Geology, mineralogy and formation conditions "oskolskiy" gold-bearing conglomerates from KMA

The article came out in December, 2012 in the journal called "Prospect and Projection of Mineral Resources". The journal was founded in 1931 and now it has impact factor 0.202 (2010). It was a great experience to study such an ancient and interesting rocks as a precambrian (proterozoic) conglomerates, which underlay the Banded Iron Formation of Kursk Magnetic Anomaly (KMA).

Geology, mineralogy and formation conditions «oskolskiy» gold-bearing conglomerates from KMA

Onikienko L.D., Yuganov S.S., Zakharov D.O., Ivanov M.A. (MGRI-RSGPU)

In this article the characteristics of geological position and gold-uranium-bearing Precambrian conglomerates and gravelites Starooskol’sky area are shown. The results of the mineralogical and petrographic studies of the clastic rocks confirm the involvement of  explosive volcanic activity during the Late Archean-Early Proterozoic time. The pebbles of «blue» quartz are considered to be amygdales that have been taken from underlying volcanic rocks. Gas-hydrothermal systems were involved in ore-forming mineralization. 

Key words: Kursk magnetic anomaly, Starooskol’sky area, gold-bearing conglomerates and grits, Late Archean — Eatly Proterozoic volcanism, amygdales of blue quartz, gas-hydrothermal processes.

The pebble of blue concentrically colored qurtz. XPL.

The green mineral from mica group. The replacement of opaque mineral. PPL