 | | 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) |
| 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) |
| 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) |
| 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 |
 | | 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 |
 | | 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 |
