 | | Journal (article/letter/editorial) | | LAKE RUDOLF REGION: 1. T H E B A S A N I T E - T E P H R I T E SERIES OF THE KORATH RANGE F.H. BROWN ...of the Lake Rudolf Region: I. T h e basanite-tephrite series of the Korath Range. Lithos 2, 239-260.... T h e Korath Range, a QuaternatT volcanic range, is situated in southern Ethiopia, and is one of a n...basanite and tephrite lavas with phenocrysts of titanaugite, olivine (in the basanites) and Ti-poor kaersutite...kaersutite (in the tephrites). Plagioclase is restricted to the groundmass and is zoned normally from bytownite |  | | Journal (article/letter/editorial) | | LAKE RUDOLF REGION: 1. T H E B A S A N I T E - T E P H R I T E SERIES OF THE KORATH RANGE F.It. BROWN...of the Lake Rudolf Region: I. T h e basanite-tephrite series of the Korath Range. Lithos 2, 239-260.... T h e Korath Range, a Quaternary volcanic range, is situated in southern Ethiopia, and is one of a n...basanite and tephrite lavas with phenocrysts of titanaugite, olivine (in the basanites) and Ti-poor kaersutite...kaersutite (in the tephrites). Plagioclase is restricted to the groundmass and is zoned normally from bytownite |  | | Journal (article/letter/editorial) | | VOLCANOES RUDOLF REGION : H. OF THE LAKE The lavas of North Island, South Island and the Barrier F...volcanoes of the Lake Rudolf Region: II. The lavas of North Island, South Island and the Barrier. Lithos 4,... 305-23. North Island, South Island, and the Barrier are Quaternary volcanoes in the Lake Rudolf portion...trachyte. Magnesian olivine, diopsidic augite, and calcic plagioclase appear as phengcrysts in the more basic...trachyte of the Barrier. Xenocrysts of calcic plagioclase occur in the trachyte of North Island. The groundmasses |  | | Journal (article/letter/editorial) | | tephrites, ankaramitic lavas and trachyte. Phenecrysts of ofivine, clinopyroxene and pla#ocla~ are found m b~a_nite...hanyne. Olivine and less conm~only hauyne are absent from tephrite while amphibole and biotite are common...phases and are thought to represent crystal clots or cumulates. Low Ti, high AI, low Ni and Cr and high...~ from Indonesia. Although the structure in the region of Ambittle is not web known h seems likely that...alone are insufficient to explain their composition and processes of volatile differentiation m~y have occurred |  | | Report (chapter) | | University, Lancaster LA1 4YQ, UK 2Department of Geology and Geophysics, University of Edinburgh, West Mains Road...Abstract: The late Tertiary to Recent Kenya rift valley and the deeply dissected, Proterozoic, Gardar province...mildly alkaline and transitional basalts. Gardar activity was dominated by mildly alkaline and transitional...transitional basalts; basanites and nephelinites are rare or absent, the most undersaturated representatives being...of the mafic rocks have lithospheric signatures, and that asthenospheric magmas had no direct access to |  | | Journal (article/letter/editorial) | | Petrology of Clinopyroxenite Ejecta from Somma-Vesuvius and Their Genetic Implications A. Cundari With 3 Figures...Summary A suite of clinopyroxenite nodules, megacrysts and associated lavas from Somma-Vesuvius, Italy, has...the Roman Region. The clinopyroxenites are essentially composed of clinopyroxene + mica and subordinate...subordinate olivine, plagioclase, spinels, apatite and glass. The megacrysts are clinopyroxene fragments. The...The associated lavas are leucite-tephrites and a tephritic leucitite. The mineralogy of the clinopyroxenites |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib. Mineral. Petrol. 71, 139 150 (1979) 9 by Springer-Verlag...Quaternary Alkalic and Sub-Alkalic Volcanism in South Auckland, New Zealand Warwick J. Rafferty and Robert F....respects comparable to back-arc volcanism of Japan and intra-plate volcanism in S.E. Australia. Volcanism...between 1.56 m.y. (B.P.) and 0.51 m.y. has produced some 20 km 3 of lava and scoria from at least 70 centres...(basanite and alkali-olivine basalt), and are associated with maars and small scoria cones and many contain |  | | Journal (article/letter/editorial) | | acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not...will undergo additional copyediting, typesetting and review before it is published in its final form,...may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain...the Mobile Belt Tyrone O. Rooney Dept. of Earth and Environmental Sciences, Michigan State University...temporal development of magmatism in both rifts, and within the interposing Turkana re Depression. Notwithstanding |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1982) 81:212-218 9 Springer-Verlag...Crystallization Trends in Leucite-Bearing and Related Assemblages A.K. Ferguson* and A. Cundari School of Earth Sciences...leucite-bearing and related rocks from well-known localities in Italy, Germany, Uganda and Australia demonstrate...feldspar crystallization trend in the host lava and only the groundmass feldspar zoning trend is a reliable...Textural relationships indicate that coexisting plagioclase and alkali feldspar crystallized sequentially, |  | | Journal (article/letter/editorial) | | Mineral Chemistry and Petrogenetic Aspects of the Vico Lavas, Roman Volcanic Region, Italy A. Cundari...the "excess silica" in leucite is a significant and widespread crystal-chemical characteristic which...of KA1SiaO8 and/or differential loss of potassium from the leucite structure. Plagioclase geothermometer...geothermometer data suggest increasing plagioclase control in the differentiation with decreasing Mg/Mg + Fe 2 +...ferri-Tschermak's and Ca-Tschermak's molecules, probably controUed by temperature and compositional variations |  | Medaris, L. Gordon, Boerboom, Terrence J., Jicha, Brian R., Singer, Bradley S. (2015) Metasaprolite in the McGrath Gneiss, Minnesota, USA: Viewing Paleoproterozoic weathering through a veil of metamorphism and metasomatism. Precambrian Research, 257. 83-93 doi:10.1016/j.precamres.2014.11.027 | Journal (article/letter/editorial) | | Paleoproterozoic weathering through a veil of metamorphism and metasomatism L. Gordon Medaris Jr. a,â , Terrence...420 cm-thick metasaprolite, which is devoid of plagioclase but contains abundant microcline, occurs in the...conditions and chemically modiďŹed by potassium metasomatism, mass ďŹuxes related to weathering and metasomatism...judicious application of several geochemical parameters and the AâC*NâK plot (Fedo et al., 1995). The metasaprolite...67â94 for the Plagioclase Index of Alteration, 62â72 for the Chemical Index of Alteration, and 47 for the |  | | Journal (article/letter/editorial) | | University of Melbourne, Parkville, 3052, Australia, and the Broken Hill Proprietary Company Limited, Melbourne...Chemistry from Leucite-Bearing and Related Assemblages A. Cundari and A. K. Ferguson With 2 Figures Received...leucite-bearing and related assemblages occurring in south-west Uganda, Roman Region, Australia and Antarctica...distinct and systematic chemical variations, which are evaluated in terms of the ratios Ti/A1 and (2-Si)/A1...rock series and depend on the level of alkalinity of the host rocks, i.e. (Na+K)/A1 and the pressure |  | | Journal (article/letter/editorial) | | Springer-Verlag 1975 Fractional Crystallisation and the Petrology of Dunedin Volcano R.C. Price Department...Abstract. Major and trace element data and mineral chemical data indicate that the range in rock types...various levels in the crust and upper mantle. A diversity among parental materials and the operation of the...fractionation process at varying levels in the crust and mantle under varying conditions of pH20 have resulted...isotopic and trace element characteristics from the undersaturated magma series. Introduction Age and History |  | | Journal (article/letter/editorial) | | e-mail: ghiorso@ofm-research.org G. Moore Earth and Environmental Sciences, University of Michigan, 2534...University of Oregon, Eugene, OR 97403, USA Mineralogy and Petrology from 1973 through 1990, during which time...discipline, and the unparalleled intellectual generosity he showed toward his students and academic colleagues...many excellent biographical sketches of Ianâs life and critiques of his research contributions (e.g., Lange...associates, and to his University. He gave freely of ideas, many of which shaped the careers and reputations |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology 9 by Springer-Verlag 1977 Geochemistry and Petrogenesis of a Bas...Basalt-Benmoreite-Trachyte Suite from the Southern Part of the Gregory Rift, Kenya Brian H. Baker 1, G o...o r d o n G. Goles 1, William P. Leeman 2, and Marilyn M. Lindstrom 3 t Center for Volcanology,University...Abstract. In the southern Gregory Rift valley a series of transitional basalt, ferrobasalt, and benmoreite...of this suite and their phenocrysts and microphenocrysts suggest that the ferrobasalts and benmoreites |  | | Journal (article/letter/editorial) | | occurrence of such mineral pairs as leucite and sanidine, or nepheline and albite indicates that silica activity...activity may be buffered over a range of temperatures. Using published thermody'namic data, the variation...variation of silica activity with temperature for these and other reactions has been calculated. Two bounding...the tholeiitic magma and CaTiOr*SiOz:CaTiSiOs; series from alkali olivine-basalt and all its derivatives...feldspar-present from the feldspar-free assemblages,and thus the nephelinites (sensulato) from the alkali |  | | Journal (article/letter/editorial) | | Contr. Mineral. and Petrol. 33, 162-170 (1971) 9 by Springer-Verlag 1971 Shonkin Sag Laccolith, Montana...Geochemistry W. P. Nash Department of Geological and Geophysical Sciences, University of Utah, Salt Lake...sequence displays systematic variations in major and trace elements with evolution. The accumulative more...shonkinites are enriched in Co, Ni, Cr; La, Ce, Zr, and Nb are concentrated in the most evolved differentiate...nepheline syenite. Maximum abundances of K, Rb, Ba, Pb, and Sr occur in the intermediate syenitic differentiates |  | | Journal (article/letter/editorial) | | island arcs), calc-alkali basalts and shoshonites (from volcanic arcs) and within-plate basalts could be...subdivision of withinplate basalts into ocean island and continental basalts could not however be achieved...with any great success. Gassification of weathered and metamorphosed ocean-floor basalts showed that alteration...numerical and visual methods to lavas of 'unknown' tectonic settings (Archaean greenstones and high-potash...element oxides, SiO2, TiO2, A12O3, FeO, MgO, CaO, Na2O and K2O (the major element 'pattern'), is used extensively |  | | Journal (article/letter/editorial) | | to Mineralogy and Petrology 9 by Springer-Verlag 1977 Recent Volcanism at Schonchin and Cinder Buttes...A. Mertzman, Jr. Department of Geology, Franklin and Marshall College, Lancaster, PA. 17604, USA Abstract...spatter and cinder cones and their associated flows. Two particular structures, Cinder Butte and Schonchin...in terms of age, volume, modal mineralogy, and many major and trace elements. Significant differences with...Ba, Zr, and LREE can be related to possible changes in the mineralogy within the source region of these |  | Trela, Jarek, Vidito, Christopher, Gazel, Esteban, Herzberg, Claude, Class, Cornelia, Whalen, William, Jicha, Brian, Bizimis, Michael, Alvarado, Guillermo E. (2015) Recycled crust in the GalĂĄpagos Plume source at 70 Ma: Implications for plume evolution. Earth and Planetary Science Letters, 425. 268-277 doi:10.1016/j.epsl.2015.05.036 | Journal (article/letter/editorial) | | v1.157; Prn:15/06/2015; 10:21] P.1 (1-10) Earth and Planetary Science Letters â˘â˘â˘ (â˘â˘â˘â˘) â˘â˘â˘ââ˘â˘â˘ Contents...Contents lists available at ScienceDirect Earth and Planetary Science Letters www.elsevier.com/locate/epsl... Virginia Tech, Blacksburg, VA 24061, USA Earth and Planetary Sciences, Rutgers University, Piscataway...WisconsinâMadison, Madison, WI 53706, USA e Department of Earth and Ocean Sciences, University of South Carolina, Columbia...accreted terranes of the Caribbean and along the west coast of Costa Rica and Panama provide evidence on the |  | | Journal (article/letter/editorial) | | Universityof Alberta,Edmonton,T6G 2E1, Alberta,Canada and JAMES G~EIWILLE HOLL~D Department of ~010~~1 Sciences... metamorphic and sedimentary rock series, due to its incorporation in a predictable and uniform manner...talc-alkali basalt melts, plagioclase, kaersutite, augitic clinopyroxene and calcite have low Y for their... garnet, orthopyroxene, apatite, sphene, zircon and most K, Na rioh minerals other than plagio&se have...sedimentary processes, Cc/Y becomes lower in shales and sandstones, but higher in limestones than their source |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1981) 76:321-335 9 Springer-Verlag...Baldridge .1, I.S.E. Carmichael 2, and A.L. Albee 1 1 Division of Geological and Planetary Sciences, California...Pasadena, California 91125, USA 2 Department of Geology and Geophysics, University of California, Berkeley, California...phases found in leucite-basanites, -trachytes, and -phonolites may be used to portray crystallization...that contain the assemblage leucite-nepheline-plagioclase-sanidineand liquid, a natural pseudo-invariant |  | Stolz, A. J., Varne, R., Wheller, G. E., Foden, J. D., Abbott, M. J. (1988) The geochemistry and petrogenesis of K-rich alkaline volcanics from the Batu Tara volcano, eastern Sunda arc. Contributions to Mineralogy and Petrology, 98 (3) 374-389 doi:10.1007/bf00375187 | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1988) 98:374-389 9 Springer-Verlag1988...Springer-Verlag1988 The geochemistry and petrogenesis of K-rich alkaline volcanics from the Batu Tara volcano, eastern...Stolz 1, R. Varnc ~, G.E. Wheller 1, J.D. Foden 2, and M.J. Abbott 3 1 Department of Geology, University...Mineralogical, major and trace element, and isotopic data are presented for leucite basanite and leucite tephrite...tephrite eruptives and dykes from the Batu Tara volcano, eastern Sunda arc. In general, the eruptives are |  | | Journal (article/letter/editorial) | | Pressure---Temperature Window of Eruptibility J. BARCLAY* AND I. S. E. CARMICHAEL CA 94720-4767, USA RECEIVED...a profound influence not only on the temperature and depth of melting of arc-related magmas (e.g. Kawamoto...influencing such processes as mixing, assimilation and differentiation (e.g. Gaetani et al., 1993; Sisson...& Grove 1993; Thomas & Tait, 1997; Hort, 1998), and ultimately controls the eruptive behaviour of the...most diverse range of magmatism found on Earth, exemplified by variations in composition and eruptive style |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1983) 84:107-145 9 Springer-Verlag...Ghiorso 1, Ian S.E. Carmichael 2, Mark L. Rivers 2, and Richard O. Sack 2'3 t Department of Geological Sciences...Sciences, University of Washington, Seattle, WA, 98195 and the Lawrence Berkeley Laboratory, University of California...Berkeley, CA, 94720, USA 2 Department of Geology and Geophysics and the Lawrence Berkeley Laboratory, University...olivine, plagioclase, clinopyroxene, orthopyroxene, leucite, spinel, rhombohedral oxide, melilite and potassium |
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