Valle del Cura, Iglesia Department, San Juan, Argentina
|Latitude & Longitude (WGS84):||29° 19' 36'' South , 69° 29' 45'' West|
|Latitude & Longitude (decimal):||-29.32667,-69.49583|
|Köppen climate type:||BWk : Cold desert climate|
Valle del Cura (Priest´s Valley), Iglesia Department, Province of San Juan : High sulphidation epithermal deposits. Elevation: 2,834 m. asl.
Mineralization: Alunite, Boyleite, Kalinite, Jarlite, Wilcoxite, Mendozite, Potassium alum [Alum-(K)] and numerous secondary sulphates which are preserved due to the extreme aridity of the environment. The area is a high sulfidation system.
Kalinite: together with boyleite, both secondary sulfates, are preserved due to the extreme aridity of the environment.
Wilcoxite: In the zone of oxidation of deposits of high sulphidation. Associated with Jarlite and other sulfates.
Alunite-Natroalunite: granular masses of vitreous and Pearly surfaces of exfoliation, compact and earthy aspect have, as a result of the decomposition of rocks trachitic and their related by the reciprocal action of the dissolutions of ascending sulphides and oxidizing surface waters.
Mendozite, name given in 1828 by Mendoza, Argentina.
Chemical analysis (“San Juan”, Argentina. Anthony et al., 2003):
Al2O3 12,00 %
Na2O 7,96 %
SO3 37,70 %
H2O 41,96 %
Total 99,62 %
Jarlite: secondary product, in an area of intense hydrothermal alteration, as part of a system of high-sulphidation, and presence of alunite, gypsum, sericite, jarosite, goethite, fluorite, wilcoxite, boyleite, kalinite, pentahydrite and hexahydrite. Seen in tiny, tabular crystals or elongated, usually grouped in fans or spherical aggregates. It is closely associated with wilcoxite. It was identified by x-ray.
14 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Quaternary - Tertiary|
0 - 66 Ma
|Cenozoic volcanic rocks|
Age: Cenozoic (0 - 66 Ma)
Lithology: Volcanic rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529.