Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland
Field work for this thesis was conducted in Andreè Land, North-East Greenland Caledonides (73,35 N, 26,15 W), a region dominated by the Hagar Bjerg-Niggli Spids Thrust Sheet. The thrust sheet is composed of three main lithotectonic units from base upwards; 1) Paleoproterozoic ortho- and paragneisses...
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ftoslouniv:oai:www.duo.uio.no:10852/37130 2023-05-15T16:03:46+02:00 Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland Hauge, Kristina Arild Andresen og Deta Gasser 2013 http://hdl.handle.net/10852/37130 http://urn.nb.no/URN:NBN:no-38375 eng eng http://urn.nb.no/URN:NBN:no-38375 Hauge, Kristina. Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland. Masteroppgave, University of Oslo, 2013 http://hdl.handle.net/10852/37130 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Hauge, Kristina&rft.title=Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland&rft.inst=University of Oslo&rft.date=2013&rft.degree=Masteroppgave URN:NBN:no-38375 182126 Fulltext https://www.duo.uio.no/bitstream/handle/10852/37130/1/MASTER.pdf VDP::450 Master thesis Masteroppgave 2013 ftoslouniv 2020-06-21T08:47:20Z Field work for this thesis was conducted in Andreè Land, North-East Greenland Caledonides (73,35 N, 26,15 W), a region dominated by the Hagar Bjerg-Niggli Spids Thrust Sheet. The thrust sheet is composed of three main lithotectonic units from base upwards; 1) Paleoproterozoic ortho- and paragneisses, 2) the Late Mesoproterozoic Krummedal Supracrustal sequence, and 3) Neoproterozoic Eleonore Bay Supergroup, Tillite Group and the Late Cambrian to Ordovician Kong Oscar Fjord Group. The Krummedal sequence is intruded by c. 950 Ma granitoids, whereas c. 430-425 Ma granites are common in both the Krummedal sequence and the Lower Part of the Eleonore Bay Supergroup. The purpose of the study is to describe the main rock types and deformation structures in a transect through parts of the thrust sheet (Rendalen – Djævelkløften - Grejsdalen). The transect includes the lower and upper part of the Krummedal sequence and the lower part of the Eleonore Bay Supergroup. Particular focus has been on the kinematic history of two regionally extensive east-dipping faults, Grejsdalen and Rendalen Faults respectively, which are interpreted as segments of the Fjord Region Detachment Zone. The Grejsdalen fault is clearly an extensional fault placing lower grade Eleonore Bay Supergroup rocks of the hanging wall in tectonic contact with the high grade paragneisses of the Krummedal sequence in the footwall. Evidence for top-to-the-East displacement is not that obvious in the Rendalen Fault where migmatites in the hanging wall are in tectonic contact with the non-migmatite psammitic rocks in the footwall, both units being part of the Krummedal sequence. The appearance of higher grade rocks in the footwall has previously been used to argue that the Rendalen Fault is a top-to-the-W thrust, later reactivated as a top-to-the-E normal fault. A combined structural and petrological study was undertaken to test this hypothesis. The structural results show evidence of top-to-the-northeast extensional movement and no signs of earlier thrusting. The petrological study show P values of c. 12,5-15 kbars and T values of c. 650-700 °C from the footwall and P values of c. 8-9,5 kbars and T values of c. 650-700 °C from the hanging wall. Master Thesis East Greenland Greenland Kong Oscar fjord Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Greenland Grejsdalen ENVELOPE(-25.750,-25.750,73.583,73.583) Hagar Bjerg ENVELOPE(-27.717,-27.717,72.883,72.883) Kong Oscar Fjord ENVELOPE(-23.935,-23.935,72.361,72.361) |
institution |
Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
topic |
VDP::450 |
spellingShingle |
VDP::450 Hauge, Kristina Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
topic_facet |
VDP::450 |
description |
Field work for this thesis was conducted in Andreè Land, North-East Greenland Caledonides (73,35 N, 26,15 W), a region dominated by the Hagar Bjerg-Niggli Spids Thrust Sheet. The thrust sheet is composed of three main lithotectonic units from base upwards; 1) Paleoproterozoic ortho- and paragneisses, 2) the Late Mesoproterozoic Krummedal Supracrustal sequence, and 3) Neoproterozoic Eleonore Bay Supergroup, Tillite Group and the Late Cambrian to Ordovician Kong Oscar Fjord Group. The Krummedal sequence is intruded by c. 950 Ma granitoids, whereas c. 430-425 Ma granites are common in both the Krummedal sequence and the Lower Part of the Eleonore Bay Supergroup. The purpose of the study is to describe the main rock types and deformation structures in a transect through parts of the thrust sheet (Rendalen – Djævelkløften - Grejsdalen). The transect includes the lower and upper part of the Krummedal sequence and the lower part of the Eleonore Bay Supergroup. Particular focus has been on the kinematic history of two regionally extensive east-dipping faults, Grejsdalen and Rendalen Faults respectively, which are interpreted as segments of the Fjord Region Detachment Zone. The Grejsdalen fault is clearly an extensional fault placing lower grade Eleonore Bay Supergroup rocks of the hanging wall in tectonic contact with the high grade paragneisses of the Krummedal sequence in the footwall. Evidence for top-to-the-East displacement is not that obvious in the Rendalen Fault where migmatites in the hanging wall are in tectonic contact with the non-migmatite psammitic rocks in the footwall, both units being part of the Krummedal sequence. The appearance of higher grade rocks in the footwall has previously been used to argue that the Rendalen Fault is a top-to-the-W thrust, later reactivated as a top-to-the-E normal fault. A combined structural and petrological study was undertaken to test this hypothesis. The structural results show evidence of top-to-the-northeast extensional movement and no signs of earlier thrusting. The petrological study show P values of c. 12,5-15 kbars and T values of c. 650-700 °C from the footwall and P values of c. 8-9,5 kbars and T values of c. 650-700 °C from the hanging wall. |
author2 |
Arild Andresen og Deta Gasser |
format |
Master Thesis |
author |
Hauge, Kristina |
author_facet |
Hauge, Kristina |
author_sort |
Hauge, Kristina |
title |
Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
title_short |
Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
title_full |
Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
title_fullStr |
Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
title_full_unstemmed |
Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland |
title_sort |
structural and petrological data along a transect across the caledonian fjord region detachment zone in andreè land, north-east greenland |
publishDate |
2013 |
url |
http://hdl.handle.net/10852/37130 http://urn.nb.no/URN:NBN:no-38375 |
long_lat |
ENVELOPE(-25.750,-25.750,73.583,73.583) ENVELOPE(-27.717,-27.717,72.883,72.883) ENVELOPE(-23.935,-23.935,72.361,72.361) |
geographic |
Greenland Grejsdalen Hagar Bjerg Kong Oscar Fjord |
geographic_facet |
Greenland Grejsdalen Hagar Bjerg Kong Oscar Fjord |
genre |
East Greenland Greenland Kong Oscar fjord |
genre_facet |
East Greenland Greenland Kong Oscar fjord |
op_relation |
http://urn.nb.no/URN:NBN:no-38375 Hauge, Kristina. Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland. Masteroppgave, University of Oslo, 2013 http://hdl.handle.net/10852/37130 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft.au=Hauge, Kristina&rft.title=Structural and petrological data along a transect across the Caledonian Fjord Region Detachment Zone in Andreè Land, North-East Greenland&rft.inst=University of Oslo&rft.date=2013&rft.degree=Masteroppgave URN:NBN:no-38375 182126 Fulltext https://www.duo.uio.no/bitstream/handle/10852/37130/1/MASTER.pdf |
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1766399457441611776 |