{"refrec":{"BRefID":77959,"RR":"<b>Chayes, F.</b> (1977). The oceanic basalt-trachyte relation in general and in the Canary Islands. <i>Am. Mineral. 62(7-8)</i>: 666-671","BEntID":73497,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Am. Mineral. 62(7-8)</i>: 666-671","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Chayes, F.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Chayes, F.","Englishabstract":"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 SiO<sub>2</sub>, 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. 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