Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen
The earliest Triassic Barents Sea Basin received sediments from three sedimentary systems. Of these, the Fennoscandian and the Uralian systems have been well studied highlighting their sedimentology, provenance, extent and reservoir parameters. Contrarily, the system originating from Greenland/Arcti...
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The University of Bergen
2017
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ftunivbergen:oai:bora.uib.no:1956/17201 2023-05-15T15:12:32+02:00 Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen Solvang, Ole-Marius Hafstad 2017-12-05T23:00:02Z application/pdf https://hdl.handle.net/1956/17201 eng eng The University of Bergen https://hdl.handle.net/1956/17201 Copyright the Author. All rights reserved 756199 Master thesis 2017 ftunivbergen 2023-03-14T17:44:09Z The earliest Triassic Barents Sea Basin received sediments from three sedimentary systems. Of these, the Fennoscandian and the Uralian systems have been well studied highlighting their sedimentology, provenance, extent and reservoir parameters. Contrarily, the system originating from Greenland/Arctic Canada has received little attention and remains poorly constrained. This study has investigated the latter system by detailed sedimentological outcrop analysis of the Induan Vardebukta Formation on western Spitsbergen at Festningen, Selmaneset and Studentdalen. The composition and texture of collected sandstone samples have been investigated by thin section analysis, warranting a comparison to its synchronous deposits in the Barents Sea. Based on the sedimentological analysis, 6 facies associations are recognized; supratidal flats, tidal sandflats, tidally influenced channels, delta front deposits, offshore transition zone and prodelta deposits. These are interpreted to have been deposited in a mixed type delta as evidenced by the great variety of sedimentary processes, and the clear progradational signature. Furthermore, the depositional environment was characterized by extensive biogenic carbonate production with a storm and wave agitated shelf. Point counting of the sandstones reveals high mineralogical maturity whereas the textural observations do not, suggesting a short transport from a nearby sedimentary source area. Additionally, the sediments show evidence of deep burial prior to deposition expressed through the sutured grain shape and the relative abundance of quartzite grains. Also, a clear bimodal grain size distribution is found in one of the samples, implying that the Vardebukta Formation partially originates from two distinctive source areas. It is possible that the sudden influx of sediments in the Induan is linked to Late Paleozoic – Early Mesozoic tectonism, which at the time led to a general tectonic uplift of the uplands to the Barents Sea Basin. This was possibly due to the onset of rifting ... Master Thesis Arctic Barents Sea Fennoscandian Greenland Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Barents Sea Canada Greenland Selmaneset ENVELOPE(13.895,13.895,78.221,78.221) Studentdalen ENVELOPE(15.841,15.841,78.497,78.497) |
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Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
756199 |
spellingShingle |
756199 Solvang, Ole-Marius Hafstad Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
topic_facet |
756199 |
description |
The earliest Triassic Barents Sea Basin received sediments from three sedimentary systems. Of these, the Fennoscandian and the Uralian systems have been well studied highlighting their sedimentology, provenance, extent and reservoir parameters. Contrarily, the system originating from Greenland/Arctic Canada has received little attention and remains poorly constrained. This study has investigated the latter system by detailed sedimentological outcrop analysis of the Induan Vardebukta Formation on western Spitsbergen at Festningen, Selmaneset and Studentdalen. The composition and texture of collected sandstone samples have been investigated by thin section analysis, warranting a comparison to its synchronous deposits in the Barents Sea. Based on the sedimentological analysis, 6 facies associations are recognized; supratidal flats, tidal sandflats, tidally influenced channels, delta front deposits, offshore transition zone and prodelta deposits. These are interpreted to have been deposited in a mixed type delta as evidenced by the great variety of sedimentary processes, and the clear progradational signature. Furthermore, the depositional environment was characterized by extensive biogenic carbonate production with a storm and wave agitated shelf. Point counting of the sandstones reveals high mineralogical maturity whereas the textural observations do not, suggesting a short transport from a nearby sedimentary source area. Additionally, the sediments show evidence of deep burial prior to deposition expressed through the sutured grain shape and the relative abundance of quartzite grains. Also, a clear bimodal grain size distribution is found in one of the samples, implying that the Vardebukta Formation partially originates from two distinctive source areas. It is possible that the sudden influx of sediments in the Induan is linked to Late Paleozoic – Early Mesozoic tectonism, which at the time led to a general tectonic uplift of the uplands to the Barents Sea Basin. This was possibly due to the onset of rifting ... |
format |
Master Thesis |
author |
Solvang, Ole-Marius Hafstad |
author_facet |
Solvang, Ole-Marius Hafstad |
author_sort |
Solvang, Ole-Marius Hafstad |
title |
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
title_short |
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
title_full |
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
title_fullStr |
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
title_full_unstemmed |
Sedimentological and petrographical investigations of the Early Triassic Vardebukta Formation on western Spitsbergen |
title_sort |
sedimentological and petrographical investigations of the early triassic vardebukta formation on western spitsbergen |
publisher |
The University of Bergen |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/17201 |
long_lat |
ENVELOPE(13.895,13.895,78.221,78.221) ENVELOPE(15.841,15.841,78.497,78.497) |
geographic |
Arctic Barents Sea Canada Greenland Selmaneset Studentdalen |
geographic_facet |
Arctic Barents Sea Canada Greenland Selmaneset Studentdalen |
genre |
Arctic Barents Sea Fennoscandian Greenland Spitsbergen |
genre_facet |
Arctic Barents Sea Fennoscandian Greenland Spitsbergen |
op_relation |
https://hdl.handle.net/1956/17201 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766343206833750016 |