CHEMICAL GEOLOGY ISOTOPE GEOSCIEN( 'E Chemical Geology 120 (1995) 397-398 Contents Volume 120, 1995 VOL. 120, NOS. 1-2 Research papers Diffusion of noble gases in melts of the system Si0,-NaAlSi,O0, K. Roselieb, W. Rammensee, H. Biittner and M. Rosenhauer Isotope and trace-element geochemistry of Proterozoic Natkusiak flood basalts from the northwestern Canadian Shield C. Dupuy, A. Michard, J. Dostal, D. Dautel and W.R.A. Baragar Rare-earth elements and isotopes (Sr, Nd, O, C) in minerals from the Juquia carbonatite (Brazil): tracers of a multistage evolution A.-V. Walter, R. Flicoteaux, C. Parron, M. Loubet and D. Nahon Petrogenesis of the Proterozoic Athabasca Basin, northern Saskatchewan, Canada, and its relation to diagenesis, hydrothermal uranium mineralization and paleohydrogeology T.G. Kotzer and T.K. Kyser Development and application of a sensitive and rapid analytical method to determine the rare-earth elements in surface waters G.E.M. Hall, J.E. Vaive and J.W. McConnell Extraction studies of heavy-metal pollutants in surficial sediments from the southern Baltic Sea off Poland P. Szefer, G.P. Glasby, J. Pempkowiak and R. Kaliszan 32 Si in limestone aquifers U. Morgenstern, R. Gellermann, D. Hebert, I. Borner, W. Stolz, R. Vaikmae, R. Rajamde and H. Putnik Chemical and boron isotope compositions of non-marine brines from the Qaidam Basin, Qinghai, China A. Vengosh, A.R. Chivas, A. Starinsky, Y. Kolodny, Z. Baozhen and Z. Pengx1................sccsscescesscesseecerscescesscesceesecsceeneees 135 Tricyclic terpanes in Precambrian bituminous sandstone from the eastern Yanshan region, North China T.-G. Wang and B.R.T. Simoneit Erratum Isotope Geoscience Section Research Papers Uranium-series dating of carnotites: concordance between 7°°Th and 73'Pa ages A. Kaufman, T.-L. Ku and S. Luo Nitrogen, helium and argon in basalt: a static mass spectrometry study B. Marty, M. Lenoble and N. Vassard EAG News VOL. 120, NOS. 3-4 Special Issue “Chemical Evolution of the Mantle”, by W.F. McDonough, N.T. Arndt and S. Shirey (Editors) Preface, by W.F. McDonough, N.T. Arndt and S. Shirey (Editors) 0009-2541 /95/$09.50 © 1995 Elsevier Science B.V. All rights reserved SSDI 0009-2541 398 Contents Volume 120, 1995 / Chemical Geology 120 (1995) 397-398 List of Members of Commissiofno r Igneous and Metamorphic Petrogenesis ........cccccccccscscssscsscscssccesscsssessscsessssesecsscccesscesssessceess Vv Temperature and chemistry of the core-mantle boundary R. Boehler, A. Chopelas and A. Zerr Melting relations of peridotite and the density crossover in planetary mantles sc ROUUN NNR ee MMPNPIESR ETP A OMENU CD CORNED cs casivccs cas vs case Lesion ssee eo vose veda sy acaonsasWavus nad bausstadavedawvanwoceveceSareaductevecovapeeres 2 The composition of the Earth W.F. McDonough and S.-s. Sun Experimental petrochemistry of some highly siderophile elements at high temperatures, and some implications for core formation and the mantle’s early history PSLC. Neal 19s. mewen. A. Borisov, B. Spettel Andi: PANN sc ..:55casvicecinassndssesscicsvessiecs<sdeesuetevcsendepencdeteaseceeceacvetsnss 295 Peridotite xenoliths in alkali basalts from the Sikhote-Alin, southeastern Siberia, Russia: trace-element signatures of mantle beneath a convergent continental margin BY PA SPNDUNN Wd MINN ONENESS PRIN 5555 ps3 cas cio nce docs cc noes cunecsnescuvntipcuid boteccuncasetecocesseressbateivesneeesec ecuanmePteo aese s 275 The nature of the sub-continental mantle: constraints from the major-element composition of continental flood basalts $k ROEM MAUD Ao ReaD goo scans sa'soa ps cca upsececscansnden sesaupseasonet cocoon cestoust saves wocsbasavcdasseseeasin teacecaesd ses Ranier 295 Geochemical characteristics of lavas from Broken Ridge, the Naturaliste Plateau and southernmost Kerguelen Plateau: Cretaceous plateau volcanism in the southeast Indian Ocean J.J. Mahoney, W.B. Jones, F.A. Frey, V.J.M. Salters, D.G. Pyle and H.L. Davies 315 Significance of Nb/Ta as an indicator of geochemical processes in the crust-mantle system T.H. Green Geochemistry of mafic magmas from the Ungava orogen, Québec, Canada, and implications for mantle reservoir compositions at 2.0 Ga J.M. Dunphy, J.N. Ludden and D. Francis PNEUPRINT NCES NSEC Uae iiss dusod sarc veeue tae peseeaeecet aS Mine oie es at 25 8 Se i ee 381 Cir a Mee Ta (1 LS1 c Re OE A LOY eS OC nD RU Ra PeMO Meer EO oer TR ERR OPE EPS S nPRE Sa Se G2 UY 397