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Nyanzian System

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Journal Article
Published: 01 September 1974
Journal of the Geological Society (1974) 130 (5): 449–460.
... of sulphide mineralization i the Dodoma Shield left data only for the Nyanza Shield, which is presented in this paper. Two systems of bedded rocks have been recognized in the greenstone belts of the Nyanza Shield (Quennell et al. x956 ). The Nyanzian System, the host to most of the gold mineralization...
Journal Article
Published: 01 June 1974
Journal of the Geological Society (1974) 130 (3): 276–277.
... Abstract P rofessor R. M. S hackleton: The valuable results obtained by the author still led to no definite solution to one of the major problems of this region. This is the relative ages of the granulite metamorphism of central and northern Uganda and the greenschist metamorphism of the Nyanzian...
Journal Article
Published: 01 November 2008
Geochemistry: Exploration, Environment, Analysis (2008) 8 (3-4): 313–322.
... terrain in the northwestern part of the Tanzanian Craton. Pegmatites, aplite, dolerite, lamprophyre dykes and quartz veins, some of which are auriferous, cut the greenstones of the Nyanzian System. The greenstone belt commonly comprises metavolcanics (mainly tholeitic and komatiitic mafic lavas...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 1972
GSA Bulletin (1972) 83 (11): 3449–3456.
... Soroti, within the basement complex in central Uganda, are indicative of a much earlier period of plutonic activity. Low-grade metasediments of the Buganda-Toro System, overlying the basement gneisses to the south, were not affected by the Pan-African event, and retain whole-rock K-Ar ages of up to 1,860...
Journal Article
Published: 01 June 1974
Journal of the Geological Society (1974) 130 (3): 263–276.
...PETER J. LEGGO Abstract Geochronological reconnaissance of the Uganda basement suggests that the Watian Granulites of the West Nile are the oldest rocks. These rocks have been closed chemical systems for at least 2880 m.y. although throughout the basement they have also been reactivated at about...
Journal Article
Published: 01 September 1972
Journal of the Geological Society (1972) 128 (5): 461–494.
... and Nyanzian Greenstone belts, and charnockitie granulites are recognized. These were intruded and replaced by the chelogenie Katarchaean granite. Within the orogenic belt pre-Mozambiquian gneisses (termed Parangan) are exposed at the western margin, and in the floor of the orogen. These were tectonically...
Journal Article
Published: 01 December 1979
Journal of the Geological Society (1979) 136 (6): 693–704.
... of the East African rift system Tectonophysics 1972 15 115 22 Gregory J. W. The rift valleys and geology of East Africa 1921 London Seeley Service Griffiths P. S. The geology of the area around Lake Hannington and the Perkerra River, Rift Valley Province, Kenya 1977 Thesis...
Journal Article
Published: 01 March 1972
Journal of the Geological Society (1972) 128 (2): 173–205.
... by faults associated with the Kavirondo rift structure, and the trough is partly infilled by Pleistocene sediments. Eastwards, on the fringe of the volcano, the Nyanzian basement is penetrated by the carbonatite cone-sheet complexes of the Ruri Hills, the ijolite-urtite mass of Usaki which is surrounded...
Journal Article
Published: 01 September 1972
Journal of the Geological Society (1972) 128 (5): 494–497.
... rose from a minimum in the stable foreland, through the front where it was probably at a maximum, into the orogenic belt. © Geological Society of London 1972 1972 Geological Society of London 494 J . V. Hepworth WExss, L. E. I959. Structural analysis of the Basement System at Turoka, Kenya...
Journal Article
Published: 12 September 2018
Geological Magazine (2019) 156 (7): 1190–1200.
... Gulf, a northeastern extension of Lake Victoria that lies in the fault-bounded Nyanza Rift system (Saggerson, 1952 ). Volcanic activity associated with the mountain began with doming of the central portion of the edifice during late Miocene time and shifted to peripheral vents during Pliocene...
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Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 915–932.
... with solidus feldspar compositions, lying as they do in the leucite solidus field of the system quartz – nepheline – kalsilite. In the fenites surrounding the carbonatites of the Tundulu complex, Malawi, Garson (1962) traced in detail, with supporting illustrations, the transition from...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.250.01.09
EISBN: 9781862394988
... by Tertiary and Quaternary sediments in eastern Kenya and the coastal strip bordering the Indian Ocean. The greenstones mainly comprise two rock groups, the Nyanzian Group (formerly Nyanzian System), which is unconformably overlain by the younger Kavirondian Group (formerly Kavirondian System). The Nyanzian...
FIGURES
Journal Article
Published: 01 July 1971
Journal of the Geological Society (1971) 127 (4): 411–425.
... with deep fault tectonics. (4) On the basis of points 1-3, the south-eastern Central European rift zone with the Kru~nd hory-Oh~e rift as its constituent part, can be incorporated in the Euro-African rift system. 5. Petrogenesis of the Mesozoic igneous province of southern Africa By K. G. Cox, Grant...
Journal Article
Published: 18 November 2016
Canadian Journal of Earth Sciences (2017) 54 (3): 290–310.
... regions. These are (1) intrusions emplaced along a circular fault system that circumscribes the plume centre, (2) intrusions emplaced along linear rifts that, in some cases, converge towards the plume centre, and (3) single or unclassified intrusions. Modelling supports that the geophysical anomalies...
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Journal Article
Journal: SEG Discovery
Published: 01 October 2000
SEG Discovery (2000) (43): 1–52.
... and Produced by David M.Pratt 46 SEG-SME Annual Meeting in Denver, CO Fort Collins, Colorado 46 SEG Web Page Printed by Johnson Printing 47 NWMA Meeting Boulder, Colorado 47 SEG FIELD TRAINING COURSE: Carbonate-hosted Zinc Deposits in - FOR CONTRIBUTORS - High-Sulfidation Epithermal Systems, Central Peru 47...
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2020
DOI: 10.5382/SP.23.08
EISBN: 9781629496429
... for use in this study. The geology and mineralization styles of Archean gold deposits in well-endowed greenstone belts are much alike, suggesting that the processes leading to the formation of giant ore systems are similar (e.g.,  Groves et al., 1998 , 2018 ; Robert et al., 2005 ; Goldfarb...
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