Geothermal Fluids .- Chemistry and Techniques, by K. Nicholson. Springer-Verlag, Berlin, 1993, 263 pp., 30 figs. This book, as the author notes, grew out of several years of lectures and observations that were made while teaching a mixture of international students at the Geothermal Institute, University of Auckland and while the author was conducting some of his own research in New Zealand. The book is subdivided into two major parts called “Geothermal Fluid Chemistry’ ’ and “Exploration Techniques & Surveys”. The first part includes information on the basics of geothermal systems, water, gas, and isotope geochemistry whereas the second part discusses exploration techniques, water surveys, gas surveys, and soil surveys. Becau;se many of the students to whom these topics are addressed originated in third-world countries with many outstanding, productive geothermal systems, the topics are described at an upper division to beginning graduate level and the techniques include many basic, cost-effective methods to achieve success in remote locations with primitive
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infrastructures. Many of the discussions are “cookbook” in style. A reader with no previous experience in geothermal work could use this book to prepare for geochemical sampling in very primitive locations. The author apparently has much experience in the analytical chemistry of solutions because, generally, two (or more) analytical methods for critical analytes are listed in part two. Some methods are many years out-of-date but are simple and “tried and true”. The list of interpretive methods described in part one is also “tried and true”. Other sections are less detailed than the sub-section on wet chemistry. This is not an advanced book for specialists. Instead, this book is of primary interest to budding geothermal explorationists who will use geochemistry for practical goals and to those who need a compact source of information on basic methods used in geochemical exploration. Probably most of us who do exploration for geothermal resources would appreciate having a copy of this book. It is certainly well organized and easy to understand. FRASER GOFF (Los Alamos, N.M.)