Open AccessOrbicular monzodiorites from the NW part of the Plana pluton – preliminary results
Author(s) -
Stefka Pristavova,
Svetlana Encheva,
Petar Petrov,
Petko Petrov
Publication year - 2021
Publication title -
spisanie na bʺlgarskoto geologičesko družestvo/spisanie na bʺlgarskoto geologičesko družestvo
Language(s) - English
Resource type - Journals
eISSN - 1314-8680
pISSN - 0007-3938
DOI - 10.52215/rev.bgs.2021.82.3.64
Subject(s) - plagioclase , pluton , mafic , gabbro , geology , geochemistry , amphibole , petrology , pyroxene , olivine , basalt , quartz , seismology , paleontology , tectonics
New for Bulgaria, orbicular rocks among monzodiorite from the NW part of the Plana pluton are presented. They comprise a central core of mafic segregation with gabbro composition (mainly of amphibole and plagioclase), surrounded by pyroxene and plagioclase-rich “shells” or rims, with the outer rim in sharp contact with the monzodiorite matrix.