An Extensional Fracture Acting as Hot Water Source for Travertine Deposition on the North Anatolian Fault Zone, Turkey: the Resadiye Fissure-Ridge


MESCİ B. L. , GÜRSOY H. , Ghaleb B., TATAR O.

TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY, cilt.63, ss.145-160, 2020 (ESCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 63 Konu: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.25288/tjb.623535
  • Dergi Adı: TURKIYE JEOLOJI BULTENI-GEOLOGICAL BULLETIN OF TURKEY
  • Sayfa Sayıları: ss.145-160

Özet

The Resadiye (Tokat) geothermal field is located in the northern part of the right-lateral North Anatolian Fault Zone. Geothermal waters at temperatures between 48-52 degrees C from this geothermal field are currently used mostly in hotels, pools and bathrooms and provide significant tourism potential for the region. The area where the geothermal sites are located includes a similar to NW-SE trending fissure-ridge type travertine with a length of about 600 meters. Approximately 500 meters south of the geothermal field and parallel to the Kelkit River, the active segment of the North Anatolian Fault Zone comprises the Kelkit Valley fault segment extending N72 degrees W. The average strike direction of Resadiye fissure-ridge type travertine is around N33 degrees W. There is an angle of 39 degrees between the master trend of NAFZ and the direction of the Resadiye fissure-ridge travertine. This 39 degrees angle between the extensional cracks in the fissure-ridge travertine and the NAFZ is compatible with extensional fractures developing in well-formed strike-slip faults at an angle of similar to 45 degrees with the master fault. U/Th determination of two samples from banded travertines from the travertine deposits yielded ages of 7,563 and 12,529 years. Combined with other evidence, the samples indicate an opening rate of 0.093 mm/year for the Resadiye geothermal travertine field.