Composition, fractionation trend and zoning accretion of the columbite-tantalite group of minerals in the Kenticha rare-metal field (Adola, southern Ethiopia)

Journal of African Earth Sciences

Volumn 23, Issue 3, 1996, Pages 411-431

  Tadesse, Solomon ^a   Zerihun, Desta ^b  

^a ADDIS ABABA UNIVERSITY   (Ethiopia)

^b Ethiopian Mineral Rsrc Devmt Corp   (Ethiopia)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0042732643     PISSN: 08995362     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0899-5362(97)00010-9     Document Type: Article

References (34)

1. Anderson, A. T., Jr. 1984. Probable relations between plagioclase zoning and magma dynamics. Fuego Volcano, Guatemala. American Mineralogist 69, 660-676.
2. Bailey, J. C. 1977. Fluorine in granitic rocks and melts. A review. Chemical Geology 19, 1-42.
3. Baldwin, J. R. 1989. Replacement phenomena in tantalum minerals from rare-metal pegmatites in South Africa and Namibia. Mineral Magazine 53, 571-581.
4. Cerny, P. and Ercit, T. S. 1985. Some recent advances in the mineralogy and geochemistry of Nb and Ta in rare-element granitic pegmatites. Bulletin Mineralogy 10, 499-532.
5. Cerny, P. and Ercit, T. S. 1989. Mineralogy of niobium and tantalum: crystal chemical relationships, paragenetic aspects and other economic implications. In: Lanthanides, Tantalum and Niobium (Edited by Moeller, P., Cerny, P. and Saupe, F. Springer-Verlag. pp27-79.
6. Cerny, P., Goad, B. E., Hawthorne, F. C. and Chapman, R. 1986. Fractionation trend of the Nb and Ta bearing oxide minerals in the Greer Lake pegmatite granite and its pegmatite aureole, southern Manitoba. American Mineralogist 71, 501-517.
7. Chater, A. 1971. Geology of Megado region, Southern Ethiopia. Research Institute of African Geology. University of Leeds, UK.
8. Efimove, A. F. and Senbeto, C. 1985. Rare-metals of Kenticha and other pegmatite fields of the Adola area Internal report of EMRDC. Ministry of Mines and Energy, Addis Ababa (Ethiopia).
9. Emelyanov, E. L. and Abebaw, T. 1986. Preliminary report on the prospecting results of the Kenticha rare-metal deposit Internal report of EMRDC. Ministry of Mines and Energy, Addis Ababa (Ethiopia).
10. Foord, E. E. 1976. Mineralogy and petrogenesis of layered pegmatite-aplite dykes in the MesaGrande district. San Diego County, California. Ph.D. thesis 326p. Stanford University.
11. Garbarino, C., Valera, R. and Zerihun D. 1994. Granite pegmatite system in Kenticha (Adola, Sidamo, Ethiopia) rare-metal pegmatite belt: Petrochemistry, Regional pegmatite zoning and Classification.
12. Gilboy, C. F. 1970. The Geology of the Gariboro region of the southern Ethiopia. Research Institute of African Geology. University of Leeds, UK.
13. Hildreth, W. 1979. The Bishop tuff: Evidence for the origin of compositional zonation in silicic chambers. Geological Society America Special Paper 180, 43-75.
14. Jahns, R. H. and Burnham, C. W. 1969. Experimental studies of pegmatite genesis: I. A model for the derivation and crystallization of granitic pegmatites. Economic Geology 64, 843-864.
15. Kazmin 1972. The Precambrian of Ethiopia and some aspects of the geology of the Mozambique belt. Bulletin Geophysical Observatory, Addis Ababa (Ethiopia).
16. Kirkpatrick, R. J. 1975. Crystal growth from the melt: A Review. American Mineralogist 60, 798-814.
17. Kozyrev, V. and Girma, K. 1982. Regional geological and Exploration work for gold and other minerals in the Adola gold field. Internal report of EMRDC, Ministry Mines and Energy (Ethiopia), 260p.
18. Lofgren, G. E. 1974a. An experimental study of plagioclase crystal morphology: isothermal crystallization. American Journal Science 274, 243-273.
19. Lofgren, G. E. 1974b. Temperature induced zoning in synthetic plagioclase feldspar. In: The Feldspars (Edited by MacKenzie, W. S. and Zussman, J). Proceedings of the NATO Advanced Study Institute, 1972. pp362-375. Manchester University Press, Manchester.
20. Mohr, P. A. 1971. The Geology of Ethiopia. Central Printing Press, Addis Ababa (Ethiopia).
21. Ortoleva, P. 1990. Role of attachment kinetic feedback in the oscillatory zoning of crystals grown from melts. Earth Science Review 29, 3-8.
22. Ortoleva, P. 1990a. Geochemicalself-organization. Oxford University Press, Oxford.
23. Ortoleva, P. 1990b. Nonlinear chemical waves. Manchester University Press, Manchester.
24. Pearce, T. H. and Kolisnik, A. M. 1990. Observation of plagioclase zoning using interference imaging. Earth Science Review 29, 39-46.
25. Poletayev, J. A. and Teweldemedhin, T. 1989. On a detailed exploration of the weathering mantle upper label ores of the Kenticha rare-metal deposits, site No. 2. Internal report of EMRDC. Minstry of Mines and Energy, Addis Ababa (Ethiopia), 230p.
26. Poletayev J. A. and Teweldemedhin, T. 1991. The Geology and rare-metal potential of the Kenticha pegmatite deposit Internal report of EMRDC. Minstry of Mines and Energy, Addis Ababa (Ethiopia), 11 3p.
27. Pringle, G. J., Trembath, L. T. and Pajari, G. E. 1974. Crystallization history of zoned plagioclase. Mineralogical Magazine 39, 897-877.
28. Reeder, R. J., Fagioli, R. O. and Meyers W. J. 1990. Oscillatory zoning of Mn in solution-grown calcite crystals. Earth Science Review 29, 39-46.
29. Shimiz, N. 1990. The oscillatory trace element zoning of augite phenocrysts. Earth Science Review 29, 27-37.
30. 2O in granitic liquids. In: Geochemical transport and Kinetics (Edited by Hoffman, W. H. et al.) pp139-170. Carnegie Institute of Washington Publication, Washington D. C.
31. Showe, D.R. 1968. Geology of the Spor Mountain beryllium district, Utah. In: Ore deposits in the United States, 1933-1967 Vol 2 (Edited by Ridje, G. D.), pp1148-1161. AIMMPE, New York.
32. Tsuchiyama, A. 1985. Dissolution kinetics of plagioclase in the melt of the system diopside-albite-anorthite, and origin of dusty plagioclase in andesites. Contributions Mineralogy Petrology 89, 1-16.
33. Wang, X.-J., Zou, T.-R., Xu, J.-G., Yu, X.-Y., and Qiu, Zh. 1981. Study of pegmatite minerals of the Altai region. (in Chinese) Science Publishing House, Beijing.
34. Zerihun, D. 1991. Le mineralizzazione a Ta-Nb: Classificazione, Prospezione, Valutazione. II caso di Kenticha (area di Adola, Sidamo-Ethiopia); Ph. D. Thesis 365p. Department of Earth Science, University of Milan.