Oxygen isotopic fractionation between oxygen of different sites in hydroxyl-bearing silicate minerals

Details Oxygen isotopic fractionation between oxygen of different sites in hydroxyl-bearing silicate minerals Oxygen isotopic fractionation between oxygen of different sites in hydroxyl-bearing silicate minerals

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..173h&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, Issue 2, pp.173-182

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Scientific paper

A method has been developed for extraction of hydroxyl oxygen from hydroxyl-bearing silicate minerals for oxygen isotopic analysis. The O 18 of oxygen of the OH groups is significantly different from that in the rest of the mineral structure. The isotopic fractionation between the two types of sites has the potential to be a sensitive geothermometer. Several O 18 values were obtained for oxygen of the OH attached to different silicate structures as well as for two muscovite samples with quantitatively estimated different temperatures of formation. The 1000 ln (mineral-OH) values ranged from 5.2%. for muscovite to about 12.6%. for kaolinite and chlorite.

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