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Mineralogy and geochemistry of altered rocks associated with Lemitar carbonatites, central New Mexico, U.S.A.

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Mineralogy and geochemistry of altered rocks associated with Lemitar carbonatites, central New Mexico, U.S.A.; 1990; Article; Journal; LITHOS; McLemore, V. T.; Modreski, P. J.

Summary

The intrusion of more than 100 Cambrian-Ordovician carbonatite dikes caused minor alteration of Proterozoic granitic and mafic rocks in the Lemitar Mountains, although hematization, carbonatization and fenitization caused extensive alteration locally. Ampibolites within 15-20 m of the carbonatite dike contacts were highly altered by carbonatization. Locally the Lemitar diorite/gabbro adjacent to some carbonatites were altered in a thin, discontinuous zone by sodic-potassic fenitization. The granite at Polvadera Peak was locally altered by potassic fenitization. Most of the altered rocks have been further altered by hematization and carbonatization. The altered rocks show increases in loss on ignition and in one or more the elements [...]

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Author :
V.T. McLemore, P.J. Modreski
Publisher :
Elsevier

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Harvested on Mon Jul 21 13:19:10 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 70015800
local-pk unknown 70015800
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1016/0024-4937(90)90042-Y
series unknown LITHOS

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journalLITHOS
parts
typevolume
value26
typeissue
value1-2
languageEnglish
citationTypeArticle

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