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Now showing items 16872-16891 of 39004
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(2004)Oxygen isotope analysis and U-Pb dating were carried out on zircons from granite, granitic gneiss and eclogite in the Dabie-Sulu orogenic belt of east-central China. The results show a wide variation in zircon δ18O values ...
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(2014)The Central Asian Orogenic Belt (CAOB) consists of many tectonic terranes with distinct origin and complicated evolutionary history. Understanding of individual block is crucial for the reconstruction of the geodynamic ...
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(2008)Gneissic rocks in the Chinese Altai Mountains have been interpreted as either Paleozoic metasedimentary rocks or Precambrian basement. This study reports geochemical and geochronological data for banded paragneisses and ...
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(2003)Isotopic anomalies in Mo and Zr have recently been reported for bulk chondrites and iron meteorites and have been interpreted in terms of a primordial nucleosynthetic heterogeneity in the solar nebula. We report precise ...
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(1998)Zirkelite, a cubic mineral of general formula (Ti,Ca,Zr)O 2−x occurs as an accessory mineral in phoscorites, carbonatites and associated rocks in the Sebl'yavr complex. After pyrochlore, it is the main mineral concentrating ...
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(2005)Copper and Zn isotope ratios of well-characterized samples from three ore facies in the Devonian Alexandrinka volcanic-hosted massive sulphide (VHMS) deposit, southern Urals, were measured using multi collector ICP-MS ...
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(2005)High-precision Zn isotopic variations are reported for carbonaceous chondrites (CC), equilibrated (EOC) and unequilibrated (UOC) ordinary chondrites, iron meteorites from the IAB-IIICD (nonmagmatic) and IIIA (magmatic) ...
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(1998)The solubility of zincite in mildly to strongly acidic aqueous solutions, according to the reaction ZnO + 2H+ # Zn2+ + H2O, has been measured at ionic strengths of 0.03-1.0 (stoichiometric molal basis) from 50 to 290°C at ...
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(2001)Our detailed petrographic study of the Early Proterozoic metapelites of the Tim-Yastrebovskaya structure resulted in distinguishing the following four metamorphic zones: garnet-chlorite, staurolite-andalusite. staurolite ...
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(2001)A scheme of small mammal (vole) zones is proposed for the Quaternary of Eastern Europe. The zonation is based on the evolutionary appearance of new forms in the Borsodia-Prolagurus-Lagurus, Mimomys-Arvicola, and ...
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(Федеральное государственное автономное образовательное учреждение высшего образования «Дальневосточный федеральный университет», 2015)Deformations and damages around workings and drill holes are usually zonal. They appear when strain in masses at great depth become recurrent and macro defects result in the areas, where principle compression tangential ...
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(2001)The article highlights the mineral zonality at the Grachevskoe, Kosachinskoe, and Shokpak-Kamyshovskoe uranium ore fields (Northern Kazakhstan) localized in low-temperature sodic metasomatites. The setting of these fields ...
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(1993)The Upper Cretaceous oceanic and island-arc terranes of Northeastern Kamchatka (Russia) are intruded by numerous ultramafic and mafic to intermediate plutons. Ultramafic plutons north of Epilchik Lake show a concentric ...
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(1992)The accumulation of information about the stratigraphic ranges and areal distribution of various groups of fauna and flora has made it possible to pass onto the zonal differentiation of all the systems of the Phanerozoic ...
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(2003)In the mid-Middle Miocene (Konkian Phase), the Eastern Paratethys reestablished a wide connection with the World Ocean. This resulted in the migration of the marine polyhaline molluskan fauna from the Mediterranean. The ...
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(PANGAEA, 2003-07-12)
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(2000)The presence of Zr isotope anomalies in the early solar system is demonstrated with the identification of 92Zr excesses and 96Zr deficits in several chondrites and the CAI Allende inclusions. The isotopic composition of ...
Now showing items 16872-16891 of 39004