Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift.
Regional metamorphism in the Sulitjelma area of the arctic Scandinavian Caledonides has produced a series of Barrovian zones, from chlorite through to kyanite in more aluminous pelites, which transect the major lithological boundaries in a large nappe unit of the Köli Nappe Complex. The metamorphic...
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1992
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ftnerc:oai:nora.nerc.ac.uk:9072 2023-05-15T15:10:16+02:00 Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. Boyle, A.P. Westhead, R.K. 1992 http://nora.nerc.ac.uk/id/eprint/9072/ http://www3.interscience.wiley.com/journal/118532874/home unknown Wiley-Blackwell Boyle, A.P.; Westhead, R.K. 1992 Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. Journal of Metamorphic Geology, 10 (5). 615-626. https://doi.org/10.1111/j.1525-1314.1992.tb00110.x <https://doi.org/10.1111/j.1525-1314.1992.tb00110.x> Earth Sciences Publication - Article PeerReviewed 1992 ftnerc https://doi.org/10.1111/j.1525-1314.1992.tb00110.x 2023-02-04T19:25:51Z Regional metamorphism in the Sulitjelma area of the arctic Scandinavian Caledonides has produced a series of Barrovian zones, from chlorite through to kyanite in more aluminous pelites, which transect the major lithological boundaries in a large nappe unit of the Köli Nappe Complex. The metamorphic zones are inverted, and metamorphic grade increases westwards from the foreland to the hinterland. The Furulund Group comprises a mixed sequence of originally flysch-like sediments which crop out over the whole range of the observed Barrovian zones, but are usually too calcareous to develop the characteristic Barrovian aluminous phases staurolite and kyanite. Instead, above the garnet isograd, the Furulund Group pelites and semi-pelites have widely developed hornblende porphyroblasts in the common assemblage Grt + Pl + Bt + Ms + Qtz ± Hbl ± Ep ± Czo ± Chl ± Cal ± Dol. Thermobarometric estimates of metamorphic peak P–T conditions (i.e. at maximum recorded temperatures) from this assemblage, using three different methods, indicate a westward increase of both pressure and temperature over a distance of 14 km away from the garnet isograd towards the hinterland of the orogen, independent of topographic level and without change in the common mineral assemblage. The increased peak pressure in the west indicates greater initial burial and subsequent exhumation in the hinterland than towards the foreland. Restoration indicates that the Furulund Group has been subjected to substantial eastward bulk tilting after peak metamorphic conditions. Whilst this enhances the overturning of the metamorphic zones, the amount of tilting was not sufficient to cause the overturning. Article in Journal/Newspaper Arctic Sulitjelma Natural Environment Research Council: NERC Open Research Archive Arctic Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Sulitjelma ENVELOPE(16.077,16.077,67.133,67.133) Furulund ENVELOPE(22.080,22.080,69.727,69.727) Journal of Metamorphic Geology 10 5 615 626 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Boyle, A.P. Westhead, R.K. Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
topic_facet |
Earth Sciences |
description |
Regional metamorphism in the Sulitjelma area of the arctic Scandinavian Caledonides has produced a series of Barrovian zones, from chlorite through to kyanite in more aluminous pelites, which transect the major lithological boundaries in a large nappe unit of the Köli Nappe Complex. The metamorphic zones are inverted, and metamorphic grade increases westwards from the foreland to the hinterland. The Furulund Group comprises a mixed sequence of originally flysch-like sediments which crop out over the whole range of the observed Barrovian zones, but are usually too calcareous to develop the characteristic Barrovian aluminous phases staurolite and kyanite. Instead, above the garnet isograd, the Furulund Group pelites and semi-pelites have widely developed hornblende porphyroblasts in the common assemblage Grt + Pl + Bt + Ms + Qtz ± Hbl ± Ep ± Czo ± Chl ± Cal ± Dol. Thermobarometric estimates of metamorphic peak P–T conditions (i.e. at maximum recorded temperatures) from this assemblage, using three different methods, indicate a westward increase of both pressure and temperature over a distance of 14 km away from the garnet isograd towards the hinterland of the orogen, independent of topographic level and without change in the common mineral assemblage. The increased peak pressure in the west indicates greater initial burial and subsequent exhumation in the hinterland than towards the foreland. Restoration indicates that the Furulund Group has been subjected to substantial eastward bulk tilting after peak metamorphic conditions. Whilst this enhances the overturning of the metamorphic zones, the amount of tilting was not sufficient to cause the overturning. |
format |
Article in Journal/Newspaper |
author |
Boyle, A.P. Westhead, R.K. |
author_facet |
Boyle, A.P. Westhead, R.K. |
author_sort |
Boyle, A.P. |
title |
Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
title_short |
Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
title_full |
Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
title_fullStr |
Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
title_full_unstemmed |
Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. |
title_sort |
metamorphic peak geothermobarometry in the furulund group, sulitjelma, scandinavian caledonides: implications for uplift. |
publisher |
Wiley-Blackwell |
publishDate |
1992 |
url |
http://nora.nerc.ac.uk/id/eprint/9072/ http://www3.interscience.wiley.com/journal/118532874/home |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) ENVELOPE(16.077,16.077,67.133,67.133) ENVELOPE(22.080,22.080,69.727,69.727) |
geographic |
Arctic Tilting Sulitjelma Furulund |
geographic_facet |
Arctic Tilting Sulitjelma Furulund |
genre |
Arctic Sulitjelma |
genre_facet |
Arctic Sulitjelma |
op_relation |
Boyle, A.P.; Westhead, R.K. 1992 Metamorphic peak geothermobarometry in the Furulund Group, Sulitjelma, Scandinavian Caledonides: implications for uplift. Journal of Metamorphic Geology, 10 (5). 615-626. https://doi.org/10.1111/j.1525-1314.1992.tb00110.x <https://doi.org/10.1111/j.1525-1314.1992.tb00110.x> |
op_doi |
https://doi.org/10.1111/j.1525-1314.1992.tb00110.x |
container_title |
Journal of Metamorphic Geology |
container_volume |
10 |
container_issue |
5 |
container_start_page |
615 |
op_container_end_page |
626 |
_version_ |
1766341313258586112 |