Application of spectral analysis technique on ground magnetic data to calculate the Curie depth point of the eastern shore of the Gulf of Suez, Egypt (2014)

The bottom of the magnetized crust determined
from the spectral analysis of magnetic anomaly is interpreted as a level of the Curie point isotherm. A spectral
analysis technique was used to estimate the depth of the
magnetic anomalies sources (Curie point depth analysis) of
the eastern shore of the Gulf of Suez, Egypt. The depth to
the tops and centers of the magnetic anomalies are calculated by azimuthally averaged power spectrum method for the
whole area. The results obtained suggests from this study
showed that the average depth to the top of the crustal block
ranges between 1.15 and 1.9 km, whereas the average depth
to the center of the deepest crustal block ranges between 9.1
and 12.7 km. Curie point depths in the study area range
between 14.5 km in the northwestern part of the study area
and 26 km in the southeastern part of the study area. The
results imply a high geothermal gradient (34.7 °C/km) and
corresponding high heat flow value (72.87 mW/m2) in the
northwestern part of the study area. The southeastern part of the
study area displays a low geothermal gradient (24.26 °C/km)
and low heat flow value (50.9 mW/m2). These results are
consistent with the existence of the possible promising geothermal reservoir in the eastern shore of the Gulf of Suez
especially at Hammam Faraun area.