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Title
Determination of background and threshold for gold on the Bomburi Concession, North Western Ghana |
Full text
http://dspace.knust.edu.gh/dspace/handle/123456789/1109 |
Date
2002 |
Author(s)
Owusu, E.A |
Abstract
During the course of a mineral exploration programme by Ashanti-AGEM Alliance on the Bomburi Concession, northwest Ghana, about 2234 soils geochemical reconnaissance results for gold only were obtained as part of a multimedia sampling survey over defined stream anomalities. The results were based upon the minus 120-micron fraction by fire assay/AAS. In an attempt to establish the background and threshold of gold distribution on the concession, the soil results were grouped based on lithology into Cape Coast Granites (GI) Dixcove granites (G2) and Quartz-mica schist (QS) areas and statistical analysis performed. The determined statistical parameters of gold for the three different lithologies and the total dataset (TD) (i.e. a combination of G1, G2 and QS) were similar being positively skewed and multi-modal. The relative cumulative frequency curves for the four datasets also have similar characteristics of many bends representing possibly, several populations. The background levels for G1, G2, QS and TD were determined to be 22, 30, 25 and 18 ppb, respectively. The estimated threshold for G1, QS and TD were 25, 45, 35 and 36 ppb respectively. In view of the fact that the statistical parameters were similar, geological contacts were conjectural and that such contacts could be potential sources of gold mineralization, a background and threshold of 18 and 25 ppb, respectively were established for the Bomburi Concession. |
Language
en |
Publisher
Kwame Nkrumah University of Science and Technology |
Type of publication
Technical Report |
Identifier
Owus, E.A. Determination of background and threshold for gold on the Bomburi Concession, North Western Ghana. J. of Sci. And Tech., 22 (1,2&3): 50-58; 0855-0395 |
Repository
Kumasi - Kwame Nkrumah University
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