Resolution of regional fluid flow related to successive orogenic events on the Laurentian margin

Mark, Darren F.; Parnell, John; Kelley, Simon P. and Sherlock, Sarah C. (2007). Resolution of regional fluid flow related to successive orogenic events on the Laurentian margin. Geology, 35(6), pp. 547–550.

URL:	http://geology.geoscienceworld.org/cgi/content/abs...
DOI (Digital Object Identifier) Link:	http://dx.doi.org/doi:10.1130/G23388A.1
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Abstract

Seven localities distributed along a 180-km-long outcrop within the UK sector of the Laurentian margin were sampled, and all showed two phases of authigenic K-feldspar. The first phase was precipitated from a cool fluid of moderate salinity, and the second phase was precipitated from a hotter, more saline fluid. Ar-Ar ages for the two episodes of authigenesis are ca. 470 Ma and ca. 432 Ma. The data can be interpreted to represent two phases of regional-scale fluid migration related to Ordovician arc accretion and Silurian continent-continent convergence, corresponding to the Grampian and Scandian episodes of the Caledonian orogeny, respectively.

Item Type:	Journal Article
ISSN:	0091-7613
Keywords:	authigenic K-feldspar; fluid flow; Caledonian orogeny; Fucoid Beds;
Academic Unit/Department:	Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID:	10609
Depositing User:	Users 2315 not found.
Date Deposited:	17 Apr 2008
Last Modified:	02 Dec 2010 20:07
URI:	http://oro.open.ac.uk/id/eprint/10609

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