Abstract

In the coastal zone, direct gravity survey is still sparse and uneven; in many areas, it cannot even be conducted due to complicated topography. Meanwhile, this area is covered entirely by satellite-derived gravity data. However, the satellite-derived gravity anomalies are not highly accurate compared with directly measured gravity anomalies, especially in coastal zones, islands, archipelagos, or areas with many underneath islands. Therefore, satellite-derived gravity anomalies need to be corrected to improve the accuracy for geological structure research of these regions, here in Vietnam northeastern coastal zone and the adjacent areas. In this study, the least squares collocation method is applied to correct and consolidate the gravity data on land and sea based on direct measurement and satellite gravity anomalies. The title angle method of the total horizontal gradient of the gravity anomaly is used to determine the locations and structural characteristics of the faults system in the area. Research results have shown the practicality and usefulness of integrating the satellite-derived gravity anomalies with direct measured gravity anomalies; It also shows the efficiency in the interpretation of the gravity data for determining and consolidating the land-sea faults system in the Vietnam Northeast coastal zone.