Quelques remarques relatives a la geochimie des filons epithermaux a pechblende

Autor:	Jacqueline Sarcia, Jacques Geffroy
Rok vydání:	1958
Předmět:	Uraninite chemistry Paleozoic Geochemistry chemistry.chemical_element Mineralogy Geology Orogeny Leaching (metallurgy) Deformation (meteorology) Tungsten Tin
Zdroj:	Bulletin de la Société Géologique de France. :531-536
ISSN:	1777-5817 0037-9409
DOI:	10.2113/gssgfbull.s6-viii.5.531
Popis:	The Erzgebirge pitchblende veins were emplaced during the Hercynian orogeny (Paleozoic) or during a late Hercynian cycle, contemporaneously with the Erzgebirge granites. Deposits like those of the Limousin region, France, are much younger than the enclosing granites. The Erzgebirge-type ores (Germany; Cornwall), characterized by Ni-Co-Bi-Ag-U, have been, or are, producers of tin, with accessory tungsten, whereas the Limousin-type ores (Portugal; France) produce tungsten with accessory tin. The Limousin-type ores are attributed to late-stage leaching from granitic zones subjected to large-scale deformation; they are therefore associated with zones of mylonization.
Databáze:	OpenAIRE
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