Petrological features of the Bodmin Moor granite, Cornwall

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Authors:Exley, C. S.
Author Affiliations:Primary:
University of Keele, Department of Earth Sciences, Keele, United Kingdom
Volume Title:Proceedings of the Ussher Society; research into the geology and geomorphology of South-West England
Volume Authors:Williams, Brian J., editor
Source:Proceedings of the Ussher Society, Vol.9(Part 1), p.85-90; 1996 annual conference of the Ussher Society, Plymouth, United Kingdom, Jan. 1996, edited by Brian J. Williams. Publisher: Ussher Society, Bristol, United Kingdom. ISSN: 0566-3954
Publication Date:1996
Note:In English. 27 refs.; illus., incl. 2 tables, sketch maps
Summary:Although variable in texture, this coarse-grained granite shows no evidence of more than one intrusive phase. Statistical examination of many modal and chemical analyses reveals that it evolved in situ to produce a more mafic and K-rich outer zone around a more felsic and Na-rich core. Fine-grained granite having affinities with the latter was intruded later, as were quartz-feldspar porphyry (elvan) dykes, at least one of which has compositional similarities with the outer granite, and aplites. It is concluded that, although the pluton is one of the older Cornubian intrusions, it has one of the least complex genetic histories. [R.E.S.]
Subjects:Chemical composition; Granites; Igneous rocks; Intrusions; Modal analysis; Outcrops; Plutonic rocks; Plutons; Statistical analysis; Textures; Cornwall England; England; Europe; Great Britain; United Kingdom; Western Europe; Bodmin Moor
Coordinates:N502000 N504500 W0043000 W0050000
Abstract Numbers:97M/3141
Record ID:1997029808
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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