Finlay, Alex J, Wray, David ORCID: 0000-0002-0799-2730, Comfort, Guy and Moore, Julian K (2023) Radioactive heat production variations in the Faroe-Shetland Basin: key new heat production, geological and geochronological data for regional and local basin modelling. Petroleum Geoscience:2022-039. ISSN 1354-0793 (Print), 2041-496X (Online) (doi:https://doi.org/10.1144/petgeo2022-039)

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Abstract

This study presents the results of a joint Chemostrat – APT study that aimed to produce a suite of Radioactive Heat Production (RHP) data for basement rocks in the Faroe Shetland Basin to enable more accurate basin modelling to be undertaken. To enable regional studies to be undertaken, the basement has been split into four zones based on similarities. Zone A is formed of high grade metamorphic basement from the Rockall trough (quads 154 & 164) southwest of the “Laxfordian front” postulated by Holdsworth et al., (2019). Zone B comprises granodioritic, tonalitic and dioritic Neoarchean aged (2700-2830 Ma) high grade metamorphic basement from the southwest of the Rona Ridge and Basin (wells 202/08-1, 204/15-2, 205/161, 205/21-1A, 206/7a-2, 206/08-2, 206/09-2 and 206/12-1) and northeast of the Laxfordian front. Zone C contains Neoarchean aged high grade metamorphic basement of a predominantly granitic and quartz rich granitoid composition from the northeast of the Rona Ridge (wells 207/01-3, 207/02-1, 208/23-1 and 208/26-1). Zone D differs from the rest of the material in this study in that it is Caledonian (~460 Ma) granitic plutonic basement from Quads 209 (Ereland volcanic centre). Radioactive heat production values were derived from Potassium, Thorium and Uranium data produced from the analysis of eighty-four basement samples by ICP-OES and ICP-MS analysis. Each mapped basement zone was then assigned a mean radioactive heat production value for use in future basin modelling studies; Zone A = 0.21 μWm3, Zone B, 0.64 μWm3, zone C = 0.88 μWm3 and zone D = 2.1 μWm3.

Item Type:	Article
Additional Information:	Supplementary material: https://doi.org/10.6084/m9.figshare.c.6771540. Thematic collection: This article is part of the UKCS Atlantic Margin collection available at: https://www.lyellcollection.org/topic/collections/new-learning-from-exploration-and-development-in-the-ukcs-atlantic-margin.
Uncontrolled Keywords:	Faroe Shetland Basin; petroleum system; heat flow; Pb-U geochronology; basin modelling
Subjects:	Q Science > Q Science (General) Q Science > QA Mathematics > QA75 Electronic computers. Computer science Q Science > QE Geology
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Science (SCI)
Last Modified:	14 Aug 2023 14:13
URI:	http://gala.gre.ac.uk/id/eprint/43705

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