|
|||||
|
|
| 三门峡地区的红粘土磁性地层及环境记录 | |
| 引用本文： | 赵志中,王书兵,蒋复初,吴锡浩,肖华国,田国强,刘科,殷伟德,薛滨,王苏民.三门峡地区的红粘土磁性地层及环境记录[J].海洋地质与第四纪地质,2002,22(3):93-97. |
| 作者姓名： | 赵志中 王书兵 蒋复初 吴锡浩 肖华国 田国强 刘科 殷伟德 薛滨 王苏民 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083;中国地质科学院,地质力学研究所,北京,100081 2. 中国地质科学院,地质力学研究所,北京,100081 3. 中国地质科学院,地质力学研究所,北京,100081;中国科学院,黄土与第四纪地质国家重点实验室,西安,710075 4. 中国科学院,湖泊沉积与环境开放研究实验室,南京,210008 5. 中国科学院,黄土与第四纪地质国家重点实验室,西安,710075;中国科学院,湖泊沉积与环境开放研究实验室,南京,210008 |
| 基金项目： | 国家自然科学基金资助项目 (972 0 60 )，国土资源部重点基础研究项目 (2 0 0 10 2 0 9) |
| 摘 要： | 位于黄土高原东南缘的三门峡红粘土地层，以陕县指望剖面为其典型代表。厚度为74．3m的指望剖面由上部厚34m的黄土地层和下伏厚40.3m的红粘土沉积组成，黄土为L24－L33的连续风尘沉积，下部红粘土为RS1－RS5的沉积。磁性地层研究显示：M／Ga界线位于33.8m处，黄土与红粘土界线之上20cm，Ga/Gi界线位于56.25m处的RS3中下部。该区红粘土近5Ma至2.6Ma的风尘沉积夹河湖相沉积。指望剖面的红粘土地层磁化率较黄土高原内部偏高，总体特征一致，说明近5Ma来东亚季风在区域演化上的一致性。 |
| 关 键 词： | 三门峡地区 红粘土 环境记录 磁性地层 磁化率记录 古环境 风尘沉积 |
| 文章编号： | 0256-1492(2002)03-0093-05 |
| 修稿时间： | 2002年1月28日 |
MAGNETOSTRATIGRAPHY AND ENVIRONMENTAL RECORDS OF LATERITE IN SANMENXIA AREA |
|
| ZHAO Zhi zhong ,WANG Shu bing ,JIANG Fu chu ,WU Xi hao ,XIAO Hua guo ,TIAN Guo qiang ,LIU Ke ,YIN Wei de ,XUE Bin ,WANG Su min.MAGNETOSTRATIGRAPHY AND ENVIRONMENTAL RECORDS OF LATERITE IN SANMENXIA AREA[J].Marine Geology & Quaternary Geology,2002,22(3):93-97. | |
| Authors: | ZHAO Zhi zhong WANG Shu bing JIANG Fu chu WU Xi hao XIAO Hua guo TIAN Guo qiang LIU Ke YIN Wei de XUE Bin WANG Su min |
| Institution: | ZHAO Zhi zhong 1,2,WANG Shu bing 2,JIANG Fu chu 2,3,WU Xi hao 2,3,XIAO Hua guo 2,TIAN Guo qiang 2,LIU Ke 2,YIN Wei de 2,XUE Bin 4,WANG Su min 3,4 |
| Abstract: | The Zhiwang laterite profile in Zhangbian township located at the southeast margin of the Loess Plateau is typical of the Sanmenxia area.In the profile there occurs a laterite sequence from RS 1 to RS 5 (40 3 m thick), overlain by a loess paleosol sequence from L 24 to L 33 (34 m thick). The M/Ga boundary was recorded at the bottom of L 33 near the laterite,and the Ga/Gi boundary at the middle of RS 3 (56 25 m thick).The laterite is eolian deposits from 5 Ma to 2 6 Ma. The magnetic susceptibility of the deposits is higher than any other profiles of red clay,but its main characteristic is similar to others. A high resolution chronostratigraphy of the profile has been established by an age model according to the magnetic susceptibility. Magnetic susceptibility of the Sanmenxia red clay fluctuate periodically from bottom to top,and has 5 susceptibility peaks corresponding to paleosol,whose ages are 5 0,4 0,3 5,2 8, and 2 6 MaBP respectively.After 3 MaBP,susceptibility values increase obviously.There exists a clear correlation among profiles of the laterite in the Loess plateau. |
| Keywords: | magnetostratigraphy magnetic susceptibility records Sanmenxia red clay |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |