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Location: 165 km SE from Karaganda, Kazakhstan
8/110 Hay St SubiacoPerthWestern Australia, Australia6008
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The Sarytogan deposits are in the core of two northeast trending folds. The stratigraphy consisting of volcanic and carbonaceous sedimentary rocks. A granite pluton intruded the rocks with extensive contact metamorphism causing hornfels alteration including graphitisation of the carbonaceous rocks. Graphite-bearing black carbonaceous shale, siltstones and sandstones are overlain by grey- to dark-grey weakly carbonaceous siltstones and sandstones. Exploration has identified two zones of graphitic sediments being the Sarytogan Central and Sarytogan North graphite deposits.Structurally, the Sarytogan site is confined to the western and southwestern wing of the Shiyozek fold, complicated by a large curved Sarytoganbai syncline which trends in northeast and east directions. In general, the Sarytogan site is a large, over-intrusive zone; the volcanic and sedimentary rocks developed here have undergone extensive contact metamorphism; volcanogenic and terrigenous rocks are transformed into quartz-biotite, quartz-sericite hornfels; carbonaceous rocks are either altered into hornfels, or underwent significant graphitisation, and along contacts with intrusive granite domes, quartz- tourmaline and tourmaline hydrothermal rocks of the greisen type are developed. The deposit belongs to the black shale regional-metamorphic type and represents a carbon-bearing conglomerate sequence with a greisen zone with a thickness of more than 80 m in the over-intrusive zone of the granite massif that compose the Sarytoganbai syncline. Host rocks include graphite siltstone and graphite shale.DimensionsThe currently interpreted mineralisation of the Sarytogan area extends for approximately 3.2m km for the North zone and 3.2 km for the Central zone along a 40° northeast strike. The zone extends from surface to 240 m depth below the surface in the North zone and 105 m depth below the surface in the Central zone.