ELVANS OF CORNWALL (England) AND SOUTHERN SIBERIA AS SUBVOLCANIC COUNTERPARTS OF SUBALKALIC RARE METAL GRANITES
V. S. Antipin, C. Halls, M. A. Mitichkin, P. Scott, and A. N. Kuznetsov
Keywords: Elvans and rare-metal granites, geochemistry, magmatism, petrology, basalts and monzonitoids, dike belt, subvolcanic rock, isotope-geochemical study
Pages: 847-857
Subsection: PETROLOGY, GEOCHEMISTRY, AND MINERALOGY
Abstract
Elvans are known from several rare metal provinces, where they are spatially and genetically closely related to subalkalic rare-metal granites. Elvan magmatism manifests itself at the final stage of the evolution of lower-crustal granitoid magma chambers. Elvans are produced by differentiation of a subalkalic granitoid magma. Occurrence of elvans in zones of deep-seated faults and dike belts, where basite and monzonitoid magmatism is expressed, as well as isotope-geochemical data suggest that the elvan formation was much affected by a subcrustal fluid enriched in specific rare elements.
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