Types of clarified red-brown kimberlite-bearing Vend-Cambrian rocks of Zimneberezhniy district of Arkhangelsk region

Abstract

In Zimneberezhniy district of Arkhangelsk diamondiferous subprovincediagenetic, katagenetic (gleization) and endogenic types of clarification have been detected for host red-brown terrigenous Vend-Cambrian rocks due to mineral and element composition, geological position and forms of occurrence. Endogenic vein clarification differs by presence of saponite and concentrations of K, Fe, Zn, Rb, Sr, Ni. The aureole of endogenic clarification around Arkhangelsk kimberlite tube is shown. The size of the aureole reaches two diameters of crater.

Keywords

• архангельская алмазоносная субпровинция
• кимберлит
• вторичные изменения
• оглеение
• поисковые признаки
• типы осветления
• диагенетический, катагенетический, эпигенетический