Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data
The Lower Cretaceous succession in Svalbard is commonly considered as an important analogue to age-equivalent strata on the Barents Shelf which are sporadically targeted by exploration wells. In this study, the stratigraphic and genetic relationship between the Rurikfjellet (open marine), Helvetiafj...
Published in: | Norwegian Journal of Geology |
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Language: | English |
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Norsk Geologisk Forening
2019
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Online Access: | https://hdl.handle.net/1956/22782 https://doi.org/10.17850/njg006 |
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ftunivbergen:oai:bora.uib.no:1956/22782 2023-05-15T17:24:13+02:00 Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data Grundvåg, Sten-Andreas Jelby, Mads Engholm Śliwińska, Kasia Kamila Nøhr-Hansen, Henrik Aadland, Tore Sandvik, Sara Elvelund Tennvassås, Ingrid Engen, Thea Marie Olaussen, Snorre 2019-11-06T07:01:07Z application/pdf https://hdl.handle.net/1956/22782 https://doi.org/10.17850/njg006 eng eng Norsk Geologisk Forening Norges forskningsråd: 228107 urn:issn:2387-5844 urn:issn:2387-5852 https://hdl.handle.net/1956/22782 https://doi.org/10.17850/njg006 cristin:1734222 Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright 2019 The Author(s) Norwegian Journal of Geology Svalbard northern Barents Shelf Mesozoic Early Cretaceous palaeogeography Facies analysis Sequence stratigraphy Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.17850/njg006 2023-03-14T17:43:45Z The Lower Cretaceous succession in Svalbard is commonly considered as an important analogue to age-equivalent strata on the Barents Shelf which are sporadically targeted by exploration wells. In this study, the stratigraphic and genetic relationship between the Rurikfjellet (open marine), Helvetiafjellet (paralic) and Carolinefjellet (open marine) formations of the Lower Cretaceous succession in Svalbard is evaluated by combining sedimentological outcrop studies with well log and core data across Nordenskiöld Land, central Spitsbergen. Sedimentological characteristics and stratigraphic units are mapped within a refined dinocyst biostratigraphic framework, enabling relatively well-constrained palaeogeographic reconstructions. The Valanginian–lowermost Barremian Rurikfjellet Formation consists of a lower shale-dominated unit of offshore origin which grades upwards into storm-reworked lower shoreface sandstones displaying hummocky cross-stratification. Local occurrences of prodeltaic successions and thick successions of gravity flow deposits containing coal-bearing slump blocks of delta plain origin in some wells, reveal a late Hauterivian progradational pulse which has previously not been recorded in Svalbard. The lower Barremian– lower Aptian Helvetiafjellet Formation consists of fluvial braidplain and paralic deposits which rest unconformably on the Rurikfjellet Formation across the entire study area, reflecting regional uplift and widespread subaerial exposure prior to the onset of paralic deposition. The Helvetiafjellet Formation exhibits increased marine influence upwards, and in the investigated cores the uppermost part of the unit consists of wave-reworked mouth-bar deposits which are truncated by a transgressive conglomerate lag dominated by extrabasinal lithic clasts and intraformational siderite clasts. An up to 10 m-thick, regionally extensive, organic-rich (TOC up to 2.1 wt.%) shale unit of early Aptian age marks the base of the overlying Carolinefjellet Formation. The shale accumulated during a ... Article in Journal/Newspaper Nordenskiöld Land Svalbard Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Carolinefjellet ENVELOPE(15.850,15.850,78.300,78.300) Helvetiafjellet ENVELOPE(16.232,16.232,78.213,78.213) Nordenskiöld Land ENVELOPE(15.000,15.000,77.833,77.833) Rurikfjellet ENVELOPE(18.217,18.217,77.983,77.983) Svalbard Norwegian Journal of Geology |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Svalbard northern Barents Shelf Mesozoic Early Cretaceous palaeogeography Facies analysis Sequence stratigraphy |
spellingShingle |
Svalbard northern Barents Shelf Mesozoic Early Cretaceous palaeogeography Facies analysis Sequence stratigraphy Grundvåg, Sten-Andreas Jelby, Mads Engholm Śliwińska, Kasia Kamila Nøhr-Hansen, Henrik Aadland, Tore Sandvik, Sara Elvelund Tennvassås, Ingrid Engen, Thea Marie Olaussen, Snorre Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
topic_facet |
Svalbard northern Barents Shelf Mesozoic Early Cretaceous palaeogeography Facies analysis Sequence stratigraphy |
description |
The Lower Cretaceous succession in Svalbard is commonly considered as an important analogue to age-equivalent strata on the Barents Shelf which are sporadically targeted by exploration wells. In this study, the stratigraphic and genetic relationship between the Rurikfjellet (open marine), Helvetiafjellet (paralic) and Carolinefjellet (open marine) formations of the Lower Cretaceous succession in Svalbard is evaluated by combining sedimentological outcrop studies with well log and core data across Nordenskiöld Land, central Spitsbergen. Sedimentological characteristics and stratigraphic units are mapped within a refined dinocyst biostratigraphic framework, enabling relatively well-constrained palaeogeographic reconstructions. The Valanginian–lowermost Barremian Rurikfjellet Formation consists of a lower shale-dominated unit of offshore origin which grades upwards into storm-reworked lower shoreface sandstones displaying hummocky cross-stratification. Local occurrences of prodeltaic successions and thick successions of gravity flow deposits containing coal-bearing slump blocks of delta plain origin in some wells, reveal a late Hauterivian progradational pulse which has previously not been recorded in Svalbard. The lower Barremian– lower Aptian Helvetiafjellet Formation consists of fluvial braidplain and paralic deposits which rest unconformably on the Rurikfjellet Formation across the entire study area, reflecting regional uplift and widespread subaerial exposure prior to the onset of paralic deposition. The Helvetiafjellet Formation exhibits increased marine influence upwards, and in the investigated cores the uppermost part of the unit consists of wave-reworked mouth-bar deposits which are truncated by a transgressive conglomerate lag dominated by extrabasinal lithic clasts and intraformational siderite clasts. An up to 10 m-thick, regionally extensive, organic-rich (TOC up to 2.1 wt.%) shale unit of early Aptian age marks the base of the overlying Carolinefjellet Formation. The shale accumulated during a ... |
format |
Article in Journal/Newspaper |
author |
Grundvåg, Sten-Andreas Jelby, Mads Engholm Śliwińska, Kasia Kamila Nøhr-Hansen, Henrik Aadland, Tore Sandvik, Sara Elvelund Tennvassås, Ingrid Engen, Thea Marie Olaussen, Snorre |
author_facet |
Grundvåg, Sten-Andreas Jelby, Mads Engholm Śliwińska, Kasia Kamila Nøhr-Hansen, Henrik Aadland, Tore Sandvik, Sara Elvelund Tennvassås, Ingrid Engen, Thea Marie Olaussen, Snorre |
author_sort |
Grundvåg, Sten-Andreas |
title |
Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
title_short |
Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
title_full |
Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
title_fullStr |
Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
title_full_unstemmed |
Sedimentology and palynology of the Lower Cretaceous succession of central Spitsbergen: integration of subsurface and outcrop data |
title_sort |
sedimentology and palynology of the lower cretaceous succession of central spitsbergen: integration of subsurface and outcrop data |
publisher |
Norsk Geologisk Forening |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/22782 https://doi.org/10.17850/njg006 |
long_lat |
ENVELOPE(15.850,15.850,78.300,78.300) ENVELOPE(16.232,16.232,78.213,78.213) ENVELOPE(15.000,15.000,77.833,77.833) ENVELOPE(18.217,18.217,77.983,77.983) |
geographic |
Carolinefjellet Helvetiafjellet Nordenskiöld Land Rurikfjellet Svalbard |
geographic_facet |
Carolinefjellet Helvetiafjellet Nordenskiöld Land Rurikfjellet Svalbard |
genre |
Nordenskiöld Land Svalbard Spitsbergen |
genre_facet |
Nordenskiöld Land Svalbard Spitsbergen |
op_source |
Norwegian Journal of Geology |
op_relation |
Norges forskningsråd: 228107 urn:issn:2387-5844 urn:issn:2387-5852 https://hdl.handle.net/1956/22782 https://doi.org/10.17850/njg006 cristin:1734222 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright 2019 The Author(s) |
op_doi |
https://doi.org/10.17850/njg006 |
container_title |
Norwegian Journal of Geology |
_version_ |
1766115160984911872 |