摘要
通过庐山科学考察(1997—2009)对大校场沟口晚第四纪剖面地层进行精细研究,采用古地磁、电子自旋共振(ESR)、36Cl、释光法等多种仪器测年方法的分析,建立了完整剖面的全时段地层的自400 ka.B.P.以来的系列年龄数据,与之相对应识别出Biwa-III(320 ka.B.P.)事件、Biwa-II(260 ka.B.P.)事件、Biwa-I(180 ka.B.P.)事件(因铁盘扰动影响缺失)、Blake(100 ka.B.P.)事件、Laschamp(20 ka.B.P.)事件(因表层活动影响未发育)等古地磁极性事件,结合层序地层和层型特征及沉积环境将剖面地层由早至晚划分为4个发展旋回阶段:I阶段为冰期(400～200 ka.B.P.)气候时期,II阶段为间冰期(200～100 ka.B.P.)气候时期,III阶段为冰缘期(100～10 ka.B.P.)气候时期,IV阶段为冰后期(10～0 ka.B.P.)气候时期。
On the distance science review of the Lushan region,the particular researched for the geologic stratum section of Late Quaternary Period in the Lushan Dajiaochang area.This introduced for with the ancient terrestrial magnetism,and electronics spin resonance（ESR） and 36Cl,and luminescence dating etc.of various instrument of the dating method are analysis,they constituted the whole geologic strata of the complete section from the series age data that since 400 Ka.B.P.,there be opposite to with it identified out the Biwa-III（320 Ka.B.P.） event,and the Biwa-II（260 Ka.B.P.） event,and the Biwa-I（180 Ka.B.P.） event（the molest influence of the iron dish is scarcity）,and the Blake（100 Ka.B.P.） event,and the Laschamp（20 Ka.B.P.） event（the activity influence of the surface layer is not growth） etc.of events of ancient terrestrial magnetism.That also combined the layer sequence geologic strata and the layer type characteristics and sink to accumulate the sediment environment,by early to night for thedivided to 4 developmentic gyrational stages the section geologic strata： the I stage is climate period of the glacial epoch（400～200 Ka.B.P.）,the II stage is climate period of the interglacial epoch（200～100 Ka.B.P.）,the III stage is climate period of the glacial marginal epoch（100～10 Ka.B.P.）,the IV stage is climate period of the post-glacial epoch（10～0 Ka.B.P.）.
出处
《中国工程科学》
北大核心
2012年第11期36-43,48,共9页
Strategic Study of CAE
基金
中国科学院地球环境研究所黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG0701)
湖南省重点学科建设项目(ZRDL0701)
西北大学大陆动力学国家重点实验室开放基金项目(DL2006001)
关键词
晚第四纪沉积
多种器测定年数据
层型序列及综合年龄
沉积旋回阶段
庐山大校场
sediment of late quaternary period
various dating data
layer type sequence and synthesis age
gyrational stages of sediments
Dajiaochang area of Lushan in China
