Title: Carbonatite volcanism : Oldoinyo Lengai and the petrogenesis of natrocarbonatites /
Authors: Bell, Keith, 1938-; Keller, J. 1938-
Publisher: Springer-Verlag,
Year: 1995
Subjects: Carbonatites Tanzania Oldoinyo Lengai Region Congresses.; Volcanism Tanzania Oldoinyo Lengai Region Congresses.; Oldoinyo Lengai (Tanzania) Congresses.
Abstract: This volume represents the results of the most recent research on field relationships, volcanology, geochemistry and petrology of Oldoinyo Lengai in Tanzania (East Africa), the only active carbonatite volcano. Peculiarities of carbonatite flows such as the highly sodic composition, their unique mineralogy, their low eruptive temperatures and viscosities, as well as their association with nephelinitic and phonolitic flows are of major interest to igneous petrologists. The wealth of new data, including the role of carbonatitic melts as metasomatizing agents in the earth's mantle are of interest to petrologists and other geoscientists.
Contents: Historic and recent eruptive activity of Oldoinyo Lengai / J.B. Dawson, J. Keller, and C. Nyamweru -- Field observations and measurements of the physical properties of Oldoinyo Lengai alkali carbonatite lavas, November 1988 / H. Pinkerton [and others] -- The dynamics of degassing at Oldoinyo Lengai / D.M. Pyle [and others] -- Petrology and geochemistry of Oldoinyo Lengai lavas extruded in November 1988 : magma source, ascent and crystallization / J.B. Dawson [and others] -- The trace element composition and petrogenesis of natrocarbonatites / J. Keller and B. Spettel -- Cathodoluminescence observations of natrocarbonatites and related peralkaline nephelinites at Oldoinyo Lengai / U. Koberski and J. Keller -- Nd and Sr isotope systematics of the active carbonatite volcano, Oldoinyo Lengai / K. Bell and J.B. Dawson -- Stable isotope characteristics of recent natrocarbonatites from Oldoinyo Lengai / J. Keller and J. Hoefs -- Decay series evidence for transfer and storage times of natrocarbonatite magma / D.M. Pyle -- An assessment of the alleged role of evaporites and saline brines in the origin of natrocarbonatite / K. Bell and J.B. Dawson -- What are the parental magmas at Oldoinyo Lengai? / T.D. Peterson and B.A. Kjarsgaard -- Peralkaline nephelinite/carbonatite liquid immiscibility : comparison of phase compositions in experiments and natural lavas from Oldoinyo Lengai / B.A. Kjarsgaard, D.L. Hamilton, and T.D. Peterson -- Experimental constraints on the possible mantle origin of natrocarbonatite / R.J. Sweeney, T.J. Falloon, and D.H. Green.