The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators
Despite decades of research on organic matter deposition, alteration, and preservation, the processes affecting and altering organic matter at low maturity are relatively poorly understood. Processes that affect deposition of organic matter, such as wildfires, or influence its preservation after dep...
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ftunivcalgary:oai:prism.ucalgary.ca:1880/113766 2023-08-27T04:07:48+02:00 The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators Synnott, Dane Patrick Pedersen, Per Kent Dewing, Keith Fowler, Martin Sanei, Hamed Larter, Stephen Curiale, Joseph 2021-08-19 application/pdf application/vnd.ms-excel http://hdl.handle.net/1880/113766 https://doi.org/10.11575/PRISM/39120 eng eng Science University of Calgary Synnott, D. P. (2021). The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators (Unpublished doctoral thesis). University of Calgary, Calgary, AB. http://dx.doi.org/10.11575/PRISM/39120 http://hdl.handle.net/1880/113766 University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. Organic Geochemistry Diagenesis Organic Petrology Thermal Maturity Geochemistry Geology doctoral thesis 2021 ftunivcalgary https://doi.org/10.11575/PRISM/39120 2023-08-06T06:34:28Z Despite decades of research on organic matter deposition, alteration, and preservation, the processes affecting and altering organic matter at low maturity are relatively poorly understood. Processes that affect deposition of organic matter, such as wildfires, or influence its preservation after deposition, such as diagenetic clay catalyzed transformation, can reduce the reliability of commonly applied thermal maturity proxies. This thesis integrated organic geochemistry and petrographic examination of samples from the Upper Cretaceous in Western Canada and the Canadian Arctic Islands to better understand processes that altered organic matter during deposition and early diagenetic. Samples from the Upper Cretaceous Kanguk Formation of the Canadian Arctic Islands have abundances of pyrogenic polycyclic aromatic hydrocarbon compounds and combustion-related organic macerals that show a distinct trend of increasing wildfire influence from the Turonian to the Campanian. This trend corresponds with increasing amounts of terrigenous organic matter in the marine Sverdrup Basin, in addition to increasing angiosperm-derived biomarkers. High rates of terrigenous organic matter deposition, accelerated by wildfires, have an important impact on the preservation of organic matter in a marine basin, as observed through degradation trends correlated to elevated primary productivity. A stratigraphically-controlled thermal maturity transect of samples ranging from eogenesis up to the peak of catagenesis was collected from the Upper Cretaceous Western Canadian Sedimentary Basin and examined using integrated organic geochemistry and organic petrology. The diagenetic transformation of hopanoid and steroid compounds was investigated, and key chemical transformations were calibrated to a maturity level. This investigation demonstrated that early clay-catalyzed backbone rearrangement in both hopanoid and steroid compounds has a profound impact on the hopanoid and steroid composition at higher maturity levels as well as on commonly ... Doctoral or Postdoctoral Thesis Arctic sverdrup basin PRISM - University of Calgary Digital Repository Arctic Canada |
institution |
Open Polar |
collection |
PRISM - University of Calgary Digital Repository |
op_collection_id |
ftunivcalgary |
language |
English |
topic |
Organic Geochemistry Diagenesis Organic Petrology Thermal Maturity Geochemistry Geology |
spellingShingle |
Organic Geochemistry Diagenesis Organic Petrology Thermal Maturity Geochemistry Geology Synnott, Dane Patrick The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
topic_facet |
Organic Geochemistry Diagenesis Organic Petrology Thermal Maturity Geochemistry Geology |
description |
Despite decades of research on organic matter deposition, alteration, and preservation, the processes affecting and altering organic matter at low maturity are relatively poorly understood. Processes that affect deposition of organic matter, such as wildfires, or influence its preservation after deposition, such as diagenetic clay catalyzed transformation, can reduce the reliability of commonly applied thermal maturity proxies. This thesis integrated organic geochemistry and petrographic examination of samples from the Upper Cretaceous in Western Canada and the Canadian Arctic Islands to better understand processes that altered organic matter during deposition and early diagenetic. Samples from the Upper Cretaceous Kanguk Formation of the Canadian Arctic Islands have abundances of pyrogenic polycyclic aromatic hydrocarbon compounds and combustion-related organic macerals that show a distinct trend of increasing wildfire influence from the Turonian to the Campanian. This trend corresponds with increasing amounts of terrigenous organic matter in the marine Sverdrup Basin, in addition to increasing angiosperm-derived biomarkers. High rates of terrigenous organic matter deposition, accelerated by wildfires, have an important impact on the preservation of organic matter in a marine basin, as observed through degradation trends correlated to elevated primary productivity. A stratigraphically-controlled thermal maturity transect of samples ranging from eogenesis up to the peak of catagenesis was collected from the Upper Cretaceous Western Canadian Sedimentary Basin and examined using integrated organic geochemistry and organic petrology. The diagenetic transformation of hopanoid and steroid compounds was investigated, and key chemical transformations were calibrated to a maturity level. This investigation demonstrated that early clay-catalyzed backbone rearrangement in both hopanoid and steroid compounds has a profound impact on the hopanoid and steroid composition at higher maturity levels as well as on commonly ... |
author2 |
Pedersen, Per Kent Dewing, Keith Fowler, Martin Sanei, Hamed Larter, Stephen Curiale, Joseph |
format |
Doctoral or Postdoctoral Thesis |
author |
Synnott, Dane Patrick |
author_facet |
Synnott, Dane Patrick |
author_sort |
Synnott, Dane Patrick |
title |
The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
title_short |
The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
title_full |
The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
title_fullStr |
The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
title_full_unstemmed |
The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
title_sort |
impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators |
publisher |
Science |
publishDate |
2021 |
url |
http://hdl.handle.net/1880/113766 https://doi.org/10.11575/PRISM/39120 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic sverdrup basin |
genre_facet |
Arctic sverdrup basin |
op_relation |
Synnott, D. P. (2021). The impact of organic matter deposition and pre-oil window diagenetic transformation on commonly utilized thermal maturity indicators (Unpublished doctoral thesis). University of Calgary, Calgary, AB. http://dx.doi.org/10.11575/PRISM/39120 http://hdl.handle.net/1880/113766 |
op_rights |
University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. |
op_doi |
https://doi.org/10.11575/PRISM/39120 |
_version_ |
1775348511178489856 |