ABSTRACT
Combinations of geological, geophysical and geochemical techniques have been
used to explore gold deposits at Misaki within the Iramba-Sekenke Greenstone Belt
(ISGB) in Singida region. The Misaki area is occupied by different rocks including
homogeneous coarse-grained granite containing numerous xenoliths (> 5 vol. %),
tonalite, K-rich granite and pegmatite, and dolerite dykes. All granitic rocks have
been intruded by dolerite dykes, cut by epidote veins and are found juxtaposed to a
tonalitic rock. Granitic rocks contain mainly anhedral to subhedral K-feldspar,
plagioclase, quartz, biotite, hornblende, muscovite and opaque minerals, whereas
tonalite contains similar minerals with relatively large amounts of plagioclase, biotite
and hornblende (> 10 wt. %) and no K-feldspar. The rocks are weakly foliated to
massive and poikilitic. K-feldspar is perthitic, whereas plagioclases have cores with
rim overgrowths. Chlorite, plagioclase, epidote and sericite in the rock formed at the
expense of primary minerals under greenschist facies conditions. Aeromagnetic data
managed to identify lineaments that crosscut different rocks, from which NE-SW,
NW-SE and ESE-WNW trends have been recognized. Results from radiometric data
mapped different lithological units by their different K, U and Th contents
distinguishing areas occupied by sediments or sedimentary rocks and those underlain
by granitoid rocks. Soil geochemical survey has identified gold anomalies of up to
0.2 ppm Au that in parts associated with NE-SW trending lineaments. A follow-up
detailed geological mapping work is recommended that would involve trenching and
sampling of unweathered rocks, and documentation of geological structures to
uncover potential gold deposits of the Misaki area within the Iramba-Senkenke
Greenstone Belt (ISGB).
MPANGILE, M (2021). Reconnaissance Exploration For Gold In The Misaki Area Within The Iramba-Sekenke Greenstone Belt, Central Tanzania. Afribary. Retrieved from https://track.afribary.com/works/reconnaissance-exploration-for-gold-in-the-misaki-area-within-the-iramba-sekenke-greenstone-belt-central-tanzania
MPANGILE, MAGANGA "Reconnaissance Exploration For Gold In The Misaki Area Within The Iramba-Sekenke Greenstone Belt, Central Tanzania" Afribary. Afribary, 27 Apr. 2021, https://track.afribary.com/works/reconnaissance-exploration-for-gold-in-the-misaki-area-within-the-iramba-sekenke-greenstone-belt-central-tanzania. Accessed 27 Nov. 2024.
MPANGILE, MAGANGA . "Reconnaissance Exploration For Gold In The Misaki Area Within The Iramba-Sekenke Greenstone Belt, Central Tanzania". Afribary, Afribary, 27 Apr. 2021. Web. 27 Nov. 2024. < https://track.afribary.com/works/reconnaissance-exploration-for-gold-in-the-misaki-area-within-the-iramba-sekenke-greenstone-belt-central-tanzania >.
MPANGILE, MAGANGA . "Reconnaissance Exploration For Gold In The Misaki Area Within The Iramba-Sekenke Greenstone Belt, Central Tanzania" Afribary (2021). Accessed November 27, 2024. https://track.afribary.com/works/reconnaissance-exploration-for-gold-in-the-misaki-area-within-the-iramba-sekenke-greenstone-belt-central-tanzania