Late Quaternary morphotectonic evolution of Upper Indus valley profile: A cosmogenic radionuclide study of river polished surfaces
文献类型：期刊论文
| 作者 | Sharma, KK; Gu, ZY; Lal, D; Caffee, MW; Southon, J |
| 刊名 | CURRENT SCIENCE
 |
| 出版日期 | 1998-08-25 |
| 卷号 | 75期号:4页码:366-371 |
| ISSN号 | 0011-3891 |
| 文献子类 | Article |
| 英文摘要 | We have studied cosmogenic exposure ages in a set of five samples from the river polished surfaces (1-46 m above present river level) of the Indus river (Ladakh), at maximum discharge yield during August. These ages not only provide an opportunity to unravel the complex morphotectonic history of the Upper Indus valley, but also yield estimates of river incision rates during down-cutting of bedrocks. The three lower surfaces, 21 m, 6 m and 1 m above the river level have monotonically decreasing cosmic ray exposure ages of 22, 15 and 3 ka BP, suggesting that the river has been cutting the bedrocks initially (22-15 ka) at high rate of 2 mm yr(-1) which reduced to 0.3-0.4 mm yr(-1) since 15 ka BP, The latter is at par with the reported values of exhumation rate for the Ladakh region. The present data together with similar data from the Indus valley west of Skardu, reported earlier, give a better understanding of the so far poorly understood interplay of regional exhumation, incision rate and the role of climate in the morphotectonic evolution of the Upper Indus valley. |
| WOS关键词 | LADAKH ; HIMALAYA ; PAKISTAN ; UPLIFT ; TIBET ; BE-10 ; AL-26 |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | CURRENT SCIENCE ASSN |
| WOS记录号 | WOS:000076195500017 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75186]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Sharma, KK |
| 作者单位 | 1.Wadia Inst Himalayan Geol, Dehra Dun 248001, Uttar Pradesh, India 2.Chinese Acad Sci, Inst Geol, Beijing, Peoples R China 3.Univ Calif San Diego, Scripps Inst Oceanog, Geosci Res Div, La Jolla, CA 92093 USA 4.Univ Calif Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA |
| 推荐引用方式 GB/T 7714 | Sharma, KK,Gu, ZY,Lal, D,et al. Late Quaternary morphotectonic evolution of Upper Indus valley profile: A cosmogenic radionuclide study of river polished surfaces[J]. CURRENT SCIENCE,1998,75(4):366-371. |
| APA | Sharma, KK,Gu, ZY,Lal, D,Caffee, MW,&Southon, J.(1998).Late Quaternary morphotectonic evolution of Upper Indus valley profile: A cosmogenic radionuclide study of river polished surfaces.CURRENT SCIENCE,75(4),366-371. |
| MLA | Sharma, KK,et al."Late Quaternary morphotectonic evolution of Upper Indus valley profile: A cosmogenic radionuclide study of river polished surfaces".CURRENT SCIENCE 75.4(1998):366-371. |
入库方式： OAI收割
来源：地质与地球物理研究所
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