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Geology covers multiple disciplines and substantial territory in April's new postings
Date:4/18/2013

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The architecture of the European-Mediterranean lithosphere: A synthesis of the Re-Os evidence
Jos M. Gonzlez-Jimnez et al., ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS), and GEMOC, Department of Earth and Planetary Sciences, Macquarie University, Sydney, NSW 2109, Australia. Published online ahead of print on 4 April; http://dx.doi.org/10.1130/G34003.1.

Rhenium-depletion model ages (TRD) of sulfides in peridotite xenoliths from the subcontinental mantle beneath central Spain (the Calatrava volcanic field) reveal that episodes of mantle magmatism and/or metasomatism in the Iberia microplate were linked to crustal growth events, mainly during supercontinent assembly and/or breakup about 1.8, 1.1, 0.9, 0.6, and 0.3 billion years ago. A synthesis of available in situ and whole-rock Os-isotope data on mantle derived peridotites shows that this type of mantle (maximum TRD of ca. 1.8 Ga) is widespread in the subcontinental mantle of Europe and Africa outboard from the Betics-Maghrebides-Appenines front. In contrast, the mantle enclosed within the Alpine domain records TRD as old as 2.6 Ga, revealing a previously unrecognized Archean domain or domains in the central and western Mediterranean. Observations presented here indicate that ancient fra
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Contact: Kea Giles
kgiles@geosociety.org
Geological Society of America
Source:Eurekalert

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