Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
EN  |  EL

Αναζήτηση

Πλοήγηση

Ο Χώρος μου

White mica domain formation: A model for paragonite, margarite, and muscovite formation during prograde metamorphism

Christidis Georgios, Kenneth J. T. Livi , Péter Árkai , David R Veblen

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/5AE54AF3-4930-460D-BBB0-BD992A0FDE6E
Έτος 2008
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά J. T. Kenneth Livi ,G.E. Christidis ,Péter Árkai ,D. R Veblen , " White mica domain formation: A model for paragonite, margarite, and muscovite formation during prograde metamorphism ",Am. Mineral. ,vol. 93,no.4 pp.520-527 ,2008.doi :10.2138/am.2008.2662 https://doi.org/10.2138/am.2008.2662
Εμφανίζεται στις Συλλογές

Περίληψη

Scanning transmission electron microscopy images of the 00l white mica planes in crystals fromcentral Switzerland and Crete, Greece, reveal that domains of paragonite, margarite, and muscoviteare ordered within the basal plane. Energy dispersive X-ray analyses show that both cations in theinterlayer and in the 2:1 layer have ordered on the scale of tens to hundreds of nanometers. Domainboundaries can be both sharp and crystallographically controlled or diffuse and irregular. A modeloutlining the domain formation process is presented that is consistent with X-ray powder diffractionand transmission electron microscopy data. The domain model incorporates aspects of a mixedlayeredand a disordered compositionally intermediate phase models. The main feature of the modelis the formation of mica species that segregate within the basal plane and contradict the notion ofhomogeneous layers within mixed-layer phases. Implications for the formation of all diagenetic andvery low-grade metamorphic 2:1 sheet silicates are discussed

Διαθέσιμα αρχεία

Υπηρεσίες

Στατιστικά