Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock
文献类型：期刊论文
| 作者 | Kong, Ping; Na, Chunguang; Fink, David; Ding, Lin; Huang, Feixin |
| 刊名 | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| 出版日期 | 2007 |
| 卷号 | 32期号:1页码:116-125 |
| 关键词 | erosion rate cosmogenic nuclide northwest Tibet uplift tectonics |
| ISSN号 | 0197-9337 |
| DOI | 10.1002/esp.1380 |
| 文献子类 | Article |
| 英文摘要 | Concentrations of in-situ-produced cosmogenic nuclides Be-10 and Al-26 in quartz were measured by accelerator mass spectrometry for bedrock basalts and sandstones located in northwest Tibet. The effective exposure ages range between 23 and 134 ka (Be-10) and erosion rates between 4.0 and 24 mm ka(-1). The erosion rates are significantly higher than those in similarly and Antarctica and Australia, ranging between 0.1 and 1 mm ka(-1), suggesting that precipitation is not the major control of erosion of landforms. Comparison of erosion rates in and regions with contrasting tectonic activities suggests that tectonic activity plays a more important role in controlling long-term erosion rates. The obtained erosion rates are, however, significantly lower than the denudation rate of 3000-6000 mm ka(-1) beginning at c. 53 Ma in the nearby Godwin Austen (K2) determined by apatite fission-track thermochronology. It appears that the difference in erosion rates within different time intervals is indicative of increased tectonic activity at c. 5-3 Ma in northwest Tibet. We explain the low erosion rates determined in this study as reflecting reduced tectonic activity in the last million years. A model of localized thinning of the mantle beneath northwest Tibet may account for the sudden increased tectonic activity at c. 5-3 Ma and the later decrease. Copyright (c) 2006 John Wiley & Sons, Ltd. |
| WOS关键词 | GLOBAL CLIMATE-CHANGE ; PRODUCTION-RATES ; SEDIMENT PRODUCTION ; NAMIB DESERT ; ICE-SHEET ; PLATEAU ; UPLIFT ; EVOLUTION ; NUCLIDES ; BASIN |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000243696000009 |
| 出版者 | JOHN WILEY & SONS LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68594]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Kong, Ping |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithosohere Tecton Evolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100029, Peoples R China 3.Australian Nucl Sci & Technol Org, ANSTO Environm, Menai, NSW 2234, Australia |
| 推荐引用方式 GB/T 7714 | Kong, Ping,Na, Chunguang,Fink, David,et al. Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2007,32(1):116-125. |
| APA | Kong, Ping,Na, Chunguang,Fink, David,Ding, Lin,&Huang, Feixin.(2007).Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock.EARTH SURFACE PROCESSES AND LANDFORMS,32(1),116-125. |
| MLA | Kong, Ping,et al."Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock".EARTH SURFACE PROCESSES AND LANDFORMS 32.1(2007):116-125. |
入库方式： OAI收割
来源：地质与地球物理研究所
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