Note: Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Organization -- Volume I -- Plenary presentations -- The silicification of microorganisms: a comparison between in situ experiments in the field and laboratory -- Control of dilation and collapse during weathering and soil formation on Hawaiian basalts -- Chemical weathering in steady-state orogens - examples from the Himalaya and Southern Alps -- Origin of the carbon dissolved in the groundwater and derivation of Earth diffuse emission of CO[sub(2)]: the case of the Italian Peninsula -- Chlorine stable isotopes in sedimentary systems: does size matter? -- Arsenic mobilization from contaminated sediments: a full-scale experiment in progress -- Polymeric silicate complexing in aqueous fluids at high pressure and temperature, and its implications for water-rock interaction -- Volcanic-geothermal water-rock interactions and degassing: a Symposium in memory of Donald White -- Yellowstone Caldera inflation-deflation and hydrothermal C1 flux revisited -- Oxidation reactions for reduced Fe, As, and S in thermal outflows of Yellowstone National Park: biotic or abiotic? -- Chemical aspects of exploration of the Theistareykir high-temperature geothermal area, N-E Iceland -- The source and relative age of non-thermal and up to 90°C ground waters in the Skagafjördur tholeiite flood basalt province, N-Iceland -- Modeling hydrothermal alteration in the Pinatubo Geothermal Field, Philippines -- Sulfur stable isotope ratios of the Mt. Apo geothermal fluid, Philippines -- Diffuse CO[sub(2)] degassing from summit areas on Mt. Hood, Oregon, USA -- Geochemical evolution of the young crater lake of Kelud volcano in Indonesia -- Evidence of mantle derived fluid contributions to the thermal basins of Western Sicily: geotectonic and geodynamic implications. , Experimentation of an automatic continuous monitoring station in a thermal well of Stromboli volcanic island (Italy) -- Diffuse soil CO[sub(2)] degassing at Salcheto (Tuscany) and Lipary (Sicily): a probabilistic approach to mapping and quantification of gas release -- Chemical composition and formation of thermal waters in Kuril's Islands (Far East Russia) -- Major, trace, and rare earth elements in the surface waters of two areas of the Kuril Islands -- Helium and carbon isotopic evidence for the relationship between outgassing and structure in the East African Rift System -- A gas transfer study at Ojo Caliente, Yellowstone National Park, USA -- Transport of injected isobutane by thermal groundwater in Long Valley caldera, California, USA -- Relationships between structural boundaries, fluid circulation and permeability changes during the 2002-2003 Stromboli eruptive crisis -- Thermal springs at Colombian active volcanoes -- A hydrologic-hydrochemical model for the Troitsky crater lake, Maly Semyachik, Kamchatka -- Nitrogen transformations in hot spring runoff, Yellowstone National Park, USA -- The geochemistry of geothermal waters in the Alvord Basin, southeastern Oregon -- The scaling relationship between self-potential and fluid flow on Masaya volcano, Nicaragua -- The feasibility of using yttria-stabilized ZrO[sub(2)] sensors for pH measurements in geothermal field and industrial applications -- Insight into the hydrothermal system of Papandayan volcano, Indonesia -- Magmatic and fossil components of thermal and mineral waters in the Eger River continental rift (Bohemian massif, central Europe) -- Hydrothermal activity at Tacana volcano, Mexico-Guatemala -- Fluid geochemistry data processing for integrated assessment of Japanese geothermal resources using GIS: a case study for the Hohi area, Kyushu. , Transition metals distribution in the rocks from Sierra-Leone Fracture Zone (Central Atlantic) -- Kr-81 and water-rock interactions on a million-year time scale -- Evidence for metastable equilibrium between hydrocarbons in volcanic gases -- Intrusion, degassing and hydrothermal systems in submarine felsic volcanic centers -- Hydrochemical evolution of the Na-HCO[sub(3)]-type groundwater from northern Sikhote-Alin (Far East Russia) -- Chloride in hot springs of the Cascade volcanic arc - the source puzzle -- The magmato-hydrothermal system at Copahue volcano, Argentina -- Measurement of trace gas species at White Island volcano, New Zealand, using chemical traps -- Monitoring CO[sub(2)] emissions at White Island volcano, New Zealand: evidence for total decreases in magmatic mass and heat output -- Modeling study of WRI in the Bakki low-temperature geothermal field, south-west Iceland -- Stable chlorine isotopic composition of geothermal waters from Yellowstone National Park -- Experimental study of water-rock interaction in active geothermal fields: Los Azufres, Mexico -- Crustal fluid-rock interactions, mass transfer and cycling of volatiles -- The isotopic heterogeneity of C in metamorphic complexes -- Dating fluid infiltration using monazite -- High-precision isotopic analysis of nanomole quantities of silicate N -- Mineral chemical records of prograde devolatilization in Alpine HP/UHP metasediments -- Geochemistry of quartz and calcite veins in a paleoaccretionary complex -- Modeling contact metamorphism of siliceous dolomite via kinetic control of overall reactions -- Sulfur geochemistry of Paleozoic rocks, U.S. mid-continent: implications for large-scale fluid flow and ore genesis -- About the role of water in the metamorphic alteration of ultrabasic rocks -- Contribution of fertilization practices to nitrate contamination of groundwater. , Mineralogy and mobility of chemical elements at water-basalt interaction, Hole 504B -- Water-rock interaction responsible for the origin of high pH mineral waters (S. Portugal) -- Role of water-rock interaction in the formation of La Azul fluorite deposit, southern Mexico -- Barite as an indicator of cross-formational fluid flow -- Micropore-diffusion catalytic effect significance in water-rock interaction -- Fluid-rock interactions within Paleoproterozoic Au mineralization of the Sakoli Group, India -- Influence of grain boundary energy on fluid distribution in deep-seated rocks -- Kinetics study of silicate mineral dissolution in water at high temperatures near the critical point of water -- Water-rock interactions in groundwater systems and sedimentary basins -- Geothermal potential of thermal waters of Manikaran, Himachal Pradesh, India -- Geochemical and isotope features of brines of the Siberian platform -- Modeling of tracer behaviour and dominant reactions during the Pore Water Chemistry (PC) experiment in the Opalinus Clay, Switzerland -- Aspects of groundwater geochemistry from Middle Atlas and Saiss basin (Northern Morocco) -- Processes affecting groundwater quality in a basalt aquifer system in southern Australia -- Rapid growth of meter-scale calcite speleothems in the Mission Tunnel, Santa Barbara, CA -- U transport at Itataia U-deposit, Brazil -- Smectite-to-illite reaction vs. quartz kinetics in shale from the Haltenbanken area -- Origin of brines from the Bachu Uplift, Tarim Basin, China: chemistry and δ[sub(11)]B evidence -- Use of a gel probe sampling device to examine porewater profiles and the effects of porewater composition on As sorption in sediments -- [sup(14)]C and [sup(36)]CI as indicators of groundwater flow, Bland Catchment, NSW -- Hydrogeology of the Goulburn Valley, Murray Basin, Australia. , Mobilization of F- from rocks and soils in groundwater, Morel River basin, Rajasthan, India -- Geochemical baseline as basis for the European Groundwater Directive -- Geochemistry of groundwater in the Gharb plain aquifers (Northern-Morocco) -- Hydrogeochemistry of the Lake Cooper region, Murray Basin -- Origin of dolomites in the phosphatic Upper Cretaceous Duwi Formation, Eastern Desert, Egypt -- Groundwater age, chemistry and evolution in fractured granite, Uveghuta, Hungary -- Geochemical characteristics in the coastal aquifer of the Mamora plain -- Earthquakes influencing geothermal water-rock interaction in Iceland -- Fracture-related geochemical controls on As concentrations in ground-water -- Renewal of Fe used to remove TCE in simulated high alkalinity groundwater by ultrasound -- Processes controlling groundwater chemistry of a coastal area in SE Sardinia (Italy) -- New method for porewater extraction from claystone and determination of transport properties with results for Opalinus Clay (Switzerland) -- [sub(13)]C enrichments in periglacial biogenic carbonates may be due to acetogenic processes instead of methanogenesis -- Why are recent groundwaters sea-tagged and fresh, whereas formation waters are brine-tagged and saline? -- Impact of Pleistocene glaciation on hydrogeochemistry of Devonian carbonate groundwaters, northern margin Michigan Basin -- Incipient alteration of biotite by groundwater in fractured rock -- Hydrochemistry of groundwater on both sides of the Jordan - Dead Sea - Arava transfonn fault -- U-series evidence of water-rock interaction at Yucca Mountain, Nevada, USA -- The evolution of groundwater in the Tyrrell region, south-central Murray Basin, Victoria, Australia -- Geochemical and isotopic study of groundwaters in Cerro Prieto, BC, Mexico. , Chemical and isotopic characteristics and origin of high-pH thennal springs near Acapulco, State of Guerrero, México.