Hydrothermal processes and products on the Galapagos Rift and East Pacific Rise
Rachel M. Haymon, 1989. "Hydrothermal processes and products on the Galapagos Rift and East Pacific Rise", The Eastern Pacific Ocean and Hawaii, E. L. Winterer, Donald M. Hussong, Robert W. Decker
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An explosion of research during the past decade has been dedicated to discovering, describing, and understanding the extent and importance of submarine hydrothermal processes, and much of the important field work on this topic has been carried out on and near eastern Pacific spreading centers. This chapter reviews the empirical data (field observations, measurements, and sample analyses) and some of the prevailing interpretations and hypotheses acquired from 15 years of study of hydrothermal processes along and adjacent to the Galapagos Rift and East Pacific Rise (EPR) spreading center systems. Hydrothermal processes elsewhere in the eastern Pacific, i.e., in the Gulf of California and along the Gorda-Juan de Fuca-Explorer Ridge spreading centers in the northeast Pacific, are discussed in separate chapters by Lonsdale and by Johnson and Holmes (this volume).
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This new synthesis includes a section on plate kinematics, documenting the basis for a new interpretation of the magnetic anomaly patterns. It also includes: six chapters on various aspects of tectonics, petrologic characteristics, and hydrothermal processes of active ridges from the Galapagos Rift to the Juan de Fuca Ridge; a section on mid-plate volcanism, including the Hawaii-Emperor chain; five chapters on various aspects of northeastern Pacific sedimentary regimes; and nine chapters on the geology of the Pacific continental margin from the Aleutians to Guatemala, seen from the perspective of marine geology. Three separate oversize plates illustrate the bathymetry of the northeast Pacific; two more on the same base show distribution of sediment samples and types and magnetic anomaly data and tectonic interpretations; and others include a synthesis of the geology and bathymetry of the Hawaiian Islands, details of bathymetry along parts of the East Pacific Rise, and a major seismic profile across the Pacific margin of Guatemala.