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Showing 1 to 5 of 5 for “"Ultrabasic rocks"”.
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Platinum-group elements in the ultrabasic rocks of the Braganca and Morais massifs, northern Portugal
The ultrabasic rocks studied in this thesis are located in the Upper Allochthonous Thrust Complex nappes of the Braganca and Morais massifs, Träs-os-Montes, N. Portugal. They are relicts of residual mantle and cumulates formed at a destructive continental margin. In the Braganca massif, the …
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ΜΕΛΕΤΗ ΤΗΣ ΟΡΥΚΤΟΛΟΓΙΑΣ, ΠΕΤΡΟΛΟΓΙΑΣ, ΓΕΩΧΗΜΕΙΑΣ ΚΑΙ ΤΩΝ ΦΑΙΝΟΜΕΝΩΝ ΜΕΤΑΜΟΡΦΩΣΕΩΣ ΒΑΣΙΚΩΝ ΚΑΙ ΥΠΕΡΒΑΣΙΚΩΝ ΠΕΤΡΩΜΑΤΩΝ ΤΗΣ ΠΕΡΙΡΟΔΟΠΙΚΗΣ ΖΩΝΗΣ ΣΤΗΝ ΠΕΡΙΟΧΗ ΤΗΣ ΘΡΑΚΗΣ
… FROM ALL THE PETROLOGICAL TYPES OF THE BASIC AND ULTRABASIC ROCKS OF THE CIRCUM-RHODOPE BELT IN THE AREA OF THRACE PERMITTED SAME IMPICATIONS RELATED TO THEIR PETROGENESIS. THUS, THE GEOTECTONIC SETTING WAS A SYSTEM OF ISLAND ARE-MARGINAL BASIN. THE PRIMARY MAGMAS OF THE PROTOLITHS FORMED IN TWO …
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Petrology of the Ashe Formation, Shortt's Knob area, Floyd County, Virginia
… and studied petrographically and chemically. The rocks have been metamorphosed into the lowermost amphibolite facies and folded. The gross structure is homoclinal, generally N 80° E, >50°SE. Amphibolites (39%), chlorite schists (8%), and quartzofeldspathic schists and gneisses (53%) are the major …