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Now showing items 21-40 of 219
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(2001)Thick, unmetamorphosed successions of siliciclastic and carbonate rocks in eastern and western Siberia preserve a record of Middle Riphean to Early Upper Riphean sedimentary environments and geochemistry. Consistent with ...
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(2001)Geology and gold mineralisation of the Sutara and Priamurye auriferous districts in the Jewish Autonomous Region are briefly reviewed in the paper. Placers have being mined for more than a hundred years in these districts ...
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(2003)The 3 He/ 4 He = R ratio was studied in underground fluids from 104 sites from the Baikal Rift Zone (BRZ) and adjacent areas in Russia and Mongolia. The R -values vary in a wide range from R=0.01R A (crustal radiogenic He) ...
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(1999)The paper gives the definition of the North-Asian craton as a geological structure. The evolution of conception and views of its structure and boundaries is considered, and a brief overview of its geologic history in terms ...
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(1989)That pre-Paleozoic volcanic rocks occur widely in the Polar Urals has been known for a long time. High-magnesium andesites and boninites of the Polar Urals resemble in their geological position, as well as their petrography ...
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(2005)Дискуссия о возрасте нефелиновых сиенитов Бердяушского массива расположенного на западном склоне Южного Урала и прорывающего стратотипические рифейские образования Башкирского антиклинория имеет длительную историю. Новые ...
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(1999)New sites of mineralized microfossils, seven in cherts and one in phosphorite of the Upper Riphean Valyukhta Formation-of the Baikal-Patom Highland, are discovered at the Alekan River (the Malaya Chuya River basin). The ...
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(1983)Linear extensional rift and rift-like structures have been generated many times during various periods of the Earth's history since early times. These structures have varied with time, however, in scale, morphology, ...
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(1987)The melanocratic rock association considered represents the basement of the outer part of the Northwest Pacific paleo-oceanic fringe. It is confined to the zone where oceanic crustal complexes taper among crystalline rock ...
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(1999)The specific features of the Central-Asian orogenic belt (CAOB) and marginal structures of the North-Asian craton are considered on the basis of analysis of lithospheric-plate tectonics and terrain analysis. The general ...
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(2004)Microphytological remains from Riphean deposits of the Mezen syneclise (Leshukon depression) have been Eudied in 115 core samples characterizing in detail a sedimentary section penetrated by deep borehole Srednyaya Nyafta ...
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(2001)Silicided microfossils from the Middle Riphean Svetlyi Formation of the Riphean hypostratotype in the Uchur-Maya region of southeastern Siberia are described for the first time. Cherts are discovered to enclose only simple ...
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(2002)Organic-walled microfossils from the Riphean hypostratotype of Siberia (the Uchur-Maya region), which represent the Early Riphean Uchur (Omakhta) and Late Riphean Ui (Kandyk and Ust'-Kirba) microbiotas, are considered. The ...
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(2003)New materials studied (over 200 samples) and published data critically analyzed are used to specify composition of organic-walled microfossils and to elucidate their vertical and lateral distribution in the Upper Riphean ...
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(1994)Silicified shallow-water marine carbonate deposits of the Proterozoic Debengda Formation (the Olenek Uplift, northeastern Siberia) contain well preserved microfossils. One or two distinct assemblages consists only of ...
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(2000)The paper considers the structure, lithology, and facies characteristics of the Yurmatin and Serafimovka groups of the Bashkir meganticlinorium and Volga–Urals region. The analyzed distribution schemes of facies associations ...
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(2005)Приведена характеристика своеобразных верхнепротерозойских образований - извилистых трещинок в обогащенных органическим веществом карбонатных породах. Трещинки, выполненные преимущественно кальцитом, образуют систему светлых ...
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(2011)На примере карбонатных отложений сухотунгусинской свиты рифея Туруханского поднятия Сибири рассмотрен новый механизм формирования проблематичных образований текстур Molar tooth (МТ), которые, наряду со строматолитами, ...
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(2004)New paleontological findings, analysis of section structure, and literature data on the Neoproterozoic stratigraphy of the Altai-Sayan Folded Area, ASFA, provide support to the recognition of three heterochronous polyfacies ...
Now showing items 21-40 of 219