Determination of Hydrothermal Alteration Areas by Aster Satellite Images: Ağmaşat Plato- Zara (Sivas) / Turkey Sample

Yıl 2017, Cilt: 38 Sayı: 3, 419 - 426, 30.09.2017

Oktay Canbaz Önder Gürsoy Ahmet Gökce

https://doi.org/10.17776/csj.340473

Cited By: 6

Öz

Determination of hydrothermal alteration areas is one of the first stage
methodes used in mineral exploration studies, particularly of porphyry type
mineralizations. These studies were only possible by field investigations in
the past, but now, they can be easily detected with images from satellites, in
accordance with the developing technology. In this study, contacts between
geological units and the border of the hydrothermal alteration zones were
determined with SWIR images of ASTER in Ağmaşat Plato, located in the north of
Zara district of Sivas province. Decorrelation stretching and principal
component analysis were carried out on the SWIR images. The obtained results
highly coincide with the geological map which was prepared during the field
studies. These results will lead to the discovery of new potential fields.

Anahtar Kelimeler

Hydrothermal Alteration, Zara-Sivas, Eocene Volcanic Rocks, Decorelation Stretching, Principal Component Analysis

Aster Uydu Görüntüleri ile Hidrotermal Alterasyon Alanlarının Belirlenmesi: Ağmaşat Yaylası-Zara (Sivas) / Türkiye Örneği

Öz

Hidrotermal alterasyon alanlarının tespiti, maden arama faaliyetlerinin
ilk aşamalarından bir tanesi olup özellikle porfiri tip zenginleşmelerin
keşfinde önemli bir adımı oluşturmaktadır. 
Önceleri arazi çalışmaları ve gözlemlerle tespit edilebilen bu tür
alanlar artık günümüzde gelişen teknoloji ile birlikte uydulardan elde edilen
görüntüler üzerinde yapılan işlemlerle tespit edilebilmektedir. Bu çalışmada
Sivas ilinin Zara ilçesinin kuzeyinde Ağmaşat Yaylası'nda belirlenen
hidrotermal alterasyon alanlarının ve çevre jeolojik birimlerinin sınırları
ASTER uydusu SWIR görüntüleri ile belirlenmeye çalışılmıştır. Uygulanan
dekorelasyon gerilmesi ve ana bileşenler dönüşümü metodları ile elde edilen
veriler, arazi çalışmaları sırasında hazırlanan jeoloji haritası ile yüksek oranda
örtüştüğü belirlenmiştir. Bu veriler ışığında tespit edilebilecek yeni
alterasyon alanları potansiyel maden sahası olarak değerlendirilebilecektir. 

Anahtar Kelimeler

Hidrotermal Alterasyon, Zara-Sivas, Eosen Volkanitleri, Dekorelasyon Gerilmesi, Ana Bileşenler Dönüşümü

Kaynakça

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