geochemistry

geochemical /jee'oh kem"i keuhl/, adj.geochemically, adv.geochemist, n.
/jee'oh kem"euh stree/, n.
the science dealing with the chemical changes in and the composition of the earth's crust.
[1900-05; GEO- + CHEMISTRY]

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Scientific discipline dealing with the relative abundance, distribution, and migration of the Earth's chemical elements and their isotopes.

Historically, geochemistry was concerned primarily with defining elemental abundances in minerals and rocks. Modern geochemical research also includes study of the continual recycling of the Earth's constituent materials through geologic processes, the cyclic flow of individual elements (and their compounds) between living and nonliving systems, and certain areas of cosmology.

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      scientific discipline that deals with the relative abundance, distribution, and migration of the Earth's chemical elements and their isotopes.

      A brief treatment of geochemistry follows. For full treatment, see geology: Geochemistry. (geology)

      Until the early 1940s geochemistry was primarily concerned with defining elemental abundances in minerals and rocks. Since that time, investigators have broadened the scope of their research significantly, studying, for example, the continual recycling of the Earth's constituent materials through agencies of the hydrosphere and atmosphere coupled with seafloor spreading, mountain building, and other processes involving the terrestrial crust. Modern geochemical research also includes the study of chemical transformations of biological materials in rocks and the cyclic flow of individual elements (and their compounds) between living and nonliving systems. Since the 1960s, certain areas of geochemical research have become interlinked with cosmology—e.g., the study of the origin and relative abundance of elements in the solar system, the Milky Way Galaxy, and the universe as a whole; the chemical composition of meteorites; and the ages of terrestrial and lunar rocks.

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Universalium. 2010.

Look at other dictionaries:

  • geochemistry — ge o*chem is*try (j[=e] [ o]*k[e^]m [i^]s*tr[y^]), n. [Gr. ge a, gh^, the earth + chemistry.] The study of the chemical composition of, and of actual or possible chemical changes in, the crust of the earth. {Ge o*chem ic*al}, a. {Ge o*chem ist},… …   The Collaborative International Dictionary of English

  • geochemistry — [jē΄ōkem′is trē] n. the branch of chemistry dealing with the chemical composition of the earth s crust and the chemical changes that occur there geochemical adj. geochemist n …   English World dictionary

  • Geochemistry — The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, and the cycles of matter and energy that transport the Earth s… …   Wikipedia

  • geochemistry — ge•o•chem•is•try [[t]ˌdʒi oʊˈkɛm ə stri[/t]] n. 1) chem. gel the science dealing with the chemical changes in and the composition of the earth or other celestial bodies 2) the geological and chemical characteristics or features of any area: the… …   From formal English to slang

  • geochemistry — geochemija statusas T sritis chemija apibrėžtis Mokslas, tiriantis visos Žemės ir geosferų cheminę sudėtį, cheminių elementų pasiskirstymą bei migraciją geosferose. atitikmenys: angl. geochemistry rus. геохимия …   Chemijos terminų aiškinamasis žodynas

  • geochemistry — geochemija statusas T sritis ekologija ir aplinkotyra apibrėžtis Mokslas, tiriantis Žemės ir geosferų cheminę sudėtį, cheminių elementų kilmę, egzistavimo formas, sklaidą, kaupimąsi, pasiskirstymą, poveikį geologiniams procesams, migraciją… …   Ekologijos terminų aiškinamasis žodynas

  • geochemistry — noun Date: 1902 1. a science that deals with the chemical composition of and chemical changes in the solid matter of the earth or a celestial body (as the moon) 2. the related chemical and geological properties of a substance • geochemical… …   New Collegiate Dictionary

  • geochemistry — noun The branch of chemistry that deals with the chemical composition of the Earth and other planets, and with the chemical processes that occur in the formation of rocks and minerals etc …   Wiktionary

  • geochemistry — geo·chem·is·try (je″o kemґis tre) [geo + chemistry] the science concerned with study of the elements in the earth s crust and the chemical changes that occur therein …   Medical dictionary

  • geochemistry —    The science of the qualitative and quantitative identification of the elements and their distribution in the earth [16] …   Lexicon of Cave and Karst Terminology

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