The chemistry of seven igneous biotites from eastern Nevada and western Utah
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Geology topics
Elaine L. Munson Brandt
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The chemistry of five accessory rock-forming apatites
Chemical and physical data are given for five samples of rock-forming apatite from diverse geologic environments in Nevada and Colorado. Four of these apatites contain rare-earth assemblages in which the cerium group is well represented but the yttrium group predominates. The fifth apatite contains a highly fractionated assemblage of the lighter (cerium group) rare earths similar to the assemblage typical of alkulic rocks.
Nevada, Colorado↗