Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams
International audience The Mars South Polar Layered Deposits (SPLD) are the result of depositional and erosional events, which are marked by different stratigraphic sequences and erosional surfaces. To unambiguously define the stratigraphic units at regional scale, we mapped the SPLD on the basis of...
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ftinsu:oai:HAL:hal-03658675v1 2023-11-05T03:42:43+01:00 Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams Guallini, Luca Rossi, Angelo Pio Forget, François Marinangeli, Lucia Lauro, Sebastian Emanuel Pettinelli, Elena Seu, Roberto Thomas, Nicolas Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) 2018 https://hal.science/hal-03658675 https://doi.org/10.1016/j.icarus.2017.08.030 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2017.08.030 hal-03658675 https://hal.science/hal-03658675 BIBCODE: 2018Icar.308.76G doi:10.1016/j.icarus.2017.08.030 ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-03658675 Icarus, 2018, 308, pp.76-107. ⟨10.1016/j.icarus.2017.08.030⟩ Geological processes Mars polar geology surface Image processing [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftinsu https://doi.org/10.1016/j.icarus.2017.08.030 2023-10-11T16:30:07Z International audience The Mars South Polar Layered Deposits (SPLD) are the result of depositional and erosional events, which are marked by different stratigraphic sequences and erosional surfaces. To unambiguously define the stratigraphic units at regional scale, we mapped the SPLD on the basis of observed discontinuities (i.e., unconformities, correlative discontinuities and conformities), as commonly done in terrestrial modern stratigraphy. This methodology is defined as "Discontinuity-Bounded Units" or allostratigraphy, and is complemented by geomorphological mapping. Our study focuses on Promethei Lingula (PL) and uses both high-resolution images (CTX, HiRISE) and radargrams (SHARAD) to combine surface and sub-surface observations and obtain a 3D geological reconstruction of the SPLD. One regional discontinuity (named AUR1) was defined within the studied stratigraphic succession and is exposed in several non-contiguous outcrops around PL as well as observed at depth within the ice sheet. This is the primary contact between two major depositional sequences, showing a different texture at CTX resolution. The lower sequence is characterized mainly by a "ridge and trough" morphology (Ridge and Trough Sequence; RTS) and the upper sequence shows mainly by a "stair-stepped" morphology (Stair-Stepped Sequence; SSS). On the basis of the observations, we defined two regional "discontinuity-bounded" units in PL, respectively coinciding with RTS and SSS sequences. Our stratigraphic reconstruction provides new hints on the major scale events that shaped this region. Oscillations in Martian axial obliquity could have controlled local climate conditions in the past, affecting the PL geological record. Article in Journal/Newspaper Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Icarus 308 76 107 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Geological processes Mars polar geology surface Image processing [SDU]Sciences of the Universe [physics] |
spellingShingle |
Geological processes Mars polar geology surface Image processing [SDU]Sciences of the Universe [physics] Guallini, Luca Rossi, Angelo Pio Forget, François Marinangeli, Lucia Lauro, Sebastian Emanuel Pettinelli, Elena Seu, Roberto Thomas, Nicolas Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
topic_facet |
Geological processes Mars polar geology surface Image processing [SDU]Sciences of the Universe [physics] |
description |
International audience The Mars South Polar Layered Deposits (SPLD) are the result of depositional and erosional events, which are marked by different stratigraphic sequences and erosional surfaces. To unambiguously define the stratigraphic units at regional scale, we mapped the SPLD on the basis of observed discontinuities (i.e., unconformities, correlative discontinuities and conformities), as commonly done in terrestrial modern stratigraphy. This methodology is defined as "Discontinuity-Bounded Units" or allostratigraphy, and is complemented by geomorphological mapping. Our study focuses on Promethei Lingula (PL) and uses both high-resolution images (CTX, HiRISE) and radargrams (SHARAD) to combine surface and sub-surface observations and obtain a 3D geological reconstruction of the SPLD. One regional discontinuity (named AUR1) was defined within the studied stratigraphic succession and is exposed in several non-contiguous outcrops around PL as well as observed at depth within the ice sheet. This is the primary contact between two major depositional sequences, showing a different texture at CTX resolution. The lower sequence is characterized mainly by a "ridge and trough" morphology (Ridge and Trough Sequence; RTS) and the upper sequence shows mainly by a "stair-stepped" morphology (Stair-Stepped Sequence; SSS). On the basis of the observations, we defined two regional "discontinuity-bounded" units in PL, respectively coinciding with RTS and SSS sequences. Our stratigraphic reconstruction provides new hints on the major scale events that shaped this region. Oscillations in Martian axial obliquity could have controlled local climate conditions in the past, affecting the PL geological record. |
author2 |
Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Guallini, Luca Rossi, Angelo Pio Forget, François Marinangeli, Lucia Lauro, Sebastian Emanuel Pettinelli, Elena Seu, Roberto Thomas, Nicolas |
author_facet |
Guallini, Luca Rossi, Angelo Pio Forget, François Marinangeli, Lucia Lauro, Sebastian Emanuel Pettinelli, Elena Seu, Roberto Thomas, Nicolas |
author_sort |
Guallini, Luca |
title |
Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
title_short |
Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
title_full |
Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
title_fullStr |
Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
title_full_unstemmed |
Regional stratigraphy of the south polar layered deposits (Promethei Lingula, Mars): "Discontinuity-bounded" units in images and radargrams |
title_sort |
regional stratigraphy of the south polar layered deposits (promethei lingula, mars): "discontinuity-bounded" units in images and radargrams |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-03658675 https://doi.org/10.1016/j.icarus.2017.08.030 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0019-1035 EISSN: 1090-2643 Icarus https://hal.science/hal-03658675 Icarus, 2018, 308, pp.76-107. ⟨10.1016/j.icarus.2017.08.030⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.icarus.2017.08.030 hal-03658675 https://hal.science/hal-03658675 BIBCODE: 2018Icar.308.76G doi:10.1016/j.icarus.2017.08.030 |
op_doi |
https://doi.org/10.1016/j.icarus.2017.08.030 |
container_title |
Icarus |
container_volume |
308 |
container_start_page |
76 |
op_container_end_page |
107 |
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1781700113403478016 |