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La Juli mine, Rodeo de los Molles district, Las Chacras, San Martín department, San Luis, Argentina

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Name(s) in local language(s): Mina La Juli, Rodeo de Los Molles, Provincia de San Luis, Argentina
 
This site was discovered as a result of air radimetrics anomalies detected in the area by CNEA. There is a mineralization of rare earths and thorium, which identified allanite, britholite, bastnäsite, and cerianite. The britholite-(Ce), brown, appears in compact nuclei reaching measure 8 cm. shown together with allanite-(Ce) and both are partial to completely replaced by bastnäsite-(Ce) or thorbastnäsite. It was characterized through analysis by diffraction X and electron microprobe.

Mineral List



6 entries listed. 5 valid minerals.

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References

Saulnier M.E. (1983). Estudio mineralógico de muestras provenientes de Anomalías aéreas 95Th, IITh, 23U, 12U, 114Th y Mina Las Cuevas, provincia de San Luis. Informe DEE N° 10-83, CNEA. Inédito.

Gay, H.D. y Lira, R. (1984). Mineralización thorífera y de tierras raras en el extremo septentrional del batolito de Las Chacras, San Luis. 9° Congreso Geológico Argentino, 7: 342-356.

Steele, I.M., Lira, R. y Olsen, E.(1991). Chemistry of britholite from Oka, Quebec and Las Chacras Batholith, Argentina. Unpublished report, 4 pp.

Lira, R. y Ripley, E.M. (1992). Hydrothermal alteration and REE -Th mineralization at the Rodeo de Los Molles deposit, Las Chacras batholith, central Argentina. Contributions to Mineralogy and Petrology, 110: 370-386.

Lira, R., Viñas, N.A., Ripley, E.M. y Barbieri, M. (1999). El yacimiento de tierras raras, torio y uranio Rodeo de Los Molles, San Luis. En: Recursos Minerales de la República Argentina (Ed. E.O. Zappettini). Instituto de Geología y Recursos Minerales. SEGEMAR, Anales 35: 987-997.

Mineral and/or Locality  
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