Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen
ABSTRACT: Ball−shaped concretions (“cannon balls”) commonly occur in a marine, or− ganic carbon−rich sedimentary sequence (Innkjegla Member) of the Carolinefjellet Forma− tion (Aptian–Albian) in Spitsbergen. The sedimentologic, petrographic and geochemical investigation of these concretions in the K...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.500.8536 2023-05-15T15:07:45+02:00 Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen Krzysztof P. Krajewski Bartłomiej Luks Instytut Nauk Geologicznych Pan The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.8536 http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.8536 http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf Key words Arctic Svalbard Lower Cretaceous “cannon−ball ” concretions diagenesis. I text ftciteseerx 2016-01-08T09:07:44Z ABSTRACT: Ball−shaped concretions (“cannon balls”) commonly occur in a marine, or− ganic carbon−rich sedimentary sequence (Innkjegla Member) of the Carolinefjellet Forma− tion (Aptian–Albian) in Spitsbergen. The sedimentologic, petrographic and geochemical investigation of these concretions in the Kapp Morton section at Van Mijenfjorden gives in− sight into their origin and diagenetic evolution. The concretion bodies commenced to form in subsurface environment in the upper part of the sulphate reduction (SR) diagenetic zone. They resulted from pervasive cementation of uncompacted sediment enriched in frambo− idal pyrite by non−ferroan (up to 2 mol % FeCO3) calcite microspar at local sites of enhanced decomposition of organic matter. Bacterial oxidation of organic matter provided most of carbon dioxide necessary for concretionary calcite precipitation (13CCaCO3 –21 ‰ VPDB). Perfect ball−like shapes of the concretions originated at this stage, reflecting isotropic per− meability of uncompacted sediment. The concretion bodies cracked under continuous burial as a result of amplification of stress around concretions in a more plastic sediment. The crack systems were filled by non−ferroan (up to 5 mol % FeCO3) calcite spar and blocky pyrite in deeper parts of the SR−zone. This cementation was associated with impregnation Text Arctic Svalbard Van Mijenfjorden Spitsbergen Unknown Arctic Carolinefjellet ENVELOPE(15.850,15.850,78.300,78.300) Innkjegla ENVELOPE(17.179,17.179,78.019,78.019) Kapp Morton ENVELOPE(14.869,14.869,77.787,77.787) Morton ENVELOPE(-61.220,-61.220,-62.697,-62.697) Svalbard Van Mijenfjorden ENVELOPE(14.667,14.667,77.717,77.717) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Key words Arctic Svalbard Lower Cretaceous “cannon−ball ” concretions diagenesis. I |
spellingShingle |
Key words Arctic Svalbard Lower Cretaceous “cannon−ball ” concretions diagenesis. I Krzysztof P. Krajewski Bartłomiej Luks Instytut Nauk Geologicznych Pan Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
topic_facet |
Key words Arctic Svalbard Lower Cretaceous “cannon−ball ” concretions diagenesis. I |
description |
ABSTRACT: Ball−shaped concretions (“cannon balls”) commonly occur in a marine, or− ganic carbon−rich sedimentary sequence (Innkjegla Member) of the Carolinefjellet Forma− tion (Aptian–Albian) in Spitsbergen. The sedimentologic, petrographic and geochemical investigation of these concretions in the Kapp Morton section at Van Mijenfjorden gives in− sight into their origin and diagenetic evolution. The concretion bodies commenced to form in subsurface environment in the upper part of the sulphate reduction (SR) diagenetic zone. They resulted from pervasive cementation of uncompacted sediment enriched in frambo− idal pyrite by non−ferroan (up to 2 mol % FeCO3) calcite microspar at local sites of enhanced decomposition of organic matter. Bacterial oxidation of organic matter provided most of carbon dioxide necessary for concretionary calcite precipitation (13CCaCO3 –21 ‰ VPDB). Perfect ball−like shapes of the concretions originated at this stage, reflecting isotropic per− meability of uncompacted sediment. The concretion bodies cracked under continuous burial as a result of amplification of stress around concretions in a more plastic sediment. The crack systems were filled by non−ferroan (up to 5 mol % FeCO3) calcite spar and blocky pyrite in deeper parts of the SR−zone. This cementation was associated with impregnation |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Krzysztof P. Krajewski Bartłomiej Luks Instytut Nauk Geologicznych Pan |
author_facet |
Krzysztof P. Krajewski Bartłomiej Luks Instytut Nauk Geologicznych Pan |
author_sort |
Krzysztof P. Krajewski |
title |
Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
title_short |
Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
title_full |
Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
title_fullStr |
Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
title_full_unstemmed |
Origin of “cannon−ball ” concretions in the Carolinefjellet Formation (Lower Cretaceous), Spitsbergen |
title_sort |
origin of “cannon−ball ” concretions in the carolinefjellet formation (lower cretaceous), spitsbergen |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.8536 http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf |
long_lat |
ENVELOPE(15.850,15.850,78.300,78.300) ENVELOPE(17.179,17.179,78.019,78.019) ENVELOPE(14.869,14.869,77.787,77.787) ENVELOPE(-61.220,-61.220,-62.697,-62.697) ENVELOPE(14.667,14.667,77.717,77.717) |
geographic |
Arctic Carolinefjellet Innkjegla Kapp Morton Morton Svalbard Van Mijenfjorden |
geographic_facet |
Arctic Carolinefjellet Innkjegla Kapp Morton Morton Svalbard Van Mijenfjorden |
genre |
Arctic Svalbard Van Mijenfjorden Spitsbergen |
genre_facet |
Arctic Svalbard Van Mijenfjorden Spitsbergen |
op_source |
http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.500.8536 http://www.polish.polar.pan.pl/ppr24/ppr24-217.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766339184414425088 |