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Zones of Progressive Regional Metamorphism Across the Western Margin of the Mozambique Belt in Rhodesia and Mozambique

Published online by Cambridge University Press:  01 May 2009

J. R. Vail
J. R. Vail
Affiliation:
Research Institute of African Geology, The University of Leeds, England.
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Abstract

Investigations of the sedimentary rocks of the Umkondo System have enabled six zones of eastwardly increasing metamorphic grade to be delineated on the basis of index mineral assemblages in pelite horizons.

Chlorite, garnet (almandine), staurolite, kyanite, and sillimanite isograds have been recognized over a distance of 500 km. along the eastern border of Southern Rhodesia and are plotted on a map. More detailed reconnaissance work has been confined to the Barué highlands north-east of Inyanga. In addition, a “zone of intermediate isotopic age measurements” is proposed to the west of the lowermost chlorite zone. The isograds lie parallel to the structural edge of the north-south trending Mozambique orogenic belt and can be joined with those of similar metamorphic rocks in the east-west trending Zambesi orogenic belt, suggesting contemporaneity of the c. 500 m.y. regional tectono-thermal event in these two belts.

Type
Articles
Information
Geological Magazine , Volume 103 , Issue 3 , June 1966 , pp. 231 - 239
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Barrow, G., 1912. On the geology of lower Dee-side and the Southern Highland border. Proc. Geol. Ass., Lond., 23, 268–284.CrossRefGoogle Scholar
Bond, G., 1952. Structures and metamorphism in the Chimanimani Mountains, Southern Rhodesia. Trans. geol. Soc. S. Africa, 54, for 1951, 69–83.Google Scholar
Borges, A., and A. V. Pinto Coelho, 1957. Primeiro reconhecimento petrografico du circonscricão du Barué. Surv. Geol. e Minas, Mozambique, Bol. 21.Google Scholar
Cahen, L., 1961. Review of geochronological knowledge in middle and northern Africa. Ann. N.Y. Acad. Sci., 91, 159–594.CrossRefGoogle Scholar
Francis, G. H., 1956. Facies boundaries in pelites at the middle grades of regional metamorphism. Geol. Mag., 93, 5, 353–368.CrossRefGoogle Scholar
Holmes, A., 1951. The sequence of pre-Cambrian orogenic belts in south and central Africa. XVIII Intern. Geol. Congr., 14, 254–269.Google Scholar
Holmes, A., and Cahen, L., 1957. Géochronologie africain. Mem. Acad. roy. Sci. Col., Sci. nat. med., 8, 51, 169 pp.Google Scholar
Johnson, R. L., Slater, D., and Vail, J. R., 1963. Progress report on work on the Manica Belt and adjacent areas of Central Africa. 7th Ann. Report Res. Inst. African Geol., Univ. Leeds, 49–50.Google Scholar
Johnson, R. L., and Vail, J. R. (1965). The junction between the Mozambique and Zambesi Orogenic Belts; north-east Southern Rhodesia. Geol. Mag. 102 (6), 489–495.CrossRefGoogle Scholar
Kennedy, W. Q., 1949. Zones of progressive regional metamorphism in the Moine Schists of the Western Highlands of Scotland. Geol. Mag., 86, (1), 43–56.CrossRefGoogle Scholar
Snelling, N. J., Hamilton, E., Rex, D., Hornung, G., Johnson, R. L., Slater, D., Vail, J. R., 1964. Age determinations from the Zambesi and Mozambique Orogenic belts, central Africa. Nature, Lond., 201, 4918, 463–464.CrossRefGoogle Scholar
Swift, W. H., 1961. An outline of the geology of Southern Rhodesia. Geol. Surv. S. Rhodesia, Bull. 50.Google Scholar
Swift, W. H., 1962. The geology of the Middle Sabi Valley. Geol. Surv. S. Rhodesia, Bull. 52.Google Scholar
Teale, E. O., 1924. The geology of Portuguese East Africa between the Zambesi and Sabi Rivers. Trans. geol. Soc. S. Africa, 26, for 1923, 103–129.Google Scholar
Tilley, C. E., 1925. A preliminary survey of metamorphic zones in the southern Highlands of Scotland. Quart. J. geol. Soc., Lond., 81, 100–110.CrossRefGoogle Scholar
Tyndale-Biscoe, R. M., 1957. The geology of a portion of the Inyanga District. Geol. Surv. S. Rhodesia, Short Report 37.Google Scholar
Vail, J. R., 1965. An outline of the geochronology of the late Precambrian formations of eastern central Africa. Proc. Roy. Soc., A, 284, 354–369.Google Scholar
Watson, R. L. (in press). The geology of the Cashel, Melsetter and Chipinga Districts. Geol. Surv. S. Rhodesia, Bull. 60.Google Scholar