PETROSTRUCTURAL SIGNATURE OF OLIVINES IN ULTRAMAFIC ROCKS OF THE PARAMSKY AND SHAMANSKY MASSIFS (Baikal-Muya ophiolite belt)
A.I. Chernyshov
Tomsk State University, 36 ul. Lenina, Tomsk, 634050, Russia
Keywords: Ophiolites, ultramafic rocks, olivine, plastic deformation, petrofabric, thermodynamic conditions, dislocations, Baikal-Muya belt
Pages: 1103-1114
Subsection: PETROLOGY, GEOCHEMISTRY AND MINERALOGY
Abstract
The olivines in dunites and harzburgites of ophiolite massifs in the Baikal-Muya belt are characterized by a great diversity of deformations with a regular change of microstructural types: protogranular, mesogranular, porphyroclastic, porphyrolath, mosaic, mosaic-lath, and parquet-like. Petrofabrics of the petro- and mesogranular types have been formed by the translation slip and static annealing recrystallization at 1100-1300
|
