Hydrothermal metasomatism of a peralkaline granite pegmatite, Khaldzan Buragtag massif, Mongolian Altai; complex evolution of REE-Nb minerals

• Autorzy: Bagiński B. , Jokubauskas P. , Domańska-Siuda J. , Kartashov P. , Macdonald R.

Identyfikatory

DOI

10.1515/agp-2016-0021

• Języki publikacji: EN

Abstrakty

EN

The low-temperature hydrothermal alteration of certain rare-metal minerals is recorded in a quartz-epidote metasomatite from the Tsakhirin Khuduk occurrence in the Khaldzan-Buragtag Nb-REE-Zr deposit, Mongolian Altai. A peralkaline granitic pegmatite was metasomatized by hydrothermal fluids released from associated intrusions, with the formation of, inter alia, chevkinite-(Ce), fergusonite-(Nd) and minerals of the epidote group. The textural pattern indicates recrystallization and coarsening of these phases. Later, low-temperature alteration byfluids resulted in the chevkinite-(Ce) being replaced by complex titanite-TiO₂-cerite-(Ce)-hingganite-hydroxylbastnäsite-(Ce) assemblages. Calcite formed late-stage veins and patches. The hydrous fluids were poor in F and CO₂ but had high Ca contents.

Słowa kluczowe

EN

Khaldzan-Buragtag Nb-REE-Zr deposit; hydrothermal alteration; composition of fluids; Chevkinite group minerals; REE minerals

PL

złoże; przeobrażenia hydrotermalne; skład płynów; minerały

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2016
• Tom: Vol. 66, no. 3
• Strony: 473--491
• Opis fizyczny: Bibliogr. 42 poz., rys., tab.

Twórcy

autor

Bagiński B.

• Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology of the University of Warsaw, Al. Żwirki i Wigury, 93, PL-02-089 Warszawa, Poland

autor

Jokubauskas P.

• Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology of the University of Warsaw, Al. Żwirki i Wigury, 93, PL-02-089 Warszawa, Poland

autor

Domańska-Siuda J.

• Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology of the University of Warsaw, Al. Żwirki i Wigury, 93, PL-02-089 Warszawa, Poland

autor

Kartashov P.

• Institute of Ore Deposits, Russian Academy of Sciences, Moscow 119107, Russia

autor

Macdonald R.

• Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology of the University of Warsaw, Al. Żwirki i Wigury, 93, PL-02-089 Warszawa, Poland
• Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK

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Uwagi

EN

This work was financially supported by IGMiP grant BSt 173504/39/2015.