Volcanic Rocks in the Samburu Hills, Northern Kenya

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概要

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• Volcanic rocks of the Samburu Hills are composed mainly of basaltic lava flows (ankaramite, olivine basalt and hawaiite) intercalated with differentiated rock lava flows and welded tufffs (trachyte and alkali rhyolite). Basaltic rocks of various ages, from Miocene to Recent, were collected from an area of 10 x 10 km2 (Suguta Area) and their petrography and petrochemistry are described. A decrease in degree of silica-undersaturation with time from alkali basalts to transitional basalts can be recognized. Successive decrease in depth of segregation of primary magmas can explain the temporal variation in chemical composition.

• 京都大学の論文

著者

• Takehiro Koyaguchi

  Faculty Of Science University Of Tokyo

• KOYAGUCHI Takehiro

  Faculty of Science, University of Tokyo

関連論文

• Fission-Track, K-Ar Age Determinations and Palaeomagnetic Measurements of Miocene Volcanic Rocks in the Western Area of Baragoi, Northern Kenya: Ages of Hominoids
• Geology of the Nachola Area and the Samburu Hills, West of Baragoi, Northern Kenya
• Volcanic Rocks in the Samburu Hills, Northern Kenya

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