Crystal-chemical and genetic controls of U-Pb systernatics of columbite-tantalite

Mineralogy and Petrology

Volumn 57, Issue 3, 1996, Pages 243-260

  Romer, R L ^a   Smeds, S A ^b   Cerny P ^c  

^a LULEÅ UNIVERSITY OF TECHNOLOGY   (Sweden)

^b UPPSALA UNIVERSITY   (Sweden)

^c UNIVERSITY OF MANITOBA   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

COLUMBITE; CRYSTAL CHEMISTRY; EXSOLUTION; FRACTIONATION; HOST ROCK; RECRYSTALLIZATION; REDOX CONDITIONS; TANTALITE;

EID: 0004192259     PISSN: 09300708     EISSN: None     Source Type: Journal    
DOI: 10.1007/bf01162361     Document Type: Article

References (19)

1. Aldrich LT, Davis GL, Tilton GR, Wetherill GW (1956) Radioactive ages of minerals from the Brown Derby Mine and the Quartz Creek Granite near Gunnison, Colorado. J Geophys Res 61: 215-232
2. Bell K (1985) Geochronology of the Carswell area, northern Saskatchewan. In: Lainé R, Alonso D, Swab M (eds) The Carswell structure uranium deposits, Saskatchewan. Geol Assoc Can Spec Pap 29: 34-46
3. Černý P (1991) Rare-element granitic pegmatites, part I. Anatomy and internal evolution of pegmatite deposits. Geosci Canada 18: 49-67
4. Černý P, Ercit TS (1985) Some recent advances in the mineralogy and geochemistry of Nb and Ta in rare-element granitie pegmatites. Bull Minéral 108: 499-532
5. Černý P, Ercit TS (1989) Mineralogy of niobium and tantalum: crystal chemical relationships, paragenetic aspects and their economic implications. In: Möller P, Černý P, Saupé F (eds) Lanthanides, tantalum and niobium. Springer, Berlin Heidelberg New York Tokyo, pp 27-79
6. Černy P, Meintzer RE, Anderson AJ (1985) Extreme fractionation in rare-element pegmatites: selected examples of data and mechanisms. Can Mineral 23: 381-421
7. Černý P, Goad BE, Hawthorne FC, Chapman R (1986) Fractionation trends of the Nb- and Ta-bearing oxide minerals in the Greer Lake pegmatitic granite and its pegmatite aureole, southeastern Manitoba Canada. Am Mineral 71: 501-517
8. Černý P, Novák M, Chapman R (1992) Effects of sillimanite-grade metamorphism and shearing on Nb-Ta oxide minerals in granitic pegmatites: Marsikov, Northern Moravia, Czechoslovakia. Can Mineral 30: 699-718
9. Langmuir D (1978) Uranium solution-mineral equilibrium at low temperatures with application to sedimentary ore deposits. Geochim Cosmochim Acta 42: 547-569
10. Romer RL, Wright JE (1992) U-Pb dating of columbites: a geologic tool to date magmatism and ore deposits. Geochim Cosmochim Acta 56: 2137-2142
11. Romer RL, Smeds S-A (1994) Implications of U-Pb age of columbite-tantalites from granitic pegmatites for the Palaeoproterozoic accretion of 1.90-1.85 Ga magmatic arcs to the Baltic Shield. Precamb Res 67: 141-158
12. Romer RL, Lehmann B (1995) U-Pb columbite age of Neoproterozoic Ta-Nb mineralization in Burundi. Econ Geol 90: 2303-2309
13. Romer RL, Smeds S-A (1996) U-Pb columbite ages from Svedonorwegian terranes in southwestern Sweden. Precamb Res 76: 15-30
14. Shannon RD (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Cryst A32: 751-767
15. Smeds S-A (1990) Regional trends in mineral assemblages of Swedish Proterozoic granitic pegmatites and their geological significance. Geol Fören Stockholm Förh 112: 227-242
16. Smeds S-A (1992) Trace elements in potassium-feldspar and muscovite as a guide in the prospecting for lithium- and tin bearing pegmatites in Sweden. J Geochem Explor 42: 351-369
17. Smeds S-A (1993) Herzenbergite (SnS) in Proterozoic granite pegmatites in north-central Sweden. Mineral Mag 57: 489-494
18. Smeds S-A, Černý P (1989) Pollucite from the Proterozoic petalite-bearing pegmatites of Utö, Stockholm archipelago, Sweden. Geol Fören Stockholm Förh 111: 361-372
19. Steiger RH, Jäger E (1977) Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology. Earth Planet Sci Lett 36: 359-362