О ПОИСКОВОЙ РОЛИ ПЕРВИЧНЫХ МИНЕРАЛОВ КИМБЕРЛИТОВ

Brief information is provided on the results of research of diamonds and other primary minerals of kimberlites (pyrope, chrome-diopside, chrome-spinellid, clinopyroxene, picroilmenite and chromite) from diatremes of the Siberian diamondiferous province (SDP), which allowed defining of their typomorphic features. Distinguishing of four types of diamonds' primary sources (crystals from rich kimberlite bodies and with poor diamondiferousness, of unknown genesis and impact genesis) enabled working out criteria of regional and local zoning of perspective territories where primary and placer productivity were discovered. The obtained data allowed dividing SDP into four sub-provinces: Central-Siberian (central part of the platform) with prevalence of type I primary source; Lena-Anabar (north-east of the region) with prevalence of type III primary sources of unknown genesis; Tungusskaya sub-province (south-west of the platform) with rounded diamonds; Aldan sub-province (south-east of SDP) with finds of individual rounded diamonds.