Tirodite from Gangpur Group of rocks, India
Manganese bearing amphibole is recorded in the Mn silicate-oxide rocks of Gangpur Group, India and is identified to be tirodite (Mn-cummingtonitc) with the composition [Mg4.65-4.08, Fe».31-0.01 ;, Mn2.04-1.73, Cao.i<M>.i3, Nao.42-o.37] [OH/Si4Oii]2. Tirodite, coexisting with rhodonite, occurs...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1997
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| Sorozat: | Acta mineralogica-petrographica
38 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24844 |
| Tartalmi kivonat: | Manganese bearing amphibole is recorded in the Mn silicate-oxide rocks of Gangpur Group, India and is identified to be tirodite (Mn-cummingtonitc) with the composition [Mg4.65-4.08, Fe».31-0.01 ;, Mn2.04-1.73, Cao.i<M>.i3, Nao.42-o.37] [OH/Si4Oii]2. Tirodite, coexisting with rhodonite, occurs without carbonate and pyroxene and developed in a low and unbuffered Xco2 system with XMH < 0.32. Appreciable hematite in the assemblage and Fe in tirodite structure attests to an iron rich bulk composition and intermediate fo2 in the amphibolite facies condition. |
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| Terjedelem/Fizikai jellemzők: | 17-24 |
| ISSN: | 0365-8066 |