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The origin of a Pre-Cambrian diorite-granite plutonic series from Pembrokeshire (Wales)
Published online by Cambridge University Press: 01 May 2009
Summary
A series of dioritic, granodioritic and granitic igneous rocks, of Pre-Cambrian age, is exposed near Johnston in south Pembrokeshire. Chemical analyses of representative rocks show the suite to be of calcalkaline type. An origin is suggested involving magmatic differentiation of a diorite parent magma, and the granitic rocks are compared with a granophyre of similar composition in north Pembrokeshire.
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