Title

M.D. SIDOROV, V.V. TASKIN (RGC FEB RAS), N.A. VESHNYAKOV (JSC SIC “Geotechnology”)

Density irregularities in upper crust of Shanuch ore district and the problem of detecting unopened nickel intrusion (Kamchatka median massif)

The main purpose of the paper is to discover the structures which are potentially prospective for nickel, their location and shape. The interpretation of gravity anomalies of Shanuch ore district was made. Three­dimensional density model of the upper crust up to the depth of 20 km was created. Solid blocks with nonerodible basic intrusions which are possible ore parent magmatic systems were allocated. Local maximums Δg in the basins of the Rivers Icha, Himka, Malaya Himka, Oblukovina and Kamchatsky Brook correspond to the blocks. These allotments are prospective for copper­nickel­sulphide ore deposits search. Geostatistical analysis of a remote sensed data interpretation of Shanuch ore field was made. Possible routes of migration for depth magmas and fluids to upper crust stages were determined.
Keywords: density, model, anomaly, intrusion, median massif, nickel.