The metamorphic evolution of the Paleoproterozoic (Birimian) volcanic Ashanti belt (Ghana, West Africa)

Precambrian Research

Volumn 98, Issue 1-2, 1999, Pages 11-30

  John, Timm ^a   Klemd, Reiner ^a   Hirdes, Wolfgang ^b   Loh, Geoffrey ^c  

^a UNIVERSITY OF BREMEN   (Germany)

^b FEDERAL INSTITUTE FOR GEOSCIENCES AND NATURAL RESOURCES BGR   (Germany)

^c Ministry of Lands Forestry and Mines Ghana   (Ghana)

Author keywords

Amphibolite facies; Ashanti belt; Baricentric projection; Birimian; Ghana; Metamorphism

Indexed keywords

AMPHIBOLITE FACIES; BIRRIMIAN; METAMORPHISM; P-T CONDITIONS; PROTEROZOIC;

GHANA;

EID: 0033404004     PISSN: 03019268     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-9268(99)00024-8     Document Type: Article

References (49)

1. Abouchami W., Boher M., Michard A., Albarede F. A major 2.1 Ga event of mafic magmatism in West Africa: an early stage of crustal accretion. Journal of Geophysical Research. 95:1990;17605-17629.
2. Ague J.J. Thermodynamic calculation of emplacement pressures for batholitic rocks, California: implications for the aluminium-in-hornblende barometer. Geology. 25:(6):1997;563-566.
3. 2 on the Al-in-Hornblende barometer. American Mineralogist. 80:1995;549-559.
4. Blenkinsop T., Schmidt Mumm A., Kumi R., Sangmor S. Structural geology of the Ashanti gold mine. Geologisches Jahrbuch. D100:1994;131-153.
5. Blundy J.D., Holland T.J.B. Calcic amphibole equilibria and a new amphibole-plagioclase geothermometer. Contributions to Mineralogy and Petrology. 104:1990;208-224.
6. Castro A., Fernandez C., de la Rosa J., Moreno-Ventas I., Rogers G. Signification of MORB-derived amphibolites from the Aracena metamorphic belt, Southwest Spain. Journal of Petrology. 37:1996;235-260.
7. Davis D.W., Hirdes W., Schaltegger U., Nunoo E.A. U-Pb age constraints on deposition and provenance of Birimian and gold-bearing Tarkwaian sediments in Ghana, West Africa. Precambrian Research. 67:1994;89-107.
8. Eisenlohr B.N., Hirdes W. The structural development of the early Proterozoic Birimian and Tarkwaian rocks of southwest Ghana, West Africa. Journal of African Earth Sciences. 14:1992;313-325.
9. Hammarstrom J.M., Zen E. Aluminium in hornblende: an empirical igneous geobarometer. American Mineralogist. 71:1986;1297-1313.
10. Hirdes W., Davis D.W. First U-Pb zircon age of extrusive volcanism in the Birimian Supergroup of Ghana/West Africa. Journal of African Earth Sciences. 27:1998;291-294.
11. Hirdes W., Nunoo B. The proterozoic paleoplacers at Tarkwa gold mine, SW Ghana: sedimentology, mineralogy, and precise age dating of the Main Reef and West Reef, and bearing of the investigations on source area aspects. Geologisches Jahrbuch. D100:1994;247-311.
12. Hirdes W., Davis D.W., Eisenlohr B.N. Reassessment of Proterozoic granitoid ages in Ghana on the basia of U/Pb zircon and monazite dating. Precambrian Research. 56:1992;89-96.
13. Hirdes W., Senger R., Adjei J., Efa E., Loh G., Tettey A. Explanatory notes for the geological map of southwest Ghana 1:1000000. Geologisches Jahrbuch. 83:1993;5-139.
14. Hirdes W., Davis D.W., Lüdtke G., Konan G. Two generations of Birimian (Paleoproterozoic) volcanic belts in northeastern Côte d'Ivoire (West Africa): consequences for the 'Birimian controversy'. Precambrian Research. 80:1996;173-191.
15. Holland T., Blundy J. Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contributions to Mineralogy and Petrology. 116:1994;433-447.
16. Hollister L.S., Grissmo G.C., Peters E.K., Stowell H.H., Sisson V.B. Confirmation of the empirical correlation of Al in hornblende with pressure of solidification of calc-alkaline plutons. American Mineralogist. 72:1987;231-239.
17. Hüken U., Klemd R., Olesch M. Medium grade metamorphism of the Birimian Supergroup in Ghana: evidence by fluid investigations and geothermobarometry. European Journal of Mineralogy - Bheft. 7:1995;111.
18. Johnson M.C., Rutherford M.J. Experimental calibration of the aluminium-in-hornblende geobarometer with application to Long Valley caldera (California) volcanic rocks. Geology. 17:1989;837-841.
19. Junner N.R. Gold in the Gold Coast. Gold Coast Geological Survey, Memoir No. 4. 1935;Gold Coast Geological Survey, Gold Coast.
20. Kesse G.O. The Mineral and Rock Resources of Ghana. 1985;A.A. Balkema, Rotterdam.
21. Kleinschrot D., Klemd R., Bröcker M., Okrusch M., Franz L., Schmidt K. Protores and country rocks of the Nsuta manganese deposit (Ghana). Neues Jahrbuch für Mineralogie, Abhandlungen. 168:1994;67-108.
22. 2 content of fluid inclusions in gold mineralisations in the Ashanti Belt, Ghana: a new category of ore forming fluids? Mineralium Deposita. 33:1998;317-319.
23. Klemd R., Hirdes W., Olesch M., Oberthür T. Fluid inclusions in quartz-pebbles of the gold-bearing Tarkwaian conglomerates of Ghana as guides to their provenance area. Mineralium Deposita. 28:1993;334-343.
24. Klemd R., Hünken U., Olesch M. Fluid composition and source of early Proterozoic lode gold deposits of the Birimian volcanic belt, West Africa. International Geology Review. 38:1996;22-32.
25. Kretz R. Symbols of rock-forming minerals. American Mineralogist. 68:1983;277-279.
26. Leake B.E., Wooley A.R., Arps C.E.S., Birch W.D., Gilbert M.C., Grice J.D., Hawthorne F.C., Kato A., Kisch H.J., Krivovichec V.G., Linthout K., Laird J., Mandarino J., Maresch W.V., Nickel E.H., Rock N.M.S., Schumacher J.C., Smith D.C., Stephenson N.C.N., Ungaretti L., Whittaker E.J.W., Youzhi G. Nomenclature of amphiboles, report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names. European Journal of Mineralogy. 9:(3):1997;623-651.
27. Leube A., Hirdes W., Mauer R., Kesse G.O. The Early Proterozoic Birimian Supergroup of Ghana and some aspects of its associated gold mineralization. Precambrian Research. 46:1990;139-165.
28. Loh G., Hirdes W. Geological map of southwest Ghana, 1:100000, sheets Axim and Sekondi. Ghana Geological Survey Bulletin. 49:1996;63.
29. Maruyama S., Liou J.G., Suzuki K. The Peristerite gap in low-grade metamorphic rocks. Contributions to Mineralogy and Petrology. 81:1982;268-276.
30. Maruyama S., Suzuki K., Liou J.G. Greenschist-amphibolite transition equilibria at low pressure. Journal of Petrology. 24:1983;583-604.
31. Mumin A.H., Fleet M.E. Evolution of gold mineralization in the Ashanti gold belt, Ghana: evidence from carbonate compositions and pragenesis. Mineralogy and Petrology. 55:1995;265-280.
32. Mumin A.H., Fleet M.E., Chryssoulis S.L. Gold mineralization in As-rich mesothermal gold ores of the Bogosu-Prestea mining district of the Ashanti gold belt, Ghana: remobilization of 'invisible' gold. Mineralium Deposita. 29:1994;445-460.
33. Nasir S., Okrusch M. Metabasites from the Central Vor-Spessart, North-West Bavaria, part 2: Comparison of different geothermometers and geobarometers. Chemie der Erde. 57:1997;25-50.
34. Oberthür T., Vetter U., Schmidt Mumm A., Weiser T., Amanor J.A., Gyapong W.A., Kumi R., Blenkinsop T.G. The Ashanti Gold Mine at Obuasi, Ghana: Mineralogical, geochemical, stable isotope and fluid inclusion studies on the metallogenesis of the deposit. Geologisches Jahrbuch. D100:1994;31-129.
35. Oberthür T., Schmidt Mumm A., Vetter U., Simon K., Amanor J.A. Gold mineralization in the Ashanti belt of Ghana: genetic constraints of stable isotope geochemistry. Economic Geology. 91:1996;289-301.
36. Oberthür T., Vetter U., Davis W.D., Amanor J.A. Age constraints on gold mineralisation and Paleoproterozoic crustal evolution in the Ashanti belt of southern Ghana. Precambrian Research. 89:1998;129-143.
37. Opare-Addo E., Browing P., John B.E. Pressure-temperature constraints on the evolution of an early Proterozoic plutonic suite in southern Ghana, West Africa. Journal of African Earth Sciences. 17:1993;13-22.
38. Plyusnina L.P. Geothermometry and geobarometry of plagioclase-hornblende bearing assemblages. Contibutions to Mineralogy and Petrology. 80:1982;140-146.
39. Pons J., Barbey P., Dupuis D., Léger J.M. Mechanisms of pluton emplacement and structural evolution of a 2.1 Ga juvenile continental crust: the Birimian of southwestern Niger. Precambrian Research. 70:1995;281-301.
40. Robinson P., Spear F.S., Schumacher J.C., Laird J., Klein C., Evans B.W., Doolan B.L. Phase relations of metamorphic amphiboles natural occurrence and theory. Veblen D.R., Ribbe P.H. Amphiboles: Petrology and Experimental Phase Relations. Mineralogical Society of America, Reviews in Mineralogy. 9B:1982;390.
41. Ruppel C., Royden L., Hodges K.V. Thermal modeling of extensional tectonics: application to pressure-temperature-time histories of metamorphic rocks. Tectonics. 7:1988;947-957.
42. 2 content of fluid inclusions in gold mineralisations in the Ashanti belt, Ghana: a new category of ore forming fluids? - a reply. Mineralium Deposita. 33:1998;320-322.
43. Spear F.S. NaSi⇔CaAl exchange equilibria between plagioclase and amphibole, an empirical model. Contibutions to Mineralogy and Petrology. 72:1980;33-41.
44. Spear F.S. Metamorphic Phase Equilibria and Pressure-Temperature-Time Path, Monograph. 1993;Mineralogical Society of America, Washington.
45. Sylvester P.J., Attoh K. Lithostratigraphy and composition of 2.1 Ga greenstone belts of the West African craton and their bearing on crustal evolution and the Archean-Proterozoic boundary. Journal of Geology. 100:1992;377-393.
46. Thompson J.B. Jr. Composition space, an algebraic and geometric approach. Ferry J.M. Charaterization of metamorphism through mineral equilibria. Reviews in Mineralogy. 10:1982;1-31.
47. Thompson A.B., Schulman K., Jezek J. Extrusion tectonics and elevation of lower crustal metamorphic rocks in convergent orogens. Geology. 25:1997;491-494.
48. Trzcienski W.E., Carmichael D.M., Helmstaedt H. Zoned sodic amphibole: petrologic indicator of changing pressure and temperature during tectonism in the Bathurst Area, New Brunswick, Canada. Contributions to Mineralogy and Petrology. 85:1984;311-320.
49. Wernicke B. Low-angle normal faults in the Basin and Range province, Nappe tectonics in an extending orogen. Nature. 291:1981;645-648.