stripes
Occurrence number:
008-00-002
Country:
Argentina
Region:
Salta
Location:
Longitude: -65.33, Latitude: -22.58
Carbonatite:
No
A tinguaite dyke about 1 m wide occurs north-northwest of Iruya, intruding Precambrian schists. The rock contains phenocrysts of sanidine, nepheline, titanaugite with rims of aegirine, a brown amphibole, olivine, sphene and magnetite in a matrix of alkali feldspar, aegirine, riebeckite, opaques, calcite, abundant analcime and zeolites.
References:
QUARTINO, B. J. 1961. Acerca de una tanguaita de Iruya (Provincia de Salta) y de las rocas alcalinas del noroeste Argentino. Revista de la Asociacion Geologica Argentina, 15‚ 145-57.
Location: