Browsing ELibrary by Subject "Jurassic"
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Browsing ELibrary by Subject "Jurassic"
Now showing items 21-40 of 129
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(1990)Determining the maximum temperature to which sedimentary rocks were exposed is of great importance, especially in petroleum geology, and also is one of the most difficult of tasks in that science. A simple method of ...
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(2004)In an early attempt to incorporate infraspecific, varietal categories into conventional, morphodescriptive Linnaean taxonomy, Quenstedt in 1845 introduced an idiosyncratic trinominal nomenclature that has bedevilled ammonite ...
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(2002)Thermochemolysis experiments with tetramethylammonium hydroxide (TMAH), on three Late Jurassic kerogens with contrasting features, confirmed the major role of encapsulation into aliphatic structures for the survival of ...
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(2001)We describe a nearly complete mammalian femur from the Middle Jurassic (upper Bathonian) from Peski quarry, situated some 100 km south east of Moscow, central Russia. It is similar to the femora of Morganucodontidae in ...
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(1989)The basanite explosion pipes in the area of the Kop'yevo uplift in the Chulym-Yenisey basin (CYB) are widely known because they contain xenoliths of peridotite, pyroxenite and megacrysts of other minerals and others). ...
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(1990)Investigations done in the northern Caspian Sea more than 20 years ago have defined the general structure of the Jurassic-Cretaceous and Cenozoic deposits, but information on older complexes was lacking until recently. In ...
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(2004)Pliensbachian coaliferous sequences were formed along the southern margin of the Stavropol Uplift in various paleogeographic environments. Therefore, peat bogs are developed in various landscape zones. In the southern Kuban ...
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GEOCHEMICAL FACIES ANALYSIS OF FINE-GRAINED SILICICLASTICS USING TH/U, ZR/RB AND (ZR+RB)/SR RATIOS (2001)Abundance of the trace elements Zr, Rb, Sr, Th and U may provide insight into the sedimentological origin of fine-grained siliciclastic sediments, provided that the units are derived from similar source areas, as demonstrated ...
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(2004)Early Mesozoic geological events played an important role in the structural evolution of Eastern and Central Asia. They involved collision between Siberia and Sino-Korean continents. This was accompanied by the closure of ...
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(2002)Dismembered ophiolites occur in the Dinaride Ophiolite Zone (DOZ) that is related to the open-ocean Tethyan realm, whereas highly dismembered ophiolites occur in the Vardar Zone (VZ) related to a back-arc basin. The ...
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(2001)It is proposed that there are three types of gold deposits in Eastern and Central Transbaikalia (Trans-Baikal province), namely: (i) high-sulphide intrusion-related deposits with some signs of porphyry deposits, (ii) ...
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(1989)Analysis of the evolution of Phanerozoic stratigraphic complexes of the western margin of the East European craton (EEC) and the Central European Platform (CEP) shows that their formation depended on the corresponding ...
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(1999)A new genus Gobicar with a single species, G. ponomarenkoi from the Shar-Teg locality is described. A combination of its characters indicates that it is the most primitive member of the Eccoptarthridae.
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(1999)The Rb-87/Sr-86 and Sr-87/Sr-86 ratios of Laptev Sea sediments, of Arctic Ocean sediments and of suspended particulate matter (SPM) from Siberian rivers (Lena and Khatanga) form 'pseudo-isochrons' due to grain-size separation ...
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(2002)Three horizons of phthanites and black carbonaceous mudstones are distinguished in the key section of Triassic and Jurassic cherty deposits of the Gorbusha Sequence near the Settlement of Dal'negorsk (Sikhote Alin). The ...
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(2001)Horst-accretionary systems (HAS) extended to the northeast and alternating with rift-grabens (RG) were established within the bounds of the southeastern margin of Asia. The synchronous formation of these positive and ...
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(2003)A detailed record of sea surface temperatures in the Northern Hemisphere based on migration of marine invertebrate fauna (ammonites) and isotopic thermometry (δ18O values of shark tooth enamel) indicates a severe cooling ...
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(1991)A Bathonian volcanogenic unit in northern Karabakh was examined. It was established that it belongs to a tholeiitic series of the ferruginous moderately highly titaniferous type. Two complexes were identified: an early ...
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(1988)We analyzed asphaltenes of crude oils and bitumens in dispersed organic matter from various regions of the West Siberian block and the Siberian craton. The West Siberian crude oil samples were collected from Jurassic and ...
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(2001)Isotopic dating showed that rhyolites of the Kushmurun graben are divisible into two groups different in age. One group is close to the Induan-Olenekian boundary in its chronostratigraphic position and has K-Ar and Rb-Sr ...
Now showing items 21-40 of 129