Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion
The Bayan Har Shan, a prominent upland area in the northeastern sector of the Tibetan Plateau, hosts an extensive glacial geological record. To reconstruct its palaeoglaciology we have determined Be-10 exposure ages based on 67 samples from boulders, surface pebbles, and sediment sections in conjunc...
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Online Access: | https://hdl.handle.net/20.500.11897/238905 https://doi.org/10.1016/j.quascirev.2011.05.002 |
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ftpekinguniv:oai:localhost:20.500.11897/238905 2023-05-15T16:13:05+02:00 Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion Heyman, Jakob Stroeven, Arjen P. Caffee, Marc W. Hattestrand, Clas Harbor, Jonathan M. Li, Yingkui Alexanderson, Helena Zhou, Liping Hubbard, Alun Heyman, J (reprint author), Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden. Purdue Univ, Dept Phys, Purdue Rare Isotope Measurement Lab, W Lafayette, IN 47907 USA. Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA. Lund Univ, Dept Earth & Ecosyst Sci, S-22362 Lund, Sweden. Peking Univ, Dept Geog, Beijing 100871, Peoples R China. Aberystwyth Univ, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales. 2011 https://hdl.handle.net/20.500.11897/238905 https://doi.org/10.1016/j.quascirev.2011.05.002 en eng quaternary science reviews QUATERNARY SCIENCE REVIEWS.2011,30,(15-16),1988-2001. 902754 0277-3791 http://hdl.handle.net/20.500.11897/238905 doi:10.1016/j.quascirev.2011.05.002 WOS:000293436700016 SCI EI Tibetan plateau Palaeoglaciology Bayan Har Exposure dating LATE QUATERNARY GLACIATION RELICT LATERAL MORAINES FENNOSCANDIAN ICE-SHEET LANDSCAPE EVOLUTION COSMOGENIC BE-10 PRODUCTION-RATES MOUNT EVEREST GLACIER FLOW HALF-LIFE CLIMATE Journal 2011 ftpekinguniv https://doi.org/20.500.11897/238905 https://doi.org/10.1016/j.quascirev.2011.05.002 2021-08-01T08:48:28Z The Bayan Har Shan, a prominent upland area in the northeastern sector of the Tibetan Plateau, hosts an extensive glacial geological record. To reconstruct its palaeoglaciology we have determined Be-10 exposure ages based on 67 samples from boulders, surface pebbles, and sediment sections in conjunction with studies of the glacial geology (remote sensing and field studies) and numerical glacier modelling. Exposure ages from moraines and glacial sediments in Bayan Har Shan range from 3 ka to 129 ka, with a large disparity in exposure ages for individual sites and within the recognised four morphostratigraphical groups. The exposure age disparity cannot be explained by differences in inheritance without using unrealistic assumptions but it can be explained by differences in post-depositional shielding which produces exposure ages younger than the deglaciation age. We present a palaeoglaciological time-slice reconstruction in which the most restricted glaciation, with glaciers less than 10 km long, occurred before 40-65 ka. More extensive glaciations occurred before 60-100 ka and 95-165 ka. Maximum glaciation is poorly constrained but probably even older. The Bayan Hat Shan exposure age dataset indicates that glaciers on the northeastern Tibetan Plateau have remained surprisingly restricted for at least 40 ka, including the global last glacial maximum (LGM). This case of a missing LGM is further supported by high-resolution glacier modelling experiments. (C) 2011 Elsevier Ltd. All rights reserved. Geography, Physical Geosciences, Multidisciplinary SCI(E) EI 21 ARTICLE 15-16 1988-2001 30 Journal/Newspaper Fennoscandian Ice Sheet Peking University Institutional Repository (PKU IR) Quaternary Science Reviews 30 15-16 1988 2001 |
institution |
Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
Tibetan plateau Palaeoglaciology Bayan Har Exposure dating LATE QUATERNARY GLACIATION RELICT LATERAL MORAINES FENNOSCANDIAN ICE-SHEET LANDSCAPE EVOLUTION COSMOGENIC BE-10 PRODUCTION-RATES MOUNT EVEREST GLACIER FLOW HALF-LIFE CLIMATE |
spellingShingle |
Tibetan plateau Palaeoglaciology Bayan Har Exposure dating LATE QUATERNARY GLACIATION RELICT LATERAL MORAINES FENNOSCANDIAN ICE-SHEET LANDSCAPE EVOLUTION COSMOGENIC BE-10 PRODUCTION-RATES MOUNT EVEREST GLACIER FLOW HALF-LIFE CLIMATE Heyman, Jakob Stroeven, Arjen P. Caffee, Marc W. Hattestrand, Clas Harbor, Jonathan M. Li, Yingkui Alexanderson, Helena Zhou, Liping Hubbard, Alun Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
topic_facet |
Tibetan plateau Palaeoglaciology Bayan Har Exposure dating LATE QUATERNARY GLACIATION RELICT LATERAL MORAINES FENNOSCANDIAN ICE-SHEET LANDSCAPE EVOLUTION COSMOGENIC BE-10 PRODUCTION-RATES MOUNT EVEREST GLACIER FLOW HALF-LIFE CLIMATE |
description |
The Bayan Har Shan, a prominent upland area in the northeastern sector of the Tibetan Plateau, hosts an extensive glacial geological record. To reconstruct its palaeoglaciology we have determined Be-10 exposure ages based on 67 samples from boulders, surface pebbles, and sediment sections in conjunction with studies of the glacial geology (remote sensing and field studies) and numerical glacier modelling. Exposure ages from moraines and glacial sediments in Bayan Har Shan range from 3 ka to 129 ka, with a large disparity in exposure ages for individual sites and within the recognised four morphostratigraphical groups. The exposure age disparity cannot be explained by differences in inheritance without using unrealistic assumptions but it can be explained by differences in post-depositional shielding which produces exposure ages younger than the deglaciation age. We present a palaeoglaciological time-slice reconstruction in which the most restricted glaciation, with glaciers less than 10 km long, occurred before 40-65 ka. More extensive glaciations occurred before 60-100 ka and 95-165 ka. Maximum glaciation is poorly constrained but probably even older. The Bayan Hat Shan exposure age dataset indicates that glaciers on the northeastern Tibetan Plateau have remained surprisingly restricted for at least 40 ka, including the global last glacial maximum (LGM). This case of a missing LGM is further supported by high-resolution glacier modelling experiments. (C) 2011 Elsevier Ltd. All rights reserved. Geography, Physical Geosciences, Multidisciplinary SCI(E) EI 21 ARTICLE 15-16 1988-2001 30 |
author2 |
Heyman, J (reprint author), Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden. Purdue Univ, Dept Phys, Purdue Rare Isotope Measurement Lab, W Lafayette, IN 47907 USA. Univ Tennessee, Dept Geog, Knoxville, TN 37996 USA. Lund Univ, Dept Earth & Ecosyst Sci, S-22362 Lund, Sweden. Peking Univ, Dept Geog, Beijing 100871, Peoples R China. Aberystwyth Univ, Inst Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales. |
format |
Journal/Newspaper |
author |
Heyman, Jakob Stroeven, Arjen P. Caffee, Marc W. Hattestrand, Clas Harbor, Jonathan M. Li, Yingkui Alexanderson, Helena Zhou, Liping Hubbard, Alun |
author_facet |
Heyman, Jakob Stroeven, Arjen P. Caffee, Marc W. Hattestrand, Clas Harbor, Jonathan M. Li, Yingkui Alexanderson, Helena Zhou, Liping Hubbard, Alun |
author_sort |
Heyman, Jakob |
title |
Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
title_short |
Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
title_full |
Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
title_fullStr |
Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
title_full_unstemmed |
Palaeoglaciology of Bayan Har Shan, NE Tibetan Plateau: exposure ages reveal a missing LGM expansion |
title_sort |
palaeoglaciology of bayan har shan, ne tibetan plateau: exposure ages reveal a missing lgm expansion |
publisher |
quaternary science reviews |
publishDate |
2011 |
url |
https://hdl.handle.net/20.500.11897/238905 https://doi.org/10.1016/j.quascirev.2011.05.002 |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_source |
SCI EI |
op_relation |
QUATERNARY SCIENCE REVIEWS.2011,30,(15-16),1988-2001. 902754 0277-3791 http://hdl.handle.net/20.500.11897/238905 doi:10.1016/j.quascirev.2011.05.002 WOS:000293436700016 |
op_doi |
https://doi.org/20.500.11897/238905 https://doi.org/10.1016/j.quascirev.2011.05.002 |
container_title |
Quaternary Science Reviews |
container_volume |
30 |
container_issue |
15-16 |
container_start_page |
1988 |
op_container_end_page |
2001 |
_version_ |
1765998692252254208 |