- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
APPLICATION OF TERRAIN CORRECTION FOR MICROGRAVITY DATA | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 4, Issue 2, 2008, Pages 43-50 | ||
| Author | ||
| Samir R. Hijab | ||
| Abstract | ||
| Microgravity measurements were carried out on a hill, which has relative elevation of about 30 m above the surroundings. The elevated area is located near the center of Sulaimaniyah city in the northeast of Iraq. The measurements were carried out for detecting any subsurface cavity and to delineate weakness zones, in comparison with the surroundings for engineering purposes. One hundred and five microgravity stations were measured in this survey. Conventional corrections, Bouguer slab and free air in addition to terrain correction were applied to get Bouguer gravity values. The website Google earth was utilized to obtain elevations and topography of the hill for calculating the terrain correction. 3D contour maps were drawn to represent three cases of Bouguer gravity values: the first was without terrain correction, the second includes terrain correction, extending to 50 m around each microgravity station and the third one was with terrain correction extending to 100 m around each microgravity station. The comparison between the three maps showed that it is not preferable to calculate the huge mass of the surroundings, like the elevated hill, when the area under study is small and the anomaly is small too, but it is preferred to calculate terrain correction, when delineation of weakness zones for engineering geological purposes is dealt with. | ||
|
Statistics Article View: 63 PDF Download: 32 |
||