| 练江平原第四系的时代 |
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| 引用本文： | 宋毅盛,陈文彬,潘华,张志中,何振勤,程小久,曾强,佘奕平,张俊杰.练江平原第四系的时代[J].吉林大学学报(地球科学版),2012(Z1):154-161. |
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| 作者姓名： | 宋毅盛 陈文彬 潘华 张志中 何振勤 程小久 曾强 佘奕平 张俊杰 |
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| 作者单位： | 中国地震局地球物理研究所;广东省电力设计研究院;广东省揭阳市地震局 |
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| 基金项目： | 科技部科技支撑项目(2006BAC13B01-06);中国地震局地球物理研究所基本科研业务费专项(DQJB07B11) |
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| 摘 要： | 基于钻孔柱状图将练江平原区第四系划分为9个基本层,通过对WYZK-06孔岩心的系统测年,标定了第四系的年代。第四系底部地层时代为中更新世,厚度约40 m,为陆相沉积。中更新统底部地质年龄为(325±32)ka,属中更新世中晚期;顶部为一套厚达10 cm左右的稳定花斑黏土层。上覆地层为上更新统,反映中更新世与晚更新世之间有较长时间的沉积间断。中更新统分布局限于普宁—两英之间,上更新统和全新统占据平原的大部分地区,表明练江平原是在中更新世发生局部断陷,在晚更新世以来开始接受大面积沉积。
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| 关 键 词： | 练江平原 第四系 地层时代 中更新世 沉积 |
Geological Age of Quaternary Series in Lianjiang Plain |
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| Song Yi-sheng,Chen Wen-bin,Pan Hua,Zhang Zhi-zhong,He Zhen-qin,Cheng Xiao-jiu,Zeng Qiang,She Yi-ping,Zhang Jun-jie.Geological Age of Quaternary Series in Lianjiang Plain[J].Journal of Jilin Unviersity:Earth Science Edition,2012(Z1):154-161. |
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| Authors: | Song Yi-sheng Chen Wen-bin Pan Hua Zhang Zhi-zhong He Zhen-qin Cheng Xiao-jiu Zeng Qiang She Yi-ping Zhang Jun-jie |
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| Institution: | 1.Institute of Geophysics,China Earthquake Administration,Beijing 100081,China 2.Guangdong Electric Power Design Institute,Guangzhou 510000,China 3.Jieyang Bureau of Earthquake,Jieyang 522000,Guangdong,China |
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| Abstract: | Nine basic layers was divided based on the drill histogram,and the period of Quaternary was calibrated by the rock core of WYZK-06 drill.The age of bottom of the Quaternary was middle Pleistocene,with the thickness of about 40 m of continental sedimentary.The geological age of the under part of the basin is(325±32) ka B.P.,belonging to Medio-Pleistocene.The top part of Medio-Pleistocene series is 10 cm’s stable mottle clay,which reflects there was a long sedimentary interruption between Medio-Pleistocene and Epipleistocene.Medio-Pleistocene series only distributes along Puning-Liangying and larger part of the basin is occupied by Epipleistocene series and Holocene series,which shows that partly fault-depression starts in Medio-Pleistocene and sediments develop in large scale since Epipleistocene. |
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| Keywords: | Lianjiang basin Quaternary geologicl age Medio-Pleistocene sedimentation |
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