Hasandağ doğusu (Niğde) volkaniklerinin petrolojik modellemsi

Thesis area covers Aksaray L32-c1-c4-d2-d4 maps of 1/25.000 in scale. Key locations at Hasandag include Helvadere, Yenipinar, Comlekci, Ulukisla, Uluoren, Karakapi, and Akcakent volcanic units, which were studied in detail both petrographically and geochemically by using optical and opaque microscope, ICP-MS, XRF, and powder XRD. All units were composed of andesite, trachyandesite, basaltic andesite, dacite, and rhyolite; subalkaline and calcalkaline with medium-K; and according to Wood (1980) Hf/3-Th-Ta, Hf/3-Th-Nb/16, Zr/117-Th-Nb/16 discriminant diagrams, it represent the d region which is destructive plate margin basalts and its differentiates. These units in Spider diagrams show enrichment of LREE as compared to HREE; slight depletion of Eu; substantial depletion of P, Pb, and depletion of Ta, Nb, Ti, and Sm. Uluoren volcanic unit was composed of several basalt flow structures and were distinguished by using Google Earth images. CIPW norms computed from the results obtained from XRF data show slight differences exits between the two structures. Flow structure-I composed of quartz (30%), plagioclase-andesine (55%), orthoclase (8%), and others (diopsite-1%, enstatite-ferrosilite (=hypersthene)-5%). Flow structure-III composed of quartz (26%), plagioclase-andesine (53%), orthoclase (10%), and others (diopsite-2%, enstatite-ferrosilite-7%, magnetite-1%). Opaques are mostly composed of magnetite, hematite, and ilmenite. Powder XRD study showed that almost all plagioclase are andesine.

Department dc:contributor.department

Jeoloji Mühendisliği

Grantor dc:publisher

Fen Bilimleri Enstitüsü

Year dc:date.issued

2008

Author dc:creator

• Tosun, Şebnem

Advisor dc:contributor.advisor

• Doğan, A. Umran

• Volkanitler
• Petrografi

Language dc:language.iso

tr

Handle dc:identifier.uri

http://hdl.handle.net/20.500.12575/79999

OAI record oai:identifier

https://dspace.ankara.edu.tr/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Adspace.ankara.edu.tr%3A20.500.12575%2F79999