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The database GEOROC is maintained by the Max Planck Institute for Chemistry in Mainz, Germany. The database is a comprehensive collection of published analyses of igneous rocks. It contains major and trace element concentrations, radiogenic and stable isotope ratios as well as analytical ages for whole rocks, glasses, minerals and inclusions. Samples come from 11 different geological settings. Metadata include, among others, geographic location with latitude and longitude, rock class and rock type, alteration grade, analytical method, laboratory, reference materials and references. Currently, GEOROC contains almost 1,500,000 analyses of 525,000 samples published in about 17,000 papers.
GeoReM is a Max Planck database for reference materials of geological and environmental interest, such as rock powders, synthetic and natural glasses as well as mineral, isotopic, biological, river water and seawater reference materials. It contains published analytical data and compilation values (major and trace element concentrations and mass fractions, radiogenic and stable isotope ratios). GeoReM contains all important metadata about the analytical values such as uncertainty, analytical method and laboratory. Sample information and references are also included. It contains ca. 48,310 analyses of 3,450 reference materials from about 10,550 papers, and preferred analytical values.