RE: Mac11 Jul 2021 14:01
Old Monchetundra work -
"ESSAY. Purpose of the work: study of the features of the geological structure of the Monche-Tundra massif, localization of areas promising for platinum-metal mineralization, assessment of the predicted resources of platinoids of categories P1 + P2. Methods: electrical prospecting over a network of 50 Γ 10 m - 3.2 sq. km, prospecting routes - 34.63 l. km, mining operations - 1 ditch with a volume of 543 cubic meters. m, drilling of 52 prospecting wells with a volume of 10414.6 linear meters, sampling: furrow (38 samples / 34.5 linear meters), core (6143 samples), spot (12 samples) and lithogeochemical (1598 samples), mineralogical -technological research (6 samples), laboratory-analytical and office work. As a result of the work, the internal structure of the Monchetundra massif was clarified, in which four zones (from bottom to top) are distinguished: pyroxenite, norite, gabbronorite, and gabbro. In the central part of the pyroxenite zone, there is a harzburghite horizon with uneven chromite and platinum-metal mineralization. Of greatest interest is the upper thinly layered part of the norite zone with a thickness of 130 m in the central part to 15 m in the northern part of the area, represented by alternating medium-grained orthopyroxenites, medium-grained norites, and coarse-grained plagioclase orthopyroxenites with disseminated sulfide and platinum-metal mineralization. The transition to the overlying gabbro, which composes the central part of the Monchetundra massif, occurs through the zone of alternation of medium-grained gabbronorites and coarse-grained gabbros. Within the Monchetundra massif, 3 blocks with platinum-metal mineralization have been identified, the predicted Pt + Pd resources of the P1 + P2 categories are estimated at 31.8 tons, including the P1 category - 20.8 tons, P2 - 11.0 tons."
https://rfgf.ru/catalog/docview.php?did=ccb0e6c6c4e37fcac74dba5ff99763b5
GLA