Origin of red color of the Lower Siwalik palaeosols: A micromorphological approach
文献类型：期刊论文
| 作者 | Singh, Seema ; Parkash, B. ; Awasthi, Arun K. |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2009-06 |
| 卷号 | 6期号:2页码:147–154 |
| 关键词 | Palaeosols C(3) type vegetation diagenetic red beds calcite spars |
| ISSN号 | 1672-6316 |
| 通讯作者 | Singh, S |
| 英文摘要 | Palaeosols of the Siwalik Group are associated with fluvial and lacustrine deposits that occur as thick multiple pedocomplexes. The bright red color of the palaeosol beds has been earlier interpreted as a result of hot and arid palaeoclimate. However, as against this view, our investigations of the bright red palaeosol beds of the Lower Siwaliks suggest that the climate was cool and subhumid, instead of hot and arid during the deposition of these beds. Since cold climate is not very conducive to impart red coloration, further research is needed to explain the cause of these red beds. For this, the micromorphological study of soil thin sections was done which showed the presence of features such as dissolution and recrystallisation of quartz, feldspar and mica, compaction, slickensides, presence of calcite spars, subrounded and cracked nature of quartz grains, microfabric, complex patterns of birefringence fabrics, pigmentary ferric oxides, thick cutans and cementation by calcite. These features indicate that diagenesis took place on a large scale in these sediments. The positive Eh and neutral-alkaline pH of soils also suggest that the conditions were favorable for the formation of diagenetic red beds. During burial diagenesis of sediments, the hydroxides of ferromagnesian minerals got converted into ferric oxide minerals (hematite). During deep burial diagenesis smectite was converted into illite and the preponderance of illite over smectite with increasing depth of burial also indicates the diagenesis of sediments. Thus, the red color of the Lower Siwalik palaeosols seems to be due mainly to the burial diagenesis of sediments and does not appear to be due to the then prevailing climatic condition. |
| 语种 | 英语 |
| 公开日期 | 2013-08-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6016]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2009_Vol6 No.2 |
| 推荐引用方式 GB/T 7714 | Singh, Seema,Parkash, B.,Awasthi, Arun K.. Origin of red color of the Lower Siwalik palaeosols: A micromorphological approach[J]. JOURNAL OF MOUNTAIN SCIENCE,2009,6(2):147–154. |
| APA | Singh, Seema,Parkash, B.,&Awasthi, Arun K..(2009).Origin of red color of the Lower Siwalik palaeosols: A micromorphological approach.JOURNAL OF MOUNTAIN SCIENCE,6(2),147–154. |
| MLA | Singh, Seema,et al."Origin of red color of the Lower Siwalik palaeosols: A micromorphological approach".JOURNAL OF MOUNTAIN SCIENCE 6.2(2009):147–154. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。