山西临汾盆地黄土及其形成古环境  

THE LOESS AND THE PALEO-ENVIRONMENT FOR ITS FORMATION IN THE LINFEN BASIN OF SHANXI PROVINCE

作　　者：王克鲁[1] 盛学斌[1] 严富华 刘慧敏 麦学舜 

机构地区：[1]国家地震局地质研究所,中国科学院生态环境研究中心

出　　处：《地震地质》1996年第4期339-348,共10页Seismology and Geology

摘　　要：叙述了临汾盆地黄土地层分布特征，并根据王绪典型黄土剖面孢子花粉、颗粒成分、古土壤特点以及磁化率变化，将王绪剖面划分为１８个气候组及１９个温暖期和２０个干冷期，每个干湿期构成一个气候旋回，这些旋回均可同深海沉积物所揭示的古气候旋回对比。The Linfen basin is situated in the middle part of Shanxi Province,where loess.is widespreadly,successively deposited and forms a complete stratum.Therefore,it is one of comparative ideal area for study of paleoclimate change.The loess in Linfen basin,chrono-logically can be divided into Upper Pleistocene Malan loess,Middle Pleistocene lishi loess,and Lower Pleistocene Wucheng loess.The loess in Linfen basin has been so far in a tectonic uplift environment in the context of its formation.In particular,the tectonic uplift has been more sharp in the post deposition period of the loess,since the later stage of middle pleistocene.The loess in Linfen basin,like that on the middle reach of the Huanghe river, was formed in a arid paleoclimate environment.In the process of their formation,there were 20 alternative warm-humid climate with arid-cold climate and there were 3 notable deterioration phases.Each climatic cycle consists of a warm-humid stage and an arid-cold stage.Totally 18 climate groups can be formed.These climatic groups and climatic cycles can be compared with paleoclimatic Change curve obtained by oxygen isotope study of cores of V28～239 drillholes.

关 键 词：古环境分析 古气候 磁化率 同位素年龄测定 黄土 

分 类 号：P531[天文地球—古生物学与地层学] P597[天文地球—地质学]