Processing results from parametric drill hole VNIIO-1986-NGul-01 at the North-Gulyaevskaya Area (Report 6171, Murmansk)

• Main Authors: Zaripov, Oktyabrist G, Pavlov, Leonid G, Ustinov, Nikolaj V, Preobrazhenskaya, Evelina N
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1987
• Subjects: Drilling/drill rig; VNIIO-1986; Archive of Ocean Data ARCOD; Barents Sea; Murmansk; Pechora; Pechora Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.690626; https://doi.pangaea.de/10.1594/PANGAEA.690626

Project: 4/86-88 - Study of lithologic-facial composition of rocks, correlation of sections, and compilation of reference collections of Mesozoic-Paleozoic deposits from the Barents and Kara Seas based on drilling materials.Area of drilling: Pechora Sea (South-East Barents Sea), the near-arch part of the North-Gulyaevskaya structure. 890 km from Murmansk and 210 km to the north-east from Naryan-Mar.Reasons for drilling:1. Comprehensive study of properties, composition and lithologic-facial features of sedimentary rocks from the geological section.2. Obtaining information for stratification of the section and its allocation with geophysical sections.3. Comparison of the section in study with earlier studied geological sections on the shelf and on land, study of regional variations of deposits and thicknesses of stratigraphic units.4. Ascertainment of peculiarities of geological sections uncovered by marine drill holes, their dissection and correlation. Study of composition of Mesozoic-Paleozoic deposits, making of reference rock collections.Technical results:The hole was drilled from 31.07.1986 till 16.10.1986. It has penetrated the section of 3072 m and stopped in Late Carboniferous deposits.Scientific results:1. Comprehensive lithologic and paleontological studies of drill samples from the hole have allowed to reveal lithologic features and to carry out detailed lithologic and stratigraphic sequence of the section composed of (from down to up) Late Carboniferous limestones, Early Permian carbonaceous-clayey series, and then Permian-Triassic, Jurassic-Cretaceous and Neogene-Quaternary terrigenous deposits.2. For the first time in a section of a marine drill hole the hiatus in the Late Carboniferous deposits has been demonstrated. Kasimovian deposits are absent in the section.3. Detailed characteristics of sediment matter composition have been done. Limestones of the Moscovian (Late Carboniferous, Pennsylvanian) formed in conditions of a mobile marine shoal. Late Permian terrigenous series formed in conditions of a near-shore shoal of a regressing sea and a low-lying deltaic plain. Early Triassic sandy-clayey deposits are chiefly continental.4. The rocks are characterized by high degree of catagenesis.5. From the Late Devonian till the Late Jurassic the North-Gulyaevskaya structure had a form of a double-plunging anticline.6. On matter composition and facial characteristics the deposits of the section correlate with coeval marine deposits and deposits of the adjacent continental part of the Timano-Pechorskaya province.