Fractionation of rare-earth elements in allanite and monazite as related to geology of the Mt. Wheeler mine area, Nevada

Lee, Donald E.; Bastron, Harry

doi:10.1016/0016-7037(67)90046-4

Cited by 70 publications

(40 citation statements)

References 10 publications

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“…Otherwise, Sm invariably is subordinate to minor with respect to the major REE, as is Gd. This is abundantly documented in general reviews of monazite (e.g., Neumann et al 1966, Fleischer & Altschuler 1969, as well as in statistically extensive studies of monazite from a variety of specific petrological environments: granitic suites, granitic pegmatites, tin deposits, Alpine fissures, sediments and metamorphic rocks (e.g., Lee & Bastron 1967, Donnot et al 1973, Petruk & Owens 1975, Burnotte et al 1989, Wark & Miller 1993, Watt 1995, Förster & Rhede 1995, Franz et al 1996, van Emden et al 1997, Förster 1998. What may be the reason for the unique enrichment of the Annie Claim #3 monazite-(Sm) in Sm and Gd?…”

Section: Geochemical Considerationsmentioning

confidence: 80%

MONAZITE-(Sm), A NEW MEMBER OF THE MONAZITE GROUP FROM THE ANNIE CLAIM #3 GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA

Masau¹,

Černý²,

Cooper³

et al. 2002

The Canadian Mineralogist

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Monazite-(Sm) was found in the Annie Claim #3 pod of lepidolite-subtype granitic pegmatite within the Greer Lake intrusion of pegmatitic leucogranite, in the Archean Bird River Subprovince of the Superior Province, in southeastern Manitoba. It occurs as tabular crystals ≤0.4 mm in diameter, associated with manganocolumbite, quartz, albite and lithian muscovite. Monazite-(Sm) is yellowish, translucent, with a white streak, vitreous to greasy luster, and no observed fluorescence. One good cleavage is present, tenacity is brittle, and the fracture is uneven. Monazite-(Sm) has no observable pleochroism; ␣ 1.768 (5), ␤ 1.771(3), ␥ > 1.808(3); 2V meas 29(8)°, X = b, Z ٙ c = 9° (␤ obtuse). It is monoclinic, space group P2 1 /n; a refinement from single-crystal and powder (Gandolfi) X-ray-diffraction data gave a 6.725 (1) (8)(111) Adjustment of U and Th of the monazite-(Sm) to their original contents 2.64 Ga ago slightly improves the stoichiometry and proves that all the Pb present is radiogenic. The middle-REE-dominant signature of the Annie Claim #3 monazite-(Sm) is shared with the broadly associated Y(Ta,Nb)O 4 mineral (formanite?) and dysprosian xenotime-(Y); this exotic pattern of REE abundances is possibly generated by selective and differential complexing of REE in the granite-to-pegmatite sequence of solidification.Keywords: monazite-(Sm), new mineral species, rare-earth elements, granitic pegmatite, Annie Claim #3, Manitoba, Canada. SOMMAIRENous avons découvert la monazite-(Sm) dans la lentille de pegmatite granitique à lépidolite dite Annie Claim #3, au sein du massif intrusif du lac Greer, dans la sous-province de Bird River de la Province du Supérieur, dans l'Archéen du sud-est du Manitoba. Elle se présente en cristaux tabulaires atteignant 0.4 mm en diamètre, associée à manganocolumbite, quartz, albite et muscovite lithinifère. Les cristaux de monazite-(Sm) sont jaunâtres, translucides, ayant une rayure blanche, un éclat vitreux à résineux, sans fluorescence. Nous décelons un bon clivage; la tenacité est cassante, et la fracture, inégale. La monazite-(Sm) ne montre aucun pléochroïsme observable; ␣ 1.768 (5), ␤ 1.771(3), ␥ > 1.808(3); 2V meas 29(8)°, X = b, Z ٙ c = 9° (dans l'angle ␤ obtus). Elle est monoclinique, groupe spatial P2 1 /n; un affinement des paramètres réticulaires à partir des données prélevées sur monocristal et sur poudre (méthode de Gandolfi) a donné a 6

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Section: Geochemical Considerationsmentioning

confidence: 80%

MONAZITE-(Sm), A NEW MEMBER OF THE MONAZITE GROUP FROM THE ANNIE CLAIM #3 GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA

Masau¹,

Černý²,

Cooper³

et al. 2002

The Canadian Mineralogist

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show abstract

“…1). In a study of hybrid granitoid rocks from the southern Snake Range, Nev., Lee and Bastron (1967) found accessory allanite to contain a more basic assemblage of rare earths where the granitoid rock is in contact with limestone; and the rare-earth assemblages in accessory apatites from the same rocks show the same trend (Lee and others, 1973).…”

Section: Apatite Analysesmentioning

confidence: 95%

Journal of Research of the U. S. Geological Survey, 1973, volume 1, issue 3

1973

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“…The distribution of rare earths in these hybrid rocks and in their constituent allanites, apatites, monazites, and zircons has been cited (Lee and Bastron, 1967;Lee and Van Loenen, 1971, p. 20, 21) as evidence that the chemical processes once operative in these rocks might be similar to processes which contribute to the formation of alkalic rocks and carbonatites.…”

Section: Distribution Of Rare-earth Elementsmentioning

confidence: 97%

“…Quantitative data for 20 allanites and 13 monazites, many of which coexist with the apatites listed in tables 2, 5, and 6, show sigma values ranging from 61 to 81 atomic percent (Lee and Bastron, 1967), with higher values found in those minerals from the more mafic rocks. Semiquantitative data for 25 zircons from these rocks show the same trend (Lee and others, 1968).…”

Section: Distribution Of Rare-earth Elementsmentioning

confidence: 98%

Journal of Research of the U. S. Geological Survey, 1973, volume 1, issue 1

1973

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Fractionation of rare-earth elements in allanite and monazite as related to geology of the Mt. Wheeler mine area, Nevada

Cited by 70 publications

References 10 publications

MONAZITE-(Sm), A NEW MEMBER OF THE MONAZITE GROUP FROM THE ANNIE CLAIM #3 GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA

MONAZITE-(Sm), A NEW MEMBER OF THE MONAZITE GROUP FROM THE ANNIE CLAIM #3 GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA

Journal of Research of the U. S. Geological Survey, 1973, volume 1, issue 3

Journal of Research of the U. S. Geological Survey, 1973, volume 1, issue 1

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