与地层学]