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Río Loro, Burruyacú Department, Tucumán, Argentina

Latitude: 26°36'49"S
Longitude: 65°10'57"W

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Río Loro, Departamento Burruyacú, Provincia de Tucumán, Argentina

Manganese nodules:
Nodules are found in a tertiary sedimentary sequence of the Río Loro Formation (Elevation: 623 meters above sea level). They are spherical sub, of variable size from 2-3 cm to 10 cm in diameter. They can be banded with interbedded quartz and carbonates between gangs of manganese ores, although they can also be homogeneous. The main mineralization of nodules is constituted by Manganite accompanied by Hausmannite and Pyrolusite, all recognized by the diffraction of x-rays and optics.

Sediments and bituminous shale (asphaltum):
in some places such as Loro River, appear in layers of bituminous sediment thickness variable and not continuous. Simple horizon or compounds are presented.

Mineral List

'Asphaltum'
Hausmannite

'Manganese Oxides'
'var: Manganese Dendrites'

Manganite
Mirabilite

Pyrolusite

7 entries listed. 4 valid minerals.

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References

Raúl Jorge Tauber Larry.

J. C. Ávila,M. E. Gozalvez y F. G. Sardi (1992). Los nódulos de manganeso de Tucumán.Su comparación con los de los fondos del Océano Pacífico. 1ra Reunión de Mineralogía y Metalogenia y 1ra Jornada de Mineralogía, Petrografía y Metalogénesis de Rocas Ultrabásicas. Instituto de Recursos Minerales, UNLP. Publicación 2: 35-44.

Hugo A. Peña (1970). Minerales y rocas de aplicación de la provincia de Tucumán. Dirección Provincial de Minas. Tucumán.

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 25th Sep 2012 14:34:41