THE TERTIARY ALKALlNE PROVINCE OF FORTALEZA, STATE OF CEARÁ, BRAZIL: OXYGEN ISOTOPES ANO REE-GEOCHEMISTRY
AbstractA suite alcalina, Terciária, próxima à Fortaleza, é composta de fonolitos, traquitos, nefelina sienitos, limburgitos, ankaramitos e essexitos, que intrudem rochas Precambrianas. Nódulos de álcali sienito, furchito. rocha acamada com espinélio e/ou granada, além de xenocristais de albita e ilmenita, são comuns.
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