Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland
Petrographic analysis combined with X-ray diffraction are used to identify the diagenetic changes that have affected the porosity and permeability of gravity-flow sandstones of the Oxfordian–Volgian Hareelv Formation in the cored Blokelv-1 borehole in Jameson Land. Kaolinite replacement of albite gr...
Published in: | Geological Survey of Denmark and Greenland Bulletin |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Geological Survey of Denmark and Greenland (GEUS)
2018
|
Subjects: | |
Online Access: | https://geusbulletin.org/index.php/geusb/article/view/4310 https://doi.org/10.34194/geusb.v42.4310 |
id |
ftjgeusbullet:oai:geusjournals.org:article/4310 |
---|---|
record_format |
openpolar |
spelling |
ftjgeusbullet:oai:geusjournals.org:article/4310 2024-09-15T18:04:16+00:00 Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland Olivarius, Mette Weibel, Rikke Schovsbo, Niels H. Olsen, Dan Kjøller, Claus 2018-12-28 application/pdf https://geusbulletin.org/index.php/geusb/article/view/4310 https://doi.org/10.34194/geusb.v42.4310 eng eng Geological Survey of Denmark and Greenland (GEUS) https://geusbulletin.org/index.php/geusb/article/view/4310/10065 https://geusbulletin.org/index.php/geusb/article/view/4310 doi:10.34194/geusb.v42.4310 GEUS Bulletin; Vol. 42 (2018): Petroleum geology of the Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Blokelv-1 borehole, Jameson Land Basin; 65-84 2597-2154 2597-2162 10.34194/geusb.v42 East Greenland Hareelv Formation Katedralen and Sjællandselv Members Oxfordian–Kimmeridgian petrography mineralogy reservoir quality info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article. 2018 ftjgeusbullet https://doi.org/10.34194/geusb.v42.431010.34194/geusb.v42 2024-08-06T03:03:36Z Petrographic analysis combined with X-ray diffraction are used to identify the diagenetic changes that have affected the porosity and permeability of gravity-flow sandstones of the Oxfordian–Volgian Hareelv Formation in the cored Blokelv-1 borehole in Jameson Land. Kaolinite replacement of albite grains probably occurred early after deposition and microquartz coatings formed under shallow burial. At deeper burial, illite and quartz formed from kaolinite and K-feldspar. Pervasive ankerite cement formed in the finest grained sandstones and may have formed at the expense of early calcite cement. Quartz overgrowths are volumetrically small, partly due to inhibition by microquartz coatings and partly due to limited residence time during deep burial. The succession reached the maximum burial depth of c. 2.8 km during the late Eocene. Basaltic material was intruded into the sediments during the early Eocene and the enhanced heat flow accelerated diagenesis in the close vicinity of the intrusions, which have thicknesses of up to 2 m. Most of the sandstones have porosities between 14.4 and 25.7% and permeabilities between 0.4 and 411.9 mD; this variation resulted from a combination of microquartz coatings and clay minerals. However, the intrusion-influenced sandstones and the ankerite-cemented sandstones have lower porosity and permeability. Article in Journal/Newspaper East Greenland Greenland GEUS Bulletin (Geological Survey of Denmark and Greenland) Geological Survey of Denmark and Greenland Bulletin 42 65 84 |
institution |
Open Polar |
collection |
GEUS Bulletin (Geological Survey of Denmark and Greenland) |
op_collection_id |
ftjgeusbullet |
language |
English |
topic |
East Greenland Hareelv Formation Katedralen and Sjællandselv Members Oxfordian–Kimmeridgian petrography mineralogy reservoir quality |
spellingShingle |
East Greenland Hareelv Formation Katedralen and Sjællandselv Members Oxfordian–Kimmeridgian petrography mineralogy reservoir quality Olivarius, Mette Weibel, Rikke Schovsbo, Niels H. Olsen, Dan Kjøller, Claus Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
topic_facet |
East Greenland Hareelv Formation Katedralen and Sjællandselv Members Oxfordian–Kimmeridgian petrography mineralogy reservoir quality |
description |
Petrographic analysis combined with X-ray diffraction are used to identify the diagenetic changes that have affected the porosity and permeability of gravity-flow sandstones of the Oxfordian–Volgian Hareelv Formation in the cored Blokelv-1 borehole in Jameson Land. Kaolinite replacement of albite grains probably occurred early after deposition and microquartz coatings formed under shallow burial. At deeper burial, illite and quartz formed from kaolinite and K-feldspar. Pervasive ankerite cement formed in the finest grained sandstones and may have formed at the expense of early calcite cement. Quartz overgrowths are volumetrically small, partly due to inhibition by microquartz coatings and partly due to limited residence time during deep burial. The succession reached the maximum burial depth of c. 2.8 km during the late Eocene. Basaltic material was intruded into the sediments during the early Eocene and the enhanced heat flow accelerated diagenesis in the close vicinity of the intrusions, which have thicknesses of up to 2 m. Most of the sandstones have porosities between 14.4 and 25.7% and permeabilities between 0.4 and 411.9 mD; this variation resulted from a combination of microquartz coatings and clay minerals. However, the intrusion-influenced sandstones and the ankerite-cemented sandstones have lower porosity and permeability. |
format |
Article in Journal/Newspaper |
author |
Olivarius, Mette Weibel, Rikke Schovsbo, Niels H. Olsen, Dan Kjøller, Claus |
author_facet |
Olivarius, Mette Weibel, Rikke Schovsbo, Niels H. Olsen, Dan Kjøller, Claus |
author_sort |
Olivarius, Mette |
title |
Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
title_short |
Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
title_full |
Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
title_fullStr |
Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
title_full_unstemmed |
Diagenesis of Upper Jurassic sandstones of the Blokelv-1 core in the Jameson Land Basin, East Greenland |
title_sort |
diagenesis of upper jurassic sandstones of the blokelv-1 core in the jameson land basin, east greenland |
publisher |
Geological Survey of Denmark and Greenland (GEUS) |
publishDate |
2018 |
url |
https://geusbulletin.org/index.php/geusb/article/view/4310 https://doi.org/10.34194/geusb.v42.4310 |
genre |
East Greenland Greenland |
genre_facet |
East Greenland Greenland |
op_source |
GEUS Bulletin; Vol. 42 (2018): Petroleum geology of the Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Blokelv-1 borehole, Jameson Land Basin; 65-84 2597-2154 2597-2162 10.34194/geusb.v42 |
op_relation |
https://geusbulletin.org/index.php/geusb/article/view/4310/10065 https://geusbulletin.org/index.php/geusb/article/view/4310 doi:10.34194/geusb.v42.4310 |
op_doi |
https://doi.org/10.34194/geusb.v42.431010.34194/geusb.v42 |
container_title |
Geological Survey of Denmark and Greenland Bulletin |
container_volume |
42 |
container_start_page |
65 |
op_container_end_page |
84 |
_version_ |
1810441762478489600 |