Developments in Geochemistry, Volume 3: Helium Isotopes in Nature presents the isotopic investigations of noble gases. This book describes the origin, the history, and the contemporary distribution of isotopes of helium. Organized into 11 chapters, this volume begins with an overview of mass-spectrometric methods and measurements of the helium isotope abundance. This text then discusses the methods of collecting various terrestrial samples as well as the apparatus for helium extraction, volumetric measurements, and purification. Other chapters consider the isotope composition of primordial, radiogenic, and spallogenic light noble gases. This book discusses as well the origin and distribution of helium isotopes in meteorites, in the Earth's mantle, the crust and ocean, and in the atmosphere. The final chapter deals with the scientific and applied problems that can be resolved to the progress in helium isotope geochemistry. This book is a valuable resource for scientists. Research workers and students interested in the geochemistry of helium will also find this book useful.

Table of Contents


Part I

Chapter 1 - Collection and Preparation of Natural Helium

1.1. Vessels for Collecting and Long Storage of Natural Helium Samples

1.2. Collecting of Gaseous and Fluid Samples

1.3. Helium Extraction from Fluid Microinclusions in Minerals

1.4. Helium Extraction from Solids

1.5. Purification of Helium from Accompanying Gases

1.6. A Modern All-Metal System for Extraction and Purification of Helium

Chapter 2 - Measurements of Helium Contents in Sample; Helium Standards with a Given Isotopes Ratio

2.1. Measurement of Helium Contents in Terrestrial Gases

2.2. Preparation of Standard Mixtures of 3He and 4He

2.3. Helium Isotope Composition in the Lower Atmosphere

2.4. Universal Mass-Spectrometer Leak-In System for Helium Isotope Studies

Chapter 3 - Peculiar Features of Mass-Spectrometric Isotopes Analysis of Terrestrial Helium

3.1. Resolution of a Mass Spectrometer

3.2. Background of 4He Scattered Ions and Its Suppression in the Measurements of Very Low 3He/4He Ratios

3.3. Background of Scattered HD+ and H+3 Ions

3.4. "Memory" and Other Factors Affecting the Measurements of 3He and 4He Abundance in Terrestrial Samples

3.5. Two-Beam Mode of Operation and Static Mode of Pumping a Mass Spectrometer

3.6. Requirements for a Mass Spectrometer Used for Natural Helium Isotope Measurements

Chapter 4 - Isotopic Analysis of Natural Helium by a Static Magnetic Mass Spectrometer

4.1. One-Stage Magnetic Static Mass Spectrometer

4.2. Multi-Stage Static Mass Spectrometers

4.3. Results Obtained by Means of Magnetic Static Mass Spectrometers



© 1984
Elsevier Science
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@qu:In this handsomely bound book, one finds many important conclusions on oceanography, tectonics, geothermometry, mantle evolution and other subjects derived from the observations of He isotopic composition. I believe that the book is useful not only to noble gas geochemists, but also to other earth scientists, especially those working in geothermometry, tectonophysics, and petrology who may find many useful applications of the He isotopic data presented in this book in their own research. @source: Geochimica et Cosmochimica Acta