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Contents volume 113, 1994
ChemicalGeology, 113 (1994) 379-380 Elsevier Science B.V., Amsterdam
379
Contents Volume 113, 1994 VOL. l13, No. 1/2
Research Papers Geochemistry of Pliocene to Quaternary alkali basalts from the Huri Hills, northern Kenya C. Class, R. Altherr, F. Volker, G. Eberz and M.T. McCulloch ................................................................................. 1 Experiments on crystal/liquid partitioning ofRu, Rh and Pd for magnetite and hematite solid solutions crystallized from silicate melt C.J. Capobianco, R.L. Hervig and M.J. Drake ........................................................................................................... 23 Chemical profiles in K / T boundary section of Meghalaya, India: cometary, asteroidal or volcanic N. Bhandari, M. Gupta, J. Pandey and P.N. Shukla .................................................................................................. 45 A new low-level HPLC technique for quantitative determination of niobium in rocks M. Rehk~imper ............................................................................................................................................................ 61 Partial melting during the evolution of the amphibolite- to granulite-facies gneisses of the Ivrea Zone, northern Italy B. Schnetger ................................................................................................................................................................ 71 Cyclohexylbenzenes in crude oils R. Alexander, R.W. Baker, R.I. Kagi and B. Warton ................................................................................................. 103 A biomarker study of immature crude oils from the Shengli oilfield, People's Republic of China Z. Chen, Z. Guangjia and R. Alexander ....................................................................................................................117
Isotope Geoscience Section Research Papers Equilibrium and kinetic nitrogen and oxygen isotope fractionations between dissolved and gaseous N20 H.Y. Inoue and W.G. Mook .......................................................................................................................................135 Emplacement ages of kimberlite occurrences in the Prieska region, southwest border of the Kaapvaal Craton, South Africa C.B. Smith, T.C. Clark, E.S. Barton and J.W. Bristow ............................................................................................... 149 Ion microprobe U - P b zircon geochronology of granitic magmatism in the Western Province of the South Island, New Zealand R.J. Muir, T.R. Ireland, S.D. Weaver and J.D. Bradshaw ......................................................................................... 171 VOL. 113, No. 3/4
Research Papers Characterization of spinel peridotites by olivine-spinel compositional relationships: Review and interpretation S. Arai .........................................................................................................................................................................191 Petrogenesis of Cambro-Ordovician subduction-related granitic magmas of the Qu6bec Appalachians, Canada A. Tremblay, M.R. Lafl~che, R.H. McNutt and M. Bergeron .................................................................................... 205 Rare-earth element characteristics and origin of the Sudbury Igneous Complex, Ontario, Canada G. Chai and R. Eckstrand ...........................................................................................................................................221 Compositions of pegmatoids beneath the J-M Reef of the Stillwater Complex, Montana, U.S.A. K. Braun, W. Meurer, A.E. Boudreau and I.S. McCaUum ......................................................................................... 245 REE composition of an aqueous magmatic fluid: A fluid inclusion study from the Capitan Pluton, New Mexico, U.S.A. D.A. Banks, B.W.D. Yardley, A.R. Campbell and K.E. Jarvis ...................................................................................259 Growth history of a hydrothermal silica chimney from the Mariana backarc spreading center (southwest Pacific, 18°13'N) D. StiJben, N. Eddine Taibi, G.M. McMurtry, J. Scholten, P. Stoffers and D. Zhang ............................................... 273
0009-2541/94/$07.00 © 1994 Elsevier Science B.V. All rights reserved.
380
CONTENTS VOLUME 113, 1994
Thermodynamic zonation in the black shale facies based on iron-manganese-vanadiumcontent M.S. Quinby-Hunt and P. Wilde ................................................................................................................................ The influence of hematite on the sorption of uranium (VI) onto granite filling fractures I. Casas, D. Casabona, L. Duro and J. De Pablo ........................................................................................................ The chemical signature of source rocks in size fractions of Holocene stream sediment derived from metamorphic rocks in the Wet Mountains region, Colorado, U.S.A. R.L. Cullers .................................................................................................................................................................
297 319
327
Isotope Geoscience Section Research Paper Mineralogical, K-Ar, stable and Sr isotope systematics of K-white micas during very low-grade metamorphism of limestones (Helvetic nappes, western Switzerland) S. Huon, M. Burkhard and J.-C. Hunziker .................................................................................................................
347
Book Review The GeochemicalAtlas o f Finland-- Part 2: Till by T. Koljonen (Editor) - - U. Siewers .............................................
377
Contents Volume 113, 1994 .............................................................................................................................................379
379
Contents Volume 113, 1994 VOL. l13, No. 1/2
Research Papers Geochemistry of Pliocene to Quaternary alkali basalts from the Huri Hills, northern Kenya C. Class, R. Altherr, F. Volker, G. Eberz and M.T. McCulloch ................................................................................. 1 Experiments on crystal/liquid partitioning ofRu, Rh and Pd for magnetite and hematite solid solutions crystallized from silicate melt C.J. Capobianco, R.L. Hervig and M.J. Drake ........................................................................................................... 23 Chemical profiles in K / T boundary section of Meghalaya, India: cometary, asteroidal or volcanic N. Bhandari, M. Gupta, J. Pandey and P.N. Shukla .................................................................................................. 45 A new low-level HPLC technique for quantitative determination of niobium in rocks M. Rehk~imper ............................................................................................................................................................ 61 Partial melting during the evolution of the amphibolite- to granulite-facies gneisses of the Ivrea Zone, northern Italy B. Schnetger ................................................................................................................................................................ 71 Cyclohexylbenzenes in crude oils R. Alexander, R.W. Baker, R.I. Kagi and B. Warton ................................................................................................. 103 A biomarker study of immature crude oils from the Shengli oilfield, People's Republic of China Z. Chen, Z. Guangjia and R. Alexander ....................................................................................................................117
Isotope Geoscience Section Research Papers Equilibrium and kinetic nitrogen and oxygen isotope fractionations between dissolved and gaseous N20 H.Y. Inoue and W.G. Mook .......................................................................................................................................135 Emplacement ages of kimberlite occurrences in the Prieska region, southwest border of the Kaapvaal Craton, South Africa C.B. Smith, T.C. Clark, E.S. Barton and J.W. Bristow ............................................................................................... 149 Ion microprobe U - P b zircon geochronology of granitic magmatism in the Western Province of the South Island, New Zealand R.J. Muir, T.R. Ireland, S.D. Weaver and J.D. Bradshaw ......................................................................................... 171 VOL. 113, No. 3/4
Research Papers Characterization of spinel peridotites by olivine-spinel compositional relationships: Review and interpretation S. Arai .........................................................................................................................................................................191 Petrogenesis of Cambro-Ordovician subduction-related granitic magmas of the Qu6bec Appalachians, Canada A. Tremblay, M.R. Lafl~che, R.H. McNutt and M. Bergeron .................................................................................... 205 Rare-earth element characteristics and origin of the Sudbury Igneous Complex, Ontario, Canada G. Chai and R. Eckstrand ...........................................................................................................................................221 Compositions of pegmatoids beneath the J-M Reef of the Stillwater Complex, Montana, U.S.A. K. Braun, W. Meurer, A.E. Boudreau and I.S. McCaUum ......................................................................................... 245 REE composition of an aqueous magmatic fluid: A fluid inclusion study from the Capitan Pluton, New Mexico, U.S.A. D.A. Banks, B.W.D. Yardley, A.R. Campbell and K.E. Jarvis ...................................................................................259 Growth history of a hydrothermal silica chimney from the Mariana backarc spreading center (southwest Pacific, 18°13'N) D. StiJben, N. Eddine Taibi, G.M. McMurtry, J. Scholten, P. Stoffers and D. Zhang ............................................... 273
0009-2541/94/$07.00 © 1994 Elsevier Science B.V. All rights reserved.
380
CONTENTS VOLUME 113, 1994
Thermodynamic zonation in the black shale facies based on iron-manganese-vanadiumcontent M.S. Quinby-Hunt and P. Wilde ................................................................................................................................ The influence of hematite on the sorption of uranium (VI) onto granite filling fractures I. Casas, D. Casabona, L. Duro and J. De Pablo ........................................................................................................ The chemical signature of source rocks in size fractions of Holocene stream sediment derived from metamorphic rocks in the Wet Mountains region, Colorado, U.S.A. R.L. Cullers .................................................................................................................................................................
297 319
327
Isotope Geoscience Section Research Paper Mineralogical, K-Ar, stable and Sr isotope systematics of K-white micas during very low-grade metamorphism of limestones (Helvetic nappes, western Switzerland) S. Huon, M. Burkhard and J.-C. Hunziker .................................................................................................................
347
Book Review The GeochemicalAtlas o f Finland-- Part 2: Till by T. Koljonen (Editor) - - U. Siewers .............................................
377
Contents Volume 113, 1994 .............................................................................................................................................379