Composition and origin of igneous rocks in the sequence of well on Leskinsky license area
https://doi.org/10.51890/2587-7399-2022-7-4-134-141
Abstract
The article presents for the first time the study of igneous rocks in the section of well on Leskinsky license area of the West Taimyr potential oil and gas bearing area. Fragments of igneous rocks from the Early Silurian to the Early Triassic age were studied from samples of drill cuttings and core.
Aim. Characterization of igneous rocks from the well section based on drill cuttings and core samples and interpretation of their nature and structural position in the section based on petrological and geochemical data.
Materials and method. The material was studied by electron microscopy, microanalysis and analysis of the trace elements content by mass spectrometry.
Results. Igneous rocks in the section of the well on Leskinsky license area can be interpreted as lava and dolerites re-deposited as conglomerates and gravelites in the upper part of Lower Triassic deposits, and in the lower part as lava flows overlain by a pack of conglomerates and gravelites with a thickness of 40-50 meters. Individual dolerite sills with a thickness not exceeding several meters are marked below the section in the Lower Silurian, Middle-Upper Devonian and Lower Carboniferous intervals.
Keywords
West Taimyr potential oil and gas bearing area,
Paleozoic,
dolerite sills,
fragments of volcanic and subvolcanic rocks
Supporting agencies: Author is grateful to G.G. Akhmanov, E.A. Bakay and N.V. Morozov for valuable comments to the manuscript.
About the Author
V. D. Shcherbakov
Lomonosov Moscow State University
Russian Federation
Russian Federation
Vasily D. Shcherbakov — Сand. Sci. (Geol.-Min.), Senior scientist at Faculty of Geology
1 Leninskie gory, GSP-1, Moscow, 119234, Russia
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Review
For citations:
Shcherbakov V.D. Composition and origin of igneous rocks in the sequence of well on Leskinsky license area. PROneft. Professionally about Oil. 2022;7(4):134-141. (In Russ.) https://doi.org/10.51890/2587-7399-2022-7-4-134-141
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