2613 5.1.4 by geological-tectonic setting Table 4 - Distribution of C-resources by tectonic setting of mineralisation in Mio t Tectonic position of mineralisation CResources all Share in % CResources producing operations only Share in % CResources exploration projects only Share in % Archaic Complexes Gneisses, granites 10.9 0.62 0.02 0.01 3.7 0.54 Greenstone belts 5.6 0.32 0 5,1 0.76 Granite intrusions 0 0 0 0 0 Ultrabas. Intr. 0 0 0 0 0 Sed. cover 142.6 8.11 95.5 28.69 0.25 0.04 Proterocoic complexes Proterocoic belts 712.4 40.52 152.7 45.89 497.0 73.19 L-prot. island arcs 0 0 0 0 0 0 Prot. sed. compl. 104.0 5.92 20.0 6.00 14.4 2.11 rifts 1,09 0.06 0 0 0 0 Anorog. magm. (Anorthosites) 1,3 0.07 0 0 1.3 0.19 Anorog. magm. (basic / ultrabas.) 0 0 0 0 0 0 Orogene belts Alpinotype orog. 15.9 0.9 1.48 0.44 0.09 0.01 Andinotype orog. 17.2 0.98 0 0 17.0 2.51 Island arc orogens 3.9 0.22 3.3 1.00 0,5 0.08 Postorog. Sediment cover 584.0 33.22 6.6 2.00 66.2 9.76 Anorogene phanerocoic magmatites 0 0 0 0 0 0 Sedimentary basin 0 0 0 0 0 0 Not (yet) attribut. 159.4 9.06 0 0 73 10.81 total 1758.0 0 0 679.1 100 The most significant graphite resources are therefore associated with highly metamorphosed sedimentary sequences of Neoproterozoic Belts. Nearly three-quarters of exploration projects are located in such tectonic units. In contrast to metallic raw materials, orogens are poor in graphite deposits.
RkJQdWJsaXNoZXIy MTM0Mzk2