TY  - JOUR
TI  - Interpretation of the Magma Chamber Processes with the Help ofTextural Stratigraphy of the Plagioclases (Konya-Central Anatolia)
AB  - The variations in the chemical composition and micro-texture of a mineral from the core to the rim allow the sequencing of the formationof the magma chamber processes and the interpretation of which texture might have been formed by which process. In this contribution,the textural and chemical zoning of the plagioclases, which are a significant recorder of magma chamber processes, from some enclave containing andesites (calc-alkaline) and basalts (calc-alkaline) from the Karapınar-Karacadağ Volcanic Units, were examined and theirtextural mineral stratigraphies were investigated to enlight the magma chamber processes. Plagioclases from the andesitic host-rock andtheir enclaves generally exhibit different composition from core to rim. The composition in the enclave ranges from oligoclase tolabradorite (core:An25-72), however, in the host rock it ranges from andesine to labradorite (core:An46-64). It is noteworthy that theplagioclases in the host-rock are mostly rounded, and reverse and oscillatory zoned with Anorthite, Fe, Mg, Sr, and Ba. However in theenclaves they display generally fine sieve and dusty sieve textures. The cores of the plagioclase micro-phenocrysts in calc-alkalinebasalts are andesine-labrador (An32-66) in composition. Remarkably, plagioclases in basalts show reverse and oscillatory zoning withAn, Fe, Mg, Sr, and Ba, and as well as exhibit coarse-grained sieve texture with glass and microlitic inclusions, and spongy cellulartextures. Combined with their An, Fe, Mg contents it is suggested that some of the plagioclases from the basalts may be xenocrystsrather than phenocrysts. Considering the textural and chemical properties of the plagioclases, in the formation of reverse and oscillatoryzoning in the basaltic rocks, the decompression processes in addition to the magma mixing processes (magma mixing/self-mixing) alsohave an impact on the genesis of the basalts. However, in the formation of andesitic rocks, the magma replenishment processes have akey role rather than decompression or temperature-pressure change.
AU  - Kurt, Hüseyin
AU  - Gencoglu Korkmaz, Gulin
DO  - 10.31590/ejosat.898587
PY  - 2021
JO  - Avrupa Bilim ve Teknoloji Dergisi
VL  - 0
IS  - 25
SN  - 2148-2683
SP  - 222
EP  - 237
DB  - TRDizin
UR  - http://search/yayin/detay/466527
ER  -