The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges
We present a 3-D crustal model of the East Greenland Fjord Region between 69°N and 74°N. The model covers the Precambrian shield and the Caledonian orogenic belt, the adjoining Devonian and Mesozoic basins, the continent-ocean transition and the Cenozoic oceanic areas as far as the Kolbeinsey and th...
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Online Access: | https://epic.awi.de/id/eprint/10468/ https://doi.org/10.1111/j.1365-246X.2005.02515.x https://hdl.handle.net/10013/epic.20945 |
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ftawi:oai:epic.awi.de:10468 2023-09-05T13:19:10+02:00 The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges Schmidt-Aursch, Mechita C. Jokat, Wilfried 2005 https://epic.awi.de/id/eprint/10468/ https://doi.org/10.1111/j.1365-246X.2005.02515.x https://hdl.handle.net/10013/epic.20945 unknown Schmidt-Aursch, M. C. orcid:0000-0002-2393-4514 and Jokat, W. orcid:0000-0002-7793-5854 (2005) The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges , Geophysical journal international, 160 (2), pp. 753-760 . doi:10.1111/j.1365-246X.2005.02515.x <https://doi.org/10.1111/j.1365-246X.2005.02515.x> , hdl:10013/epic.20945 EPIC3Geophysical journal international, 160(2), pp. 753-760 Article isiRev 2005 ftawi https://doi.org/10.1111/j.1365-246X.2005.02515.x 2023-08-22T19:48:43Z We present a 3-D crustal model of the East Greenland Fjord Region between 69°N and 74°N. The model covers the Precambrian shield and the Caledonian orogenic belt, the adjoining Devonian and Mesozoic basins, the continent-ocean transition and the Cenozoic oceanic areas as far as the Kolbeinsey and the Mohns mid-oceanic ridges. Existing seismic models of the crustal structure are extrapolated into adjacent areas using 3-D gravity modelling. For this purpose, we compile a new regional-scale Bouguer anomaly map. The Precambrian shield, west of the Caledonian orogen (approximately west of 32°W), shows a mean thickness of 35 km with only small-scale undulations. This thickness is at the lower limit of the global range in shield thickness. The Caledonian orogen exhibits a pronounced mountain root with overall crustal thicknesses up to 51 km. Beside the Urals, the East Greenland Caledonides are one of the two Palaeozoic mountain belts where a crustal root has preserved to the present day. Continuation of the crustal model to the east, beyond the continent-ocean transition, yielded thicknesses of the crystalline oceanic crust from 9 km near the Kolbeinsey Ridge to 3 km west of the Mohns Ridge. Differences in the thermal structures of the old continental and the young oceanic lithosphere are responsible for the low-density mantle beneath the oceanic crust, which is also demonstrated by 3-D gravity modelling. Article in Journal/Newspaper East Greenland Greenland Kolbeinsey Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Kolbeinsey ENVELOPE(-18.687,-18.687,67.149,67.149) Kolbeinsey Ridge ENVELOPE(-16.917,-16.917,68.833,68.833) Geophysical Journal International 160 2 753 760 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We present a 3-D crustal model of the East Greenland Fjord Region between 69°N and 74°N. The model covers the Precambrian shield and the Caledonian orogenic belt, the adjoining Devonian and Mesozoic basins, the continent-ocean transition and the Cenozoic oceanic areas as far as the Kolbeinsey and the Mohns mid-oceanic ridges. Existing seismic models of the crustal structure are extrapolated into adjacent areas using 3-D gravity modelling. For this purpose, we compile a new regional-scale Bouguer anomaly map. The Precambrian shield, west of the Caledonian orogen (approximately west of 32°W), shows a mean thickness of 35 km with only small-scale undulations. This thickness is at the lower limit of the global range in shield thickness. The Caledonian orogen exhibits a pronounced mountain root with overall crustal thicknesses up to 51 km. Beside the Urals, the East Greenland Caledonides are one of the two Palaeozoic mountain belts where a crustal root has preserved to the present day. Continuation of the crustal model to the east, beyond the continent-ocean transition, yielded thicknesses of the crystalline oceanic crust from 9 km near the Kolbeinsey Ridge to 3 km west of the Mohns Ridge. Differences in the thermal structures of the old continental and the young oceanic lithosphere are responsible for the low-density mantle beneath the oceanic crust, which is also demonstrated by 3-D gravity modelling. |
format |
Article in Journal/Newspaper |
author |
Schmidt-Aursch, Mechita C. Jokat, Wilfried |
spellingShingle |
Schmidt-Aursch, Mechita C. Jokat, Wilfried The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
author_facet |
Schmidt-Aursch, Mechita C. Jokat, Wilfried |
author_sort |
Schmidt-Aursch, Mechita C. |
title |
The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
title_short |
The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
title_full |
The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
title_fullStr |
The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
title_full_unstemmed |
The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges |
title_sort |
crustal structure of central east greenland - ii: from the precambrian shield to the recent mid-oceanic ridges |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/10468/ https://doi.org/10.1111/j.1365-246X.2005.02515.x https://hdl.handle.net/10013/epic.20945 |
long_lat |
ENVELOPE(-18.687,-18.687,67.149,67.149) ENVELOPE(-16.917,-16.917,68.833,68.833) |
geographic |
Greenland Kolbeinsey Kolbeinsey Ridge |
geographic_facet |
Greenland Kolbeinsey Kolbeinsey Ridge |
genre |
East Greenland Greenland Kolbeinsey |
genre_facet |
East Greenland Greenland Kolbeinsey |
op_source |
EPIC3Geophysical journal international, 160(2), pp. 753-760 |
op_relation |
Schmidt-Aursch, M. C. orcid:0000-0002-2393-4514 and Jokat, W. orcid:0000-0002-7793-5854 (2005) The crustal structure of central East Greenland - II: From the Precambrian shield to the recent mid-oceanic ridges , Geophysical journal international, 160 (2), pp. 753-760 . doi:10.1111/j.1365-246X.2005.02515.x <https://doi.org/10.1111/j.1365-246X.2005.02515.x> , hdl:10013/epic.20945 |
op_doi |
https://doi.org/10.1111/j.1365-246X.2005.02515.x |
container_title |
Geophysical Journal International |
container_volume |
160 |
container_issue |
2 |
container_start_page |
753 |
op_container_end_page |
760 |
_version_ |
1776199976431386624 |