W and V mineralization in langban-type Fe-Mn deposits; epigenetic or syngenetic?
|Source:||GFF, 123(1), p.29-33. Publisher: Geological Society of Sweden, Stockholm, Sweden. ISSN: 1103-5897|
|Note:||In English. 41 refs.; illus., incl. 2 tables|
|Summary:||New observations of minerals rich in W and V at the carbonate-hosted Langban-type Fe-Mn-(Ba-As-Pb-Sb) deposits in the Bergslagen region, Sweden, have been made. Scheelite with variable but high Mo contents (≤ 40 mol.% powellite) commonly occurs in the hematite-quartz ores. Crystals of welinite, found in vein assemblages (Langban, Sjögruvan) and in Mn skarn matrices (Sjögruvan), are often complexly zoned and display some solid solution towards the Sb-Fe counterpart örebroite. Manganberzeliite containing up to 20 mol% of its vanadate analogue (palenzonaite) in solid solution has been recorded from the Jakobsberg deposit. In contrast to previous assumptions, there appears to be no genetic link between local granitic rocks and the W minerals. W, as well as V, is inferred to be syngenetic with Fe and Mn at these deposits. [B.L.]|
|Sections:||Economic minerals and ore deposits|
|Subsections:||Metallic deposits: regional|
|Subjects:||Diagenesis; Epigene processes; Exhalative processes; Iron ores; Manganese ores; Metal ores; Mineral deposits, genesis; Scheelite; Syngenesis; Tungstates; Tungsten ores; Vanadium ores; Europe; Scandinavia; Sweden; Western Europe; Langban-type deposits; Manganberzeliite; Welinite|
|Copyright Information:||GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe|
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