Results 41 to 50 of about 666 (163)

Unique titanium Deposits of Timan: genesis and age issues

Записки Горного института, 2022
The article critically analysesthe hypotheses about the formation, age, and sources of material of large Timan titanium deposits, which were previously considered ancient buried placers formed along the weathering crusts of the Riphean shales. We discuss
Aleksandr B. Makeyev, Nataliya I. Bryanchaninova, Anna O. Krasotkina   +2 more
doaj   +1 more source

First High‐Precision U–Pb CA–ID–TIMS Age of the Chuanlinggou Formation, North China Craton: Implications for Global Correlations of Black Shales and the Statherian/Calymmian Boundary

Geophysical Research Letters, Volume 51, Issue 18, 28 September 2024.
Abstract The Chuanlinggou Formation in the northern North China preserves the world's earliest multicellular eukaryote microfossils. Here we present a high‐precision zircon U–Pb CA–ID–TIMS age of 1,641.7 ± 1.2 Ma for a tuff layer within the black shales of the Chuanlinggou Formation.
Shuan‐Hong Zhang, Sandra L. Kamo, Richard E. Ernst, Guo‐Hui Hu, Qi‐Qi Zhang, Hafida El Bilali, Yue Zhao   +6 more
wiley   +1 more source

Composition and formation conditions of the Upper Riphean terrigenous rocks (Dzhezhimparma Uplift, Southern Timan)

Известия высших учебных заведений: Геология и разведка, 2017
The results of the study of the composition of the Upper Riphean terrigenous rocks of Dzhezhimparma Uplift at Southern Timan have been presented. On the basis of the lithological, geochemical and mineralogical data, the sedimentary material has been ...
N. Yu. Nikulova
doaj   +1 more source

Provenance reconstructions. Article 1. Mineralogical and petrographic approaches and methods

Литосфера, 2020
Research subject. This is the first in the series of four articles, which aims to review existing provenance reconstruction tools.Methods and materials.
A. V. Maslov, O. Yu. Melnichuk, G. A. Mizens, Yu. V. Titov   +3 more
doaj   +1 more source

Riphean Depocenters and Origin of Oil Deposits of the Romashkinskoye and Yaregskoye Fields

Georesursy
Interpretation of geological and geophysical data indicates an important role of Riphean strata in the formation of large and unique oil accumulations, which include the Romashkinskoye and Yaregskoye fields.
K. O. Sobornov
doaj   +1 more source

Mineral-geochemical features and type of organic matter of the lower-riphean deposits of the eastern-askinskaya area of the republic of Bashkortostan [PDF]

, 2018
© SGEM2018. In the East of the Russian plate oil-gas occurrences in Bashkortostan, Perm region and Udmurtia were revealed in the Vendian-Riphean sedimentary deposits. Industrial oil inflows have been obtained in a number of areas.

core  

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Fallick, A.E., Robert M. Ellam, Anthony E. Fallick, Graham, C.M., Ellam, R.M., Christopher W. Thomas, Thomas, C.W., Colin M. Graham   +7 more
core   +1 more source

Mineral-geochemical features and type of organic matter of the lower-riphean deposits of the eastern-askinskaya area of the republic of Bashkortostan

, 2020
© SGEM2018. In the East of the Russian plate oil-gas occurrences in Bashkortostan, Perm region and Udmurtia were revealed in the Vendian-Riphean sedimentary deposits. Industrial oil inflows have been obtained in a number of areas.

core  

Sulfide mineralization, native gold and its geochemical connections in the Riphean deposits of the Avzyan ore-bearing region (the Southern Urals)

Литосфера, 2018
In the Avzyan ore-bearing region the sulfides from the low-sulfide gold-quartz deposits (Ulyuk-Bar, Kurgashly) are characterized by higher concentrations of As, Co, Ni, Cu, Pb in comparison with sulfides from sediments outside of ore-bearing zones.
Sergei V. Michurin, Aisylu A. Sharipova, Мikhail Т. Krupenin, Dmitrii A. Zamyatin, Аlsu М. Musina, Vladimir А. Popov   +5 more
doaj   +1 more source

The age and origin of volcanics in the Riphean section of the Siberian craton (western Baikal area)

, 2008
In the western Baikal area, the structural position, composition, and age of volcanic rocks in the section of the Riphean margin of the Siberian craton were studied. The age of these rocks, earlier assigned to the Khotskaya Formation, is estimated at 274±
Donskaya, T.V., D.P. Gladkochub, T.V. Donskaya, Stanevich, M., Gladkochub, D.P., De Waele, B., De Waele, Bert, S.A. Pisarevsky, B. De Waele, Pisarevsky, Sergei, A.M. Mazukabzov, Pisarevsky, S., Gladkochub, D., Stanevich, A., Mazukabzov, A.M., Mazukabzov, A., Donskaya, T., A.M. Stanevich   +17 more
core   +1 more source