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Geosciences LibreTexts


Geochemistry is the study of the composition and chemical changes that take place on the Earth and within its major divisions: the lithosphereatmospherehydrosphere, and biosphere. Environmental chemistry focuses more specifically on the transport of substances within and between these geospheres and their subdivisions, with special emphasis on the effects brought about by the activities of humans. The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System and has made important contributions to the understanding of a number of processes including mantle convection, the formation of planets and the origins of granite and basalt.