Integrated Geophysical Methods to Investigate the Geological Structures and Hydrostratigaraphic Unit of the Aynalem Area, Southeast Mekelle

Gebregziabher, Berhanu (2003) Integrated Geophysical Methods to Investigate the Geological Structures and Hydrostratigaraphic Unit of the Aynalem Area, Southeast Mekelle. Masters thesis, Addis Ababa University.

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Abstract

Water is life. Without water life cannot exist. This integrated geophysical investigation in conjunction with geological survey is conducted in exploration for underground water supplies. Surface lithologic and structural mapping, refraction seismic, magnetic and electrical resistivty data were acquired for a project in the Aynalem area 5 km southeast Mekelle to aid in the search for ground water supplies. The geology of the area consisted of the Tertiary Dolerite dykes and sills intruded into a soft rock sedimentary terrain of Mesozoic age. From the oldest to the youngest the main rock units in the study area are; the limestone rock unit, the shale-limestone-marl intercalation unit, and the Dolerite rock units. The geologic work helps to select the appropriate profile directions for the geophysical survey and in the final interpretation of the geophysical results. The purposes of the geophysical surveys were to outline fractures and faults so as to locate possible water saturated zones and give an indication of lithologic differences. Accordingly, geologic structures such as fractures, faults, and geologic boundaries have been identified. In some parts of the study area (on the southeastern part) a depth to the water saturated zone is detected. The shallow subsurface dolerite intrusions are also identified at different depths. Most of the detected fractures and faults are aligned along NW–SE strike directions similar to the regional structures.

Item Type:	Thesis (Masters)
Subjects:	Q Science > Q Science (General) Q Science > QC Physics Q Science > QE Geology
Divisions:	Africana
Depositing User:	Selom Ghislain
Date Deposited:	23 May 2018 10:59
Last Modified:	23 May 2018 10:59
URI:	http://thesisbank.jhia.ac.ke/id/eprint/4053

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