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Contents volume 37 (1990)
Journal of Geochemical Exploration, 37 (1990) 389-390
389
Elsevier Science Publishers B.V., A m s t e r d a m - - Printed in The Netherlands
Contents Volume 37 (1990) Special Issue Geochemistry of Platinum-Group Elements, edited by C.E. Dunn, G.C. Curtin and G.E.M. Hall Introduction ............................................................................................................................. vii The determination of Au, Pd and Pt in ashed vegetation by ICP-mass spectrometry and graphite furnace atomic absorption spectrometry G.E.M. Hall, J.-C. Pelchat and C.E. Dunn (Ottawa, Ont., Canada) ................................ 1 Simultaneous determination of noble metals, Re, Se, As and Sb by radiochemical neutron activation analysis G.E. Br0gmann (Mainz, F.R.G. and Toronto, Ont., Canada), M.P. Gorton and R.G.V. Hancock (Toronto, Ont., Canada) ......................................................................... 25 Interpretation of soil nitrite-ammonium ratios with possible application to pedogeochemical exploration for platinum mineralization P.J. Lechler and L.C. Hsu (Reno, Nev., U.S.A.) .............................................................. 37 As, Bi, Hg, S, Sb, Sn and Te geochemistry of the J-M Reef, Stillwater Complex, Montana: constraints on the origin of PGE-enriched sulfides in layered intrusions M.L. Zientek, T.L. Fries (Menlo Park, Calif., U.S.A. ) and R.W. Vian (Nye, Mont., U.S.A.) ...................................................................................... 51 Fractionation of palladium and platinum in a Mesozoic diabase sheet, Gettyburg basin, Pennsylvania: implications for mineral exploration D. Gottfried, A.J. Froelich, N. Rait and P.J. Aruscavage (Reston, Va., U.S.A. ) ............. 75 The use of metal ratios in prospecting for platinum-group element deposits in mafic and ultramafic intrusions S.-J. Barnes (Chicoutimi, Qur., Canada) ......................................................................... 91 Comparative geochemistry of platinum-group elements of nickel-copper sulfide occurrences associated with mafic-ultramafic intrusions in the Appalachian Orogen A.D. Paktunc (Ottawa, Ont., Canada) ............................................................................. 101 Platinum-group element abundance and distribution in chromite deposits of the Acoje Block, Zambales Ophiolite Complex, Philippines G.C. Bacuta Jr., R.W. Kay, Gibbs (Ithaca, N.Y., U.S.A.) and B.R. Lipin (Reston, Va., U.S.A.) .......................................................................................................................113 The distribution of halogens and carbon in PGE-bearing ultramafics of the Acoje ophiolite block, Zambales, Philippines B. Orberger, G. Friedrich and E. Woermann (Aachen, F.R.G. ) ....................................... 147
Research Papers Trace-metal content of Mississippi oil field brines J.A. Saunders and C.T. Swann (University, MS, U.S.A. ) ................................................ 171 Specific conductance and hydrogen ion concentration as indicators of trace-element geochemical response in humus: Rod Cu-Zn and Big Island Zn-Cu-Au deposits, Manitoba (Canada) K.J. Ferreira and M.A.F. Fedikow (Winnipeg, Man., Canada) ....................................... 185 Unmasking multivariate anomalous observations in exploration geochemical data from sheeted-vein tin mineralization near Emmaville, N.W.S., Australia C.Y. Chork (Kensington, N.S.W., Australia) ................................................................... 205
390 Interpretation of till geochemical data in Nova Scotia, Canada, using mapped till units, multi-element anomaly patterns, and the relationship of till clast geology to matrix geochemistry R.G. Turner and R.R. Stea (Halifax, N.S., Canada) ........................................................ A comparison of geochemical exploration techniques and sample media within accretionary continental margins: an example from the Pacific Border Ranges, Southern Alaska, U.S.A. S.J. Sutley, R.J. Goldfarb, R.M. O'Leary and R.B. Tripp (Denver, CO, U.S.A. ) ............ Mineral resource evaluation on the basis of soil metallometry J. Guba~ (Bratislava, Czecoslovakia ) ............................................................................... Application of infrared spectroscopy for rapid petroleum source rock evaluation O.T. Udo and E.E. Etuk (Calabar, Nigeria) ..................................................................... A geochemical sampling technique for use in areas of active alpine glaciation: an application from the central Alaska Range G.C. Stephens (Washington, D.C., U.S.A. ), E.B. Evenson (Bethlehem, Pa., U.S.A.) and D.E. Detra (Denver, Colo., U.S.A.) .......................................................................... Kimberlite xenocryst wear in high-energy fluvial systems: experimental studies T.E. McCandless (Cape Town, South Africa) .................................................................. Rb-Sr open-system behaviour and its application as a pathfinder for Sn mineralisation in granites of the Bushveld Complex, South Africa F. Walraven, J.H. Strydom and N. Strydom (Pretoria, South Africa) ............................. Birch sap as a tool for biogeochemical prospecting L. Harju and S.-G. Huldrn (Turku-,~bo, Finland) ........................................................... Geochemical exploration in the Jilov6 Belt: case history of the Celina deposit, Bohemian Massif, Czechoslovakia J. Janatka and P. Mor~ivek (Praha, Czechoslovakia) .......................................................
225
255 277 285
301 323
333 351
367
Book reviews Isotopes in the Earth Sciences, by Robert Bowen - - D.R. Cole ............................................. 385 Regional Geochemical Atlas, Great Glen, by British Geological Survey - - S.J. Hoffman .... 387
389
Elsevier Science Publishers B.V., A m s t e r d a m - - Printed in The Netherlands
Contents Volume 37 (1990) Special Issue Geochemistry of Platinum-Group Elements, edited by C.E. Dunn, G.C. Curtin and G.E.M. Hall Introduction ............................................................................................................................. vii The determination of Au, Pd and Pt in ashed vegetation by ICP-mass spectrometry and graphite furnace atomic absorption spectrometry G.E.M. Hall, J.-C. Pelchat and C.E. Dunn (Ottawa, Ont., Canada) ................................ 1 Simultaneous determination of noble metals, Re, Se, As and Sb by radiochemical neutron activation analysis G.E. Br0gmann (Mainz, F.R.G. and Toronto, Ont., Canada), M.P. Gorton and R.G.V. Hancock (Toronto, Ont., Canada) ......................................................................... 25 Interpretation of soil nitrite-ammonium ratios with possible application to pedogeochemical exploration for platinum mineralization P.J. Lechler and L.C. Hsu (Reno, Nev., U.S.A.) .............................................................. 37 As, Bi, Hg, S, Sb, Sn and Te geochemistry of the J-M Reef, Stillwater Complex, Montana: constraints on the origin of PGE-enriched sulfides in layered intrusions M.L. Zientek, T.L. Fries (Menlo Park, Calif., U.S.A. ) and R.W. Vian (Nye, Mont., U.S.A.) ...................................................................................... 51 Fractionation of palladium and platinum in a Mesozoic diabase sheet, Gettyburg basin, Pennsylvania: implications for mineral exploration D. Gottfried, A.J. Froelich, N. Rait and P.J. Aruscavage (Reston, Va., U.S.A. ) ............. 75 The use of metal ratios in prospecting for platinum-group element deposits in mafic and ultramafic intrusions S.-J. Barnes (Chicoutimi, Qur., Canada) ......................................................................... 91 Comparative geochemistry of platinum-group elements of nickel-copper sulfide occurrences associated with mafic-ultramafic intrusions in the Appalachian Orogen A.D. Paktunc (Ottawa, Ont., Canada) ............................................................................. 101 Platinum-group element abundance and distribution in chromite deposits of the Acoje Block, Zambales Ophiolite Complex, Philippines G.C. Bacuta Jr., R.W. Kay, Gibbs (Ithaca, N.Y., U.S.A.) and B.R. Lipin (Reston, Va., U.S.A.) .......................................................................................................................113 The distribution of halogens and carbon in PGE-bearing ultramafics of the Acoje ophiolite block, Zambales, Philippines B. Orberger, G. Friedrich and E. Woermann (Aachen, F.R.G. ) ....................................... 147
Research Papers Trace-metal content of Mississippi oil field brines J.A. Saunders and C.T. Swann (University, MS, U.S.A. ) ................................................ 171 Specific conductance and hydrogen ion concentration as indicators of trace-element geochemical response in humus: Rod Cu-Zn and Big Island Zn-Cu-Au deposits, Manitoba (Canada) K.J. Ferreira and M.A.F. Fedikow (Winnipeg, Man., Canada) ....................................... 185 Unmasking multivariate anomalous observations in exploration geochemical data from sheeted-vein tin mineralization near Emmaville, N.W.S., Australia C.Y. Chork (Kensington, N.S.W., Australia) ................................................................... 205
390 Interpretation of till geochemical data in Nova Scotia, Canada, using mapped till units, multi-element anomaly patterns, and the relationship of till clast geology to matrix geochemistry R.G. Turner and R.R. Stea (Halifax, N.S., Canada) ........................................................ A comparison of geochemical exploration techniques and sample media within accretionary continental margins: an example from the Pacific Border Ranges, Southern Alaska, U.S.A. S.J. Sutley, R.J. Goldfarb, R.M. O'Leary and R.B. Tripp (Denver, CO, U.S.A. ) ............ Mineral resource evaluation on the basis of soil metallometry J. Guba~ (Bratislava, Czecoslovakia ) ............................................................................... Application of infrared spectroscopy for rapid petroleum source rock evaluation O.T. Udo and E.E. Etuk (Calabar, Nigeria) ..................................................................... A geochemical sampling technique for use in areas of active alpine glaciation: an application from the central Alaska Range G.C. Stephens (Washington, D.C., U.S.A. ), E.B. Evenson (Bethlehem, Pa., U.S.A.) and D.E. Detra (Denver, Colo., U.S.A.) .......................................................................... Kimberlite xenocryst wear in high-energy fluvial systems: experimental studies T.E. McCandless (Cape Town, South Africa) .................................................................. Rb-Sr open-system behaviour and its application as a pathfinder for Sn mineralisation in granites of the Bushveld Complex, South Africa F. Walraven, J.H. Strydom and N. Strydom (Pretoria, South Africa) ............................. Birch sap as a tool for biogeochemical prospecting L. Harju and S.-G. Huldrn (Turku-,~bo, Finland) ........................................................... Geochemical exploration in the Jilov6 Belt: case history of the Celina deposit, Bohemian Massif, Czechoslovakia J. Janatka and P. Mor~ivek (Praha, Czechoslovakia) .......................................................
225
255 277 285
301 323
333 351
367
Book reviews Isotopes in the Earth Sciences, by Robert Bowen - - D.R. Cole ............................................. 385 Regional Geochemical Atlas, Great Glen, by British Geological Survey - - S.J. Hoffman .... 387