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Showing 1 to 5 of 5 for “"METAMORPHIC ZONES"”.
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Structural and petrologic aspects of the emplacement of granitoid plutons : case studies from the western margin of the Joshua Flat-Beer Creek-Pluton (White-Inyo Mountains, California) and the Flasergranitoid zone (Odenwald, Germany)
… a depth of c. 8 km. In the contact aureole three metamorphic zones were distinguished with decreasing distance from the pluton: the andalusite-cordierite, sillimanite, and cordierite-K-feldspar zones, respectively. The Na-in-cordierite thermometer gave c. 730 °C as the peak metamorphic temperature …
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Metamorphic and Tectonic Evolution of the Paleoproterozoic Thompson Nickel Belt, Manitoba
… work represents the first comprehensive regional metamorphic study of the belt. Three nested metamorphic domains are present in the Thompson Nickel Belt which are elongate subparallel to the regional strike of the belt. The metamorphic domains consist of a central middle amphibolite-facies zone …
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Polyphase Proterozoic tectonometamorphic history of the Taos Range, northern New Mexico
… Ga plutons. Supracrustal rocks preserve peak metamorphic conditions of T less than or equal to 650 degrees Celsius, 6-8 kb in the northern Taos Range, and T greater than or equal to 550 degrees Celsius, 6 kb in the southern Taos Range. In the northern Taos Range, relationships between field …
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The structure and metamorphism of the Santa Marta area, Colombia, South America
… by rocks comprising two distinct structural and metamorphic provinces. These correspond to the Concha Pornation to the north and the Gaira Group to the south. The Concha Formation is composed of fine-grained quartzo-feldspathic schists and massive chloritic feldspathic greenschists, the former …
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ΠΕΤΡΟΓΕΝΕΣΙΣ ΤΩΝ ΜΕΤΑΜΟΡΦΩΜΕΝΩΝ ΠΕΤΡΩΜΑΤΩΝ ΤΗΣ ΝΗΣΟΥ ΛΕΡΟΥ
… 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 …