John B. Brady
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View article: Pseudomorphs after Lawsonite from Syros, Greece
Pseudomorphs after Lawsonite from Syros, Greece Open
Syros is part of the Attic–Cycladic blueschist belt and consists principally of marbles, schists, and metabasites that have been metamorphosed to the blueschist- to eclogite-facies at about 52 Ma, with a greenschist-facies overprint beginn…
View article: Thermal History of the Upper Zone of the Kiglapait Intrusion
Thermal History of the Upper Zone of the Kiglapait Intrusion Open
A primary goal of igneous petrology is to understand the temperature range of crystallization for large intrusive bodies. Well-preserved layered intrusions, with their more or less stratigraphic mineral and compositional evolution, offer b…
View article: The system fayalite-albite-anorthite and the syenite problem
The system fayalite-albite-anorthite and the syenite problem Open
The presence in a magma of fayalite, the iron end-member of the olivine binary series, affects the feldspars at pressure by lowering the temperatures at which they crystallize from the magma. Starting with estimates from published literatu…