Integration of remote sensing and geographic information systems for geological fault detection on the island of Crete, Greece
2019
Abstract. Fracture systems are of great importance in the field of structural geology.
Faults commonly afford easy passage to groundwater and fluids such as
hydrothermal fluids and magmas or even contribute to earthquake hazard
monitoring. For a geologist, it is not always easy to discern such
morphotectonic structures at close range. Both remote sensing techniques and
spatial modeling permit the recognition and better understanding of the
brittle tectonics in an area. This study was an effort to delineate the
tectonic structures on Crete by combining Sentinel-2 satellite
data and spatial data. For the enhancement and better discrimination of
photolineaments primarily recognized on satellite imagery, a variety of
enhancement techniques has been applied. The evaluation of a photolineament
as a potential fracture zone was based on several factors: the DEM of the
study area, the shaded relief, the slopes and corresponding aspects, the
drainage network, the geology and general observations on vegetative coverage
appearance. The application of these methods revealed several fracture zones,
which we recommend be certified by field investigations. Fault-mapping
results may be used for a variety of geological and hydrogeological studies.
Indicative places of a large concentration of groundwater are of vital
importance for subsequent exploitation by areas of need. The present work may
provide useful information for further analysis by geophysicists and
seismologists.
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