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Geometry and kinematics of brittle deformation in the Central Cameroon Shear Zone (Kékem area): implication for gold exploration within the Central Africa Fold Belt in Cameroon

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China Geology 2021年第2期4卷 245-255页

作者： de pesquidoux i tchaptchet tchato Jacqueline Tchakounte Aurélie Ngamy Kamwa Jean Pierre Tchouankoue Soumyajit Mukherjee department of Earth Sciences Faculty of SciencesUniversity of YaoundéIYaoundéP.O.BOX:812Cameroon department of Mining Engineering and Minerals processing Faculty of Mines and Pretrolum IndusriesUniversity of MarouaMaroua P.O.BOX:46Cameroon Geodynamics Laboratory Department of Earth SciencesIndian Institute of Technology BombayPowaiMumbai Maharashtra 410076India

The Central Africa Fold Belt(CAFB)is a collision belt endowed with gold deposits in Eastern Cameroon area mined for about 50 ***,favorable areas for gold exploration are poorly *** paper presents(1)the kinematics of the brittle deformation in the Kékem area in the SW portion of the Central Cameroon Shear Zone and(2)constraints gold mineralization events with respect to the collisional evolution of the *** authors interpret that the conjugate ENE to E and NNW to NW trending lineament corresponds to the synthetic(R)and the antithetic(R’)shears,which accompanied the dextral slip along the NE to ENE striking *** latter coincides with the last 570-552 Ma D3 dextral simple shear-dominated transpression,which is parallel to the BétaréOya shear zone hosting gold *** mineralizations,which mainly occurred during the last dextral shearing,are disseminated within quartz veins associated to Riedel’s previous structures reactivated due to late collisional activities of the CAFB as brittle *** mineralizations occurred mainly during the 570-552 Ma D3 *** reactivation,which might be due to dextral simple shear during mylonitzation,plausibly remobilized the early gold deposits hosted in syn-compressional rocks and/or possibly focused deep-sourced fluid mixed with those released by ***,the Central Cameroon Shear Zone where Kékem is located,and which shows similar petrographical and structural features to those controling Batouri gold district,is a target area for gold exploration in Cameroon.

关键词： Gold deposit Gold mineralization Gold exploration SRTM images Riedel fractures Simple shear Congo Craton Kékem Central Africa fold belt Cameroon

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