Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6442410 | Precambrian Research | 2011 | 13 Pages |
Abstract
We also report a young, highly imprecise Re-Os age (310 ± 110 Ma) for the Early Cambrian Leny Limestone Formation which is constrained biostratigraphically by a polymerid and miomerid trilobite fauna. We suggest, based on the mineralogy of the Leny Limestone, (kaolinite, muscovite and a serpentine group mineral, berthierine), that the Re-Os systematics have been disturbed by post-depositional fluid flow associated with Palaeozoic igneous intrusions. However, it is evident from the Ballachulish Slate Formation results that anhydrous metamorphism does not disturb the Re-Os geochronometer.
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Authors
Alan D. Rooney, David M. Chew, David Selby,