Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6442269 | Precambrian Research | 2014 | 76 Pages |
Abstract
Spinel lherzolite mantle xenoliths from the Isle of Lewis offer direct insight into the lithospheric mantle below this region. They display similar geochemical 'enrichments' and 'depletions' observed in the Scourie Dykes and the magma source is thus considered to reside primarily in the sub-continental lithospheric mantle (SCLM), with some potential contribution from asthenospheric melts. Platinum Group Element geochemistry and trace element modelling indicate that the dolerite dykes were formed by moderate (<15%) partial melting of the source, whilst higher degrees of partial melting led to the formation of picritic and olivine gabbro suites. Magma production was triggered by significant crustal and lithospheric extension, causing both asthenospheric and substantial lithospheric melting.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Hannah S.R. Hughes, Iain McDonald, Kathryn M. Goodenough, T. Jake R. Ciborowski, Andrew C. Kerr, Joshua H.F.L. Davies, David Selby,