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Now showing items 81-100 of 228
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(1989)We investigated a geologically complex deposit in the Eastern Sayan region. It is confined to a steeply dipping (80°) shale-carbonate member that is inferred to be of Riphaean age and is sandwiched between Paleozoic granite ...
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(1999)It is often argued that the δ18O value of oceanic water was maintained close to 0%% for hundreds of millions of years, as a consequence of oxygen isotope exchange between oceanic crust and seawater. However, for several ...
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(2000)Clay-mineral, heavy-mineral, and elemental distributions in sediments from the Arctic Ocean and the adjacent Laptev and Kara seas can be attributed to the geology of the hinterland and the transport of terrigenous material ...
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(1998)The Urals structure, as a whole, is the result of the post-Permian sublatitudinal extension of the region. It is characterized by alternating submeridional zones: synform zones made up of nonmetamorphosed volcanogenic and ...
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(2002)The morphogenesis and homologies of the major skeletal structures of crinoids and similar Early Paleozoic echinoderms are analyzed on the basis of comparative morphological analysis. The study of symmetry and asymmetry in ...
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(2004)The qualitative and quantitative analysis of the holomorphic folding morphology in the central segment of the South Tien Shan revealed its heterogeneity in the Paleozoic rock sequences. Against the background of the gradual ...
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(2000)The structure of the Central Pamirs is defined by piled-up large tectonic nappes, characterized by a quite definite and rather sustained sequence of stratification for the whole zone. Autochthone is represented by Early ...
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(1997)Приводятся первые данные по минералогической и температурной зональности сульфидных «труб» палеозойского «черного курильщика». Выделено четыре зоны: наружная - низкотемпературная мельниковит-пирит-марказитовая, внутренняя ...
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(1998)Analyses of the Nd isotopic composition and REE distribution in biogenic apatite (organophosphatic brachiopods and conodont elements) from the Cambrian and Ordovician sequences of the Baltic plate give new insights into ...
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(2004)Neoproterozoic tectonics is dominated by the amalgamation of the supercontinent Rodinia at ca. 1.0Ga, its breakup at ca. 0.75Ga, and the collision between East and West Gondwana between 0.6 and 0.5Ga. The principal stages ...
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(2002)We present a synthesis and a new account of the geological and tectonic history of the terranes of the Chinese Paleozoic Altai orogen together with new, single zircon ages for granitic and rhyodacitic rocks. A central ...
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(1990)There is little information about pre-Late Paleozoic volcanism in Siberia because the corresponding volcanic systems were largely eroded during the Mesozoic. However, by studying the few volcanic bodies now known and ...
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(1989)Much of the Lok crystalline spur of the Transcaucasus median block consists of Paleozoic granite. These metamorphic rocks constitute mainly the western periphery of the spur, along the right-bank tributaries of the Moshevani ...
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(1989)Existing theories on the geologic structure of Khan Tengri, a massif that is extremely difficult to reach and has the largest glaciers (North and South Inyl'chek) and highest peaks in the Tien Shan, are based on data ...
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(1999)New Rb-Sr isotope data on two stages of the Late Paleozoic granitoid magmatism are presented. These stages widely occurred on the territory of Southern Siberia, in particular, in Transbaikalia. They occurred within the ...
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(1988)Oil flows, sometimes fairly intensive, were observed in many exploratory wells drilled in middle Paleozoic carbonates of the Paleozoic Nyurol'skiy sedimentary basin, located in the southwestern part of the Tomsk region and ...
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(2001)The compositional characteristics of mantle xenoliths of the grospydite and coesite depth subfacies from the Internatsional'naya, Aikhal, Udachnaya-West, Udachnaya-East, Yubileinaya, Mir, Zarnitsa, Komsomol'skaya, Sytykanskaya, ...
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(1997)The crustal structure and lithospheric flexure of the Baikal Rift Zone, Siberia, are examined by means of gravity modelling. We model the Bouguer Anomaly (BA) along five 1200 km long gravity profiles. We first evidence ...
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(2000)Phyllonite and metaquartzite clasts occur in early Pliocene or possibly Miocene sediment at the base of the University of Wisconsin Arctic Ocean core Fl-380. Single-crystal 40Ar/39Ar laserprobe ages derived from feldspars ...
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(2001)Overpressured zones in the Precaspian Basin occur at depths below 4000 m. The most extensive zone is in the subsalt reservoirs throughout the basin. In spite of the extended literature database on overpressure phenomena, ...
Now showing items 81-100 of 228