| 黄土中古土壤淀积类型 |
| |
| 引用本文： | 赵景波.黄土中古土壤淀积类型[J].地理学报,1995,50(1):25-40. |
| |
| 作者姓名： | 赵景波 |
| |
| 作者单位： | 西安地质学院 |
| |
| 基金项目： | 中国科学院西安黄土与第四纪地质国家重点实验室资助 |
| |
| 摘 要： | 作者在西安附近发现了第１、４层古土壤的双层淀积和第５、８层古土壤多层淀积现象。资料表明，双层淀积、多层淀积和厚度异常大的ＣａＣＯ３淀积层是土壤具多元发生过程或受后期淋溶的产物，它们常代表两个或两个以上的成壤期。第１层古土壤下部的两层结构均不属古土壤组合部分，该层土壤为中、酸性森林土壤。第８层古土壤特殊的厚层淀积代表了气候的多次变化和多个成壤期。第４、５层古土壤具不连续ＣａＣＯ３和Ｆｅ２Ｏ３、Ａｌ２
|
| 关 键 词： | 古土壤 类型 沉积层 黄土 |
A STUDY ON THE TYPES OF ILLUVIAL HORIZONS OF THE PALEOSOLS IN THE LOESS AREA |
| |
| Zhao Jingbo.A STUDY ON THE TYPES OF ILLUVIAL HORIZONS OF THE PALEOSOLS IN THE LOESS AREA[J].Acta Geographica Sinica,1995,50(1):25-40. |
| |
| Authors: | Zhao Jingbo |
| |
| Institution: | Xi' an College of Geology. Xi' an 710054 |
| |
| Abstract: | On the basis of investigation, double layer illuvial horizon under 1st and 4th paleosol layers and multi-layer illuvial horizons under 5th and 8th paleosol layers, which were not previously discovered, have been discovered. The materials obtained show that double layer illuvial horizons and multi-layer illuvial horizons as well as much thick illuvial horizons of CaCO_3 were formed in the repeated soil-forming processes or by the leaching after the formation of soils. There is a difference in the shape, distribution, texture and composition between contemporaneous concretions and deuterogenic concretions. The double illuvial horizons of CaCO_3 under 1st paleosol do not belong to constitution part, the paleosol was neutral or acid forest soil not having illuvial horizon of CaCO_3 in the soil profile. The thick illuvial horizon in the 8th paleosol layer indicates the repeated soil-forming processes and climate changes. In the illuvial horizons of discontinuous CaCO_3 concretion, Al_2O_3 and Fe_2O_3ocour under the 4th and 5th paleosol layers, and the two paleosols are the acid soils developed under the forests. |
| |
| Keywords: | Types of paleosols Illuvial horizons Loess |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地理学报》浏览原始摘要信息 |
| 点击此处可从《地理学报》下载免费的PDF全文 |
