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Геология России: Recent submissions
Now showing items 1661-1680 of 43490
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THE ISOTOPIC COMPOSITION OF ZIRCON AND GARNET: A RECORD OF THE METAMORPHIC HISTORY OF NAXOS, GREECE (2006)Growth of zircon with respect to that of garnet has been studied using a combination of petrography, U-Pb dating and oxygen isotope analysis. The aim is to document the mechanism and pressure-temperature conditions of ...
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(2006)The Chinese Continental Scientific Drilling (CCSD) main drill hole (0-3000 m) in Donghai, southern Sulu orogen, consists of eclogite, paragneiss, orthogneiss, schist and garnet peridotite. Detailed investigations of Raman, ...
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(2006)Two apparently distinct, sub-parallel, paleo-subduction zones can be recognized along the northern margin of the Tibetan Plateau: the North Qilian Suture Zone (oceanic-type) with ophiolitic mélanges and high-pressure ...
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(2006)The San Miguel de Allende graben, Guanajuato, Mexico, contains numerous rhyolitic volcanic ash beds. Electron microprobe and x-ray fluorescence analyses of glass shards from 14 localities, combined with mineralogic, ...
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(2006)Reconstructions of Phanerozoic CO2 levels have generally relied on geochemical modeling or proxy data. Because the uncertainty inherent in such reconstructions is large enough to be climatically significant, inverse climate ...
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(2006)Geological mapping and geochemical analyses combined with 40K-40Ar ages for lavas from the Late Miocene to Quaternary La Purísima volcanic field (Baja California Sur) provide evidence for five volcanic events. These, in ...
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(2006)Snow was sampled across a heterogeneous landscape within 40 strata defined by time, elevation, vegetation, and solar radiation (i.e. terrain). The objective was to efficiently develop accurate estimates of the mean snowpack ...
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(2006)Three suites of granitic rocks are present in the early Paleozoic North Qaidam ultrahigh-pressure (UHP) metamorphic belt, which has eclogite ages of 466-495 Ma. The first suite consists of quartz monzodiorite + granodiorite ...
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(2006)It has long been accepted that occurrences of a known signal are most effectively detected by cross-correlating the incoming data stream with a waveform template. Such matched signal detectors have received very little ...
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(2006)The Caribou Creek volcanic field lies along the continent-side edge of forearc basin rocks in south-central Alaska and consists of over 1000 m of shallow-dipping basalt and andesite lavas with minor mafic pyroclastic ...
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(2006)The Rubian magnesite deposit (West Asturian-Leonese Zone, Iberian Variscan belt) is hosted by a 100-m-thick folded and metamorphosed Lower Cambrian carbonate/siliciclastic metasedimentary sequence - the Cándana Limestone ...
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(2006)It has long been recognized that the trend of marine diversity from the Carboniferous to the Triassic includes an approximately 100-myr-long stable biodiversity stage ranging from the Late Carboniferous to the late Middle ...
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(2006)Unusual compositions of some oceanic basalts have been attributed to their sources containing continental lithosphere detached during the breakup of Gondwana. However, the processes of how such continental lithospheric ...
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(2006)The first fossil snakes from Venezuela are described from three different Formations: Colombophis cf. C. portai and Boinae indet. from the Middle Miocene Socorro Formation, Boinae indet. from the Late Miocene Urumaco ...
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(2006)In the present study from the southern margin of the Central Indian Tectonic Zone, it is demonstrated how the metamorphic P-T path of ultrahigh-temperature granulite terranes can be reconstructed using the metamorphic ...
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(2006)The Karakorum Range comprises a crustal section of marbles and metapelites providing an opportunity to study the extent of high-temperature metamorphic reequilibration in an active orogen. Metamorphism culminated during ...
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(2006)A new method using ammonia solutions in pre-evacuated quartz bottles has been experimented for volcanic gas sampling and analysing. Various tests (reproducibility, variability and comparison with known methods such as NaOH ...
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(2006)The use of magnetic surveys for archaeological prospecting is a well-established and versatile technique, and a wide range of data processing routines are often applied to further enhance acquired data or derive source ...
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(2006)The Elchuru alkaline complex in the Prakasam igneous province represents one occurrence of several alkaline bodies within the craton-Eastern Ghats Belt contact zone in Peninsular India. Nepheline syenites and associated ...
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(2006)A study of the 933±32-Ma-old Bolangir massif-type anorthosite complex (Eastern Ghats Province, India) yielded strong evidence for anorthosite emplacement during regional shortening, and thereby new insights in massif-type ...
Now showing items 1661-1680 of 43490