Macdonald, R., Bagiński, B., Kartashov, P. M., Zozulya, D. (2017) Behaviour of ThSiO4 during hydrothermal alteration of raremetal rich lithologies from peralkaline rocks. Mineralogical Magazine, 81 (4) 873-893 doi:10.1180/minmag.2016.080.138
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Behaviour of ThSiO4 during hydrothermal alteration of raremetal rich lithologies from peralkaline rocks | ||
| Journal | Mineralogical Magazine | ||
| Authors | Macdonald, R. | Author | |
| Bagiński, B. | Author | ||
| Kartashov, P. M. | Author | ||
| Zozulya, D. | Author | ||
| Year | 2017 (August) | Volume | 81 |
| Page(s) | 873-893 | Issue | 4 |
| Publisher | Mineralogical Society | ||
| DOI | doi:10.1180/minmag.2016.080.138Search in ResearchGate | ||
| Mindat Ref. ID | 244918 | Long-form Identifier | mindat:1:5:244918:4 |
| GUID | caab43d9-a7cc-4244-bcc9-6373e9837999 | ||
| Full Reference | Macdonald, R., Bagiński, B., Kartashov, P. M., Zozulya, D. (2017) Behaviour of ThSiO4 during hydrothermal alteration of raremetal rich lithologies from peralkaline rocks. Mineralogical Magazine, 81 (4) 873-893 doi:10.1180/minmag.2016.080.138 | ||
| Plain Text | Macdonald, R., Bagiński, B., Kartashov, P. M., Zozulya, D. (2017) Behaviour of ThSiO4 during hydrothermal alteration of raremetal rich lithologies from peralkaline rocks. Mineralogical Magazine, 81 (4) 873-893 doi:10.1180/minmag.2016.080.138 | ||
| Abstract/Notes | AbstractThe behaviour of ThSiO4 during low-temperature alteration has significance for element mobility and redistribution. Here we describe five types of alteration of ThSiO4 by hydrothermal fluids: (1) primary ThSiO4 associated with chevkinite-(Ce) in a quartz-epidote metasomatite; (2) during alteration of monazite-(Ce) in a quartzolite; (3) during alteration of fergusonite-(Y) in a quartz-epidote metasomatite; (4) following exsolution from chevkinite-(Ce); and (5) associated with cerite-(Ce) and with ilmenite and bastnäsite-(Ce) in late-stage veinlets in a syenitic pegmatite and a metasomatite. The great majority of crystals have been strongly altered compositionally, with variable degrees of replacement of formula elements by non-formula elements, such as Ca, Fe, P and REE. The most reliable geochemical indicators of hydrothermal alteration are low analytical totals and non-stoichiometric structural formulae. The alteration is variably ascribed to dissolution-reprecipitation and pervasive fluid infiltration along cracks. Thorium appears to have shown limited mobility in these samples. | ||
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