Amerika, Orta Teksas’ta Yer Alan Edwards Akiferi’nde Karstik Yapıların ve Fay Karakterizasyonunun Bütünleşik Jeofizik Yöntemler Kullanılarak Araştırılması

Yıl 2019, Cilt: 62 Sayı: 2, 113 - 140, 01.04.2019

Mustafa Sarıbudak

https://doi.org/10.25288/tjb.545084

Öz

Teksas’ın merkezinde yer alan Edwards akiferi üzerinde yapılan hidrojeolojik araştırmalarda kullanılan jeofizik yöntemler önemli bir bileşen olmuştur. Jeolojik yapıyı ve stratigrafiyi haritalamak, gömülü obrukların ve mağaraların yerlerini tespit etmek için çeşitli elektrik ve elektromanyetik yöntemler kullanılmıştır. Jeofizik yöntemler ayrıca Balcones Fay Zonu’nda (BFZ) yer alan fayları ve kırıkları tanımlayabilmek için de kullanılmıştır. Austin bölgesindeki Edwards akiferi boyunca altı ayrı sahada yürütülen çalışmalar, gömülü mağaraların ve obrukların konumları ile bölgedeki fay karakterizasyonlarının iki boyutlu (2B) ve üç boyutlu (3B) özdirenç ve doğal potansiyel (SP) yöntemlerinin bütünleşik kullanımı ile en iyi şekilde belirlenebileceğini göstermiştir. Yer radarı, indüksiyon polarizasyon ve sismik kırılma tomografisi gibi ilave jeofizik yöntemler kullanılarak da faylar ve karstik yapılar belirlenebilir. Bununla birlikte, yöntemlerin başarılı bir şekilde uygulanmasının bölgeye özgü olduğu belirtilmelidir; farklı bölgelerde yapılan çalışmalarda karstik yapıların araştırılmasında farklı jeofizik yöntemler farklı cevaplar verebilir ve farklı birincil jeofizik yöntemler tercih edilebilir.

Anahtar Kelimeler

Edwards akiferi, faylar, jeofizik, mağaralar, obruklar, Texas

Kaynakça

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