Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data
We support the very recent discovery of two impact craters under the ice of northwest Greenland (Hiawatha Glacier and Paterson). These discoveries are based mainly on geology and bedrock topography. We added an analysis of gravity field aspects (descriptors) in addition to the traditional gravity an...
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fttuostrava:oai:dspace.vsb.cz:10084/139484 2023-05-15T16:21:17+02:00 Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data Klokočník, Jaroslav Kostelecký, Jan Bezděk, Aleš Cílek, Václav Kletetschka, Gunther Staňková, Hana 2020 http://hdl.handle.net/10084/139484 https://doi.org/10.1016/j.tecto.2020.228396 en eng Elsevier Tectonophysics http://doi.org/10.1016/j.tecto.2020.228396 Tectonophysics. 2020, vol. 780, art. no. 228396. 0040-1951 1879-3266 http://hdl.handle.net/10084/139484 doi:10.1016/j.tecto.2020.228396 000527366300002 © 2020 Elsevier B.V. All rights reserved. impact crater in Greenland gravity aspects EIGEN 6C4 gravity field model magnetic anomalies article Peer-reviewed 2020 fttuostrava https://doi.org/10.1016/j.tecto.2020.228396 2020-06-29T23:11:28Z We support the very recent discovery of two impact craters under the ice of northwest Greenland (Hiawatha Glacier and Paterson). These discoveries are based mainly on geology and bedrock topography. We added an analysis of gravity field aspects (descriptors) in addition to the traditional gravity and magnetic anomalies. The gravity aspects (the Marussi tensor of the second derivatives, the gravity invariants and their special ratio, strike angles and virtual deformations) provide more complex and comprehensive information about the underground density variations due to a causative body than ordinary gravity anomalies. They show signals typical for the individual geological features like a mountain/volcano, fault, (river)valley, (paleo)lake, (ground)water, hydrocarbon/mineral deposits, etc., as well as for the targets known as impact craters. Our method has been tested on various geological features on the Earth and the Moon. The gravity aspects are, in our case, derived from the recent global static combined Earth gravity field model EIGEN 6C4 with a ground resolution similar to 9 km and a precision similar to 10 mGal. A further data come from the digital magnetic field database EMAG 2 with resolution similar to 5 km. Our method is novel and independent of anything which led to discoveries of these craters in Greenland. Web of Science 780 art. no. 228396 Article in Journal/Newspaper glacier Greenland Technical University of Ostrava: DSpace VŠB-TUO Fault River ENVELOPE(-117.587,-117.587,66.617,66.617) Greenland Paterson ENVELOPE(-154.600,-154.600,-78.033,-78.033) Tectonophysics 780 228396 |
institution |
Open Polar |
collection |
Technical University of Ostrava: DSpace VŠB-TUO |
op_collection_id |
fttuostrava |
language |
English |
topic |
impact crater in Greenland gravity aspects EIGEN 6C4 gravity field model magnetic anomalies |
spellingShingle |
impact crater in Greenland gravity aspects EIGEN 6C4 gravity field model magnetic anomalies Klokočník, Jaroslav Kostelecký, Jan Bezděk, Aleš Cílek, Václav Kletetschka, Gunther Staňková, Hana Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
topic_facet |
impact crater in Greenland gravity aspects EIGEN 6C4 gravity field model magnetic anomalies |
description |
We support the very recent discovery of two impact craters under the ice of northwest Greenland (Hiawatha Glacier and Paterson). These discoveries are based mainly on geology and bedrock topography. We added an analysis of gravity field aspects (descriptors) in addition to the traditional gravity and magnetic anomalies. The gravity aspects (the Marussi tensor of the second derivatives, the gravity invariants and their special ratio, strike angles and virtual deformations) provide more complex and comprehensive information about the underground density variations due to a causative body than ordinary gravity anomalies. They show signals typical for the individual geological features like a mountain/volcano, fault, (river)valley, (paleo)lake, (ground)water, hydrocarbon/mineral deposits, etc., as well as for the targets known as impact craters. Our method has been tested on various geological features on the Earth and the Moon. The gravity aspects are, in our case, derived from the recent global static combined Earth gravity field model EIGEN 6C4 with a ground resolution similar to 9 km and a precision similar to 10 mGal. A further data come from the digital magnetic field database EMAG 2 with resolution similar to 5 km. Our method is novel and independent of anything which led to discoveries of these craters in Greenland. Web of Science 780 art. no. 228396 |
format |
Article in Journal/Newspaper |
author |
Klokočník, Jaroslav Kostelecký, Jan Bezděk, Aleš Cílek, Václav Kletetschka, Gunther Staňková, Hana |
author_facet |
Klokočník, Jaroslav Kostelecký, Jan Bezděk, Aleš Cílek, Václav Kletetschka, Gunther Staňková, Hana |
author_sort |
Klokočník, Jaroslav |
title |
Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
title_short |
Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
title_full |
Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
title_fullStr |
Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
title_full_unstemmed |
Support for two subglacial impact craters in northwest Greenland from Earth gravity model EIGEN 6C4 and other data |
title_sort |
support for two subglacial impact craters in northwest greenland from earth gravity model eigen 6c4 and other data |
publisher |
Elsevier |
publishDate |
2020 |
url |
http://hdl.handle.net/10084/139484 https://doi.org/10.1016/j.tecto.2020.228396 |
long_lat |
ENVELOPE(-117.587,-117.587,66.617,66.617) ENVELOPE(-154.600,-154.600,-78.033,-78.033) |
geographic |
Fault River Greenland Paterson |
geographic_facet |
Fault River Greenland Paterson |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_relation |
Tectonophysics http://doi.org/10.1016/j.tecto.2020.228396 Tectonophysics. 2020, vol. 780, art. no. 228396. 0040-1951 1879-3266 http://hdl.handle.net/10084/139484 doi:10.1016/j.tecto.2020.228396 000527366300002 |
op_rights |
© 2020 Elsevier B.V. All rights reserved. |
op_doi |
https://doi.org/10.1016/j.tecto.2020.228396 |
container_title |
Tectonophysics |
container_volume |
780 |
container_start_page |
228396 |
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1766009295036481536 |