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Now showing items 41-60 of 110
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(2019)Within the Chu-Kendyktas Precambrian terrane located in Southern Kazakhstan (in the western part of the Central Asian Orogenic Belt), medium- and high-grade metamorphic formations have been identified and attributed to the ...
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(2003)Geochemical, petrographic, mineralogical and geochronological study of mafic dikes in the Sharyzhalgai massif of the south Siberian craton has revealed the presence of three distinct generations of dikes. The youngest and ...
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(2004)The eastern margin of the East European Craton (EEC) has a long lasting geological record of Precambrian age. Archaean and Proterozoic strata are exposed in the western fold-and-thrust belt of the Uralides and are known ...
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(2003)The paper reports data on the petrology and geochemistry of granitoids of the Glushikha Complex in the Transangara area of the Yenisei Range and presents U-Pb, Sm-Nd, Rb-Sr, and Ar-Ar isotopic geochemical data on these ...
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(2002)Thermal contraction cracking of permafrost produced sand-wedge polygons at sea level on the paleo-equator during late Neoproterozoic glacial episodes. These sand wedges have been used as evidence for high (=<54°) paleo-obliquity ...
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(2003)The paper reviews and integrates the recent geological and geochronological data, which allow us to recognize three stages of the evolution of the Paleo-Asian Ocean.The opening of the Paleo-Asian Ocean at 970-850 Ma is ...
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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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(2015)The Gorny Altai terrane (GA) is a key area in understanding the crustal evolution of the Central Asian Orogenic Belt (CAOB). This paper reports U–Pb and Hf-isotope data for detrital zircons from Cambrian to early Devonian ...
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(2000)The Proterozoic connection between northeastern Siberia and western Laurentia that we proposed in 1978 is strongly supported by several new lines of evidence. New age data and refined structural trends in predrift basement ...
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(2004)The southern Altaids present a unidirectional section from Mongolia to China through an accretionary orogen that youngs progressively from Neoproterozoic in the north to Permian in the south. The orogen formed by forearc ...
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(2001)Diverse assemblages of silicified microfossils have been detected in lenses of black chert within peritidal carbonates of the Neoproterozoic (Upper Riphean) Shorikha and Burovaya formations, Turukhansk Uplift, northeastern ...
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(2004)Several recent publications demonstrate that the marginal zone of the Yenisei Ridge incorporates a belt of Neoproterozoic island-arc and ophiolitic rock complexes thrust over sedimentary-metamorphic sequences of the passive ...
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(Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук, 2017)
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(2001)Results of the detailed petrological study (including mineralogical, petrological, and geochemical characterization and isotopic dating) of Neoproterozoic dike swarms in the southern flank of the Siberian craton are employed ...
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(2005)The microfossils examined in acritarchs from the Neoproterozoic rocks in the southern margin of the Siberian craton have been ecobiologically interpreted. The studied sequences are of particular interest as they represent ...
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(2001)Prominent maxima in black shale abundance and in black shale/total shale ratio occur at 2.0-1.7 Ga, with less prominent peaks in the Late Neoproterozoic (800-600 Ma) and in the Late Archean (2.7-2.5 Ga). Peaks in chemical ...
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(2002)Analyses of REE were conducted on phosphatic concretions and various types of associated organic matter in eight, key latest Neoproterozoic–earliest Cambrian, inner- to outer-shelf, marine phosphatic successions that are ...
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(1997)The Hecla Hoek Complex, a ∼ 18-km-thick succession in the Svalbard Caledonian Eastern Terrane, has been interpreted to be a more or less continuous volcano-sedimentary sequence. Amphibolite-facies rocks in the lower parts ...
Now showing items 41-60 of 110