Manganese-bearing silicate minerals from metamorphosed manganese formations of India III. tirodite /
Tirodite, the yellow manganiferous amphibole, described first by DUNN & ROY [1938] from metamorphosed manganese formations at Tirodi, Madhya Pradesh, India, has been studied in detail. Earlier workers related this mineral either to richterite or to cummingtonite. Determination of optical propert...
Elmentve itt :
| Szerző: | |
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1974
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| Sorozat: | Acta mineralogica-petrographica
21 No. 2 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24579 |
| Tartalmi kivonat: | Tirodite, the yellow manganiferous amphibole, described first by DUNN & ROY [1938] from metamorphosed manganese formations at Tirodi, Madhya Pradesh, India, has been studied in detail. Earlier workers related this mineral either to richterite or to cummingtonite. Determination of optical properties, X-ray powder data and interpretation of chemical analyses of the mineral from different localities indicate that the composition of tirodite (MnO 2.84 to 13.83%) varies fairly widely within the complete chemical series between tremolite and richterite. The tirodites were found either in an alkali-rich environment in pegmatites which assimilated part of the manganese formation they cut across, or in manganese silicate rocks themselves that have been subjected to soda-metasomatism. |
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| Terjedelem/Fizikai jellemzők: | 269-273 |
| ISSN: | 0365-8066 |