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Brannel

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Journal Article
Published: 01 December 1985
Journal of the Geological Society (1985) 142 (6): 1159-1177.
... of Land’s End and Dartmoor, implying differences both in the chemistry of the source region and in conditions of crystallization. Ages obtained for the Brannel and Wherry elvans (quartz porphyry dykes) suggest more than one episode of injection during the interval c. 280–270 Ma. An independent fluid...
Journal Article
Published: 01 June 1983
Journal of the Geological Society (1983) 140 (3): 499-509.
.... Halliday A. N. Oxygen and strontium isotopes in the British Late Caledonian granites Nature, London 1980 283 21 5 Hawkes J. R. Harding R. R. Darbyshire D. P. F. Petrology and Rb:Sr age of the Brannel, South Crofty and Wherry elvan dykes, Cornwall Bull. geol. Surv. G.B 1975...
Journal Article
Published: 01 January 2001
European Journal of Mineralogy (2001) 13 (1): 167-175.
... Johanngeorgenstadt is quite distinct from that of specimens from the only other known locality for this assemblage — South Terras Mine, St. Stephenin-Brannell, Cornwall, England ( Davis et al. , 1965 ). Further detailed binocular study revealed the presence of four additional unknowns on the hand sample...
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Journal Article
Published: 01 September 1994
Journal of the Geological Society (1994) 151 (5): 795-802.
... porphyry magmatism is less well constrained than for the granites. Rb-Sr ages obtained for the Wherry and Brannel dykes overlap within error (282 f 6 M a ; 270 f 9Ma; Darbyshire & Shepherd 1985). Although there is a bimodal distribution of K,O/Na,O ratios, no correlation is observed between age...
Journal Article
Published: 01 December 1985
Journal of the Geological Society (1985) 142 (6): 1059-1075.
.... Petrology and Rb: Sr age of the Brannel, South Crofty and Wherry elvan dykes, Cornwall Bull geol Surv Gt Br 1975 52 27 42 Hofmann A. W. Jager E. Hunziker J. C. Geochronology of the crystalline rocks of the Schwarzwald Lecture in Isotope Geology 1979 Berlin, Heidelberg, New York...