Title

V.F. PROSKURNIN, A.V. GAVRISH, O.V. PETROV (VSEGEI), A.S. GALKIN (PJSC “Severalmaz”), N.P. VINOGRADOVA, M.V. NAUMOV (VSEGEI), V.I. SILAEV (ИГ Коми НЦ УрО РАН), L.I. LUK'YANOVA, E.E. RONINA, V.A. SALTANOV (VSEGEI)

Potentially diamondiferous Early Mesozoic injection breccias at the Eastern Taimyr Peninsula

Petrographic, mineralogical, and geochemical features of injection breccias erupting the Triassic sequence at the Tsvetkov Cape (Eastern Taimyr) are given. The rock is identified as a special type of fluidic­-explosion formations of presumably Middle to Late Triassic age. It forms high­angle bodies containing some material from deep­seated rocks. Fluidic-­explosive breccia contains pyrope, picroilmenite, chromous diopside and chromous spinel (the latter is highly predominant) that are analogous by composition and image to the minerals from diamondiferous formations – Сarnian basal horizon and Angardam­-Tasa complex. This makes possible to assume that the fluidic-­explosion breccia can be a source of diamonds and associate minerals in Сarnian collectors. Both large-­volume sampling of the revealed explosion rocks and prospecting along the southern edge of the Byrranga Mountains are recommended to test this hypothesis.
Keywords: fluidolite, injection breccias, Taymyr Peninsula, diamond­bearing rocks, Triassic.