Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea
This study presents palynostratigraphic and palynofacies analyses from the shallow stratigraphic core 7830/3-U-1, drilled through the Snadd Formation (equivalent to De Geerdalen Formation) offshore Kong Karls Land in the northern Barents Sea, Norwegian Arctic. The Norwegian Petroleum Directorate hav...
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The University of Bergen
2016
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ftunivbergen:oai:bora.uib.no:1956/12654 2023-05-15T15:01:55+02:00 Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea Miljeteig, Kurt Inge 2016-05-31 6539911 bytes application/pdf https://hdl.handle.net/1956/12654 eng eng The University of Bergen https://hdl.handle.net/1956/12654 Copyright the Author. All rights reserved Palynology palynofacies core log Late Triassic early Carnian Kong Karls Land Barents Sea Norwegian Arctic 756199 Master thesis 2016 ftunivbergen 2023-03-14T17:44:25Z This study presents palynostratigraphic and palynofacies analyses from the shallow stratigraphic core 7830/3-U-1, drilled through the Snadd Formation (equivalent to De Geerdalen Formation) offshore Kong Karls Land in the northern Barents Sea, Norwegian Arctic. The Norwegian Petroleum Directorate have drilled several stratigraphic cores in the northern Barents Sea, which offer a unique insight into the Late Triassic stratigraphy and paleogeography of the region. This study constitutes a part of a broader palynostratigraphic investigation of the late Middle to Late Triassic of the Barents Sea, currently being undertaken at the University of Bergen, with the aim of improving the biostratigraphic resolution. Thirty-one samples from the approximately 200 m long core were analysed for palynological purpose. The core yielded great diversity of well-preserved palynomorphs. The palynological association is considered to constitute a single assemblage which is assigned an early Late Triassic (early Carnian) age, consistent with previously published age constraints including Re-Os datings from the area. Interpretation of sedimentological data, integrated with palynological and palynofacies data, indicates seven prograding parasequences, bounded by marine flooding surfaces, interpreted to range from offshore to delta front depositional environments. Palynofacies analysis suggest cycles of amorphous organic matter content and the presence of marine acritarchs (microplankton) strengthening the evidence of progradational parasequences deposited in a paralic environment. The high relative abundance of hinterland pollen types, e.g. bisaccate pollen, indicate transportation over large area. Spores are interpreted to reflect the local vegetation growing on the margins of the basin, such as abundant fern spores like Deltoidospora, Dictyophyllidites and Leschikisporis which were recorded and indicates a temperate and humid climate, consistent with previous interpretations of Late Triassic palaeoclimate on the northern Pangaean ... Master Thesis Arctic Barents Sea Kong Karls Land University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Barents Sea Bergen De Geerdalen ENVELOPE(16.368,16.368,78.296,78.296) Kong Karls Land ENVELOPE(28.000,28.000,78.833,78.833) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Palynology palynofacies core log Late Triassic early Carnian Kong Karls Land Barents Sea Norwegian Arctic 756199 |
spellingShingle |
Palynology palynofacies core log Late Triassic early Carnian Kong Karls Land Barents Sea Norwegian Arctic 756199 Miljeteig, Kurt Inge Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
topic_facet |
Palynology palynofacies core log Late Triassic early Carnian Kong Karls Land Barents Sea Norwegian Arctic 756199 |
description |
This study presents palynostratigraphic and palynofacies analyses from the shallow stratigraphic core 7830/3-U-1, drilled through the Snadd Formation (equivalent to De Geerdalen Formation) offshore Kong Karls Land in the northern Barents Sea, Norwegian Arctic. The Norwegian Petroleum Directorate have drilled several stratigraphic cores in the northern Barents Sea, which offer a unique insight into the Late Triassic stratigraphy and paleogeography of the region. This study constitutes a part of a broader palynostratigraphic investigation of the late Middle to Late Triassic of the Barents Sea, currently being undertaken at the University of Bergen, with the aim of improving the biostratigraphic resolution. Thirty-one samples from the approximately 200 m long core were analysed for palynological purpose. The core yielded great diversity of well-preserved palynomorphs. The palynological association is considered to constitute a single assemblage which is assigned an early Late Triassic (early Carnian) age, consistent with previously published age constraints including Re-Os datings from the area. Interpretation of sedimentological data, integrated with palynological and palynofacies data, indicates seven prograding parasequences, bounded by marine flooding surfaces, interpreted to range from offshore to delta front depositional environments. Palynofacies analysis suggest cycles of amorphous organic matter content and the presence of marine acritarchs (microplankton) strengthening the evidence of progradational parasequences deposited in a paralic environment. The high relative abundance of hinterland pollen types, e.g. bisaccate pollen, indicate transportation over large area. Spores are interpreted to reflect the local vegetation growing on the margins of the basin, such as abundant fern spores like Deltoidospora, Dictyophyllidites and Leschikisporis which were recorded and indicates a temperate and humid climate, consistent with previous interpretations of Late Triassic palaeoclimate on the northern Pangaean ... |
format |
Master Thesis |
author |
Miljeteig, Kurt Inge |
author_facet |
Miljeteig, Kurt Inge |
author_sort |
Miljeteig, Kurt Inge |
title |
Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
title_short |
Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
title_full |
Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
title_fullStr |
Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
title_full_unstemmed |
Late Triassic (early Carnian) palynology of the shallow stratigraphic core 7830/3-U-1, offshore Kong Karls Land, Northern Barents Sea |
title_sort |
late triassic (early carnian) palynology of the shallow stratigraphic core 7830/3-u-1, offshore kong karls land, northern barents sea |
publisher |
The University of Bergen |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12654 |
long_lat |
ENVELOPE(16.368,16.368,78.296,78.296) ENVELOPE(28.000,28.000,78.833,78.833) |
geographic |
Arctic Barents Sea Bergen De Geerdalen Kong Karls Land |
geographic_facet |
Arctic Barents Sea Bergen De Geerdalen Kong Karls Land |
genre |
Arctic Barents Sea Kong Karls Land |
genre_facet |
Arctic Barents Sea Kong Karls Land |
op_relation |
https://hdl.handle.net/1956/12654 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766333920017645568 |