STRUCTURAL CONTROLS ON GOLD MINERALIZATION IN THE PALAEOPROTEROZOIC MAKO VOLCANIC BELT, SENEGAL

造山带金矿在各个尺度上对其位置和几何形状都有很强的构造控制作用。然而，目前尚不清楚不同尺度的构造是如何联系起来控制矿化的，涉及到什么时间尺度，以及是否需要多次变形/矿化事件来形成大型矿床。本项目旨在从四个方面提高我们对金矿构造控制的认识。西非古元古代是世界级的黄金大省，资源量约为9896吨。Mako火山带位于塞内加尔东部ksamdougou - ksamnisamba平原。该带由一套由2.2 ~ 2.0 Ga深成杂岩侵入的火山和火山碎屑岩组成。两个重要的亚平行构造，主横流剪切带（MTZ）和萨博达拉-索非亚构造（SSS）承载着经济金矿化。MTZ拥有260万盎司的Massawa金矿。SSS拥有230万z Sabodala矿床和Sofia卫星矿体。

Orogenic gold deposits have strong structural controls on their location and geometry at all scales. However, it is unclear how structures link across different scales to control mineralization, what time scales are involved, or whether multiple deformation/mineralization events are necessary to create a large deposit. This project aims to improve our understanding of structural controls on gold deposits in four dimensions. The Paleoproterozoic of West Africa is a world-class Au province, with resources of c. 9896 tons. The Mako Volcanic Belt is located in the Kédougou-Kéniéba inlier in eastern Senegal. The belt comprises a package of volcanic and volcaniclastic rocks intruded by 2.2 to 2.0 Ga plutonic complexes. Two significant subparallel lineaments, the Main Transcurrent Shear Zone (MTZ) and the Sabodala-Sofia Structure (SSS) host economic gold mineralisation. The MTZ hosts the 2.6 Moz Massawa Au deposit. The SSS hosts 2.3 Moz Sabodala deposit and the Sofia satellite ore body.