Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland
Igneous sheet-complexes transport magma through the crust, but most studies have focused on single segments of the magma-transport-system or have low resolution. In the Jameson Land Basin in East Greenland, reflection-seismic data and extensive outcrops give unparalleled constraints on mafic intrusi...
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ftdatacite:10.6084/m9.figshare.c.5670470.v1 2023-05-15T16:03:39+02:00 Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland Eide, Christian Haug Schofield, Nick Howell, John Jerram, Dougal A. 2021 https://dx.doi.org/10.6084/m9.figshare.c.5670470.v1 https://geolsoc.figshare.com/collections/Transport_of_mafic_magma_through_the_crust_and_sedimentary_basins_Jameson_Land_East_Greenland/5670470/1 unknown Geological Society of London https://dx.doi.org/10.1144/jgs2021-043 https://dx.doi.org/10.6084/m9.figshare.c.5670470 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences Collection article 2021 ftdatacite https://doi.org/10.6084/m9.figshare.c.5670470.v1 https://doi.org/10.1144/jgs2021-043 https://doi.org/10.6084/m9.figshare.c.5670470 2021-11-05T12:55:41Z Igneous sheet-complexes transport magma through the crust, but most studies have focused on single segments of the magma-transport-system or have low resolution. In the Jameson Land Basin in East Greenland, reflection-seismic data and extensive outcrops give unparalleled constraints on mafic intrusions down to 15 km. This dataset shows how sill-complexes develop and how magma is transported from the mantle through sedimentary basins. The feeder zone of the sill-complex is a narrow zone below basin, where a magmatic underplate body impinges on thinned crust. Magma was transported through the crystalline crust through dykes. Seismic data and published geochemistry indicate magma was supplied from a magmatic underplate, without perceptible storage in crustal magma-chambers and crustal assimilation. As magma entered the sedimentary basin, it formed distributed, bowl-shaped sill-complexes throughout the basin. Large magma volumes in sills (4–20 times larger than the Skaergaard Intrusion), and few dykes highlight the importance of sills in crustal magma transport. On scales smaller than 0.2 km, host-rock lithology, and particularly mudstone tensile strength-anisotropy, controls sill-architecture in the upper 10km of the basin, whereas sills are bowl shaped below the brittle-ductile transition zone. On scales of kilometres and towards basin margins, tectonic stresses and lateral lithological changes dominate architecture of sills. Article in Journal/Newspaper East Greenland Greenland DataCite Metadata Store (German National Library of Science and Technology) Greenland Jameson Land ENVELOPE(-23.500,-23.500,71.167,71.167) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Eide, Christian Haug Schofield, Nick Howell, John Jerram, Dougal A. Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Igneous sheet-complexes transport magma through the crust, but most studies have focused on single segments of the magma-transport-system or have low resolution. In the Jameson Land Basin in East Greenland, reflection-seismic data and extensive outcrops give unparalleled constraints on mafic intrusions down to 15 km. This dataset shows how sill-complexes develop and how magma is transported from the mantle through sedimentary basins. The feeder zone of the sill-complex is a narrow zone below basin, where a magmatic underplate body impinges on thinned crust. Magma was transported through the crystalline crust through dykes. Seismic data and published geochemistry indicate magma was supplied from a magmatic underplate, without perceptible storage in crustal magma-chambers and crustal assimilation. As magma entered the sedimentary basin, it formed distributed, bowl-shaped sill-complexes throughout the basin. Large magma volumes in sills (4–20 times larger than the Skaergaard Intrusion), and few dykes highlight the importance of sills in crustal magma transport. On scales smaller than 0.2 km, host-rock lithology, and particularly mudstone tensile strength-anisotropy, controls sill-architecture in the upper 10km of the basin, whereas sills are bowl shaped below the brittle-ductile transition zone. On scales of kilometres and towards basin margins, tectonic stresses and lateral lithological changes dominate architecture of sills. |
format |
Article in Journal/Newspaper |
author |
Eide, Christian Haug Schofield, Nick Howell, John Jerram, Dougal A. |
author_facet |
Eide, Christian Haug Schofield, Nick Howell, John Jerram, Dougal A. |
author_sort |
Eide, Christian Haug |
title |
Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
title_short |
Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
title_full |
Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
title_fullStr |
Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
title_full_unstemmed |
Transport of mafic magma through the crust and sedimentary basins: Jameson Land, East Greenland |
title_sort |
transport of mafic magma through the crust and sedimentary basins: jameson land, east greenland |
publisher |
Geological Society of London |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5670470.v1 https://geolsoc.figshare.com/collections/Transport_of_mafic_magma_through_the_crust_and_sedimentary_basins_Jameson_Land_East_Greenland/5670470/1 |
long_lat |
ENVELOPE(-23.500,-23.500,71.167,71.167) |
geographic |
Greenland Jameson Land |
geographic_facet |
Greenland Jameson Land |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_relation |
https://dx.doi.org/10.1144/jgs2021-043 https://dx.doi.org/10.6084/m9.figshare.c.5670470 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5670470.v1 https://doi.org/10.1144/jgs2021-043 https://doi.org/10.6084/m9.figshare.c.5670470 |
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1766399349772779520 |