Figure 2. Archaean basement of the Pechenga structure in the KSDB section
[Mitrofanov and Vetrin, 1998].
1 - cross-bedded sandstone with conglomerate interbeds (Proterozoic),
2 - metamorphosed crust of weathering, conglomerate,
3 - biotite-plagioclase gneiss with high-alumina minerals,
4 - biotite-(amphibole)-plagioclase gneiss,
5 - BIF, amphibole-magnetite-quartz schist, 6 - para- and ortho-amphibolites,
7 - rocks of the amphibolite-tonalite-plagiogranite complex,
8 - syn- and post-folde plagiomigmatite, granite and pegmatite,
9 - muscovite-microcline metasomatic rocks,
10 - post-folded granite and pegmatite, 11 - chloritisation,
12 - contacts between layers and bodies, 13 - boundaries of rock units,
14 - mylonitisation, cataclasis, brecciation,
15 - tectonic faults and sutures,
16 - number of shafts in chronological order.