 | | Report (issue) |
| Report No. 45 COLONY AND PROTECTORATE OF KENYA MINISTRY OF COMMERCE Ä N D INDUSTRY GEOLOGICAL SURVEY...A GEOLOGY OF THE GWASI AREA DEGREE SHEET 41, SOUTH-WEST QUARTER AND PART OF NORTH-WEST QUARTER (with...Netherlands GEOLOGY OF THE GWASI AREA DEGREE SHEET 4J, SOUTH-WEST QUARTER AND PART OF NORTH-WEST QUARTER (with...primary geological survey of South Nyanza, in the south-western corner of Kenya. It is a most important area...places in the world. The geology of the area is complex and, in the time available for the primary survey |
 | | Journal (article/letter/editorial) |
| Alkaline Syenites at Ruri, Kenya 209 Alkaline Syenites at Ruri, South Nyanza, Kenya x By WILLIAM PULFREY...ABSTRACT Alkaline syenites from the Ruri Hills in Western Kenya are described, and the hypothesis advanced...around the Ruri Hills (Text-fig. 1), near Homa Bay, in South Nyanza province of Western Kenya. The sequence...north-east of North Ruri, where carbonatites and the volcanic rocks characteristic of the Ruri centres do not...appear. The syenodiorite outcrops on the flank of South Ruri and is described here with the feldspathoidal |
 | | Journal (article/letter/editorial) |
| Brøgger in 1921 for certain rocks of the intrusive complex at Fen in southern Norway. He described fenite...country-rock in contact with the igneous rocks of the Fen complex; however, he did not apply the term to rocks produced...around other carbonatites of the same intrusive complex (Dixey et al. 1955, Brown 1964, Garson 1965, von...fenites surrounding the carbonatites of the Tundulu complex, Malawi, Garson (1962) traced in detail, with supporting...Rosatelli et al. (2003) at the Rangwa caldera complex in western Kenya. Also, well exposed at Landslide Gully |
 | | Journal (article/letter/editorial) |
| Ž1996. found that biotites from the Stillwater complex, Montana have an average d 37 Cl of y0.18‰. On...most of the chlorine present in the Stillwater complex was derived from a subducted crustal source. In...Õan Groosr Chemical Geology 140 (1997) 137–143 complex, Transvaal, S. Africa, and sample 85CK64 is a magnetite-bearing...magnetite-bearing Proterozoic sovite from the ¨ Kruidfontein complex, Transvaal, S. Africa ŽClarke and Le Bas, 1990...age, is from the ¨ north side of the Homa mountain complex, W. Kenya ŽFlegg et al., 1977.. The last three |
 | | Journal (article/letter/editorial) |
| together with published analyses from fenites of Kenya, Uganda and Tanzania, include those of co-existing...mineral is aegirine-augite, iNew analyses of richterite, magnesioarfvedsonite and aegirine from carbonate-rich...alkali metasomatism of rocks surrounding the Fen complex in Norway, fenitization has been found to have...rock (Fig. 1). The veinlets usually consist of aegirine and pale blue-green sodic amphibole intimately...1953]), acid volcanics (I{oma) and even basalts (Ruri). Some of these localities are shown in Fig. 2. |
 | | Journal (article/letter/editorial) |
| 217-34 The petrology of phonc lites from the Kenya Rift STEPHEN J. L I P P A R D Lippard: S. J. 1973:...1973: T h e petrology of phonolites from the Kenya Rift. Lithos 6, 217-34. Field, petrographic and geochemical...rocks of Neogene age from the Rift zone in central Kenya allow three major types to be distinguished. Trace...pioneer geological studies of the Eastern Rift in Kenya who first drew attention to the importance of phonolites...1). Numerous reports and maps published by the Kenya Geological Survey (1940-), coupled with recent geochronological |
 | | Book (edition) |
| Guyana, Venezuela, Brazil, Paraguay, Angola and South-West Africa, i.a. Carbonatites are now the major...Society of South Africa and C. A. Strauss and F. C. Truter (1950A) : Geological Society of South Africa and...Geological Society of South Africa and R. L. Johnson (1961) 6-12: Geological Society of South Africa and R. L...(1961) Figure Figure 10-1: Geological Society of South Africa and S.J. Shand (1921A) 10-5: American Journal...Bisset (1937) Figure 15-26: Geological Society of South Africa and H. D. Russell, S. A. Hiemstra, and D |
 | | Journal (article/letter/editorial) |
| phenocrysts of anorthoclasecryptoperthite, fayalite, aegirine-augite, and brown hornblende set in a finegrained...products. The clinopyroxene phenocrysts have had a complex history, shown by zoning in oscillatory, patchy... 3), and only here are the cavities rimmed by aegirine, a mineral which is characteristically absent...porphyritic or aphanitic. The pyroxene is usually aegirine-augite forming long green pleochroic prisms although...colourless diopsidic pyroxene occurs rarely. The aegirine-augite phenocrysts are commonly zoned and twinned |
 | | Book |
| in Commonwealth Countries United Kingdom Ghana Kenya Malawi Rhodesia Sierra Leone Tanzania Uganda Zambia...Mozambique Republic of South Africa Sao Tomé and Principe Somali Republic South-West Africa United Arab...nepheline-bearing rocks in parts of Uganda and Kenya page 62 Figure 6 Nepheline-syenite occurrences...Institute of Geological Sciences, Exhibition Road, South Kensington, London, S.W.7. K. C. DUNHAM Director...Kalsilite, recalculated from an analysis of a complex phenocryst of kalsilite and nepheline lava of Baruta |
 | | Report (volume) |
| formulas are in dispute, whereas other are members of complex substitution series. Most rare-earth minerals contain...Rontgenite Rowlandite - - - - Dimorph of chevkinite Complex multiple oxide of Nb, Ta, Ti, U, and Poorly defined...Museum Recs.-Albany Museum, Records. Grahamstown, South Africa. Am. Acad. Arts and Sci., Proc.-American...National Research Council. Science House. Sydney, New South Wales, Australia. Bolgar. Akad. Nauk Doklady-Doklady...the Geological Society of Australia. Adelaide, South Australia. Geol. Soc. China Bull.-Geological Society |
 | | Book |
| magnetic surveys in northern Tanzania and southern Kenya B.W. Darracott, J.D. Fairhead and R.W. Girdler (Newcastle...of two areas in the Kenya Rift Valley J. Wohlenberg and N.V. Bhatt (Nairobi, Kenya) Planning of the airmagnetic...results of a seismic refraction experiment in the Kenya Rift D.H. Griffiths (Birmingham, Great Britain)...Somalian plateaux, overlooking Afar from west and south respectively, expose siaUc rocks for as much as...1 4 Fig.2. Surface structures of southern and south-central Afar, SURFACE STRUCTURE A N D PLATE TECTONICS |
 | | Book |
| colour index. This is, without doubt, the most complex lithologie association to be handled from the point...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...150-200 km and are up to 15 km thick. The entire complex is composed of over 800 mappable plutons and small...been recognized in three areas in Peru (in the south-eastern corner of the Coastal Batholith near Arequipa...1968; Fig. 28-7). Central Kazakhstan is extremely complex in geological terms. It remains an enigmatic accumulation |
 | | Book |
| colour index. This is, without doubt, the most complex lithologic association to be handled from the point...or in the mine workings at all. The Climax Mo complex is the best known example. Here three generations...150-200 km and are up to 15 km thick. The entire complex is composed of over 800 mappable plutons and small...been recognized in three areas in Peru (in the south-eastern corner of the Coastal Batholith near Arequipa...1968; Fig. 28-7). Central Kazakhstan is extremely complex in geological terms. It remains an enigmatic accumulation |
