The deuterium content of water in some volcanic glasses

Details The deuterium content of water in some volcanic glasses The deuterium content of water in some volcanic glasses

Dec 1958

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1958gecoa..15..218f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 15, Issue 3, pp.218-220

Computer Science

23

Scientific paper

The deuterium-hydrogen composition (relative to Lake Michigan WATER = 0.0) of water extractsd from coexisting perlite and obsidian from eleven different localities was determined. The water content of the obsidians is generally from 0.09 to 0.29 per cent by weight, though two samples from near Olancha, California, contain about 0.92 per cent. The relative deuterium concentration is from -4.6 to -12.3 per cent. The coexisting perlite contains from 2.0 to 3.8 per cent of water with a relative deuterium concentration of -3.1 to -16.6 per cent. The deuterium concentration in the perlites is not related to that in the enclosed obsidian. The deuterium concentration in the perlite water is related to the deuterium concentration of the modern meteoric water and the perlite water contains approximately 4 per cent less deuterium than does the groundwater of the area in which the perlites occur. The above relations hold true for perlites from northern New Mexico, east slope of the Sierra Nevada. California Coast Range, Yellowstone Park, Wyoming, and New Zealand. As the water in the obsidian is unrelated to meteoric water, but the enclosing perlite water is related, we believe that this is evidence for the secondary hydration of obsidian to form high water content perlitic glass.

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