B.M. Gunn

This site from Dr. Bernie Gunn offers a brief description of volcanic and igneous centers world-wide (and some associated sediments) for which there is reasonable data. The site features regional variation diagrams as well as multi-element fingerprint analyses and data for rare earth elements, metals, and alkaline earth trace elements. The site also includes fractionation diagrams, comparisons between the different types of basalts and other fundamental magma types, graphic comparisons between centers of similar and dissimilar type, and the primary basaltic parental magma trends. The data is continuously updated. In addition, surveys are given of the more important elements, their fractionation paths, their distributions in major rock types, locales where the greatest abundances are likely to be found, and their ratios to related or similar elements.

Subject: Geoscience:Geology:Mineralogy:Phase Equilibria/Thermodynamics, Geoscience:Geology:Igneous and Metamorphic Petrology:PTt Relationships, Thermodynamics and Phase Equilibria, Igneous Associations and Tectonic Settings, Geoscience:Geology:Geochemistry:Elements, Phase Equilibria/Thermodynamics, Geoscience:Geology:Tectonics, Geochemistry:Geochemical Analysis, Reaction Kinetics/Rates
Resource Type: Scientific Resources:Overview/Reference Work, Datasets and Tools:Datasets
Data Source: Observational Data
Science Background Required: Advanced geoscience background required
Topics: Solid Earth:Mineralogy:Phase Equilibria/Thermodynamics, Solid Earth:Petrology:PTt Relationships, Thermodynamics and Phase Equilibria, Solid Earth:Geochemistry:Elements, Reaction Kinetics/Rates, Geochemical Analysis, Solid Earth:Petrology:Igneous Associations and Tectonic Settings, Solid Earth:Geochemistry:Phase Equilibria/ThermodynamicsKeywords: REE, MORB, mid ocean ridge basalt, NMORB, EMORB, OIB, OIB, CAB