xSE ENP S AN AED AE~ © 0524) > )C 3, CHEMICAL as » LX > Ns aN ‘4 GEOLOGY ms) a) ’ ELSEBAVTYI + ISOTOPE INGCLUEDIONGS CIENCE ER Chemical Geology 133 (1996) 317-318 Contents Volume 133, 1996 Research papers Biomarker distributions in oils from the Akita and Niigata Basins, Japan A. Chakhmakhchev, N. Suzuki, M. Suzuki and K. Takayama .... 1... 2 wee eee ee ee ee we ee te ee ee ees l Steady-state modelling of biogeochemical processes in columns with aquifer material. 1. Speciation and mass balances GC. Pee, GU, Wath GOAN GUNN D. Bc ok eho els eee Re ORDO ee D OOK ee hee ee eee eed Os 15 Coesite-bearing eclogites from the Bixiling Complex, Dabie Mountains, China: Sm—Nd ages, geochemical characteristics and tectonic implications pee GL SPREE ER TET TET RT TE CECE CECE Ta LL 29 Monte Carlo simulation of H,O—CO, mixtures to 1073.15 K and 30 kbar CP, COVED, Sr. OC ORD ET, WOOD on ttc ee ee KM ROHR EES T HE KE Beeweodesees 53 Geochemical characterization of the Luochuan loess—paleosol sequence, China, and paleoclimatic implications BS. GOSTeOS, MG, SR A BOM 6 cc tee wer eee eee eee See ORES SOBER HEH HEHE R OOS 67 Petrology, geochemistry, and Na metasomatism of Triassic—Jurassic non-marine clastic sediments in the Newark, Hartford, and Deerfield rift basins, northeastern USA PA. VE GP TG GRE GL EG kn ce ee cece RHE U HOH Oe Oh eet 0 6 Ob 8 8 8 6% 80 ee 68 HOO Oe e 6 wes 89 Geochemistry of the rare-earth elements in hypersaline and dilute acidic natural terrestrial waters: Complexation behavior and middle rare-earth element enrichments K.H. Johannesson, W.B. Lyons, M.A. Yelken, H.E. Gaudette and K.J. Stetzenbach .. 6... oe eee ee ee ee es 125 Microanalysis of minerals by an Excimer UV-LA-ICP-MS system PP. Se, ©. NO, Fa, DU EEE be See ee S eRe mde Ce EROS HD OHKERD CP OHM MOSS OWS BO 145 H,S-producing reactions in deep carbonate gas reservoirs: Khuff Formation, Abu Dhabi eS oy ee ee ere ae ee eee ee ee 2 ee ee ee eer rea 157 Trace-element and U-Pb isotope compositions of pyrite types in the Proterozoic Black Reef, Transvaal Sequence, South Africa: Implications on genesis and age FS PPE SCE TATA AEE LORETO EEE EEE LETC 173 Methane concentration profiles in a lake with a permanently anoxic hypolimnion (Lake Lugano, Switzerland-Italy) R. Liu, A. Hofmann, F.O. Giilagar, P.-Y. Favarger and J. Dominik .. 2... 1 ee ee es 201 Trace-element geochemistry of Onion Creek near Van Stone lead—zinc mine (Washington, USA) — Chemical analysis and geochemical modeling F, CRU GG OE, BIG 5 nk ee eee eK RRO eee RED SHORE RoR Oe EMA HORE SEEDS Oe 211 Resetting of Sm—Nd systematics during metamorphism of > 3.7-Ga rocks: implications for isotopic models of early Earth differentiation <h, GEOR, B. SUR, EET GE LGA GE gb cc cee ee meee ee eee eee eeeeeeseresseebi Isotope Geoscience Section Pb--Pb isotope systematics on diagenetic clays: an example from Proterozoic black shales of the Franceville basin (Gabon) RS eee eS ee, ee ee ee Te ee a ee oe ee ee eo 2 243 Non-biogenic graphite in 3.8-Ga metamorphic rocks from the Isua district, Greenland H. Naraoka, M. Ohtake, S. Maruyama and Hiroshi Ohmoto. ... 2... 2... eee eee ee eee ee ee eee eee eens 251 Meteoric water induced selvage-style greisen alteration in the Achala Batholith, central Argentina ap ee, ek Nn I I ok. cw 0-5 koe BO 6 6 004 66 0 SO SE BO 8 Ooh h Oe 68 ees 8 8 8 261 Carbon and hydrogen isotope fractionation during oxidation of methane by metal oxides at temperatures from 400° to 530°C pm STEERER ELUM RV rT CC LER ELLE CULULEEETEEL CETTE 318 Contents Volume 133, 1996 Carbon and oxygen isotope study of hydrothermal carbonates in the zinc—lead deposits of the San Vicente district, central Peru: a quantitative modeling on mixing processes and CO, degassing J. Spangenberg, L. Fontboté, Z.D. Sharp and J. Hunziker Contents Volume 133