Dear John,
My PhD thesis has concentrated on the structure and magma flow of cone sheets/dykes (theres very little difference between the two in field) on Ardnamurchan. In some areas you can get a very good grasp of the geometries of the intrusions and theres a wide range of different behaviours depending on the host rock (e.g. broken bridges similar to that shown in Zoe's photo; others show evidence of host rock fluidisation). I also have quite a lot of AMS (anisotropy of magnetic susceptibility) data for the intrusions to look at the magma flow. All in all, theres a lot of variation in a small area and the exposures are pretty decent (though probably not as good as elsewhere).
All the best with the search,
Craig
E-mail: [log in to unmask]
Tel: 0121 414 6146
Address: School of Geography, Earth and Environmental Sciences
The University of Birmingham
Edgbaston, Birmingham
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http://www.gees.bham.ac.uk/staff/pgcxm477.shtml
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From: Tectonics & structural geology discussion list [[log in to unmask]] on behalf of John F. Dewey [[log in to unmask]]
Sent: 12 September 2011 15:33
To: [log in to unmask]
Subject: Re: Mafic dykes
>_Dear Colleagues,
I am seeking out 100% exposed marine rock platforms where mafic dykes
and their wall structures, and, ideally, relay/transform offsets, and
terminations can be studied. I am seeking places where dykes were
injected laterally away from volcanic centres and places where dykes
were injected vertically beneath volcanic centres. I have visited a
few spots in Arran, Mull, and Skye but I am looking for a lot more.
Any help and suggestions will be greatly appreciated.
Best wishes,
John
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Prof. John F. Dewey FRS, M.R.I.A., FAA, Mem. Acad. Eur., Mem.
US Nat. Acad. Sci., Distinguished Emeritus Professor University of
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College Oxford.
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