山旺盆地:记录“深时”气候的时间胶囊  

Shanwang basin: A time capsule recording the “Deep Time” climate

作　　者：余继峰 乔文彦 赵秀丽 蒋宗凯 张典栋 曹慧涛 赵刚 YU Jifeng;QIAO Wenyan;ZHAO Xiuli;JIANG Zongkai;ZHANG Diandong;CAO Huitao;ZHAO Gang(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;Shandong Shanwang National Geopark,Linqu,Shandong 262600,China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]山东山旺国家地质公园,山东临朐262600

出　　处：《山东科技大学学报（自然科学版）》2019年第5期1-8,20,共9页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(41472092)

摘　　要：山旺盆地山旺组硅藻页岩段沉积连续性好,记录着中新世古气候信息,是深时古气候变化研究的理想素材。本研究对该目标层段进行了野外地质剖面实测及物化指标测量,测点间距5 cm。在已有绝对地质年龄框架约束下,运用Laskar北纬65°盛夏的太阳辐射曲线对实测磁化率曲线进行调谐,获得高分辨率达10 kyr的时间标尺。在该时间标尺下,运用实测Rb/Sr值和磁化率等气候替代指标对硅藻页岩段的古气候变化特征进行了分析。认为硅藻页岩段古气候由老到新分为三个演化阶段,在整体温暖潮湿的背景下,也有小尺度冷暖干湿的变化,共识别出十二个气候波动期,分辨率可达千年级别。The diatom shale section of Shanwang Formation in Shanwang basin has stable sedimentary continuity and recording of the Miocene paleoclimatic information is accomplished.This provides ideal material for“Deep-Time”paleoclimatic change research.In this study,the field geological section and the physical and chemical indicators were measured for the target interval.The spacing between measure points was 5 cm.Under the constraints of absolute geological age framework,the measured magnetic susceptibility curve was tuned using the solar insolation curve of the north latitude 65°summer from Laskar to obtain a time scale with a resolution as high as 10 kyr.Under this time scale,the paleoclimate characteristics of the diatom shale section were analyzed using the measured climate proxies such as Rb/Sr value and magnetic susceptibility.It is believed that the paleoclimate of the diatom shale section is divided into three evolution stages from old to new.Under the overall warm and humid background,there are also small-scale changes in temperature,humidity and wetness.A total of 12 climatic fluctuation periods were identified,and the resolution is of up to Millennium level.

关 键 词：山旺盆地 深时 硅藻页岩 时限 古气候特征 

分 类 号：P532[天文地球—古生物学与地层学]