The Petrological Database of the Ocean Floor (PetDB) is a relational database for global geochemical data on igneous and metamorphic rocks generated at mid-ocean ridges including back-arc basins, young seamounts, and old oceanic crust, as well as ophiolites and terrestrial xenoliths from the mantle and lower crust and diamond geochemistry. These data are obtained by analyses of whole rock powders, volcanic glasses, and minerals by a wide range of techniques including mass spectrometry, atomic emission spectrometry, x-ray fluorescence spectrometry, and wet chemical analyses. Data are compiled from the scientific literature by PetDB data managers, and entered after methodical metadata review.
The Global Petrological Database of Oceanic Crust (GPDOC) is a relational database containing geochemical information on igneous and metamorphic rocks from mid-ocean ridges, back-arc basins, seamounts, and old oceanic crust, as well as ophiolites and terrestrial samples from the mantle and lower crust. This data is compiled from scientific literature through a rigorous metadata review process.