Hydrothermal Processes: The Development of Geochemical Concepts in the Latter Half of the Twentieth Century

Each issue of Geochemical Perspectives presents a single article with an in-depth view on the past, present and future of a field of geochemistry, seen through the eyes of highly respected members of our community.The articles combine research and history of the field's development and the scientist's opinions about future directions.We welcome personal glimpses into the author's scientific life, how ideas were generated and pitfalls along the way.Perspectives articles are intended to appeal to the entire geochemical community, not only to experts.They are not reviews or monographs; they go beyond the current state of the art, providing opinions about future directions and impact in the field.