长江三角洲地区第四纪磁性地层学研究  

QUATERNARY MAGNETO-STRATIGRAPHY OF THE YANGTZE DELTA AREA

作　　者：王润华[1] 郭坤一[1] 于振江[1] 张于平[1] 梁小红[1] 

机构地区：[1]南京地质矿产研究所,江苏南京210016

出　　处：《地层学杂志》2005年第B11期612-617,共6页Journal of Stratigraphy

基　　金：中国地质调查局"长江三角洲地区地下水资源与地质灾害调查评价"项目成果之一。

摘　　要：根据长江三角洲地区18个新老钻孔的古地磁、磁化率、天然剩余磁化强度等磁性特征的综合研究,证明布容正向极性带、松山反向极性带与高斯正向极性带,以及哥德堡、布莱克、贾拉米洛、奥尔杜维极性亚带在本区都存在;结合岩石地层、生物地层和测年数据等资料,与微古、孢粉等分析结果都有一定的吻合性;这对第四纪地层的划分具有重要的参考价值。同时认为,第四纪时长江三角洲地区继接受碎屑沉积物以来,基本表现为一连续沉积区,并无长时间的大规模沉积间断。The comprehensive studies of the paleomagnetism, magnetical susceptibility, and intensity of the spontaneous magnetization from the 18 new and old boreholes of the Yangtze Delta Area prove that the Brunhes Normal Polarity Zone, Matsuyame Reserved Polarity, and Gauss Normal Polarity Zone as well as Gutenberg, Blake, Jaramillo, and Olduval Polarity Subzones are all present in this area and the lithostratigraphical, biostratigraphical, and dating data are in certain agreement with the result of micropaleontological and polynological analyses, being of important reference value in the Quaternary stratigraphic division. If is regarded in the same time that since the Yangtze Delta Area during the Quaternary age accepted the elastic sediments it has been generally a continues sedimentary province, without long-term large-scale sedimentary breaks.

关 键 词：磁性地层 第四纪 长江三角洲 江苏 浙江 上海 

分 类 号：P534.62[天文地球—古生物学与地层学]