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Harnisch & Eisenhauer 1998

Harnisch, J. and Eisenhauer, A. (1998). Natural CF₄ and SF₆ on Earth. Geophysical Research Letters 25: doi: 10.1029/98GL01779. issn: 0094-8276.

The occurrence of CF4 and SF6 in natural fluorites (CaF2) is reported. Contents are found to be typically 200--2000 ppt-mass for CF4 and 50--100 ppt-mass for SF6. CF4 and SF6 were also detected in granites where fluorite is an accessory mineral. CF4 and SF6 thus possess a large reservoir in the continental crust that by degassing can sustain natural atmospheric background levels of 40 ppt-mole and up to 0.01 ppt-mole, respectively. The article also discusses how natural SF6 may cause interference in hydrological tracer studies. ¿ 1998 American Geophysical Union

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	Abstract

Keywords
Atmospheric Composition and Structure, Evolution of the atmosphere, Atmospheric Composition and Structure, Geochemical cycles, Hydrology, General or miscellaneous, Mineral Physics

Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/

Publisher
American Geophysical Union
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