doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene
Abstract. The Lena River delta, the largest delta of the Arc-tic Ocean, differs from other deltas because it consists mainly of organomineral sediments, commonly called peat, that con-tain a huge organic carbon reservoir. The analysis of delta sediment radiocarbon ages showed that they could not hav...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.689.747 2023-05-15T17:07:15+02:00 doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene D. Bolshiyanov A. Makarov L. Savelieva The Pennsylvania State University CiteSeerX Archives 2014 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.747 http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.747 http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf text 2014 ftciteseerx 2016-01-08T18:18:03Z Abstract. The Lena River delta, the largest delta of the Arc-tic Ocean, differs from other deltas because it consists mainly of organomineral sediments, commonly called peat, that con-tain a huge organic carbon reservoir. The analysis of delta sediment radiocarbon ages showed that they could not have formed as peat during floodplain bogging; rather, they accu-mulated when Laptev Sea water level was high and green mosses and sedges grew and were deposited on the surface of flooded marshes. The Lena River delta formed as organomineral masses and layered sediments accumulated during transgressive phases when sea level rose. In regressive phases, the islands com-posed of these sediments and other, more ancient islands were eroded. Each new sea transgression led to further ac-cumulation of layered sediments. As a result of alternating transgressive and regressive phases, the first alluvial-marine terrace formed, consisting of geological bodies of different ages. Determining the formation age of different areas of the first terrace and other marine terraces on the coast al-lowed the periods of increasing (8000–6000 BP (years before present), 4500–4000, 2500–1500, and 400–200 BP) and de-creasing (5000, 3000, and 500 BP) Laptev Sea levels to be distinguished in the Lena Delta area. Text laptev Laptev Sea lena delta lena river Unknown Laptev Sea |
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ftciteseerx |
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English |
description |
Abstract. The Lena River delta, the largest delta of the Arc-tic Ocean, differs from other deltas because it consists mainly of organomineral sediments, commonly called peat, that con-tain a huge organic carbon reservoir. The analysis of delta sediment radiocarbon ages showed that they could not have formed as peat during floodplain bogging; rather, they accu-mulated when Laptev Sea water level was high and green mosses and sedges grew and were deposited on the surface of flooded marshes. The Lena River delta formed as organomineral masses and layered sediments accumulated during transgressive phases when sea level rose. In regressive phases, the islands com-posed of these sediments and other, more ancient islands were eroded. Each new sea transgression led to further ac-cumulation of layered sediments. As a result of alternating transgressive and regressive phases, the first alluvial-marine terrace formed, consisting of geological bodies of different ages. Determining the formation age of different areas of the first terrace and other marine terraces on the coast al-lowed the periods of increasing (8000–6000 BP (years before present), 4500–4000, 2500–1500, and 400–200 BP) and de-creasing (5000, 3000, and 500 BP) Laptev Sea levels to be distinguished in the Lena Delta area. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
D. Bolshiyanov A. Makarov L. Savelieva |
spellingShingle |
D. Bolshiyanov A. Makarov L. Savelieva doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
author_facet |
D. Bolshiyanov A. Makarov L. Savelieva |
author_sort |
D. Bolshiyanov |
title |
doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
title_short |
doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
title_full |
doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
title_fullStr |
doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
title_full_unstemmed |
doi:10.5194/bg-12-579-2015 © Author(s) 2015. CC Attribution 3.0 License. Lena River delta formation during the Holocene |
title_sort |
doi:10.5194/bg-12-579-2015 © author(s) 2015. cc attribution 3.0 license. lena river delta formation during the holocene |
publishDate |
2014 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.747 http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf |
geographic |
Laptev Sea |
geographic_facet |
Laptev Sea |
genre |
laptev Laptev Sea lena delta lena river |
genre_facet |
laptev Laptev Sea lena delta lena river |
op_source |
http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.689.747 http://www.biogeosciences.net/12/579/2015/bg-12-579-2015.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766062595811311616 |