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Morton, Roger D., Carter, Neville L. (1963) Contributions to the mineralogy of Norway. No. 21. On the occurrence of Mn-poor piemonite and withamite in Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4) 445-455

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Reference TypeJournal (article/letter/editorial)
Access RightsOpen Access
TitleContributions to the mineralogy of Norway. No. 21. On the occurrence of Mn-poor piemonite and withamite in Norway
JournalNorsk Geologisk Tidsskrift
[Norwegian Journal of Geology]
ISBN 0029-196x
AuthorsMorton, Roger D.Author
Carter, Neville L.Author
Year1963Volume43
Issue4
URL
Download URLhttps://njg.geologi.no/images/NJG_articles/NGT_43_4_445-455.pdf+
Classification
Not set
LoC
Not set
Mindat Ref. ID16647890Long-form Identifiermindat:1:5:16647890:7
GUID0
Full ReferenceMorton, Roger D., Carter, Neville L. (1963) Contributions to the mineralogy of Norway. No. 21. On the occurrence of Mn-poor piemonite and withamite in Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4) 445-455
Plain TextMorton, Roger D., Carter, Neville L. (1963) Contributions to the mineralogy of Norway. No. 21. On the occurrence of Mn-poor piemonite and withamite in Norway. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4) 445-455
In(1963) Norsk Geologisk Tidsskrift [Norwegian Journal of Geology] Vol. 43 (4) Norsk Geologisk Forening
Abstract/NotesNew occurrences of piemontite and withamite are recorded, together with a reconsideration of certain 'piedmontites' described by O. Andersen ( 1911) . Partial chemical analyses and semi-quantitative spectrographic analyses of these minerals are presented together with some optical data. It is concluded that the 'piedmontite' recorded by O. Andersen (1911) from Notodden and material recently found at Tinnsjø should be classified as withamite. Material from Furenes is identified as true piemontite. With the exception of one occurrence of withamite, the piemontites and withamites in Norway have unusually low manganese contents.

The piemontites and withamites in Norway appear to have originated either in fairly low-grade regional metamorphic environments or as late crystallization or replacement products associated with pegmatites and quartz veins within rocks which have undergone higher grades of metamorphism. This is in agreement with the observations of previous workers.

Map of Localities

Locality Pages

LocalityCitation Details
Unnamed pegmatite, Herefoss, Birkenes, Agder, Norway
Askekor, Heskestad, Lund, Rogaland, Norway
Whithamite locality 1, Tinnoset, Notodden, Telemark, Norway

Mineral Occurrences

LocalityMineral(s)
Unnamed pegmatite, Herefoss, Birkenes, Agder, Norway Albite, Allanite Group, Biotite, Chlorite Group, Epidote, Fergusonite, Fluorite, Ilmenite, Magnetite, Microcline, Molybdenite, Muscovite, Oligoclase, Pegmatite, Piemontite, Pyrite, Quartz, Withamite
Askekor, Heskestad, Lund, Rogaland, Norway Epidote, Epidote Group, Piemontite, Quartz-monzonite
Furnes, Høyland, Sandnes, Rogaland, Norway Amphibole Supergroup, Calcite, Epidote Group, Muscovite, Quartz, Sericite, Tremolite
Whithamite locality 1, Tinnoset, Notodden, Telemark, Norway Epidote, Hematite, Quartzite, Withamite


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