Dalradian Grampian Group affinity for the Bowmore Sandstone Group, Islay, SW Scotland
Whole-rock Sm-Nd model ages of 1601 Ma (lower Laggan Formation) and 1674 Ma (upper Blackrock Formation) suggest a late Palaeoproterozoic, early Mesoproterozoic source for the rnetasediments of the Bowmore Sandstone Group, central Islay, SW Scotland. In situ U-Pb detrital zircon (SIMS) analyses show that the group was deposited after 1003 Ma +/- 19 Ma in a basin dominated by Mesoproterozoic detritus, with some Palaeoproterozoic material and minimal Archaean input. The data are consistent with Laurentian sources, mostly Grenville (possibly including reworked sedimentary material from the southwestern Grenville Province), but with some input from Ketilidian, Labradorian, Pinwarian and Archaean terranes. Previous correlations with the Torridonian and the upper Dalradian are no longer tellable given the paucity of Archaean detritus in the Bowmore Sandstone Group. However, the data are comparable to parts of the Dalradian Grampian Group, in particular, the Glen Spean Subgroup (Upper Grampian Group, Strathtummel succession). It is proposed that the Bowmore Sandstone Group was deposited in an eastern Grampian Group basin, similar to the Strathtummel and Cromdale basins, which are also dominated by Grenville detritus.
Details
Publication status:
Published
Author(s):
Authors: McAteer, Claire A., Daly, J. Stephen, Flowerdew, Michael J., Whitehouse, Michael J.
This website uses cookies to improve your experience. We'll assume you're okay with this, but you can opt-out if you wish.AcceptRead more
Privacy & Cookies Policy
Privacy Overview
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.