Causative Factors
The reasoning offered for the Yanar Dag fires is the result of hydrocarbon gases emanating from below the earth's surface. Apart from Yanar Dag, the most famous site of such a fire is the Zoroastrian Fire Temple near Baku, off the Greater Caucasus, which is a religious site known as ateshgahs, meaning temples of fire. It has also been inferred that such fires could be the cause for "thermal metamorphism".
Like Yanar Dag, the Ateshgah is also a seep through porous zones, and not a mud volcano, such as those found at Gobustan or Lokbatan.
According to the scientific study carried out by scientists and geologist of the Geological Survey of Azerbaijan, from four samples taken from the Yanar Dag, the maximum flux was recorded at the upper side of the fault scarp from where the flames emanate. The value of microseepage recorded was 103 mg•m22•d21 at 30 metres (98 ft) from the fire, on the upper part of the study area. It has been inferred that the total degassing area is clearly larger than the measured area, and it is very likely that the microseepage is pervasive along the fault zone. This fault scarp is also inferred as a part of the huge Balakhan-Fatmai structure on the Absheron Peninsula.
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