Editing Geochemistry (section)

==Subfields==
Some subfields of geochemistry are:<ref>{{cite web|title=Welcome to GPS Geochemistry|url=http://web.gps.caltech.edu/options/geochemistry/|website=GPS Research Program|publisher=California Institute of Technology|access-date=2 October 2017|archive-date=21 September 2017|archive-url=https://web.archive.org/web/20170921225209/http://web.gps.caltech.edu/options/geochemistry/|url-status=dead}}</ref>
*[[Aqueous geochemistry]] studies the role of various elements in watersheds, including [[copper]], [[sulfur]], [[Mercury (element)|mercury]], and how elemental fluxes are exchanged through atmospheric-terrestrial-aquatic interactions.<ref>{{cite book|last1=Langmuir|first1=Donald|title=Aqueous environmental geochemistry|date=1997|publisher=Prentice Hall|location=Upper Saddle River, N.J.|isbn=9780023674129}}</ref>
*[[Biogeochemistry]] is the field of study focusing on the effect of life on the chemistry of the Earth.<ref>{{cite book|last1=Schlesinger|first1=William H.|last2=Bernhardt|first2=Emily S.|title=Biogeochemistry : an analysis of global change|date=2013|publisher=Academic Press|isbn=9780123858740|edition=Third}}</ref>{{rp|3}}
*[[Cosmochemistry]] includes the analysis of the distribution of elements and their isotopes in the [[universe|cosmos]].<ref name=cosmo>{{cite book|last1=McSween|first1=Harry Y. Jr.|last2=Huss|first2=Gary R.|title=Cosmochemistry|date=2010|publisher=Cambridge University Press|isbn=9781139489461}}</ref>{{rp|1}}
*[[Isotope geochemistry]] involves the determination of the relative and absolute concentrations of the [[chemical element|element]]s and their [[isotope]]s in the Earth and on Earth's surface.<ref>{{cite book|last1=Kendall|first1=Carol|author-link1=Carol Kendall (scientist)|last2=Caldwell|first2=Eric A.|chapter=Chapter 2: Fundamentals of Isotope Geochemistry|title=Isotope Tracers in Catchment Hydrology|editor-last1=Kendall|editor-first1=C.|editor-link1=Carol Kendall (scientist)|editor-last2=McDonnell|editor-first2=J. J.|date=1998|publisher=Elsevier Science|location=Amsterdam|pages=51–86|chapter-url=https://wwwrcamnl.wr.usgs.gov/isoig/isopubs/itchch2.html|access-date=3 October 2017|archive-date=3 May 2019|archive-url=https://web.archive.org/web/20190503212721/https://wwwrcamnl.wr.usgs.gov/isoig/isopubs/itchch2.html|url-status=live}}</ref>
*[[Organic geochemistry]], the study of the role of processes and compounds that are derived from living or once-living organisms.<ref>{{cite book|last1=Killops|first1=Stephen D.|last2=Killops|first2=Vanessa J.|title=Introduction to Organic Geochemistry|date=2013|publisher=John Wiley & Sons|isbn=9781118697207}}</ref>
*[[Photogeochemistry]] is the study of light-induced chemical reactions that occur or may occur among natural components of the Earth's surface.<ref>{{cite journal | pmc = 5307419 | pmid=28246525 | doi=10.1186/s12932-017-0039-y | volume=18 | title=A survey of photogeochemistry | journal=Geochem Trans | page=1 | last1 = Doane | first1 = TA| year=2017 | issue=1 | bibcode=2017GeoTr..18....1D | doi-access=free }}</ref>
*[[Regional geochemistry]] includes applications to environmental, hydrological and mineral exploration studies.<ref>{{cite journal|last1=Garrett|first1=R.G.|last2=Reimann|first2=C.|last3=Smith|first3=D.B.|last4=Xie|first4=X.|title=From geochemical prospecting to international geochemical mapping: a historical overview: Table 1|journal=Geochemistry: Exploration, Environment, Analysis|date=November 2008|volume=8|issue=3–4|pages=205–217|doi=10.1144/1467-7873/08-174|s2cid=130836294}}</ref>