ΠΕΤΡΟΓΕΝΕΣΙΣ ΤΩΝ ΜΕΤΑΜΟΡΦΩΜΕΝΩΝ ΠΕΤΡΩΜΑΤΩΝ ΤΗΣ ΝΗΣΟΥ ΛΕΡΟΥ

ON THE BASIS OF STRATIGRAPHIC AND LITHOLOGICAL CRITERIA AND OF THE DIFFERENCESIN METAMORPHIC GRADE, FOUR METAMORPHIC FORMATIONS HAVE BEEN RECOGNIZED. ANALYSES OF MINERALS GIVE EVIDENCE FOR PROOPRESSIVE CHEMICAL COMPOSITIONAL CHANGES WITH INCREASING METAMORPHIC GRADE. STUDY OF THE PARTITIONING OF ELEMENTS AMONGCOEXISTING PHASES SUGGESTS THAT A CLOSE APPROACH TO CHEMICAL EQUILIBRIUM HASBEEN ACHIEVED DURING METAMORPHISM. CHEMICAL ANALYSES OF REPRESENTATIVE SAMPLES FORMED THE BASIS FOR THE EXAMINATION OF THE EFFECTS OF THE ROM COMPOSITIONON THE COMPOSITION AND DEVELOPMENT OF CERTAIN MINERALS. ON THE BASIS OF SYSTEMATIC VARIATION AND THE APPEARANCE OR DISAPPEARANCE OF SOME METAMORPHIC MINERALS THE METAMORPHIC TERRAIN OF LEROS MAY BE DIVIDED INTO CHLORITE, BIOTITES, GARNET AND STAURDITE- KYANITE ZONES OF PROGRESSIVE REGIONAL METAMORPHISM. ATTEMPTS HAVE BEEN MADE TO ESTIMATE THE PHYSICAL CONDITIONS OF METAMORPHISM COMBINING THE MINERAL ASSEMBLAGES WITH AVAILABLE EXPERIMENTAL OR CALCULATED PHASE EQUILIBRIA. THE DEVELOPMENT OF THE FACIES SERIES IN LEROS SEEM TO PROVIDE A TYPICAL EXAMPLE OF MIYASHIROS INTERMEDIATE HIGH P/T TYPE FACIES SERIES. FINALLY, A COMPARISON IS MADE BETWEEN THE METAMORPHISM AS DEVELOPED IN LEROS WITH THAT IN AREAS BELONGING TO THE ATTICOCYCLADIC MASSIF AND THE RELATION OF METAMORPHISM TO POSSIBLE SUBDUCTION ZONES IS DISCUSSED.

Grantor dc:publisher

Institutes outside Greece

Year dc:date

1975

Authors dc:creator

• Katagas, Christos
• Καταγάς, Χρήστος

• Γεωλογία
• Γεωχημεία
• ΜΕΤΑΜΟΡΦΙΚΕΣ ΖΩΝΕΣ
• Μεταμορφωμένα πετρώματα
• ΝΗΣΟΣ ΛΕΡΟΣ
• Ορυκτολογία
• Πετρογένεση
• ΠΕΤΡΟΛΟΓΙΑ ΜΕΤΑΜΟΡΦΩΜΕΝΩΝ
• Geochemistry
• Geology
• LEROS ISLAND
• Metamorphic rocks
• METAMORPHIC ZONES
• Mineralogy
• Petrogenesis

Language dc:language

eng

Identifier

10.12681/eadd/0307

OAI identifier oai:identifier

oai:10442/0307