Vigezzite and associated oxides of Nb-Ta from emerald-bearing pegmatites of the Vigezzo Valley, Western Alps, Italy

Canadian Mineralogist

Volumn 46, Issue 3, 2008, Pages 619-633

  Guastoni, Alessandro ^a   Diella, Valeria ^b   Pezzotta, Federico ^c  

^a UNIVERSITY OF PADOVA   (Italy)

^b CNR Consiglio Nazionale delle Ricerche   (Italy)

^c Museo Civico di Storia Naturale   (Italy)

Author keywords

Albitized pegmatites; Columbite; Emerald beryl; Fersmite; Italy; Schorl dravite; Tantalite; Vigezzite; Vigezzo Valley; Western Alps

Indexed keywords

LANDFORMS; NIOBIUM; SODIUM; TANTALUM;

ALBITIZED PEGMATITES; COLUMBITE; EMERALD BERYL; FERSMITE; ITALY; SCHORL-DRAVITE; TANTALITE; VIGEZZITE; VIGEZZO VALLEY; WESTERN ALPS;

BEARINGS (STRUCTURAL);

ALBITIZATION; BERYL; COLUMBITE; CRYSTALLIZATION; DRAVITE; EMPLACEMENT; HYDROTHERMAL FLUID; IGNEOUS GEOCHEMISTRY; NIOBIUM; PEGMATITE; SERPENTINITE; TANTALUM;

ALPS; EURASIA; EUROPE; ITALY; PIEDMONT [ITALY]; SOUTHERN EUROPE; VERBANO-CUSIO OSSOLA; VIGEZZO VALLEY; WESTERN ALPS;

EID: 50649111843     PISSN: 00084476     EISSN: None     Source Type: Journal    
DOI: 10.3749/canmin.46.3.619     Document Type: Article

References (47)

1. 6 Y-Nb-Ta-Ti oxides from a pegmatite in Arvogno, Crana Valley, (Toceno, Vigezzo Valley, northern Italy). Rend. Soc. Ital. Mineral. Petrol. 43, 773-779.
2. ALEXANDROV, P. & GIULIANI, G. (2001): Mineralogy, age, and fluid geochemistry of the Rila emerald deposit, Bulgaria. Econ. Geol. 96, 1469-1476.
3. AURISICCHIO, C., DE VITO, C., FERRINI, V. & ORLANDI, P. (2001): Nb-Ta oxide minerals from miarolitic pegmatites of the Baveno pink granite, NW Italy. Mineral. Mag. 65, 509-522.
4. AURISICCHIO, C., FIORAVANTI, G., GRUBESSI, O. & ZANAZZI, P.F. (1988): Reappraisal of the crystal chemistry of beryl. Am. Mineral. 73, 826-837.
5. BAYLISS, P., KAESZ, H. & NICKEL, E.H. (2005): The use of chemical-element adjectival modifiers in mineral nomenclature. Can. Mineral. 43, 1429-1433.
6. BERGER, A., ROSENBERG, C. & SCHMID, S.M. (1996): Ascent, emplacement and exhumation of the Bergell pluton within the Southern Steep Belt of the central Alps. Schweiz. Mineral. Petrogr. Mitt. 76, 357-382.
7. BOSCARDIN, M., DE MICHELE, V. & MATTIOLI, V. (1976): Lo smeraldo della Val Vigezzo. La gemmologia 2, 21-26.
8. BOUSQUET, R., GOFFÉ, B., HENRY, P., LE PICHON, X. & CHOPIN, C. (1997): Kinematic, thermal and petrological model of the Central Alps: Lepontine metamorphism in the upper crust and eclogitisation of the lower crust. Tectonophysics 273, 105-127.
9. CANTADORE, F. & GRAMACCIOLI, C.M. (1967): Nuovi ritrovamenti di minerali nelle pegmatiti di Craveggia (Val Vigezzo). Natura 58, 64-70.
10. DEMARTIN, F., PILATI, T., DIELLA, V., GENTILE, P. & GRAMACCIOLI, C.M. (1993): A crystal-chemical investigation of Alpine gadolinite. Can. Mineral. 31, 127-136.
11. DE POL, C. & VESCOVI MINUTTI, L. (1967): Ricerche roentgenografiche sulla tanteuxenite di Craveggia (delorenzite di Zambonini). Rend. Soc. Ital. Mineral. Petrol. 23, 31-45.
12. ENGI, M., TODD, C.S. & SCHMATZ, D.R. (1995): Tertiary metamorphic conditions in the eastern Lepontine Alps. Schweiz. Mineral. Petrogr. Mitt. 75, 347-369.
13. ERCIT, T.S. (2005): Identification and alteration trends of granitic-pegmatite-hosted (Y,REE,U,Th)-(Nb,Ta,Ti) oxide minerals: a statistical approach. Can. Mineral. 43, 1291-1303.
14. ERCIT, T.S., ČERNÝ, P., HAWTHORNE, F. & MCCAMMON, C. (1992): The wodginite group. II. Crystal chemistry. Can. Mineral. 30, 613-631.
15. FUERTES-FUENTE, M., MARTIN-IZARD, A., BOIRON, M.C. & MANGAS VIN̄UELA, J. (2000): P-T path and fluid evolution in the Franqueira granitic pegmatite, central Galicia, north-western Spain. Can. Mineral. 38, 1163-1175.
16. 6, intermediate term of the aeschynite series. Neues Jahrb. Mineral., Monatsh., 301-308.
17. 6, a new aeschynite-type mineral from the Alps. Mineral. Mag. 43, 459-462.
18. GRAMACCIOLI, C.M. (1958): Nuovo ritrovamento di delorenzite a Craveggia. Natura 49, 110-112.
19. GUASTONI, A & MAZZOLI, C. (2007): Age determination by μ-PIXE analysis of cheralite-(Ce) from emerald-bearing pegmatites of Vigezzo Valley (Western Alps, Italy). Mitt. Österr. Mineral. Ges. 153, 297-282.
20. HANSMANN, W. (1996): Age determinations on the Tertiary Masino-Bregaglia (Bergell) intrusives (Italy, Switzerland): a review. Schweiz. Mineral. Petrogr. Mitt. 76, 421-451.
21. HAWTHORNE, F.C., MACDONALD, D.J. & BURNS, P.C. (1993): Reassignment of cation site occupancies in tourmaline: A1-Mg disorder in the crystal structure of dravite. Am. Mineral. 78, 265-270.
22. HOGARTH, D.D. (1977): Classification and nomenclature of the pyrochlore group. Am. Mineral. 62, 403-410.
23. LONDON, D. (1992): The application of experimental petrology to the genesis and crystallization of granitic pegmatites. Can. Mineral. 30, 499-540.
24. LUMPKIN, G.R. & EWING, R.C. (1992): Geochemical alteration of pyrochlore group minerals: microlite subgroup. Am. Mineral. 77, 179-188.
25. MANNUCCI, G., DIELLA, V, GRAMACCIOLI, C.M. & PILATI, T. (1986): A comparative study of some pegmatitic and fissure monazite from the Alps. Can. Mineral. 24, 469-474.
26. MATTIOLI, V. (1979): Minerali Ossolani. Arti Grafiche Medesi, Milan, Italy.
27. MATTIOLI, V. (1991): Itinerario in Valle Vigezzo: una nuova euxenite. Riv. Mineral. Ital. 14, 173-180.
28. MATTIOLI, V., APPIANI, R., CINI, V., GENTILE, P., PREITE, D. & VIGNOLA, P. (1995): Val Vigezzo. I Minerali delle Albititi. Edizioni Linea Due, Milan, Italy.
29. MAXELON, M. & MANCKTELOW, N.S. (2005): Three-dimensional geometry and tectonostratigraphy of the Pennine zone, central Alps, Switzerland and northern Italy. Earth-Sci. Rev. 71, 171-227.
30. MORGAN, G.B., VI & LONDON, D. (1987): Alteration of amphibolitic wallrock around the Tanco rare-element pegmatite, Bernic Lake, Manitoba. Am. Mineral. 72, 1097-1121.
31. MOTICSKA, P. (1970): Petrographie und Strukturanalyse des westlichen Bergeller Massivs. Schweiz. Mineral. Petrogr. Mitt. 50, 355-443.
32. NWE, Y.Y. & GRUNDMANN, G. (1990): Evolution of metamorphic fluids in shear zones: the record from the emeralds of Habachtal, Tauern Window, Austria. Lithos 25, 281-304.
33. PASSAGLIA, E. (1969): Roggianite, a new silicate mineral. Clay Minerals 8, 107-111.
34. REINHARDT, B. (1966): Geologie und Petrographie der Monte-Rosa Zone, der Sesia-Zone und des Canavese im Gebiet zwise Valle d'Ossola und Valle Loana. Schweiz. Mineral. Petrogr. Mitt. 46, 553-678.
35. RIGANTI, F. (1999): I filoni pegmatitici a "smeraldi" e niobiotantalati dell'area del Pizzo Marcio (Val Vigezzo). Doctoral thesis, Dipartimento di Scienze della Terra, Università degli Studi di Milano, Milano, Italy.
36. ROGGIANI, A.G. (1966): Il filone di feldspato sodico dell'Alpe Rosso a monte di Orcesco (valle Vigezzo). Illustrazione Ossolana 8, 23-45.
37. ROSENBLUM, S. & MOSIER, E.L. (1975): Nonmetamict nioboaeschynite-(Ce) from Alaska. Am. Mineral. 60, 309-315.
38. 39Ar ages of cross-cutting pegmatites. Earth Planet. Sci. Lett. 142, 331-351.
39. SCHMID, S.M., ZINGG, A. & HANDY, M. (1987): The kinematics of movements along the Insubric Line and the emplacement of the Ivrea Zone. Tectonophysics 135, 47-66.
40. STECK, A. & HUNZIKER, J.C. (1994): The Tertiary structural and thermal evolution of the central Alps: compressional and extensional structures in an orogenic belt. Tectonophysics 238, 229-254.
41. STEWART, D.B. (1978): Petrogenesis of lithium-rich pegmatites. Am. Mineral. 63, 970-980.
42. TRÜMPY, R. (1980): Geology of Switzerland, a Guide-Book, Part A. Wepf, Basel, Switzerland.
43. UHER, P., ČERNÝ, P., CHAPMAN, R., HATÁR, J. & MIKO, O. (1998): Evolution of Nb,Ta oxide minerals in the Prašivá granitic pegmatites, Slovakia. II. External hydrothermal Pb,Sb overprint. Can. Mineral. 36, 535-545.
44. WINTER, J.D. (2001): An Introduction to Igneous and Metamorphic Petrology. Prentice Hall, Upper Saddle River, New Jersey.
45. WISE, M.A. & ČERNÝ, P. (1996): The crystal chemistry of the tapiolite series. Can. Mineral. 34, 613-647.
46. ZAMBONINI, F. (1907): Strüverite, un nuovo minerale. Rend. Accad. Sc. Fis. Mat. Napoli 14, 113-118.
47. ZWAAN, J.C. (2006): Gemmology, geology and origin of the Sandawana emerald deposit, Zimbabwe. Scripta Geologica. National Museum of Natural History, Leiden, The Netherlands.