 | | Report (issue) | | NATURAL RESOURCES GEOLOGICAL SURVEY OF KENYA GEOLOGY OF THE NAKURU-THOMSON'S FALLSLAKE HANNINGTON AREA...number concerned. | , ', ' I GEOLOGY OF THE NAKURU-THOMSON'S FALLSLAKE HANNINGTON AREA DEGREE SHEET...Drainage into Ol Punyata Swamp (5) Drainage into Lake Nakuru and the surrounding plain (6) Drainage into Lake...(c) Dispei-Lake Hannington Phonolites (d) Lower Menengai Volcanics .. (e) Sirrkon Volcanics (ƒ) Bahati...Succession (a) Willan's Farm Porphyritic Trachyte (b) Nakuru Lake Syndicate Quarry Phonolite .. (c) Mbaruk Basalt |  | | Journal (article/letter/editorial) | | bodies sheathed by trachyte lavas. Metaluminous amphibole-bearing rhyolite domes, the early moat rhyolites...Precaldera evolved trachyte lavas contain 35% euhedral sodic sanidine phenocrysts up to 2 cm long in a glassy...pyroxene phenocrysts Fig. 6. Plot of clinopyroxene, amphibole, olivine, biotite, and orthopyroxene phenocryst...middle and upper parts. Phenocrysts consist of sodic sanidine (3-15%), hedenbergite (1%), fayalite (1%)...increase in the amount of sanidine. Phenocrysts of sodic sanidine in V 1 arc lower in anorthite content and |  | Huang, He, Wang, Tao, Zhang, Zhaochong, Li, Chao, Qin, Qie (2018) Highly differentiated fluorine-rich, alkaline granitic magma linked to rare metal mineralization: A case study from the Boziguo’er rare metal granitic pluton in South Tianshan Terrane, Xinjiang, NW China. Ore Geology Reviews, 96. 146-163 doi:10.1016/j.oregeorev.2018.04.021 | Journal (article/letter/editorial) | | fractional crystallization of alkali feldspar and amphibole. Extensive rare metal mineralization in the pluton...in situ analyses of minerals (e.g., biotite, amphibole, alkali feldspar, pyrochlore, monazite and zircon...part of the STT, unmetamorphosed Carboniferous volcano-clastic rocks and limestones unconformably overlie...Tianshan Terrane (STT), ~47 km north of the Baicheng County, Xinjiang Uygur Autonomous Region (Fig. 1b). The...orthoclase/microcline and ~30% albite), quartz (~20 vol.%), amphibole (~5 vol.%) and biotite (~5 vol.%) (Fig. 3c). No |  | | Book | | carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have recently received significant...domain characterized East Africa from Madagascar and Kenya-Ethiopia to northeastern Sudan. It represents the...Popoff 1988a). Like the Atlantic Benue trough, the Kenya-Sudan Mesozoic trends could correspond to a failed...Segoufin and Patriat 1981; Mougenot et al. 1986). The Kenya-Sudan Mesozoic troughs hypothetized above could...East-African rift. This suggests that the Mesozoic NW-SE "Kenya-Sudan" rift-system has been reactivated, similarly |  | | Report (volume) | | continents. Field work was conducted in Chad, Ethiopia, Kenya, Malawi, Nigeria, Sudan, Tanzania and Uganda. However...Baker, B.FL Tectonics and volcanism of the southern Kenya Rift Valley and its influence on rift sedimentation...structures, salic volcanism and sedimentation in the Kenya Rift from the equator northwards to Lake Turkana...from seismic and gravity data. 75 Watkins, R.T. Volcano-tectonic control on sedimentation in the Koobi...landtorm evolution in a rift valley basin, northern Kenya. Frostick, L.E. & Reid, I. Evolution and sedimentary |  | | Book | | Mineralogical Society of America (Fig. 6.6), Montserrat Volcano Observatory (Fig. 7.4a and the front cover image)...previously erupted products the hazard presented by a volcano to surrounding communities; • investigating magma...chamber that originally lay 5 km below an active volcano (but whose contents – or erupted products – are...the microscope whether a plagioclase is calcic or sodic? A simple technique is described in Box 4.1, but...2.1); plag, plagioclase; calcic plag, An50–100; sodic plag, An0–50; foid, feldspathoid. Root name Essential |
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