Hydrothermally enhanced magnetization at the center of the Haughton impact structure?
International audience Haughton is a ~24 Myr old mid-size (apparent diameter 23 km) complex impact structure located on Devon Island in Nunavut, Canada. The center of the structure shows a negative gravity anomaly of -12 mgal coupled to a localized positive magnetic field anomaly of ~900 nT. A field...
Published in: | Meteoritics & Planetary Science |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal.science/hal-02003218 https://hal.science/hal-02003218/document https://hal.science/hal-02003218/file/Zylberman_et_al_MAPS_2017_BeforeProofs.pdf https://doi.org/10.1111/maps.12917 |
id |
ftunivaixmarseil:oai:HAL:hal-02003218v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivaixmarseil:oai:HAL:hal-02003218v1 2023-12-17T10:29:24+01:00 Hydrothermally enhanced magnetization at the center of the Haughton impact structure? Zylberman, William Quesnel, Yoann Rochette, Pierre Osinski, Gordon R. Marion, Cassandra Gattacceca, Jérôme Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) University of Western Ontario (UWO) Mitacs and Campus France ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011) 2017 https://hal.science/hal-02003218 https://hal.science/hal-02003218/document https://hal.science/hal-02003218/file/Zylberman_et_al_MAPS_2017_BeforeProofs.pdf https://doi.org/10.1111/maps.12917 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/maps.12917 hal-02003218 https://hal.science/hal-02003218 https://hal.science/hal-02003218/document https://hal.science/hal-02003218/file/Zylberman_et_al_MAPS_2017_BeforeProofs.pdf doi:10.1111/maps.12917 info:eu-repo/semantics/OpenAccess ISSN: 1086-9379 EISSN: 1945-5100 Meteoritics and Planetary Science https://hal.science/hal-02003218 Meteoritics and Planetary Science, 2017, 52 (10), pp.2147-2165. ⟨10.1111/maps.12917⟩ [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2017 ftunivaixmarseil https://doi.org/10.1111/maps.12917 2023-11-21T23:48:01Z International audience Haughton is a ~24 Myr old mid-size (apparent diameter 23 km) complex impact structure located on Devon Island in Nunavut, Canada. The center of the structure shows a negative gravity anomaly of -12 mgal coupled to a localized positive magnetic field anomaly of ~900 nT. A field expedition in 2013 led to the acquisition of new ground magnetic field mapping and electrical resistivity datasets, as well as the first subsurface drill cores down to 13 m depth at the top of the magnetic field anomaly. Petrography, rock magnetic and petrophysical measurements were performed on the cores and revealed two different types of clast-rich polymict impactites: (1) a white hydrothermally-altered impact breccia, not previously observed at Haughton, and (2) a grey impact breccia with no macroscopic sign of alteration. In the altered core, gypsum is present in macroscopic veins and in the form of intergranular selenite associated with colored and zoned carbonate clasts. This altered core has a natural remanent magnetization (NRM) four to five times higher than materials from the other core but the same magnetic susceptibility. Their magnetization is still higher than the surrounding crater-fill impact melt rocks. X-ray Fluorescence data indicate a similar proportion of iron-rich phases in both cores and an enrichment in silicates within the altered core. In addition, alternating-field demagnetization results show that one main process remagnetized the rocks. These results support the hypothesis that intense and possibly localized post-impact hydrothermal alteration enhanced the magnetization of the clast-rich impact melt rocks by crystallization of magnetite within the center of the Haughton impact structure. Subsequent erosion was followed by in-situ concentration in the subsurface leading to large magnetic gradient on surface. Article in Journal/Newspaper Devon Island Nunavut Aix-Marseille Université: HAL Canada Devon Island ENVELOPE(-88.000,-88.000,75.252,75.252) New Ground ENVELOPE(-55.215,-55.215,49.567,49.567) Nunavut Meteoritics & Planetary Science 52 10 2147 2165 |
institution |
Open Polar |
collection |
Aix-Marseille Université: HAL |
op_collection_id |
ftunivaixmarseil |
language |
English |
topic |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Zylberman, William Quesnel, Yoann Rochette, Pierre Osinski, Gordon R. Marion, Cassandra Gattacceca, Jérôme Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
topic_facet |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Haughton is a ~24 Myr old mid-size (apparent diameter 23 km) complex impact structure located on Devon Island in Nunavut, Canada. The center of the structure shows a negative gravity anomaly of -12 mgal coupled to a localized positive magnetic field anomaly of ~900 nT. A field expedition in 2013 led to the acquisition of new ground magnetic field mapping and electrical resistivity datasets, as well as the first subsurface drill cores down to 13 m depth at the top of the magnetic field anomaly. Petrography, rock magnetic and petrophysical measurements were performed on the cores and revealed two different types of clast-rich polymict impactites: (1) a white hydrothermally-altered impact breccia, not previously observed at Haughton, and (2) a grey impact breccia with no macroscopic sign of alteration. In the altered core, gypsum is present in macroscopic veins and in the form of intergranular selenite associated with colored and zoned carbonate clasts. This altered core has a natural remanent magnetization (NRM) four to five times higher than materials from the other core but the same magnetic susceptibility. Their magnetization is still higher than the surrounding crater-fill impact melt rocks. X-ray Fluorescence data indicate a similar proportion of iron-rich phases in both cores and an enrichment in silicates within the altered core. In addition, alternating-field demagnetization results show that one main process remagnetized the rocks. These results support the hypothesis that intense and possibly localized post-impact hydrothermal alteration enhanced the magnetization of the clast-rich impact melt rocks by crystallization of magnetite within the center of the Haughton impact structure. Subsequent erosion was followed by in-situ concentration in the subsurface leading to large magnetic gradient on surface. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) University of Western Ontario (UWO) Mitacs and Campus France ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011) |
format |
Article in Journal/Newspaper |
author |
Zylberman, William Quesnel, Yoann Rochette, Pierre Osinski, Gordon R. Marion, Cassandra Gattacceca, Jérôme |
author_facet |
Zylberman, William Quesnel, Yoann Rochette, Pierre Osinski, Gordon R. Marion, Cassandra Gattacceca, Jérôme |
author_sort |
Zylberman, William |
title |
Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
title_short |
Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
title_full |
Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
title_fullStr |
Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
title_full_unstemmed |
Hydrothermally enhanced magnetization at the center of the Haughton impact structure? |
title_sort |
hydrothermally enhanced magnetization at the center of the haughton impact structure? |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-02003218 https://hal.science/hal-02003218/document https://hal.science/hal-02003218/file/Zylberman_et_al_MAPS_2017_BeforeProofs.pdf https://doi.org/10.1111/maps.12917 |
long_lat |
ENVELOPE(-88.000,-88.000,75.252,75.252) ENVELOPE(-55.215,-55.215,49.567,49.567) |
geographic |
Canada Devon Island New Ground Nunavut |
geographic_facet |
Canada Devon Island New Ground Nunavut |
genre |
Devon Island Nunavut |
genre_facet |
Devon Island Nunavut |
op_source |
ISSN: 1086-9379 EISSN: 1945-5100 Meteoritics and Planetary Science https://hal.science/hal-02003218 Meteoritics and Planetary Science, 2017, 52 (10), pp.2147-2165. ⟨10.1111/maps.12917⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/maps.12917 hal-02003218 https://hal.science/hal-02003218 https://hal.science/hal-02003218/document https://hal.science/hal-02003218/file/Zylberman_et_al_MAPS_2017_BeforeProofs.pdf doi:10.1111/maps.12917 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/maps.12917 |
container_title |
Meteoritics & Planetary Science |
container_volume |
52 |
container_issue |
10 |
container_start_page |
2147 |
op_container_end_page |
2165 |
_version_ |
1785581770032283648 |