Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap
International audience Previous spectroscopic studies have shown the presence of hydrated minerals in various kinds of sedimentary accumulations covering and encircling the Martian North Polar Cap. More specifically, gypsum, a hydrated calcium sulfate, has been detected on Olympia Planum, a restrict...
Published in: | Icarus |
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Main Authors: | , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.science/hal-00676210 https://hal.science/hal-00676210/document https://hal.science/hal-00676210/file/PEER_stage2_10.1016%252Fj.icarus.2010.04.017.pdf https://doi.org/10.1016/j.icarus.2010.04.017 |
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Open Polar |
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Portail des publications scientifiques de l’Université d’Angers (HAL) |
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ftunivangershal |
language |
English |
topic |
polar caps Mars polar geology mineralogy Ices IR Spectroscopy surface [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
polar caps Mars polar geology mineralogy Ices IR Spectroscopy surface [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Massé, Marion Bourgeois, Olivier Le Mouélic, Stéphane Verpoorter, Charles Le Deit, Laetitia Bibring, Jean-Pierre Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
topic_facet |
polar caps Mars polar geology mineralogy Ices IR Spectroscopy surface [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Previous spectroscopic studies have shown the presence of hydrated minerals in various kinds of sedimentary accumulations covering and encircling the Martian North Polar Cap. More specifically, gypsum, a hydrated calcium sulfate, has been detected on Olympia Planum, a restricted part of the Circumpolar Dune Field. To further constrain the geographical distribution and the process of formation and accumulation of these hydrated minerals, we performed an integrated morphological, structural and compositional analysis of a key area where hydrated minerals were detected and where the main polar landforms are present. By the development of a spectral processing method based on spectral derivation and by the acquisition of laboratory spectra of gypsum-ice mixtures we find that gypsum-bearing sediment is not restricted to the Olympia Planum dunes but is also present in all kinds of superficial sediment covering the surface of the North Polar Cap and the Circumpolar Dune Field. Spectral signatures consistent with perchlorates are also detected on these deposits. The interpretation of landforms reveals that this gypsum-bearing sediment was released from the ice cap by sublimation. We thus infer that gypsum crystals that are now present in the Circum-Polar Dune Field derive from the interior of the North Polar Cap. Gypsum crystals that were initially trapped in the ice cap have been released by sublimation of the ice and have accumulated in the form of ablation tills at the surface of the ice cap. These gypsum-bearing sublimation tills are reworked by winds and are transported towards the Circum-Polar Dune Field. Comparison with sulfates found in terrestrial glaciers suggests that gypsum crystals in the Martian North Polar Cap have formed by weathering of dust particles, either in the atmosphere prior to their deposition during the formation of the ice cap, and/or in the ice cap after their deposition. |
author2 |
Laboratoire de Planétologie et Géodynamique de Nantes UMR 6112 (LPGN) Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) DLR Institut für Planetenforschung Deutsches Zentrum für Luft- und Raumfahrt Berlin (DLR) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut d'astrophysique spatiale (IAS) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) |
format |
Article in Journal/Newspaper |
author |
Massé, Marion Bourgeois, Olivier Le Mouélic, Stéphane Verpoorter, Charles Le Deit, Laetitia Bibring, Jean-Pierre |
author_facet |
Massé, Marion Bourgeois, Olivier Le Mouélic, Stéphane Verpoorter, Charles Le Deit, Laetitia Bibring, Jean-Pierre |
author_sort |
Massé, Marion |
title |
Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
title_short |
Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
title_full |
Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
title_fullStr |
Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
title_full_unstemmed |
Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap |
title_sort |
martian polar and circum-polar sulfate-bearing deposits: sublimation tills derived from the north polar cap |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00676210 https://hal.science/hal-00676210/document https://hal.science/hal-00676210/file/PEER_stage2_10.1016%252Fj.icarus.2010.04.017.pdf https://doi.org/10.1016/j.icarus.2010.04.017 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-00676210 Icarus, 2010, 209 (2), pp.434-451. ⟨10.1016/j.icarus.2010.04.017⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2010.04.017 hal-00676210 https://hal.science/hal-00676210 https://hal.science/hal-00676210/document https://hal.science/hal-00676210/file/PEER_stage2_10.1016%252Fj.icarus.2010.04.017.pdf doi:10.1016/j.icarus.2010.04.017 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.icarus.2010.04.017 |
container_title |
Icarus |
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209 |
container_issue |
2 |
container_start_page |
434 |
op_container_end_page |
451 |
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1782335120140664832 |
spelling |
ftunivangershal:oai:HAL:hal-00676210v1 2023-11-12T04:18:32+01:00 Martian polar and circum-polar sulfate-bearing deposits: Sublimation tills derived from the north polar cap Massé, Marion Bourgeois, Olivier Le Mouélic, Stéphane Verpoorter, Charles Le Deit, Laetitia Bibring, Jean-Pierre Laboratoire de Planétologie et Géodynamique de Nantes UMR 6112 (LPGN) Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) DLR Institut für Planetenforschung Deutsches Zentrum für Luft- und Raumfahrt Berlin (DLR) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut d'astrophysique spatiale (IAS) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) 2010-09-04 https://hal.science/hal-00676210 https://hal.science/hal-00676210/document https://hal.science/hal-00676210/file/PEER_stage2_10.1016%252Fj.icarus.2010.04.017.pdf https://doi.org/10.1016/j.icarus.2010.04.017 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2010.04.017 hal-00676210 https://hal.science/hal-00676210 https://hal.science/hal-00676210/document https://hal.science/hal-00676210/file/PEER_stage2_10.1016%252Fj.icarus.2010.04.017.pdf doi:10.1016/j.icarus.2010.04.017 info:eu-repo/semantics/OpenAccess ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-00676210 Icarus, 2010, 209 (2), pp.434-451. ⟨10.1016/j.icarus.2010.04.017⟩ polar caps Mars polar geology mineralogy Ices IR Spectroscopy surface [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2010 ftunivangershal https://doi.org/10.1016/j.icarus.2010.04.017 2023-11-01T17:17:29Z International audience Previous spectroscopic studies have shown the presence of hydrated minerals in various kinds of sedimentary accumulations covering and encircling the Martian North Polar Cap. More specifically, gypsum, a hydrated calcium sulfate, has been detected on Olympia Planum, a restricted part of the Circumpolar Dune Field. To further constrain the geographical distribution and the process of formation and accumulation of these hydrated minerals, we performed an integrated morphological, structural and compositional analysis of a key area where hydrated minerals were detected and where the main polar landforms are present. By the development of a spectral processing method based on spectral derivation and by the acquisition of laboratory spectra of gypsum-ice mixtures we find that gypsum-bearing sediment is not restricted to the Olympia Planum dunes but is also present in all kinds of superficial sediment covering the surface of the North Polar Cap and the Circumpolar Dune Field. Spectral signatures consistent with perchlorates are also detected on these deposits. The interpretation of landforms reveals that this gypsum-bearing sediment was released from the ice cap by sublimation. We thus infer that gypsum crystals that are now present in the Circum-Polar Dune Field derive from the interior of the North Polar Cap. Gypsum crystals that were initially trapped in the ice cap have been released by sublimation of the ice and have accumulated in the form of ablation tills at the surface of the ice cap. These gypsum-bearing sublimation tills are reworked by winds and are transported towards the Circum-Polar Dune Field. Comparison with sulfates found in terrestrial glaciers suggests that gypsum crystals in the Martian North Polar Cap have formed by weathering of dust particles, either in the atmosphere prior to their deposition during the formation of the ice cap, and/or in the ice cap after their deposition. Article in Journal/Newspaper Ice cap Portail des publications scientifiques de l’Université d’Angers (HAL) Icarus 209 2 434 451 |