Occurrence of the REE-vanadate wakefieldite in the rhyolitic Joe Lott Tuff, Utah, USA

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Marco E. Ciriotti
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Iscritto il: ven 25 giu, 2004 11:31
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Occurrence of the REE-vanadate wakefieldite in the rhyolitic Joe Lott Tuff, Utah, USA

Messaggio da Marco E. Ciriotti » mar 15 ott, 2019 10:50

Prossima pubblicazione.

Referenza:
▪ Bagiński, B., Macdonald, R., Belkin, H.E., Kotowski, J., Jokubauskas, P., Marciniak-Maliszewska, B. (2020): The occurrence of the REE-vanadate wakefieldite in the rhyolitic Joe Lott Tuff, Utah, USA. Mineralogical Magazine, 84, (in press).

Abstract:
The high-silica rhyolitic Joe Lott Tuff was erupted at 19.2 ± 0.4 Ma from the Mount Belknap caldera, SW Utah. Certain units in the tuff contain two species of wakefieldite, the Nd- and Y-dominant types. They occur in disseminated streaks and patches in association with rhodochrosite, calcite, Fe-oxide, cerite, and a Mn silicate (caryopilite?), thought to have been deposited from hydrothermal fluids. The wakefieldites contain the highest levels of As (≤15.34 wt.% As2O5) and P (≤5.7 wt.% P2O5) yet recorded in the mineral, pointing to significant solid solution towards chernovite and xenotime. Thorium levels are also unusually high (≤14.2 wt.%). The source of the hydrothermal fluid(s) is unknown but may be related to uranium mineralization in the region, in that As, V and U are commonly associated in such deposits.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 26570
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Occurrence of the REE-vanadate wakefieldite in the rhyolitic Joe Lott Tuff, Utah, USA

Messaggio da Marco E. Ciriotti » gio 26 mar, 2020 17:25

Pubblicazione effettuata.

Referenza:
▪ Bagiński, B., Macdonald, R., Belkin, H.E., Kotowski, J., Jokubauskas, P., Marciniak-Maliszewska, B. (2020): The occurrence of the REE-vanadate wakefieldite in the rhyolitic Joe Lott Tuff, Utah, USA. Mineralogical Magazine, 84, 109-116.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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