| Locality type: | Mine |
| Classification |
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| Species: | Pyrolusite |
| Formula: | Mn4+O2 |
| Comments: | Pyrolusite has yet to be verified from a granite pegmatite. Black "manganese dendrites" have never been identified as "pyrolusite". See Potter, R. and Rossman, G, 1979, Mineralogy of Manganese Dendrites and Coatings, American Mineralogist, v. 64, p. 1219-1226. Most black coatings are hollandite group, nsutite, birnessite, etc. |
| Confirmation |
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| Validity: | Erroneously Reported |
| Data |
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| Mineral Data: | Click here to view Pyrolusite data |
| Locality Data: | Click here to view Assunção Mine, Aldeia Nova, Ferreira de Aves, Sátão, Viseu, Portugal |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 458787 |
| Long-form Identifier: | 1:3:458787:3 |
| GUID (UUID V4): | a53e132f-3c7d-48e5-96a5-610793ef8ff5 |
| Nearest other occurrences of Pyrolusite |
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| 21.2km (13.2 miles) | ⓘReal quarry, Real, Penalva do Castelo, Viseu, Portugal |
| 78.7km (48.9 miles) | ⓘFreixial Mine, Moita, Anadia, Aveiro, Portugal |
| 81.7km (50.8 miles) | ⓘBarranco do Linhó (Vales da Cepa e de Enxutos) Mines, Luso, Mealhada, Aveiro, Portugal |
| 82.6km (51.4 miles) | ⓘSanta Cristina (Fervença) Mine, Vacariça, Mealhada, Aveiro, Portugal |
| 93.8km (58.3 miles) | ⓘRibeiro do Souto Mine, Salvador, Penamacor, Castelo Branco, Portugal |
| 93.8km (58.3 miles) | ⓘVieiro do Almagre Mine, Salvador, Penamacor, Castelo Branco, Portugal |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | et al. 2002) and from the Cape Verde islands (Assunção et al. 1965; Machado et al. 1968; Hoernle et al...metre, and which comprise abundant carbonatites (Assunção et al. 1965; Machado et al. 1968). Biotite K/Ar...Ca), rutile (Ti), corundum (Al), fayalite (Fe), pyrolusite (Mn), periclase (Mg), strontianite (Sr), barite...Clinopyroxenites at the upper end of the valley Achada de Chão de Ouro. c Nephelinite intruded by nepheline syenite...crosscutting relationships are observed at Achada de Chão de Ouro (#7, Fig. 1) where nephelinites and nepheline |
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