Results 141 to 150 of about 1,820 (158)

Silicification of Riphean Carbonate Sediments (Yurubcha-Tokhomo Zone, Siberian Craton)

Lithology and Mineral Resources, 2005
Types and lateral and vertical distribution of silicification in Riphean (largely dolomitic) rocks of the Yurubcha-Tokhomo zone of the Siberian Craton are discussed. It is shown that quartz and pyroclastic material in sediments were subjected to intense dissolution in a highly alkaline Riphean basin with the release of silica. Rapid and abrupt decrease
V. G. Kuznetsov, N. M. Skobeleva
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Approaches to Studies of Fractured Riphean Reservoirs, Kuyumba Oilfield

Proceedings, 2014
This work is related to the issues in focus of exploration of the opened fractured zones in the riphean deposits that are productive on the Kuyumba field. Studying of the core samples show several stages in fracture origin, one of those are mineralized and another are opened and good to be studied by this paper.
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Lithofacies Model of Riphean Formation of Yurubcheno–Tochomskoe Field

Proceedings, 2010
Carbonate oil reservoirs have complex structure and vertical and lateral variations of properties. Carbonate rocks are highly transformed by secondary processes, which may entirely change the structure of rocks and the cavity geometry. A geological model of carbonate oil reservoir must take into consideration all of the following factors: the detailed ...
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RIPHEAN OPHIOLITES OF THE ISAKOVKA BELT (Yenisei Ridge)

Russian Geology and Geophysics, 1994
Structure and rock composition of the Isakovka ophiolite belt within the northwestern part of the Yenisei Ridge were considered. Oceanic and island-arc tectonically related allochthon complexes covering continental margin of the Siberian platform were distinguished.
V. A. Vernikovskii, A. E. Vernikovskaya, A. D. Nozhkin, V. A. Ponomarchuk   +3 more
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Rugosoopsis : a new group of Upper Riphean animals

Geological Society, London, Special Publications, 2007
Abstract The Upper Riphean Lakhanda biota (from the Uchur-Mayai region of SE Siberia) contains abundant, well preserved and highly biodiverse microfossil assemblages including Rugosoopsis microfossils, characterized by a uniform shape, with prominent closely transversely spaced wrinkles on the outer ...
T. N. Hermann, V. N. Podkovyrov
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Riphean Stromatolites from Western Lower Himalaya, Himachal Pradesh, India

1977
Stromatolites have been found to be useful tools in the correlation of the Late Precambrian or Riphean stratigraphic sequences, following rapid development of new methods of study and classifications in the USSR, Australia, and USA (Semikhatov, 1962; Krylov, 1963.
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Mineralogy and petrography of Riphean rocks in the Moscow graben

Lithology and Mineral Resources, 2000
Based on the study of Upper Precambrian rocks penetrated by the Pavlovskii Posad parametric borehole in the 1770–4780 m interval, the Riphean succession is underlain by quartzose sandstones. The aulacogen within the Moscow Syneclise was covered by sediments accumulated during the intense chemical weathering of a peneplain. Above the 3550 m level, Upper
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Upper Riphean lithologic complexes of the world

International Geology Review, 1982
V. Ye. Khain, A. B. Ronov, K. B. Seslavinskiy   +2 more
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Riphaean | Riphean, adj.

2023
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Late Riphean microbial colonies adapted to desiccating environments

Doklady Earth Sciences, 2012
D. V. Grazhdankin, Yu. Yu. Goy, A. V. Maslov   +2 more
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