漳卫河流域中更新世晚期以来沉积物特征及古环境分析  

Sediment of the Early Middle Pleistoch in the Zhangwei River Basin and Palaeoenvironment Analysis

作　　者：王诗淇 杨振京 王利康 WANG Shi-qi;YANG Zhen-jing;WANG Li-kang(College of Resources,Hebei GEO University,Shijiazhuang 050031,China;Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution,Chinese Academy of Geological Sciences,Shijiazhuang 050803,China)

机构地区：[1]河北地质大学资源学院,石家庄050031 [2]中国地质科学院第四纪年代学与水文环境演变重点实验室,石家庄050803

出　　处：《科学技术与工程》2020年第23期9273-9281,共9页Science Technology and Engineering

基　　金：中国地质调查局项目(DD20160239)。

摘　　要：通过漳卫河流域ZKD-3钻孔前78.6 m沉积物的光释光测年结果和粒度、磁化率测试结果进行分析,还原了漳卫河流域220 ka B.P.以来的古环境的演化历史。根据测试结果,可将漳卫河流域220 ka B.P.(距今220千年)以来古环境分为5个变化阶段:223.4~196.5 ka B.P.气候温暖湿润;196.3~187.3 ka B.P.气候开始转向寒冷干燥;185.6~87.4 ka B.P.气候为寒冷干燥,并逐渐转向温暖湿润;84.5~12.6 ka B.P.气候整体为寒冷干燥;9.87~0.68 ka B.P.经历了温凉略干→温暖湿润→温凉偏干。漳卫河流域的气候演化既具有全球气候变化一致性特征,同时也受区域特征的影响。Based on the analysis of OSL dating, grain size, mineral-magnetism measurement, the evolution of paleoenvironment of Zhangwei River basin was restored since 220 ka.B.P.. Sediments were sampled from the depth 78.6 m in the Zhangwei River Basin. The evolution processes was divided into the following 5 periods. During 223.4 ka B.P. to 196.5 ka B.P., the climate was warm and humid in this period. Then, in 194.62 ka B.P. to 187.33 ka B.P., the climate turned into cold and dry. In the period of 185.6 ka B.P. to 87.4 ka B.P., the climate was cold and dry, while gradually getting warm and humid. In the period of 84.5 ka B.P. to 12.6 ka B.P., the climate was cold and dry generally. In 9.87 ka B.P. to 0.68 ka B.P., the climate got warm and wet and in this period the climatic changed. It was slightly cold and moderately dry at the first, then, turned to warm and humid, next warm and humid, finally, it was slightly worm and moderately dry. The results show that climate evolution is not only consistent with the characteristics of the global synchronization, but also affected by the characteristics of the region.

关 键 词：漳卫河流域 沉积物 粒度 磁化率 古环境 

分 类 号：P534.63[天文地球—第四纪地质学]