Los Congos Mine, Atos Pampa, Los Reartes District, Calamuchita Department, Córdoba Province, Argentinai

Regional Level Types
Los Congos Mine	Mine
Atos Pampa	Town
Los Reartes District	District
Calamuchita Department	Department
Córdoba Province	Province
Argentina	Country

Elevation: 1030 m. above sea level.

"El Cromo" and "Los Congos" mines: in bands of ultramafic and mafic serpentinized and/or amphibolitized rocks housed in a metamorphic sequence rocks. The mineral is disseminated or in concentrations of up to 85% with less than 5 mm grain size; in podiform deposits, IARC and mineralized belts along with magnetite, magnetite, ilmenite, titaniferous magnetite, spinels rich in Al, Fe and Mg, hematite, chromomagnetite and Ni-Fe - minority proportions Cu sulfides. The zonality is common. Studied by optical and electronic microprobe.

"Los Congos" Mine:
It has been ascribed to the Western ultramafic Strip in the Sierras of Córdoba as elongated bodies of serpentinite in the foliation with a maximum length of 1300 to 1700 m for a width of 700 to 800 m in the "Los Congos" outcrop that is larger.
The main rock is made up of a medium to coarse-grained harzburgite, composed of enstatite, brown glassy elongated in sense of the general foliation, with minor structures location folded in crystals of axial plane coincides with the primary foliation S2 = S3, immersed in a matrix serpentine dark aphanitic coloration. They are in addition to the harzburgitic variety, a rock consisting of a colour altered serpentinite medium gray to dark, with greenish tones that can be thin bands of chromite and magnetite, that in some cases are scattered.
Chemical Analysis of Chromite(Fe2+Cr2O4), mineralization core:
Al2O3: 21.8 - 29.9%
Fe2O3: 9.7 - 10.6%
Cr2O3: 31.1 - 32.7%
MnO: 0.4%
FeO: 11.0 - 12.1%

Ilmenite:
Was presented in the Ultramafic Complex. Chemical Analysis by electronic microprobe:
TiO2: 53.32%.
Al2O3: 0.02%.
Fe2O3: 4.10%.
FeO: 38.14%.
Cr2O3: 0.01%.
MnO: 0.63%.
MgO: 4.81%.

Other Regions, Features and Areas containing this locality

References