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Volume :23 Issue : 2 1996      Add To Cart                                                                    Download

Shallow crustal structure in Kuwait based on gravity anomalies

Auther : FIRYAL BOU-RABEE

Department of Geology, Kuwait University, P. O. Box 5969, Safat 13060, Kuwait.

ABSTRACT

Interpretation of free air and Bouguer gravity anomaly maps provide new information about the crustal structure of Kuwait and surrounding areas. Using stratigraphic data constrained by deep boreholes drilled for oil exploration and the modeling of gravity data led to the construction of five cross sections (Fig. 1). The cross sections extend to depths of about 6,000 m, which are sufficient to portray the various Phanerozoic structural units throughout Kuwait. They provide definition of north to northwest trending anticlinal structures. Examples are the prominent gravity highs associated with the Kuwait and the Dibdibba Arches, which indicate their formation by simple uplift. These types of flexures had major influence on the accumulation of petroleum in the Arabian Gulf area. Most of the observed Bouguer anomalies are interpreted in terms of major subsurface structures (arches) and local troughs in the form of small basins. The Bouguer anomalies show no evidence of anomalous mass beneath Wadi al Batin, which suggests that either this valley is not controlled by structure, or that, if a fault is present, it juxtaposes lithologies of little or no density contrast.

 

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