Change search
ReferencesLink to record
Permanent link

Direct link
Sedimentology and Diagenesis of Upper Triassic Sandstones, with Emphasis on the Snadd-Fruholmen Transition, Barents Sea
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Geology and Mineral Resources Engineering.
2012 (English)MasteroppgaveStudent thesis
Abstract [en]

Triassic and Jurassic sediments from two cores in the Nordkapp Basin, Barents Sea, were analyzed by sedimentological, petrographic, SEM and XRD methods. The objective of the study was to gain better understanding of the depositional environments of the Upper Triassic-Jurassic, Snadd-, Fruholmen- and Stø formations with emphasis a mineralogical shift in the transition between the Snadd and Fruholmen formations, and try to relate the differences to depositional environment, climatic changes and diagenesis. The studied sediments of the Snadd and Fruholmen formations represent a transition from tidal flat, shoreline and inner shelf deposits. And the Stø Formation mainly represents inner shelf deposits, with exception of some fluvial deposits due to a local variation in one of the cores. The deposits represent an overall transgressive trend. The diagenetic processes differ in the three formations due to dissimilar depositional environment. In the Snadd Formation rhizocretions have been observed in combination with rootlets,and high levels of iron and manganese indicate influence by fresh-water. XRD analyses of mudstones showed no great compositional differences the Snadd and Fruholmen formations supporting observations from sandstone compositions of similar provenance and environment above and below the formation boundary. The largest compositional variation is seen between the Fruholmen and Stø formations, this is in accordance with other studies conducted in the Nordkapp Basin. The distinct increase in maturity may be due to extensive reworking connected with a regional transgression and sea-level rise.

Place, publisher, year, edition, pages
Institutt for geologi og bergteknikk , 2012. , 112 p.
Keyword [no]
ntnudaim:8153, MTPETR Petroleumsfag, Petroleumsgeologi
URN: urn:nbn:no:ntnu:diva-20110Local ID: ntnudaim:8153OAI: diva2:603571
Available from: 2013-02-06 Created: 2013-02-06

Open Access in DiVA

fulltext(9339 kB)840 downloads
File information
File name FULLTEXT01.pdfFile size 9339 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(184 kB)27 downloads
File information
File name COVER01.pdfFile size 184 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Geology and Mineral Resources Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 840 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 139 hits
ReferencesLink to record
Permanent link

Direct link