Abstract
Economic concentrations of tantalum in granitic pegmatites are restricted to the rare-element class of orogenic pegmatite associations. These pegmatites are particularly abundant in the Kenoran greenstone belts and parametasedimentary gneissic troughs, Hudsonian cratonic margins and rifts, and Variscan fold belts. Abukuma-type metamorphic facies series is the typical metamorphic environment, and a close spatial relationship to major structural breaks plus interformational boundaries is noted. Within the provinces, individual pegmatite fields comprise largely posttectonic intrusions of fertile granites and their pegmatite aureoles, related to fault systems or lithologic boundaries within andalusite-, cordierite- and staurolite-bearing schists of mainly lower-amphibolite facies. Within the fields, individual granite + pegmatite groups may contain tantalum mineralization within the pegmatitic-granite cupolas of the parental granites themselves, but it is usually found only in pegmatites populating intermediate to outer parts of the aureoles. Directions of decreasing metamorphic grade of the host rocks; increasing textural and paragenetic complexity of the pegmatites; progressive changes in their typomorphic minerals; and increasing fractionation point to areas with better tantalum potential. Within individual pegmatitic granites and pegmatite bodies, a variety of geochemical indicators is available to assess the general fractionation level conducive to Ta enrichment relative to Nb, and to absolute concentrations of Ta in the bulk composition. Geochemical and geophysical methods are applicable to searching for, and outlining, pegmatite deposits. Special techniques are available for exploration in deeply weathered terranes and in glaciated regions.
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References
Anderson AJ (1984) Geochemistry, mineralogy and petrology of the Cross Lake pegmatite field, Manitoba. MSc Thesis, Univ Manitoba, Winnipeg
Anhaeusser CR (1976) Archean metallogeny in southern Africa. Econ Geol 71: 16–43
Aubert G (1969) Les coupoles granitiques de Montebras et d’Echassières (Massif Central Français) et la genèse de leurs minéralisations en étain, tungstène, lithium et beryllium. Mem BRGM 46, 345 pp
Ayres LD (1978) Metamorphism in the Superior Province of northwestern Ontario and its relationship to crustal development. In: Fraser JA, Heywood WW (eds) Metamorphism in the Canadian Shield. Geol Surv Can Pap 78-10: 25-36
Ayres LD, Černý P (1982) Metallogeny of granitic rocks in the Canadian Shield. Can Min 20: 439–536
Ayres LD, Thurston PC (1985) Archean supracrustal sequences in the Canadian Shield: an overview. Geol Assoc Can Spec Pap 29: 343–380
Baldwin JR, Knorring O von (1983) Compositional range of Mn-garnet in zoned granitic pegmatites. Can Min 21: 683–688
Baragar WRA, Scoates RFJ (1981) The Circum-Superior belt: a Proterozoic plate margin? In: Kröner A (ed) Precambrian plate tectonics. Elsevier, Amsterdam, pp 297-330
Beus AA (1960) Geochemistry of beryllium and genetic types of beryllium deposits. Acad Sci USSR Moscow Engl Transi Freeman, London 1966, 401 pp
Beus AA (1966) Distribution of tantalum and niobium in muscovites of granitic pegmatites. Geokhimya 10: 1216–1220 (in Russian)
Beus AA, Sitnin AA (1968) Geochemical features of the distribution of tantalum in granitoids. Geokhimya 579-585 (in Russian)
Beus AA et al. (1968) Geochemical exploration for endogenic deposits of rare elements on the example of tantalum. Nedra, Moscow, Engl Transi GSC Libr, Ottawa
Blockley JG (1980) The tin deposits of western Australia, with special reference to the associated granites. Geol Surv W Aust Min Res Bull 12: 184 pp
Burnol L (1974) Géochimie du béryllium et types de concentration dans les leucogranites du Massif Central Français. Bur Rech Geol Min Mem 85
Černý P (1975) Alkali variations in pegmatitic beryl and their petrogenetic implications. Jahrb Min Abh 123: 198–212
Černý P (1982a) Anatomy and classification of granitic pegmatites. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 1-39
Černý P (1982b) Petrogenesis of granitic pegmatites. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 405-461
Černý P (1989) Rare-element granitic pegmatites. In: Brown AC (ed) Monograph series on geology of ore deposits (in press)
Černý P, Brisbin WC (1982) The Osis Lake pegmatitic granite, Winnipeg River district, southeastern Manitoba. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 405-461
Černý P, Meintzer RE (1988) Fertile granites in the Archean and Proterozoic fields of rare-element pegmatites: crustal environment, geochemistry and petrogenetic relationships. In: Taylor RP, Strong DF (eds) Recent advances in the geology of granite-related mineral deposits, CIM Spec Vol 39: 170-207
Černý P, Trueman DL, Ziehlke DV, Goad BE, Paul BJ (1981) The Cat Lake-Winnipeg River and the Wekusko Lake pegmatite fields, Manitoba. Man Dep Energ Min Mineral Res Div Econ Geol Rep ER 80-1
Chackowsky LE (1987) Mineralogy, geochemistry and petrology of pegmatitic granites and pegmatites at Red Sucker Lake and Gods Lake, northeastern Manitoba. M Sc Thesis, Univ Manitoba, Winnipeg
Chackowsky LE, Černý P (1987) A unique lithophile mineralization of pegmatitic granites at Red Sucker Lake, northeastern Manitoba. GAC-MAC Annu Meet Progr Abstr 12, Saskatoon 1987, p 30
Clark GS (1982) Rubidium-strontium isotope systematics of complex granitic pegmatites. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 347-372
Clark GS, Cheung S-P (1980) Rubidium-strontium ages from the Oxford Lake-Knee Lake greenstone belt, northern Manitoba: Can J Earth Sci 17: 560–568
Condie KC (1981) Archean greenstone belts. Elsevier, Amsterdam
Cuney M, Autran A, Burnol L, Brouand M, Dudoignon P, Feybesse J-L, Gagny C, Jacquot T, Kosakevitch A, Martin P, Meunier A, Monier G, Tegyey M (1986) Résultats préliminaires apportés par le sondage GPF sur la coupole de granite albitique à topaze-lépidolite de Beauvoir (Massif Central, France). C R Acad Sci Paris 303 Ser II, 7: 569–574
Debnam AH, Webb JS (1960) Some geochemical anomalies in soil and stream sediment related to beryl pegmatites in Rhodesia and Uganda. Trans Inst Min Metall 69: 329–344
Dimroth E (1981) Labrador geosyncline: type example of early Proterozoic cratonic reactivation. In: Kröner A (ed) Precambrian plate tectonics. Elsevier, Amsterdam, pp 331-352
Gaupp R, Möller P, Morteani G (1984) Tantal-Pegmatite: Geologische, petrologische und geochemische Untersuchungen. Monogr Ser Min Dep 23. Bornträger, Berlin Stuttgart, 124 pp
Gibb RA, Walcott RI (1971) A Precambrian suture in the Canadian Shield. Earth Planet Sci Lett 10: 417–422
Ginsburg Al, Timofeyev IN, Feldman LG (1979) Principles of geology of the granitic pegmatites. Nedra Moscow, 269 pp (in Russian)
Goad BE, Černý P (1981) Peraluminous pegmatitic granites and their pegmatite aureoles in the Winnipeg River district, southeastern Manitoba. Can Min 19: 177–194
Gordiyenko VV (1970) Mineralogy, geochemistry and genesis of the spodumene pegmatites. Nedra, Leningrad, 237 pp (in Russian)
Gordiyenko VV (1971) Concentration of Li, Rb, and Cs in potash feldspar and muscovite as criteria for assessing the rare metal mineralization in granite pegmatites. Int Geol Rev 13: 134–142
Gordiyenko VV (1976) Diagrams for prognostic evaluation of rare-element mineralization in granitic pegmatites utilizing compositional variations in potassium feldspars. Dokl Acad Sci USSR 228: 442–444 (in Russian)
Haapala I (1966) On the granitic pegmatites in the Peräseinäjöki-Alavus area, South Pohjanmaa, Finland. Bull Comm Geol Finl 224, 98 pp
Hatcher MI, Elliott A (1986) Greenbushes — a new world source of lithium. 7th Int Congr Ind Mineral Proc, pp 217-232
Heinrich EWm (1953) Zoning in pegmatite districts. Amer Min 38: 68–87
Heinrich EWm (1962) Geochemical prospecting of the beryl and columbite. Econ Geol 57: 616–619
Heinrich EWm (1975) Economic geology and mineralogy of petalite and spodumene pegmatites. Ind J Earth Sci 2: 18–29
Henderson JB (1981) Archaean basin evolution in the Slave Province, Canada. In: Kröner A (ed) Precambrian plate tectonics. Elsevier, Amsterdam, pp 213-236
Hornung G (1962) Wall rock composition as a guide to pegmatite mineralization. Econ Geol 57: 1127–1130
Hornung G, Knorring O von (1962) Pegmatites of the North Mtoko region, southern Rhodesia. Trans Geol Soc S Afr 65, 2: 153–180
Jahns RH, Griffitts WR, Heinrich EWm (1952) Mica deposits of the southeastern Piedmont. US Geol Surv Prof Pap 248-A: 102 pp
Kesler TL (1961) Exploration of the Kings Mountain pegmatites. Min Eng 13: 1062–1068
Kesler TL (1976) Occurrence, development and long-range outlook of lithium-pegmatite ore in the Carolinas. US Geol Surv Prof Pap 1005: 45–50
Kistler RW, Ghent ED, O’Neill JR (1981) Petrogenesis of garnet two-mica granites in the Ruby Mountains, Nevada. J Geophys Res 86, B 11: 10591–10606
Kosakevitch A (1976) Evolution de la minéralisation en Li, Ta, et Nb dans la coupole granitique de Beauvoir (Massif d’Échassières, Allier). Serv Geol Nat Bur Rech Geol Min Rep 76 SGN, 316 MGA
Kuzmenko MV (ed) (1976) Rare-element granitic pegmatite fields (geochemical specialization and distribution). Nauka, Moscow, 332 pp (in Russian)
London D (1986) Holmquistite as a guide to pegmatitic rare metal deposits. Econ Geol 81: 704–712
Longstaffe FJ (1982) Stable isotopes in the study of granitic pegmatites and related rocks. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 373-404
Longstaffe FJ, Černý P, Muehlenbachs K (1981) Oxygen isotope geochemistry of the granitoids in the Winnipeg River pegmatite district, southeastern Manitoba. Can Min 19: 195–204
Makagon VM, Nesmelov GG, Poletayev IA, Shmakin BM (1974) Contact alterations and geochemical anomalies around pegmatite veins with tantalum-cesium-lithium mineralization. Dokl Earth Sci Sect AGI Trans 219: 221–223
Marshall BT, Herman JS (1986) Trace element distribution in the soils above deeply weathered pegmatites, Virginia, U.S.A.: implications for exploration. Appl Geochem 1: 681–690
Matheis G (1981) Trace-element patterns in lateritic soils applied to geochemical exploration. J Geochem Explor 15: 471–480
Meintzer RE (1987) The mineralogy and geochemistry of the granitoid rocks and related pegmatites of the Yellowknife pegmatite field, Northwest Territories. PhD Thesis, Univ Manitoba, Winnipeg
Nedumov IB (1964) The process of differentiation of pegmatitic melt and the role of tectonics in the formation of rare-element pegmatites. Int Geol Congr New Delhi 22 Sess Rep Pt VI: 116–139
Nurmi PA, Haapala I (1986) The Proterozoic granitoids of Finland: granite types, metallogeny and relation to crustal evolution. Bull Geol Soc Finl 58: 203–233
Odikadze GL (1958) On the presence of niobium and tantalum in muscovites from pegmatites of the Dzirulsk crystalline massif. Geokhimya 4: 479–485 (in Russian)
Ovchinnikov LN (ed) (1976) Lithogeochemical methods for prospecting rare-metal pegmatites. Acad Sci USSR, Moscow, 79 pp (in Russian)
Reedman AJ (1973) Prospection and evaluation of beryl pegmatites in south-west Uganda. Overseas Geol Min Res 41: 86–100
Saggerson EP, Turner LM (1976) A review of the distribution of metamorphism in the ancient Rhodesian craton. Precamb Res 3: 1–53
Shearer CK, Papike JJ, Laul JC (1987) Mineralogical and chemical evolution of a rare-element granite-pegmatite system: Harney Peak granite, Black Hills, South Dakota. Geochim Cosmochim Acta 51: 473–486
Shmakin BM (1979) Composition and structural state of K-feldspars from some U.S. pegmatites. Am Mineral 64: 49–56
Solodov NA (1962) Internal structure and geochemistry of rare-element granitic pegmatites. Acad Sci USSR, Moscow, 243 pp (in Russian)
Solodov NA (1971) Scientific principles of prospective evaluation of rare-element pegmatites. Nauka, Moscow, 292 pp (in Russian)
Trueman DL, Černý P (1982) Exploration for rare-element granitic pegmatites. In: Černý P (ed) Granitic pegmatites in science and industry. Min Assoc Can Short Course Handb 8: 463-494
Utchakin YM, Shimanskyi AA, Pauller TI (1962) Rare-alkali content of feldspar of the Sayan pegmatites. Geokhimiya 1962: 673–680 (in Russian)
Varlamoff N (1972) Matériaux pur l’établissement des types et de la zonéographie des pegmatites granitiques à métaux rares de Madagascar. Acad R Sci Outre Mer, Sci Nat Med NS 18-6: 72 pp
Walker RJ (1984) The origin of the Tin Mountain pegmatite, Black Hills, South Dakota. PhD Thesis, Inst Stud Min Deposits, S Dak School Min Tech, Rapid City, 384 pp
Winkler HGF (1967) Petrogenesis of metamorphic rocks, 2nd edn. Springer, Berlin Heidelberg New York, 334 pp
Wise MA (1987) Geochemistry and crystal chemistry of Nb, Ta and Sn minerals from the Yellowknife pegmatite field, N.W.T. PhD Thesis, Univ Manitoba, Winnipeg
Zagorskyi VYe, Makagon VM, Makagon LD, Chuvashova LA, Arbatskaya SN (1979) Tantalum, niobium, zirconium and hafnium in rare-metal pegmatite exo-contacts. Geokhimiya 1979 4: 528–534 (in Russian)
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Černý, P. (1989). Exploration Strategy and Methods for Pegmatite Deposits of Tantalum. In: Möller, P., Černý, P., Saupé, F. (eds) Lanthanides, Tantalum and Niobium. Special Publication No. 7 of the Society for Geology Applied to Mineral Deposits, vol 7. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87262-4_13
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DOI: https://doi.org/10.1007/978-3-642-87262-4_13
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