GEOPRESSURED AQUIFERS AND _GEO THERMAL GRADIENT IN THE CHAD FORMATION IN BORNO STATE NIGERIA

Simple item page
dc.contributor.authorASKIRA, Muhammad Tukur
dc.date.accessioned2017-01-13T14:07:20Z
dc.date.available2017-01-13T14:07:20Z
dc.date.issued1987-07
dc.descriptionA THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL, AS PARTIAL FULFILMENT FOR THE AWARD OF MASTER OF SCIENCE (HYDR0GE0LOGY) DEGREE IN THE DEPARTMENT OF GEOLOGY, FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA. Department of GeologyFaculty of Science Ahmadu Bello University Zaria, Nigeriaen_US
dc.description.abstractTemperature maps were produced based on the data collected on: (a) Water temperatures from 63 boreholes tappinq water from the artesian aquifers of the Chad Formation, (b) Mean annual ground surface temperature for the state. Temperatures of ground surface and water in the borehole. were plotted on X-axis against depths to the mid screen positions in boreholes on Y-axis of a graph. Based on this, the map of the geothermal gradient was produced. The map shows NW _ SE elongated geothermal anomalies possibly correspond to troughs in the basin or correspond to fracture zones through which intrusions took place or represent concentrations of radioactive materials in the sediments or in the basement below; while the cool anomalies correspond to the ridges in the basin. Using the graphical extrapolation method, the temperature maps at 100m above mean sea level, at sea level. -100m below mean sea level and at -200m below mean sea level were produced. The geothermal gradient in the basin ranges between 2.00 and 6„00 oC/100c and there is a general trend that the gradients are higher towards the lake. Areas with higher gradients reflect higher water temperatures and this affects the PH and Eh o rm artesian waters have low pH values and this coupled with the high temperatures, increase the dissociation rates of some elements (eg. Fe++ end Na+ ) and salts. The higher iron concentrations in the waters from the Chad formation aquifers could therefore be related to the high temperatures.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/8453
dc.language.isoenen_US
dc.subjectGEOPRESSURED AQUIFERS,en_US
dc.subject_GEO THERMAL GRADIENT,en_US
dc.subjectCHAD FORMATION,en_US
dc.subjectBORNO STATE,en_US
dc.subjectNIGERIAen_US
dc.titleGEOPRESSURED AQUIFERS AND _GEO THERMAL GRADIENT IN THE CHAD FORMATION IN BORNO STATE NIGERIAen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
GEOPRESSURED AQUIFERS AND GEO THERMAL GRADIENT IN THE CHAD FORMATION IN BORNO STATE NIGERIA.pdf
Size:
5.33 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.62 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
SCIENCE