Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock.
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...
Published in: | Earth Surface Processes and Landforms |
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2007
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Online Access: | http://apo.ansto.gov.au/dspace/handle/10238/1916 https://doi.org/10.1002/esp.1380 |
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ftansto:oai:apo-prod.ansto.gov.au:10238/1916 2023-05-15T13:36:16+02:00 Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. Kong, P Na, CG Fink, D Ding, L Huang, FX 2007-01 http://apo.ansto.gov.au/dspace/handle/10238/1916 https://doi.org/10.1002/esp.1380 en eng John Wiley & Sons Kong, P., Na, C. G., Fink, D., Ding, L., & Huang, F. X. (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. doi:10.1002/esp.1380 0197-9337 http://dx.doi.org/10.1002/esp.1380 http://apo.ansto.gov.au/dspace/handle/10238/1916 Erosion Tibet Beryllium Aluminium Tectonics In-Situ Processing Journal Article 2007 ftansto https://doi.org/10.1002/esp.1380 2020-04-27T22:28:36Z 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. © 2006, John Wiley & Sons Ltd. Article in Journal/Newspaper Antarc* Antarctica Australian Nuclear Science and Technology Organisation: ANSTO Publications Online Earth Surface Processes and Landforms 32 1 116 125 |
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Open Polar |
collection |
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online |
op_collection_id |
ftansto |
language |
English |
topic |
Erosion Tibet Beryllium Aluminium Tectonics In-Situ Processing |
spellingShingle |
Erosion Tibet Beryllium Aluminium Tectonics In-Situ Processing Kong, P Na, CG Fink, D Ding, L Huang, FX Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
topic_facet |
Erosion Tibet Beryllium Aluminium Tectonics In-Situ Processing |
description |
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. © 2006, John Wiley & Sons Ltd. |
format |
Article in Journal/Newspaper |
author |
Kong, P Na, CG Fink, D Ding, L Huang, FX |
author_facet |
Kong, P Na, CG Fink, D Ding, L Huang, FX |
author_sort |
Kong, P |
title |
Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
title_short |
Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
title_full |
Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
title_fullStr |
Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
title_full_unstemmed |
Erosion in northwest Tibet from in-situ-produced cosmogenic Be-10 and Al-26 in bedrock. |
title_sort |
erosion in northwest tibet from in-situ-produced cosmogenic be-10 and al-26 in bedrock. |
publisher |
John Wiley & Sons |
publishDate |
2007 |
url |
http://apo.ansto.gov.au/dspace/handle/10238/1916 https://doi.org/10.1002/esp.1380 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Kong, P., Na, C. G., Fink, D., Ding, L., & Huang, F. X. (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. doi:10.1002/esp.1380 0197-9337 http://dx.doi.org/10.1002/esp.1380 http://apo.ansto.gov.au/dspace/handle/10238/1916 |
op_doi |
https://doi.org/10.1002/esp.1380 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
32 |
container_issue |
1 |
container_start_page |
116 |
op_container_end_page |
125 |
_version_ |
1766076206292140032 |