Kapadokya Bölgesi İgnimbiritlerinin Muhtemel Kaynak Bölgelerinin Manyetik Hassasiyet Anizotropisi (AMS) Yöntemiyle Tespit Edilmesi
Özet
Kapadokya ignimbrites are pyroclastic rocks that have settled as a result of
volcanism throughout the Neogene and cover large areas in Central Anatolia.
Although some studies have been made regarding the source areas of these
ignimbrites, the mystery of their source areas remains. To solve this mystery and
determine the possible source areas of the ignimbrites, traditional volcanological
methods as well as the anisotropy of magnetic susceptibility method (AMS) have
been used. The types of components controlling the magnetic susceptibility of the
ignimbrites have been determined by EDS studies. It has been determined that
the main components controlling magnetization are iron oxide minerals such as
magnetite, titanomagnetite, ilmenite, and that biotite and pyroxene minerals are
effective in forming the magnetic patterns of the samples. 23274 total magnetic
measurements were taken from 1293 directional core samples, AMS parameters
were determined, AMS ellipsoids were created, and the magnetic properties of
the ignimbrites were revealed. The flow direction of the ignimbrites was
determined by using the AMS method, and the path of the pyroclastic flows in valleys was clearly revealed by this method. Along with the flow direction obtained
from the AMS method, the dispersal of the ignimbrites, the grain size distribution
maps of the pumices and lithics in the fallout products, the thickness of the fallout
products, and the orientation of the particles in the flow unit were combined to
propose possible source areas for the ignimbrites. The Çardak Caldera was
proposed as a possible source area for the Kavak Ignimbrite, the Acıgöl region
for the Zelve Ignimbrite, the Çardak Caldera for the Sarımadentepe Ignimbrite,
the Güzelyurt Caldera for the Gördeles Ignimbrite, the Orhanlı region for the
Kızılkaya Ignimbrite, and the Koçdağ Caldera for the Valibabatepe Ignimbrite.
