Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China
International audience Rhizoliths found in bed of the late Quaternary paleolake Zhuyezhe, Minqin Basin, central Tengeri Desert, NW China were studied. Vegetation coverage is present at some locations in the paleolake area although, much of the bed area is covered with moving dunes. Rhizoliths are oc...
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Online Access: | https://hal.science/hal-02092664 https://doi.org/10.1016/j.quaint.2018.06.046 |
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ftuniparissaclay:oai:HAL:hal-02092664v1 2024-06-16T07:39:22+00:00 Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China Sun, Qingfeng Xue, Wenhui Zamanian, Kazem Colin, Christophe Duchamp-Alphonse, Stéphanie Pei, Wentao Faculty of Geography, Northwest Normal University, Lanzhou, 730070, China Georg-August-University = Georg-August-Universität Göttingen Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) 2019-01 https://hal.science/hal-02092664 https://doi.org/10.1016/j.quaint.2018.06.046 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2018.06.046 hal-02092664 https://hal.science/hal-02092664 doi:10.1016/j.quaint.2018.06.046 ISSN: 1040-6182 Quaternary International https://hal.science/hal-02092664 Quaternary International, 2019, 502, pp.246-257. ⟨10.1016/j.quaint.2018.06.046⟩ [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2019 ftuniparissaclay https://doi.org/10.1016/j.quaint.2018.06.046 2024-05-17T00:09:53Z International audience Rhizoliths found in bed of the late Quaternary paleolake Zhuyezhe, Minqin Basin, central Tengeri Desert, NW China were studied. Vegetation coverage is present at some locations in the paleolake area although, much of the bed area is covered with moving dunes. Rhizoliths are occasionally eroded out and exposed to the air. The morphology of the rhizoliths resembles singular or branching carbonated tubules which are hollow in their central part. The rhizoliths are black to grey, and are broken and scattered randomly on the sand surface of the lake bed. The lacustrine deposits are black greenish silt or silty clay with a large quantity of white petite lake snail shells. The possible plant types, sources and formation conditions of carbon dioxide and calcium, the sedimentary and diagenetic environments, and the process of rhizolith formation were discussed via examining rhizoliths macromorphology, studying the micromorphology and mineralogy by microscopy, cathodoluminescence and scanning electron microscope, and studying the chemical compositions of cementing minerals and fragments by energy dispersive X-ray spectra. The original roots of the rhizoliths belong to hydrophytes, such as Typha latifolia, Scirpus maritimus and Carex stenophylla. Lake snails and previous pollen data indicate that the rhizoliths formed in a sedimentary environment of shallow fresh water lake like marginal or palustrine areas during the Holocene. Shallow lake water disturbance by desert wind above the loose sandy sediment or soil was favoring the rhizoliths formation. A continuous supply of oxygen through water disturbance led to complete oxidation of roots and producing carbon dioxide. Dissolution of CO2 in water and so, carbonic acid production resulted in minerals weathering such as feldspar and primary carbonate particles and the release of K+ and Ca2+ ions. At presence of CO2 and Ca2+ saturated in the pore water around the roots of hydrophytes within the sediments or soil, carbonate precipitation occurred around ... Article in Journal/Newspaper Carbonic acid Archives ouvertes de Paris-Saclay Quaternary International 502 246 257 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Sun, Qingfeng Xue, Wenhui Zamanian, Kazem Colin, Christophe Duchamp-Alphonse, Stéphanie Pei, Wentao Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Rhizoliths found in bed of the late Quaternary paleolake Zhuyezhe, Minqin Basin, central Tengeri Desert, NW China were studied. Vegetation coverage is present at some locations in the paleolake area although, much of the bed area is covered with moving dunes. Rhizoliths are occasionally eroded out and exposed to the air. The morphology of the rhizoliths resembles singular or branching carbonated tubules which are hollow in their central part. The rhizoliths are black to grey, and are broken and scattered randomly on the sand surface of the lake bed. The lacustrine deposits are black greenish silt or silty clay with a large quantity of white petite lake snail shells. The possible plant types, sources and formation conditions of carbon dioxide and calcium, the sedimentary and diagenetic environments, and the process of rhizolith formation were discussed via examining rhizoliths macromorphology, studying the micromorphology and mineralogy by microscopy, cathodoluminescence and scanning electron microscope, and studying the chemical compositions of cementing minerals and fragments by energy dispersive X-ray spectra. The original roots of the rhizoliths belong to hydrophytes, such as Typha latifolia, Scirpus maritimus and Carex stenophylla. Lake snails and previous pollen data indicate that the rhizoliths formed in a sedimentary environment of shallow fresh water lake like marginal or palustrine areas during the Holocene. Shallow lake water disturbance by desert wind above the loose sandy sediment or soil was favoring the rhizoliths formation. A continuous supply of oxygen through water disturbance led to complete oxidation of roots and producing carbon dioxide. Dissolution of CO2 in water and so, carbonic acid production resulted in minerals weathering such as feldspar and primary carbonate particles and the release of K+ and Ca2+ ions. At presence of CO2 and Ca2+ saturated in the pore water around the roots of hydrophytes within the sediments or soil, carbonate precipitation occurred around ... |
author2 |
Faculty of Geography, Northwest Normal University, Lanzhou, 730070, China Georg-August-University = Georg-August-Universität Göttingen Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Sun, Qingfeng Xue, Wenhui Zamanian, Kazem Colin, Christophe Duchamp-Alphonse, Stéphanie Pei, Wentao |
author_facet |
Sun, Qingfeng Xue, Wenhui Zamanian, Kazem Colin, Christophe Duchamp-Alphonse, Stéphanie Pei, Wentao |
author_sort |
Sun, Qingfeng |
title |
Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
title_short |
Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
title_full |
Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
title_fullStr |
Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
title_full_unstemmed |
Formation and paleoenvironment of rhizoliths of Shiyang River Basin, Tengeri Desert, NW China |
title_sort |
formation and paleoenvironment of rhizoliths of shiyang river basin, tengeri desert, nw china |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02092664 https://doi.org/10.1016/j.quaint.2018.06.046 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
ISSN: 1040-6182 Quaternary International https://hal.science/hal-02092664 Quaternary International, 2019, 502, pp.246-257. ⟨10.1016/j.quaint.2018.06.046⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quaint.2018.06.046 hal-02092664 https://hal.science/hal-02092664 doi:10.1016/j.quaint.2018.06.046 |
op_doi |
https://doi.org/10.1016/j.quaint.2018.06.046 |
container_title |
Quaternary International |
container_volume |
502 |
container_start_page |
246 |
op_container_end_page |
257 |
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1802006090773168128 |