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Showing 1 to 2 of 2 for “"Spilites"”.
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Petrological and geochemical study of spilites and associated dike rocks from the Virgin Island core (Caribbean Island arc)
<p>A continuous section of extrusive and intrusive rocks have been recovered through a drill core of about 2h30 feet that was taken at St. John, U. S. Virgin Islands. The present study is confined to the upper 1180 feet and comprises a cummulative total of 950 feet of albitized mafic extrusive …
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Geochemistry and petrology of the Lake Vermilion Formation, Ely Greenstone Belt, northeastern Minnesota
… mobile. Chemically the rocks resemble modern spilites and keratophyres. </p><p> The dacites and basalts are depleted in Ti, Zr, and Y relative to Tertiary igneous rocks of similar composition. The Lake Vermilion Formation basalts display a volcanic arc basalt trend of constant Ti02 with …