Open AccessGRANULOMETRY OF DIAMONDS IN THE PERM TERRITORY ACCORDING TO PROSPECTING DATA IN THE 1940S - 1970S
Author(s) -
Тимур Валерьянович Харитонов
Publication year - 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.17072/chirvinsky.2021.274
Subject(s) - kimberlite , placer mining , prospecting , geology , placer deposit , granulometry , diamond , geochemistry , mineralogy , geomorphology , sediment , materials science , metallurgy , mantle (geology)
The distribution curves of the equivalent diameters of diamonds from modern placers in the Cis-Urals are close to the normal law and have two dimension peaks: in the intervals 2 - 3 and 4 - 5 mm, i.e. placer diamonds come from two sources. A peak of smaller size characterizes the dimension of diamonds of not yet identified kimberlites - a kimberlite peak, the second peak of larger diamonds is characteristic of secondary reservoirs - a peak of collectors. In the modern placers of the Northern Urals, diamonds come from two sources, in the modern placers of the Middle Urals, diamonds from secondary reservoirs predominate.