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Now showing items 16587-16606 of 37383
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(1988)In the Udachnaya kimberlite pipe in the Daldyn field, Yakutia, the authors discovered and studied in our Institute the new carbonate Na2Ca(CO3)2, called zemkorite and close in composition to the known carbonate nyerereite, ...
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(2001)Over the past 40 years, two universally accepted maxims of geology dealing with zeolite minerals have been shown to be incorrect: the first is that zeolites occur primarily as cavity fillings in basaltic igneous rocks, and ...
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(2000)A group of low-temperature peridotites with equigranular mosaic texture is distinguished among spinel peridotite xenoliths from Pliocene basanites of the Dzhilinda River. The mineral compositions of these peridotites are ...
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(2005)The mobility and solid-state speciation of zinc in a pseudogley soil (pH = 8.2–8.3) before and after contamination by land-disposition of a dredged sediment ([Zn] = 6600 mg kg−1) affected by smelter operations were studied ...
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(2004)The ‘Snowball Earth’ model of Hoffman et al. [Science 281 (1998) 1342] has stimulated renewed interest in the causes of glaciation in Earth history and the sedimentary, stratigraphic and geochemical response. The model ...
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(2004)(U-Th)/He chronometry of zircon has a wide range of potential applications including thermochronometry, provided the temperature sensitivity (e.g., closure temperature) of the system be accurately constrained. We have ...
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(2013)We present results of combined in situ U–Pb dating of detrital zircons and zircon Hf and whole-rock Nd isotopic compositions for high-grade clastic metasedimentary rocks of the Slyudyansky Complex in eastern Siberia. This ...
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(2004)The Aleksandrov Complex (AC) of metamorphic rocks is restricted to the long-lived Zyuratkul Fault on the western slope of the southem Urals, 2-3 km east of the known Taratash Complex. It makes up a NNE-trending tectonic ...
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(2003)Investigations of zircon geochronology of the Salda metamorphic complex are continued in case of metamorphic rocks in eastern slope of Middle Urals. Results of the investigations make it possible to compare analytic and ...
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(1998)The oxygen isotope ratios of Phanerozoic zircons from kimberlite pipes in the Kaapvaal Craton of southern Africa and the Siberian Platform vary from 4.7 to 5.9‰ VSMOW. High precision, accurate analyses by laser reveal ...
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(1989)Microprobe study of zircon parageneses in migmatites of different origin shows that the geochemical properties of zircon could be used to solve important petrological and geochemical problems. The standards employed for ...
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(2000)The interpretation of metamorphically induced U-Pb isotopic discordance requires a thorough understanding of zircon-fluid interactions. With this aim we have studied the behaviour of metamict and crystalline zircon phases ...
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(2002)With the aim to link zircon composition with paragenesis and thus metamorphic conditions, zircons from eclogite- and granulite-facies rocks were analysed for trace elements using LA-ICP-MS and SHRIMP ion microprobe. ...
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(Федеральное государственное бюджетное учреждение науки Институт земной коры Сибирского отделения Российской академии наук, 2017)
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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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(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 ...
Now showing items 16587-16606 of 37383