THE GEOLOGY, GEOCHEMISTRY AHD POSSIBLE ORIGIN OF GOLD MINERALIZATION AT DUKKI OLD MINE, MARU ZAMFARA STATE, NIGERIA
THE GEOLOGY, GEOCHEMISTRY AHD POSSIBLE ORIGIN OF GOLD MINERALIZATION AT DUKKI OLD MINE, MARU ZAMFARA STATE, NIGERIA
No Thumbnail Available
Date
2000-07
Authors
SALAU, SIDIKAT LAMI
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The Dukki Old gold mine is situated within the Precambrian to
Lower Paleozoic Maru schist belt of NW Nigeria. The belt consists of
meta-sediments, meta-igneous rocks (schist belt lithologies) and granitic
intrusions. The meta-sediments and meta-igneous rocks have been
deposited on older basement gneiss-es and mitigates and both units
were deformed together and intruded by the Pan-African granites.
The gold mineralization comprises series of N-S auriferous veins
hosted in the sheared zone within series of silicified schists/phyllites
and quartzite s. Geophysical survey using the EM/VLF method was
carried out at Dukki mine area, which defined the auriferous veins and
revealed concealed mineralized zone. The mineralized zones
discovered correspond with the limits of the old workings. Free gold
occurs in quartz. Other vein constituents are sericite, magnetite,
limonite, limonite and pyrite in minute quantities. Wallrock alteration
processes include; silicification, sensitization and harmonization.
Based on petrographic, structural and geochemical characteristics, the
Dukki gold mineralization is inferred to have been an epigenetic type,
controlled by late tectonic faults that developed along regional
anticline axis during the closing stages of the Pan-African event. The
mineralization fluids were possibly sourced from within the crustal
meta-sedimentary rocks of the schist belt, probably along original
trans-current fracture systems that developed during the waning stages
of the Pan-African events.
Description
A THESIS SUBMITTED TO THE POSTGRAUDATE
SCHOOL, AHMADU BELLO UNIVERSITY IN
PARTIAL FULFILLMENT OF THE REQUIREMENTS
FOR THE AWARD OF THE DEGREE OF MASTER
OF SCIENCE
DEPARTMENT OF GEOLOGY
FACULTY OF SCIENCE
AHMADU BELLO UNIVERSITY
ZARIA
JULY, 2000
Keywords
GEOLOGY,, GEOCHEMISTRY,, POSSIBLE,, ORIGIN,, GOLD,, MINERALIZATION,, DUKKI OLD MINE,, MARU,, ZAMFARA STATE