首页|Source of metals related to gold occurrences in Cameroon,Central African Belt
Source of metals related to gold occurrences in Cameroon,Central African Belt
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Suites of granitic and metamorphic rocks form a perfect geological environment in which to investigate the source of metals related to gold deposits.In the East Province of Cameroon,the source of metals-related gold(grade～4.6 g/t)that occurs within metamorphic and granitic rocks remains ambiguous.The host rocks were subjected to XRF and ICP-MS whole-rock geochemistry and BSE/EDS mineral analyses to investigate the source(s)of metals related to gold in the Province.Petrographically,chalcopy-rite-pyrite and magnetite-ilmenite are the main sulfides and oxides of granites,respectively.The low-grade metamorphic rocks are sulfide-rich consisting of arsenopyrite,chalcopy-rite,pyrite,and sphalerite,and oxides include magnetite,ilmenite,hematite,and rutile.Cu,Ni,Co,Sb,Sc,and Zn concentrations depleted in high-grade metamorphic rocks and granites compared to low-grade metamorphic rocks.As well,Bi,Cd,Co,Cu,Ni,Sb,V,W,and Zn concentrations decrease with increasing temperatures from low-grade rocks to high-grade rocks and granites.The suite of depleted ele-ments in high-grade rocks and granites is almost identical to those enriched in gold occurrences.We conclude that metals(Bi,Cd,Co,Cu,Ni,Sb,and Zn)related to gold mineraliza-tion in the East Province of Cameroon likely originated from metal-rich low-grade metamorphic rocks during prograde metamorphic processes prior to partial melting.
East Province of CameroonMetamorphic rocksGranitesOxide-sulfidesMetal and goldGeochemistry
Kevin Igor Azeuda Ndonfack、Jinlin Zhang、Yuling Xie、N.Samiratou Yaya、Emmanuel Archelaus Afanga Basua
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JCHX Mining Management Co.,Ltd,Beijing 101500,People's Republic of China
Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,People's Republic of China
JCHX Mining Management Co.,Ltd,%%Beijing 101500,People's Republic of China
School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,People's Republic of China
Department of Earth Science,University of Bamenda,Bamenda,Republic of Cameroon
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