the nasirabad manganese deposit is located 5 km south of nasirabad, 8 km sw of neyriz in the fars province. structurally, the area is placed in the southeastern part of zagros thrust belt. in this area, the manganese mineralization occurred as ore layers and nodules, interlayered with pichakun radiolarite chert deposits. in this study, mineralogy and geochemistry of uranium, thorium and lead is...

We report paleomagnetic data from samples spanning several grades of enrichment in the Kalahari manganese field, South Africa, in order to assess mineralogical aspects of the ore-forming stages, and also to date these stages through comparison to previously existing, well dated paleomagnetic results from the Kaapvaal-Kalahari craton. Our paleomagnetic study confirms a multistage evolution for t...

The present studies deals with the adsorption of SO2 by manganese oxide i.e., Pyrulusite ore. Pyrulusite is used as an adsorbent for the present studies. It is found that the percentage removal of SO2 increases with the increase in contact time, follows first order kinetics and a unimolecular layer is formed during the process. The percentage removal of SO2 increases with increase in dosages an...

Geochemical anomalies are geochemical features different from what is considered normal. They can be the result of: 1. unusual or uncommon processes concentrating particular elements (e.g. an ore-forming process, weathering and element dispersion from an unusual element concentration such as an orebody); 2. element accumulation or concentration by common processes acting over long periods (e.g....

Couper, J. (1837). On the effects of black oxide of manganese when inhaled into the lungs. Brit. Ann. Med. Pharm., 1, 41-42. (Also published in French as: Note sur les effets du p6roxide de Mangan6se. J. de Chim. med. Pharmacie ToxicoL, ser. 2, 3, 233/237.) Edsall, D. L., Wilbur, F. P., and Drinker, C. K. (1919). The occurrence, course and prevention of chronic manganese poisoning. J. industr. ...