Mathematics – Logic
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993e%26psl.120..247z&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 120, no. 3-4, p. 247-263
Mathematics
Logic
73
Fractionation, Hydroxyl Radicals, Metamorphism (Geology), Oxygen Isotopes, Silicates, Mineralogy, Petrology, Quartz, Rocks, Temperature Effects
Scientific paper
The modified increment method has been applied to the calculation of oxygen isotope fractionation factors for hydroxl-bearing silicate minerals. The order of O-18 enrichment obtained in common rock-forming minerals is: pyrophyllite greater than kaolinite greater than tourmaline greater than or equal to tacl greater than prehnite greater than or equal to topaz greater than illite greater than phengite greater than lepidolite greater than or equal to muscovite greater than or equal to staurolite greater than epidote greater than glaucophane greater than serpentine greater than or equal to chlorite greater than tremolite greater than hornblende greater than phlogopite greater than or equal to biotite greater than humite greater than norbergite greater than ilvaite. Hydroxyl-bearing silicates are enriched in O-18 relative to hydroxyl groups but depleted in O-18 relative to anhydrous counterparts. Three sets of self-consisted fractionation factors: between quartz and the hydroxyl-bearing silicate minerals, between calcite and the silicate minerals, and between the silicate minerals and water, have been calculated for a temperature range of 0-1200 C. The fractionation factors calculated for mineral pairs are applicable to isotopic geothermometry in igneous, metamorphic and sedimentary petrology. They can be used as a test of isotopic equilibrium of disequilibrium in natural mineral assemblages over all temperature ranges of geological interest. The difference in oxygen isotope composition between the hydroxyl-bearing mineral and the OH group is quantitatively demonstrated to be temperature dependent and, therefore, can be used as a single-mineral geothermometer.
No associations
LandOfFree
Calculation of oxygen isotope fractionation in hydroxyl-bearing silicates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Calculation of oxygen isotope fractionation in hydroxyl-bearing silicates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calculation of oxygen isotope fractionation in hydroxyl-bearing silicates will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-786116