REROCESSING AND REINTERPRETATION AND GRAVITY DATA USING OASIS MONTAJ SOFTWARE TO INTRODUCE STRUCTURAL MARKERS

Abstract

Geophysical Division in GEOSURV intends to reprocess and reinterpret the aeromagnetic and gravity database by using Oasis montaj software to introduce structural markers in Iraq. Structural markers will be inferred from the geophysical data for the whole Iraqi territory (except the northeastern part) at scale of 1:250000. Al-Najaf and Al-Nasriya Quadrangles, sheets Nos. NH-38-2 and NH-38-3, respectively, will be involved in this report as a map area. The map area is located within the Stable Shelf and Unstable Shelf, which is a part of the Arabian Plate. The northern part lies within Mesopotamia Foredeep, while the southern part lies within the Inner Platform. Several magnetic and gravity anomalies were identified in the map area. They were attributed to geological contacts, axis of anticlinal structures, and faults. 2D forward modeling and basement inversion processing were applied in this report. In addition, several processes and data enhancement have been applied through filtrations to distinguish in more certainty the type and to estimate the depth of the structures in the map area. Qualitative and quantitative interpretations were executed in this report. All the revealed structural markers were superimposed on the geological map so as to be of benefits for other applications.