Prossima pubblicazione.
Referenza:
▪ Skogby, H., Janák, M., Broska, I. (2916): Water incorporation in omphacite: concentrations and compositional relations in ultrahigh-pressure eclogites from Pohorje, Eastern Alps. European Journal of Mineralogy, 28, (in press).
Abstract:
Omphacite in ultra-high pressure (UHP) eclogites from the Pohorje Mountains in Slovenia, south-eastern Alps, has been investigated by electron microprobe (EMP), Infra-Red (IR) and Mössbauer spectroscopy to determine OH concentrations and related incorporation mechanisms. Results from polarized IR measurements reveal high contents of structurally-bound OH, varying from 530 to 870 ppm H2O. Characterization of omphacite composition by EMP analysis and Mössbauer spectroscopy shows that all samples contain vacancies at the M2 position, which can be expressed as a Ca-Eskola component (Ca0.5□0.5AlSi2O6). The amount of the Ca-Eskola component displays a positive correlation with the OH concentration, which confirms results from previous studies. The occurrence of precipitated quartz rods in some samples indicates that primary omphacite contained a larger Ca-Eskola component. Extrapolation of the observed trend-line for the Ca-Eskola and OH contents point to an original OH concentration around 1500 ppm H2O for these samples. The high water contents observed in omphacite are considered to be linked to the UHP origin of the eclogite rocks.
Water incorporation in omphacite: concentrations and compositional relations in UHP eclogites from Pohorje
- Marco E. Ciriotti
- Messaggi: 31645
- Iscritto il: ven 25 giu, 2004 11:31
- Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
- Contatta:
Water incorporation in omphacite: concentrations and compositional relations in UHP eclogites from Pohorje
Marco E. Ciriotti
«Things are interesting only in so far as they relate themselves to other things»
«Things are interesting only in so far as they relate themselves to other things»
- Marco E. Ciriotti
- Messaggi: 31645
- Iscritto il: ven 25 giu, 2004 11:31
- Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
- Contatta:
Re: Water incorporation in omphacite: concentrations and compositional relations in UHP eclogites from Pohorje
Pubblicato.
Referenza:
▪ Skogby, H., Janák, M., Broska, I. (2916): Water incorporation in omphacite: concentrations and compositional relations in ultrahigh-pressure eclogites from Pohorje, Eastern Alps. European Journal of Mineralogy, 28, 631-639.
Referenza:
▪ Skogby, H., Janák, M., Broska, I. (2916): Water incorporation in omphacite: concentrations and compositional relations in ultrahigh-pressure eclogites from Pohorje, Eastern Alps. European Journal of Mineralogy, 28, 631-639.
Marco E. Ciriotti
«Things are interesting only in so far as they relate themselves to other things»
«Things are interesting only in so far as they relate themselves to other things»
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