太原盆地QK1钻孔60 ka.B.P.以来气候环境演化的沉积记录  

Sedimentary Records of Climatic and Environmental Evolution since the 60ka.B.P.of QK1 Borehole in Taiyuan Basin

作　　者：刘玮 王利康 杨振京[1] 毕志伟[1] 宁凯 杨庆华[1] LIU Wei;WANG Li-kang;YANG Zhen-jing;BI Zhi-wei;NING Kai;YANG Qing-hua(Institute of Hydrologic and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China;School of Resources,Hebei GEO University,Shijiazhuang 050031,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061 [2]河北地质大学资源学院,石家庄050031

出　　处：《科学技术与工程》2020年第2期489-496,共8页Science Technology and Engineering

基　　金：中国地质科学院基本科研业务费专项经费(SK201609);中国地质调查局地质调查项目(12120114086401)。

摘　　要：通过对太原盆地QK1钻孔60 ka.B.P.以来的沉积物进行粒度、磁化率分析,探讨了太原盆地60 ka.B.P.以来的气候环境演化过程。太原盆地60 ka.B.P.以来主要经历了以下演化阶段:59.6~40 ka.B.P.属滨湖相沉积;40~31.5 ka.B.P.属以河流相漫滩沉积;31.5~14.58 ka.B.P.属河流相边滩沉积;14.58~12.5 ka.B.P.河流相漫滩沉积;12.5~9 ka.B.P.河漫湖泊沉积;9 ka.B.P.至今属河流相边滩沉积。60 ka.B.P.以来太原盆地的气候由温暖偏湿转为温暖湿润,在末次冰期表现为寒冷干燥,进入全新世大暖期以后,气候具有全球性特征的同时也兼具区域性特点。各指标分析表明太原盆地的气候环境演化主要受全球性气候变化及区域气候的影响,由于盆地沉降中心与边缘沉积速率的差异,在一定程度上受到地区构造活动的影响。Based on the analyses of grain size and magnetic susceptibility of sediments from QK1 borehole in Taiyuan Basin since 60 ka.B.P.(before present),the evolution of climate environment in Taiyuan Basin was studied.The Taiyuan Basin experienced the following evolutionary stages since 60 ka.B.P.Between 59.6~40 ka.B.P.was in lake beach,40~31.5 ka.B.P.in river floodplain,31.5~14.58 ka.B.P.in river lateral bar,14.58~12.5 ka.B.P.river floodplain,12.5~9 ka.B.P.floodplain to lake;and 9 ka.B.P.river lateral bar.Since 60 ka.B.P.,the climate of Taiyuan Basin has been changed from humid to wet warm,and was cold and dry during the last glacial period.Since the Holocene warm period,the climate has global characteristics with regional overprint as revealed by various indicators.The difference in sedimentation rate between basin center and edge was affected by regional tectonic activities to some extents.

关 键 词：太原盆地 河湖相 粒度特征 磁化率 气候环境 

分 类 号：P534.63[天文地球—第四纪地质学]