Roy Supriya: Metamorphism of sedimentary manganese deposits. In: Acta mineralogica-petrographica, (20) 2. pp. 325-336. (1972)
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Abstract
Metamorphosed sedimentary deposits of manganese occur extensively in India, Brazil, U. S. A., Australia, New Zealand, U. S. S. R., West and South West Africa, Madagascar and Japan. Different mineral-assemblages have been recorded from these deposits which may be classified into oxide, carbonate, silicate and silicate-carbonate formations. The oxide formations are represented by lower oxides (braunite, bixbyite, hollandite, hausmannite, jacobsite, vredenburgite •etc.), the carbonate formations by rhodochrosite, kutnahorite, manganoan calcite etc., the silicate formations by spessartite, rhodonite, manganiferous amphiboles and pyroxenes, manganophyllite, piedmontite etc. and the silicate-carbonate formations by rhodochrosite, rhodonite, tephroite, spessartite etc. Pétrographie and phase-equilibia data indicate that the original bulk composition in the sediments, the reactions during metamorphism (contact and regional and the variations and effect of 02 , C02 , etc. with rise of temperature, control the mineralogy of the metamorphosed manganese formations. The general trend of formation and transformation of mineral phases in oxide, carbonate, silicate and silicate-carbonate formations during regional and contact metamorphism has, thus, been established.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Acta mineralogica-petrographica |
| Date: | 1972 |
| Volume: | 20 |
| Number: | 2 |
| ISSN: | 0365-8066 |
| Page Range: | pp. 325-336 |
| Language: | English |
| Publisher: | University of Szeged, Department of Mineralogy, Geochemistry and Petrology |
| Place of Publication: | Szeged |
| Related URLs: | http://acta.bibl.u-szeged.hu/39391/ |
| Uncontrolled Keywords: | Kőzettan, Ásványtan, Földtan |
| Additional Information: | Bibliogr.: p. 334-336. ; összefoglalás angol nyelven |
| Subjects: | 01. Natural sciences 01. Natural sciences > 01.05. Earth and related environmental sciences |
| Date Deposited: | 2016. Oct. 17. 09:26 |
| Last Modified: | 2022. Jul. 22. 12:10 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/24550 |
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