ALBERT

Anmerkung: Hydrocarbon systems, by nature, are a complex interplay of elements that must be spatially and temporally aligned to result in the generation and preservation of subsurface hydrocarbon accumulations. To meet the increasing challenges of discovering hydrocarbon resources, it is essential that we advance our understanding of these systems through new geochemical approaches and analytical developments. Such development requires that academic- and industry-led research efforts converge in ways that are unique to the geosciences. The aim of this volume is to bring together a multidisciplinary geochemical community from industry and academia working in hydrocarbon systems to publish recent advances and state-of-the-art approaches to resolve the many remaining questions in hydrocarbon systems analysis. From Source to Seep presents geochemical and isotopic studies that are grouped into three themes: (1) source-rock identification and the temperature/timing of hydrocarbon generation; (2) mechanisms and time-scales associated with hydrocarbon migration, trapping, storage and alteration; and (3) the impact of fluid flow on reservoir properties. | Contents: Geochemical applications in petroleum systems analysis: new constraints and the power of integration / M. Lawson, M. J. Formolo, L. Summa and J. M. Eiler / Geological Society, London, Special Publications, 468, 1-21, 19 February 2018, https://doi.org/10.1144/SP468.6 --- Source-rock identification and the temperature/timing of hydrocarbon generation --- The utility of methane clumped isotopes to constrain the origins of methane in natural gas accumulations / Daniel A. Stolper, Michael Lawson, Michael J. Formolo, Cara L. Davis, Peter M. J. Douglas and John M. Eiler / Geological Society, London, Special Publications, 468, 23-52, 14 December 2017, https://doi.org/10.1144/SP468.3 --- The isotopic structures of geological organic compounds / John M. Eiler, Matthieu Clog, Michael Lawson, Max Lloyd, Alison Piasecki, Camilo Ponton and Hao Xie / Geological Society, London, Special Publications, 468, 53-81, 14 December 2017, https://doi.org/10.1144/SP468.4 --- Vanadium isotope composition of crude oil: effects of source, maturation and biodegradation / Yongjun Gao, John F. Casey, Luis M. Bernardo, Weihang Yang and K. K. (Adry) Bissada / Geological Society, London, Special Publications, 468, 83-103, 14 December 2017, https://doi.org/10.1144/SP468.2 --- Carbon and hydrogen isotopic compositions of n-alkanes as a tool in petroleum exploration / Nikolai Pedentchouk and Courtney Turich / Geological Society, London, Special Publications, 468, 105-125, 14 December 2017, https://doi.org/10.1144/SP468.1 --- Mechanisms and time-scales associated with hydrocarbon migration, trapping, storage and alteration --- Noble gases in conventional and unconventional petroleum systems / David J. Byrne, P. H. Barry, M. Lawson and C. J. Ballentine / Geological Society, London, Special Publications, 468, 127-149, 14 December 2017, https://doi.org/10.1144/SP468.5 --- Differentiating between biogenic and thermogenic sources of natural gas in coalbed methane reservoirs from the Illinois Basin using noble gas and hydrocarbon geochemistry / Myles T. Moore, David S. Vinson, Colin J. Whyte, William K. Eymold, Talor B. Walsh and Thomas H. Darrah / Geological Society, London, Special Publications, 468, 151-188, 18 January 2018, https://doi.org/10.1144/SP468.8 --- The impact of fluid flow on reservoir properties --- Testing clumped isotopes as a reservoir characterization tool: a comparison with fluid inclusions in a dolomitized sedimentary carbonate reservoir buried to 2–4 km / John M. MacDonald, Cédric M. John and Jean-Pierre Girard / Geological Society, London, Special Publications, 468, 189-202, 14 December 2017, https://doi.org/10.1144/SP468.7

Anmerkung: Berlin, Freie Univ., Diss., 2006

Anmerkung: L. M. Parson, C. L. Walker, and D. R. Dixon: Hydrothermal vents and processes / Geological Society, London, Special Publications, 87:1-2, doi:10.1144/GSL.SP.1995.087.01.01 --- C. R. German, E. T. Baker, and G. Klinkhammer: Regional setting of hydrothermal activity / Geological Society, London, Special Publications, 87:3-15, doi:10.1144/GSL.SP.1995.087.01.02 --- Sergey G. Krasnov, Irina M. Poroshina, and Georgiy A. Cherkashev: Geological setting of high-temperature hydrothermal activity and massive sulphide formation on fast- and slow-spreading ridges / Geological Society, London, Special Publications, 87:17-32, doi:10.1144/GSL.SP.1995.087.01.03 --- Bramley J. Murton, Cindy Van Dover, and Eve Southward: Geological setting and ecology of the Broken Spur hydrothermal vent field: 29°10′N on the Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:33-41, doi:10.1144/GSL.SP.1995.087.01.04 --- S. G. Krasnov, G. A. Cherkashev, T. V. Stepanova, B. N. Batuyev, A. G. Krotov, B. V. Malin, M. N. Maslov, V. F. Markov, I. M. Poroshina, M. S. Samovarov, A. M. Ashadze, L. I. Lazareva, and I. K. Ermolayev: Detailed geological studies of hydrothermal fields in the North Atlantic / Geological Society, London, Special Publications, 87:43-64, doi:10.1144/GSL.SP.1995.087.01.05 --- Edward T. Baker: Characteristics of hydrothermal discharge following a magmatic intrusion / Geological Society, London, Special Publications, 87:65-76, doi:10.1144/GSL.SP.1995.087.01.06 --- J. M. Edmond, A. C. Campbell, M. R. Palmer, G. P. Klinkhammer, C. R. German, H. N. Edmonds, H. Elderfield, G. Thompson, and P. Rona: Time series studies of vent fluids from the TAG and MARK sites (1986, 1990) Mid-Atlantic Ridge: a new solution chemistry model and a mechanism for Cu/Zn zonation in massive sulphide orebodies / Geological Society, London, Special Publications, 87:77-86, doi:10.1144/GSL.SP.1995.087.01.07 --- G. P. Klinkhammer, C. S. Chin, C. Wilson, and C. R. German: Venting from the Mid-Atlantic Ridge at 37°17′N: the Lucky Strike hydrothermal site / Geological Society, London, Special Publications, 87:87-96, doi:10.1144/GSL.SP.1995.087.01.08 --- R. H. James, H. Elderfield, M. D. Rudnicki, C. R. German, M. R. Palmer, C. Chin, M. J. Greaves, E. Gurvich, G. P. Klinkhammer, E. Ludford, R. A. Mills, J. Thomson, and A. C. Williams: Hydrothermal plumes at Broken Spur, 29°N Mid-Atlantic Ridge: chemical and physical characteristics / Geological Society, London, Special Publications, 87:97-110, doi:10.1144/GSL.SP.1995.087.01.09 --- M. R. Palmer, E. M. Ludford, C. R. German, and M. D. Lilley: Dissolved methane and hydrogen in the Steinahóll hydrothermal plume, 63°N, Reykjanes Ridge / Geological Society, London, Special Publications, 87:111-120, doi:10.1144/GSL.SP.1995.087.01.10 --- Rachel A. Mills: Hydrothermal deposits and metalliferous sediments from TAG, 26°N Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:121-132, doi:10.1144/GSL.SP.1995.087.01.11 --- F. M. Stuart, P. J. Harrop, R. Knott, A. E. Fallick, G. Turner, Y. Fouquet, and D. Rickard: Noble gas isotopes in 25 000 years of hydrothermal fluids from 13°N on the East Pacific Rise / Geological Society, London, Special Publications, 87:133-143, doi:10.1144/GSL.SP.1995.087.01.12 --- Penny Dickson, Adam Schultz, and Andrew Woods: Preliminary modelling of hydrothermal circulation within mid-ocean ridge sulphide structures / Geological Society, London, Special Publications, 87:145-157, doi:10.1144/GSL.SP.1995.087.01.13 --- A. Rachel Pascoe and Johnson R. Cann: Modelling diffuse hydrothermal flow in black smoker vent fields / Geological Society, London, Special Publications, 87:159-173, doi:10.1144/GSL.SP.1995.087.01.14 --- Rowena C. Duckworth, Richard Knott, Anthony E. Fallick, David Rickard, Bramley J. Murton, and Cindy Van Dover: Mineralogy and sulphur isotope geochemistry of the Broken Spur sulphides, 29°N, Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:175-189, doi:10.1144/GSL.SP.1995.087.01.15 --- Steven D. Scott and Raymond A. Binns: Hydrothermal processes and contrasting styles of mineralization in the western Woodlark and eastern Manus basins of the western Pacific / Geological Society, London, Special Publications, 87:191-205, doi:10.1144/GSL.SP.1995.087.01.16 --- Richard Knott, Anthony E. Fallick, David Rickard, and Harald Bäcker: Mineralogy and sulphur isotope characteristics of a massive sulphide boulder, Galapagos Rift, 85°55′W / Geological Society, London, Special Publications, 87:207-222, doi:10.1144/GSL.SP.1995.087.01.17 --- G. A. Cherkashev: Hydrothermal input into sediments of the Mid-Atlantic Ridge / Geological Society, London, Special Publications, 87:223-229, doi:10.1144/GSL.SP.1995.087.01.18 --- R. A. Hodkinson and D. S. Cronan: Hydrothermal sedimentation at ODP Sites 834 and 835 in relation to crustal evolution of the Lau Backarc Basin / Geological Society, London, Special Publications, 87:231-248, doi:10.1144/GSL.SP.1995.087.01.19 --- S. M. Sudarikov, M. P. Davydov, V. L. Bazelyan, and V. G. Tarasov: Distribution and transformation of Fe and Mn in hydrothermal plumes and sediments and the potential function of microbiocoenoses / Geological Society, London, Special Publications, 87:249-255, doi:10.1144/GSL.SP.1995.087.01.20 --- Cindy Lee van Dover: Ecology of Mid-Atlantic Ridge hydrothermal vents / Geological Society, London, Special Publications, 87:257-294, doi:10.1144/GSL.SP.1995.087.01.21 --- Bruce Shillito, Jean-Pierre Lechaire, Gérard Goffinet, and Francoise Gaill: Composition and morphogenesis of the tubes of vestimentiferan worms / Geological Society, London, Special Publications, 87:295-302, doi:10.1144/GSL.SP.1995.087.01.22 --- P. R. Dando, J. A. Hughes, and F. Thiermann: Preliminary observations on biological communities at shallow hydrothermal vents in the Aegean Sea / Geological Society, London, Special Publications, 87:303-317, doi:10.1144/GSL.SP.1995.087.01.23 --- S. M. Sudarikov and S. V. Galkin: Geochemistry of the Snake Pit vent field and its implications for vent and non-vent fauna / Geological Society, London, Special Publications, 87:319-327, doi:10.1144/GSL.SP.1995.087.01.24 --- Gareth Rieley, Cindy L. van Dover, David B. Hedrick, David C. White, and Geoffrey Eglinton: Lipid characteristics of hydrothermal vent organisms from 9°N, East Pacific Rise / Geological Society, London, Special Publications, 87:329-342, doi:10.1144/GSL.SP.1995.087.01.25 --- D. R. Dixon, D. A. S. B. Jollivet, L. R. J. Dixon, J. A. Nott, and P. W. H. Holland: The molecular identification of early life-history stages of hydrothermal vent organisms / Geological Society, London, Special Publications, 87:343-350, doi:10.1144/GSL.SP.1995.087.01.26 --- Don A. Cowan: Hyperthermophilic enzymes: biochemistry and biotechnology / Geological Society, London, Special Publications, 87:351-363, doi:10.1144/GSL.SP.1995.087.01.27 --- Christopher R. German and Martin V. Angel: Hydrothermal fluxes of metals to the oceans: a comparison with anthropogenic discharge / Geological Society, London, Special Publications, 87:365-372, doi:10.1144/GSL.SP.1995.087.01.28 --- Kevin G. Speer and Karl R. Helfrich: Hydrothermal plumes: a review of flow and fluxes / Geological Society, London, Special Publications, 87:373-385, doi:10.1144/GSL.SP.1995.087.01.29 --- Mark D. Rudnicki: Particle formation, fallout and cycling within the buoyant and non-buoyant plume above the TAG vent field / Geological Society, London, Special Publications, 87:387-396, doi:10.1144/GSL.SP.1995.087.01.30

Anmerkung: TABLE OF CONTENTS Preface Chapter 1. The CO2-Carbonic Acid System and Solution Chemistry Basic Concepts Activity Coefficients in Solutions Influences of Temperature and Pressure The Carbonic Acid System in Seawater Calculation of the Saturation State of Seawater with Respect to Carbonate Minerals Concluding Remarks Chapter 2. Interactions Between Carbonate Minerals and Solutions Sedimentary Carbonate Minerals Basic Concepts Characteristics of Sedimentary Carbonate Minerals Solubility Behavior of Carbonate Minerals General Considerations Calcite and Aragonite Solubility Methods for the Calculation of Equilibrium Solution Composition Under Different Conditions Surface Chemistry of Carbonate Minerals Basic Principles Adsorption of Ions on Carbonate Surfaces Carbonate Dissolution and Precipitation Kinetics Basic Principles Reaction Kinetics in Simple Solutions Reaction Kinetics in Complex Solutions Concluding Remarks Chapter 3. Coprecipitation Reactions and Solid Solutions of Carbonate Minerals General Concepts Background Information Basic Chemical Considerations Coprecipitation of "Foreign" Ions in Carbonate Minerals Examples of Coprecipitation Reactions General Models for Partition Coefficients in Carbonates Magnesian Calcite General Considerations The Fundamental Problems Experimental Observations Hypothesis of a Hydrated Magnesian Calcite Stable Isotope Chemistry General Considerations Oxygen Isotopes Carbon Stable Isotopes Concluding Remarks Chapter 4. The Oceanic Carbonate System and Calcium Carbonate Accumulation in Deep Sea Sediments An Overview of Major Processes The CO2 System in Oceanic Waters The Upper Ocean The Deep Sea Saturation State of Deep Seawater with Respect to CaCO3 Sources and Sedimentation of Deep Sea Carbonates Sources Sedimentation The Distribution of CaCO3 in Deep Sea Sediments and Carbonate Lithofacies General Considerations The Distribution of CaCO3 in Surface Sediments Factors Controlling the Accumulation of Calcium Carbonate in Deep Sea Sediments General Relations Factors Leading to Variability Near Interfacial Processes Variability of Calcium Carbonate Deposition in Deep Sea Sediments with Time Influence of Glacial Times The Impact of Fossil Fuel CO2 on the Ocean-Carbonate System Concluding Remarks Chapter 5. Composition and Source of Shoal-Water Carbonate Sediments Introduction Shoal-Water Carbonates in Space and Time Carbonate Grains and Skeletal Parts Overview and Examples Sediment Classification Depositional Environments Concluding Statement Biomineralization General Aspects Environmental Controls on Mineralogy Stable Isotopes Coprecipitation Precipitation of Carbonates from Seawater Carbonate Chemistry of Shallow Seawater Abiotic Precipitation of CaCO3 from Seawater Sources of Aragonite Needle Muds Formation of Oöids Concluding Remarks 238 Chapter 6. Early Marine Diagenesis of Shoal-Water Carbonate Sediments Introduction Some Preliminary Thermodynamic and Kinetic Considerations Very Early Diagenesis Major Diagenetic Processes Pore Water Chemistry Precipitation of Early Carbonate Cements Dissolution of Carbonates Concluding Remarks Chapter 7. Early Non-Marine Diagenesis of Sedimentary Carbonates Introduction Plate-Tectonic Controls on Diagenesis General Considerations for Early Non-Marine Diagenesis Major Types of Non-Marine Environments Water Chemistry Reactivity of Sedimentary Carbonates Major Phase Transformations The Transformation of Aragonite to Calcite Dolomite Formation Summary Remarks Mass Transfer During Diagenesis General Considerations Geochemical Constraints on Mass Transfer Beachrock Formation Lithification in the Meteoric Environment Introduction The Meteoric Environment and Cement Precipitates Bermuda: A Case Study of a Meteoric Diagenetic Environment Introduction Geological Framework Limestone Chemistry and Isotopic Composition Water Chemistry Carbonate Mass Transfer A Brief Synthesis of Meteoric Diagenesis Diagenetic Stages Effect of Original Mineralogy Climatic Effects Rock-Water Relationships Mixed Meteoric-Marine Regime Concluding Remarks Chapter 8. Carbonates as Sedimentary Rocks in Subsurface Processes Introduction P,T, and X and Carbonate Mineral Stability Subsurface Water Chemistry in Sedimentary Basins Continuous Processes Pressure Solution Dolomitization Mud to Spar Neomorphism Secondary Porosity Cementation in the Subsurface Examples of "Models" of Long-Term Diagenesis The Present Ocean Setting The Present Continental Setting Concluding Remarks Chapter 9. The Current Carbon Cycle and Human Impact Introduction Modern Biogeochemical Cycle of Carbon A Model for the Cycle of Carbon Methane and Carbon Monoxide Fluxes CO2 Fluxes Human Impact on Carbon Fluxes The Fossil Fuel and Land Use Fluxes Observed Atmospheric CO2 Concentration Increase Future'Atmospheric CO2 Concentration Trends Consequences of Increased Atmospheric CO2 Levels The Oceanic System Sources of Calcium, Magnesium, and Carbon for Modern Oceans Mass Balance of Ca, Mg, and C in Present Oceans Oceanic Mass Balance of Elements Interactive with Ca, Mg, and C Concluding Remarks Chapter 10. Sedimentary Carbonates in the Evolution of Earth's Surface Environment Introduction Sedimentary Rock Mass-Age Distributions Secular Trends in Sedimentary Rock Properties Lithologic Types Chemistry and Mineralogy Carbon Cycling Modeling Introduction and Development of a Global Model Glacial-Interglacial Changes of Carbon Dioxide Long-Term Changes of Atmospheric CO2 Phanerozoic Cycling of Sedimentary Carbonates Synopsis of the Origin and Evolution of the Hydrosphere-Atmosphere-Sedimentary Lithosphere Origin of the Hydrosphere The Early Stages The Transitional Stage Modern Conditions Concluding Remarks Epilogue Introduction The Road Traveled The State of the Art Ever Onward References Index

Anmerkung: TABLE OF CONTENTS FOREWORD 1 INTRODUCTION AND SURVEY OF RADIOANALYSIS 1.1 Introduction 1.2 Principles of radioanalysis 1.2.1 General 1.2.2 Glossary of basic terms and concepts 1.3 Scope and contents References 2 SAMPLING AND PRECONCENTRATION 2.1 Survey and principles 2.1.1 Sampling 2.1.2 From sample to aliquot 2.1.2 .1 General 2.1.2.2 Granular material 2.1.2.3 Water 2.2 Sampling procedures 2.2.1 Rocks 2.2.2 Sediments and pore water 2.2.2.1 Sediments 2.2.2.2 Pore water 2.2.3 Fresh and ground water and related particulate matter 2.2.3.1 Fresh water 2.2.3.2 Ground water 2.2.4 Sea- and estuarine water and related particulate matter and sediments 2.2.4.1 Water 2.2.4.2 Particulate matter 2.2.4.3 Sediment cores 2.2.5 Rainwater and dry deposition 2.2.5.1 Rainwater 2.2.5.2 Dry deposition 2.3 Preconcentration 2.3.1 General 2.3.2 Fresh water and rainwater 2.3.3 Seawater 2.3.3.1 Survey 2.3.3.2 Scavenging procedures 2.3.3.3 Ion-exchange and solvent extraction procedures for Th, U and Pu 2.4 Reference materials 2.4.1 Principle 2.4.2 Survey of reference materials and SRM's 2.4.3 Use of reference materials and SRM's 2.4.3.1 Reference materials 2.4.3.2 SRM's 2.4.4 Reference materials for environmental radioactivity and isotopic ratio measurements References 3 INSTRUMENTAL RADIOANALYSIS OF GEOLOGICAL MATERIALS 3.1 Survey 3.1.1 Activation analysis 3.1.2 Photon activation analysis 3.1.3 Charged particle activation analysis (CPAA and HIAA) 3.1.4 Prompt techniques 3.1.4.1 Neutron induced prompt capture y-ray measurement (PGAA) 3.1.4.2 Proton induced X-ray emission (PIXE) 3.2 Principles 3.2.1 Principles of instrumental neutron activation analysis (INAA) 3.2.1.1 Activation 3.2.1.2 Standardization and flux monitoring 3.2.1.3 Count rate 3.2.1.4 Counting result 3.2.1.5 Sensitivity 3.2.1.6 Characteristic parameters of the three types of neutron activation 3.2.2 Delayed neutron counting 3.2.3 Activation analysis with high-energy photons 3.2.4 Principles of charged particle activation analysis (CPAA) 3.2.5 Principles of prompt techniques 3.2.5.1 Prompt capture gamma-ray measurements (PGAA) 3.2.5.2 Proton induced X-ray emission (PIXE) 3.3 Practical aspects of INAA, IPAA and PIXE 3.3.1 The radioanalytical laboratory 3.3.2 Irradiation facilities for NAA 3.3.2.1 Nuclear reactors 3.3.2.2 Rabbit systems 3.3.2.3 Epithermal activation 3.3.2.4 Neutron generators 3.3.2.5 Delayed neutron counting 3.3.3 Routing of INAA 3.3.4 Practical aspects of IPAA 3.3.5 Practical aspects of CPAA 3.3.6 Practical aspects of PGAA 3.3.7 Practical aspects of PIXE and PIGE 3.3.7.1 Proton induced X-ray emission (PIXE) 3.3.7.2 Proton induced prompt gamma emission (PIGE) 3.3.8 The error-budget 3.4 Multielement determination by INAA based on gamma-ray spectrometry 3.4.1 General 3.4.2 A practical procedure for INAA of silicates based on thermal neutrons 3.4.2.1 Preparation of sample and standards for irradiation 3.4.2.2 Irradiation and measurements 3.4.2.3 Conclusion 3.4.3 Rocks and ores 3.4.4 Meteorites 3.4.5 Sediments 3.4.6 Air-dust 3.4.7 Coal and ash 3.5 Instrumental neutron activation analysis of the lanthanides 3.6 Instrumental neutron activation analysis of uranium 3.7 Applications of instrumental neutron activation analysis with an isotopic neutron source and a 14.5 MeV neutron generator 3.7.1 Survey 3.7.2 INAA with isotopic neutron sources in the radiochemical laboratory 3.7.3 INAA with the neutron generator in the radiochemical laboratory 3.7.4. Conclusion 3.8 Applications of IPAA to silicates 3.9 Applications of IPAA to silicates 3.10 Applications of prompt techniques 3.10.1 Applications of PGAA and PIGE 3.10.2 Applications of PIXE References 4 NEUTRON ACTIVATION ANALYSIS INCLUDING CHEMICAL SEPARATION OF GEOLOGICAL SAMPLES 4.1 Introduction 4.2 Dissolution procedures and separation schemes 4.3 Lanthanides 4.3.1 General 4.3.2 Present procedures 4.4 Noble metals 4.4.1 General 4.4.2 Separation schemes 4.4.3 Single element determinations 4.5 Uranium and thorium 4.5.1 General 4.5.2 Procedures 4.5.2.1 Uranium 4.5.2.2 Thorium 4.6 Other elements 4.6.1 General 4.6.2 Alkali metals 4.6.3 Earth alkali metals 4.6.4 Copper and zinc 4.6.5 Mercury 4.6.6 Indium 4.6.7 Thallium 4.6.8 Tin 4.6.9 Elements with volatile halides and hydrides: Ga, Ge, As, Se, Sb, Te 4.6.9.1 Survey 4.6.9.2 Procedures 4.6.10 Vanadium and tantalum 4.6.11 Chromium 4.6.12 Molybdenum andtungsten 4.6.13 Halogens References 5 RADIOANALYSIS OF WATER 5.1 Survey 5.2 Elemental analysis of fresh water 5.2.1 Survey 5.2.2 Routine elemental analysis of rainwater 5.2.2.1 Sampling and sample treatment 5.2.2.2 Irradiation and processing of aliquots 5.2.2.3 Results 5.2.3 Special elemental analysis of rainwater 5.2.3.1 Bromine and iodine by isotopic exchange 5.2.3.2 Iodate by anion-exchange 5,2.3.3 Silver by cation-exchange and subsequent INAA 5.2.4 Routine elemental analysis of surface and ground water 5.2.4,1 General 5.2.4.2 Routine procedures 5.3 Elemental analysis of seawater 5.3.1 Survey 5.3.2 Routine elemental analysis of seawater by preconcentration on a "Chelex"-column and INAA 5.3.3 Routine elemental analysis of seawater by preconcentration on active carbon 5.3.3,1 General 5.3.3.2 Arsenic and antimony 5,3.3.3 Vanadium, iodine, tellurium and uranium 5.3.3.4 Total antimony, molybdenum and tungsten 5,3.3.5 Chromate, cobalt, nickel and tetravalent selenium 5.3.3,6 Mercury 5.3.4 Special elemental analysis of seawater 5.3.4.1 General 5.3.4.2 Rubidium and cesium 5.3.4.3 Strontium 5.3.4.4 Manganese and zinc 5,3,4.5 Tin 5.3.4.6 Nickel 5.3.4.7 Noble metals 5.3.4.8 Mercury References 6 RADIOTRACER EXPERIMENTS IN THE LABORATORY 6.1 Survey 6.2 Basic equations of radiotracer experiments in closed systems 6.3 Isotopic exchange in solution 6.4 Isotopic exchange between a solution and a solid 6.5 Reactions in solution 6.6 Reaction between a solution and a solid 6.6.1 Dissolution 6.6. 2 Leaching 6.6.3 Diffusion from solids 6.6.4 Sorption 6.7 Migration studies in solid-liquid systems 6.7.1 General 6.7.2 The determina tion of distribution coefficients in seawater 6.7.3 Radioecological column experiments in the laboratory 6.7.4 Laboratory experiments on very slow migration; the case of the actinides References 7 RADIOTRACER EXPERIMENTS IN THE FIELD 7.1 Survey 7.2 Principles of (radio)tracer experiments in open systems with flow in one direction 7.2.1 Basic concepts 7.2.2 Measurement of linear velocity and flow rate 7.2.3 Measurement of axial dispersion 7.2.4 Measurement of sedimentation rates 7.2.4.1 General 7.2.4.2 Lead-210 7.2.4.3 Cesium-137 7.2.5 Measurement of the degree of sediment mixing 7.2.6 Measurement of filtration velocity in case of horizontal groundwater flow 7.2.7 Measurement of groundwater flow in the unsaturated zone by radiocarbon 7.3 Principles of (radio)tracer experiments in open systems with flow in various directions 7.3.1 Survey 7.3.2 Measurement of sand or silt flow rates on the sea floor 7.3.3 Radiotracer measurements in water movement in the saturated zone 7.3.4 Radiotracer measurement on water movement in the unsaturated zone 7.4 Practical aspects of radiotracer experiments in the field 7.4.1 Preparation 7.4.2 Performance 7.4.3 Calculations References 8 MEASUREMENT OF NATURAL RADIOACTIVITY 8.1 General 8.1.1 Survey 8.1.2 Concentrations 8.1.3 Detection by direct measurement ofradiation 8.1.3.1 In situ measurements of uranium and thorium 8.1.3.2 Laboratory measurements 8.1.4 Detection by secundary effects 8.2 Measurement of low-level gamma-activities 8.2.1 General 8.2.2 A low background system (LBS) 8.2.2.1 Set-up 8.2.2.2 Limits of detection and determination 8.2.2.3 Processing of data 8.2.3. Anti-coincidence (AC)-counting 8.3 Measurements in rocks and sediments 8.3.1 General 8.3.2 Radon measurements (emanometry) 8.3.3 Age dating by measurement of disequilibrium in the natural decay-series 8.3.3.1 General 8.3.3.2 234U-230Th 8.3.3.3 235U-231Pa 8.3.3.4 232Th-230Th 8.3.3.5 230Th-231Pa 8.3.4 Environmental laboratory measurements on naturally occurring radionucl