|The oceanic basalt-trachyte relation in general and in the Canary Islands|
Chayes, F. (1977). The oceanic basalt-trachyte relation in general and in the Canary Islands. Am. Mineral. 62(7-8): 666-671
In: American mineralogist. Mineralogical Society of America: Washington, etc.,. ISSN 0003-004X, more
Basalts; Geochemistry; Islands; Rocks; Trachytes; Volcanism; Canary I. [Marine Regions]; Marine
Abundant data from the Canary archipelago confirm an earlier suggestion based on scattered data from volcanic islands as a whole that, among published analyses of specimens from the oceanic basalt-trachyte association, trachytic materials are considerably more numerous than those of compositions intermediate between basalt and trachyte. Frequency distributions of SiO2, CaO, and Thornton-Tuttle index for the Canaries data are strikingly similar to those for the earlier worldwide collection. In the Canaries, as in most oceanic and many other examples of the basalt-trachyte association, trachyandesitic materials are probably considerably less abundant than trachytic materials. The relation is not readily explained by crystal fractionation but seems readily explicable by fractional melting.