Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda
Tungsten mineralization in hydrothermal quartz veins from the Nyakabingo,Gifurwe and Bugarama deposits in central Rwanda occurs as the iron-rich endmember ofthe wolframite solid solution series (ferberite) and in the particular form of reinite, whichrepresents a pseudomorph of ferberite after scheel...
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doaj-099d8c75a9894519b2d56111a51472b42020-11-24T21:12:39ZengMDPI AGMinerals2075-163X2013-04-013212114410.3390/min3020121Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central RwandaPhilippe MuchezFriso De ClercqStijn DewaeleHans-Eike GäblerSimon GoldmannFrank MelcherTungsten mineralization in hydrothermal quartz veins from the Nyakabingo,Gifurwe and Bugarama deposits in central Rwanda occurs as the iron-rich endmember ofthe wolframite solid solution series (ferberite) and in the particular form of reinite, whichrepresents a pseudomorph of ferberite after scheelite. Primary ferberite, reinite and latesecondary ferberite are characterized by their trace element chemistry and rare earthelement patterns. The replacement of scheelite by ferberite is also documented in the traceelement composition. Primary ferberite shows high Mg, Zn, Sc, V, Nb, In and Snconcentrations, but very low Ca, Pb, Sr and Ba contents. Reinite and late secondaryferberite display an uncommon trace element composition containing high concentrationsof Ca, Pb, Sr, Ba, As and Ga, but very low levels in Sn, Zr, Hf, In, Ti, Sc, Nb, Ta, Mg andZn. Late secondary ferberite replacing primary ferberite is characterized by additionalenrichments in Bi, Pb, As and Sb. The rare earth element patterns of reinite and secondaryferberite are also similar to hydrothermal scheelite. The formation of the tungsten depositsin central Rwanda is interpreted to be epigenetic in origin, and the hydrothermalmineralizing fluids are related to the intrusion of the G4-granites.http://www.mdpi.com/2075-163X/3/2/121tungsten depositswolframiteferberitereinitemineralogytrace element chemistryrare earth elementsNyakabingoGifurweBugaramaRwanda |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Philippe Muchez Friso De Clercq Stijn Dewaele Hans-Eike Gäbler Simon Goldmann Frank Melcher |
spellingShingle |
Philippe Muchez Friso De Clercq Stijn Dewaele Hans-Eike Gäbler Simon Goldmann Frank Melcher Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda Minerals tungsten deposits wolframite ferberite reinite mineralogy trace element chemistry rare earth elements Nyakabingo Gifurwe Bugarama Rwanda |
author_facet |
Philippe Muchez Friso De Clercq Stijn Dewaele Hans-Eike Gäbler Simon Goldmann Frank Melcher |
author_sort |
Philippe Muchez |
title |
Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda |
title_short |
Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda |
title_full |
Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda |
title_fullStr |
Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda |
title_full_unstemmed |
Mineralogy and Trace Element Chemistry of Ferberite/Reinite from Tungsten Deposits in Central Rwanda |
title_sort |
mineralogy and trace element chemistry of ferberite/reinite from tungsten deposits in central rwanda |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2013-04-01 |
description |
Tungsten mineralization in hydrothermal quartz veins from the Nyakabingo,Gifurwe and Bugarama deposits in central Rwanda occurs as the iron-rich endmember ofthe wolframite solid solution series (ferberite) and in the particular form of reinite, whichrepresents a pseudomorph of ferberite after scheelite. Primary ferberite, reinite and latesecondary ferberite are characterized by their trace element chemistry and rare earthelement patterns. The replacement of scheelite by ferberite is also documented in the traceelement composition. Primary ferberite shows high Mg, Zn, Sc, V, Nb, In and Snconcentrations, but very low Ca, Pb, Sr and Ba contents. Reinite and late secondaryferberite display an uncommon trace element composition containing high concentrationsof Ca, Pb, Sr, Ba, As and Ga, but very low levels in Sn, Zr, Hf, In, Ti, Sc, Nb, Ta, Mg andZn. Late secondary ferberite replacing primary ferberite is characterized by additionalenrichments in Bi, Pb, As and Sb. The rare earth element patterns of reinite and secondaryferberite are also similar to hydrothermal scheelite. The formation of the tungsten depositsin central Rwanda is interpreted to be epigenetic in origin, and the hydrothermalmineralizing fluids are related to the intrusion of the G4-granites. |
topic |
tungsten deposits wolframite ferberite reinite mineralogy trace element chemistry rare earth elements Nyakabingo Gifurwe Bugarama Rwanda |
url |
http://www.mdpi.com/2075-163X/3/2/121 |
work_keys_str_mv |
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