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| 沉积物放射性元素含量对粒度及气候变化的响应——以福州盆地SZK1、SZK2钻孔地层为例 | |
| 引用本文： | 郑荣章,徐锡伟,朱金芳,黄宗林,李建平,计凤桔.沉积物放射性元素含量对粒度及气候变化的响应——以福州盆地SZK1、SZK2钻孔地层为例[J].地震地质,2005,27(4):567-577. |
| 作者姓名： | 郑荣章 徐锡伟 朱金芳 黄宗林 李建平 计凤桔 |
| 作者单位： | 1. 中国地震局地质研究所,地震动力学国家重点实验室,北京,100029 2. 中国地震局地质研究所,中国地震局活动构造探测研究中心,北京,100029 3. 福建省地震局,福州,350013 |
| 基金项目： | 国家发展和改革委员会资助项目 |
| 摘 要： | 根据福州盆地2个钻孔地层放射性元素(铀、钍、钾)含量的变化特点,结合孢粉分析等结果,探讨了地层放射性元素含量变化与岩性、沉积环境的关系。沉积地层中的放射性元素含量与沉积物粒度、岩性等密切相关,在泥质沉积(如淤泥、黏土)中含量较高,在砂质沉积中较低,在砾石层中介于前两者之间。同时,放射性元素含量的高低还与古气候环境有关,温暖潮湿的环境放射性元素含量较高,凉爽干燥的环境含量较低 |
| 关 键 词： | U-Th-K放射性元素 粒度 古环境 钻孔 福州盆地 |
| 文章编号： | 0253-4967（2005）04-0567-11 |
| 收稿时间： | 2005-08-25 |
| 修稿时间： | 2005-12-12 |
RESEARCH ON EFFECTS OF CONTENTS OF RADIOACTIVE ELEMENTS ON GRANULARITY AND CLIMATE CHANGE--AN EXAMPLE OF SZK1 AND SZK2 DRILL HOLES STRATA IN FUZHOU BASIN |
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| ZHENG Rong-zhang,XU Xi-wei,ZHU Jin-fang,HUANG Zong-lin,LI Jian-ping,JI Feng-ju.RESEARCH ON EFFECTS OF CONTENTS OF RADIOACTIVE ELEMENTS ON GRANULARITY AND CLIMATE CHANGE--AN EXAMPLE OF SZK1 AND SZK2 DRILL HOLES STRATA IN FUZHOU BASIN[J].Seismology and Geology,2005,27(4):567-577. | |
| Authors: | ZHENG Rong-zhang XU Xi-wei ZHU Jin-fang HUANG Zong-lin LI Jian-ping JI Feng-ju |
| Institution: | 1 State Key Laboratory of Earthquake dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China ;2 Center for Active Tectonic Studies, institute of Geology, China Earthquake Administration, Beijing 100029, China ;3 Earthquake Administration of Fujian Province, Fuzhou 350013, China |
| Abstract: | As a fault depression basin developed in the middle and late Quaternary, the Fuzhou basin consists of complicated deposit structures, including deposits of marine facies, terrestrial facies and marine and terrestrial alternating facies. The thick source alpha counter and flame-photometer are used to measure the content of radioactive elements (uranium, thorium and Potassium) of two drill holes (SZK1 and SZK2) strata in Fuzhou basin. Comparison of the content of radioactive elements with the result of spore-pollen analysis of one drill hole (SZK1) strata shows that the former changes with the variations of lithology and depositional environment. The content of radioactive elements in sediment is related to the scale of sediment granularity and lithology, being high in argillaceous sediments (e.g. silt and clay), low in sandy sediments and median in gravel strata. On the other hand, the contents of radioactive elements are relative to paleoenvironment, the warm and humid environment is propitious for high concentration of radioactive elements; while cool and dry climate is just the opposite. |
| Keywords: | U-Th-K radioactive elements content granularity paleoenvironment drill hole strata Fuzhou basin |
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