Геология России: Recent submissions

Now showing items 41-60 of 42946

A 3-D DENSITY-VELOCITY MODEL BETWEEN THE CRETAN SEA AND LIBYA

Makris J.; Yegorova T. (2006)

A 3-D density model for the Cretan and Libyan Seas and Crete was developed by gravity modelling constrained by five 2-D seismic lines. Velocity values of these cross-sections were used to obtain the initial densities using ...
THE CRYSTAL CHEMISTRY, STRUCTURE AND PROPERTIES OF A SYNTHETIC CARNOTITE-TYPE COMPOUND, BA2[UO2)2TI2O8]

Wallwork K.S.; James M.; Carter M.L. (2006)

The crystal structure of the carnotite-type compound Ba-2(UO2)(2)Ti2O8] has been determined by ab initio methods from synchrotron X-ray and neutron powder-diffraction data. We describe the first reported structure of a ...
MULTI-STAGE ORIGIN OF THE LOWER CRUST OF THE KARELIAN CRATON FROM 3.5 TO 1.7 GA BASED ON ISOTOPIC AGES OF KIMBERLITE-DERIVED MAFIC GRANULITE XENOLITHS

Peltonen P.; Mänttäri I.; Huhma H.; Whitehouse M.J. (2006)

Mafic garnet granulite xenoliths recovered from ∼500 to 600 Ma old eastern Finland kimberlites provide direct information on the petrology and physical properties of the lower cust below the Archean Karelian craton. Mineral ...
THE 2.40 GA RINGVASSøY MAFIC DYKES, WEST TROMS BASEMENT COMPLEX, NORWAY: THE CONCLUDING ACT OF EARLY PALAEOPROTEROZOIC CONTINENTAL BREAKUP

Kullerud K.; Skjerlie K.P.; Corfu F.; de la Rosa J.D. (2006)

A north to northwest trending mafic dyke swarm of gabbronoritic and gabbroic composition makes up a significant part of the Archean basement on the island of Ringvassøy in northern Norway. U-Pb geochronology of zircon and ...
CHARACTERISTICS AND ORIGIN OF NATURAL GASES IN THE KUQA DEPRESSION OF TARIM BASIN, NW CHINA

Zou Y.-R.; Wang Y.; Peng P.; Shuai Y.; Zhao C.; Zhao W. (2006)

Significant gas condensate as well as some black oils have been discovered in the Kuqa Depression of Tarim Basin, NW China. Dry gases with high δ13C values occur in the Kelasu structural belt, wet, isotopically light gases ...
ELEMENT MOBILITY IN MELTS DURING SUCCESSIVE INTRUSIONS OF CRUSTAL-DERIVED MAGMAS AND SN-W MINERALIZATION

Vigneresse J.-L. (2006)

Continental collisions are the place where granitic plutons result from the melting of crustal components. Granitic plutons are built up by successive input of magma with a variable composition and hence temperature and ...
FEEDBACK BETWEEN DEFORMATION AND MAGMATISM IN THE LLOYDS RIVER FAULT ZONE: AN EXAMPLE OF EPISODIC FAULT REACTIVATION IN AN ACCRETIONARY SETTING, NEWFOUNDLAND APPALACHIANS

Lissenberg J.C.; Van Staal C.R. (2006)

The Lloyds River Fault Zone is a 10-15 km wide amphibolite-grade shear zone that formed during the Ordovician Taconic Orogeny. It separates ophiolites and arc-back-arc complexes formed in lapetus from a periLaurentian ...
A NEW GENUS OF ICHTHYOSAUR FROM THE LOWER CRETACEOUS OF WESTERN CANADA

Maxwell E.E.; Caldwell M.W. (2006)

A new fauna of Lower Cretaceous (Albian) ichthyosaurs, which includes at least one new genus and species, was recovered from deposits of the Loon River Formation at Hay River, Northwest Territories, Canada. All Cretaceous ...
EXPERIMENTAL AND TEXTURE-DERIVED P-WAVE ANISOTROPY OF PRINCIPAL ROCKS FROM THE TRANSALP TRAVERSE: AN AID FOR THE INTERPRETATION OF SEISMIC FIELD DATA

Ullemeyer K.; Behrmann J.H.; Siegesmund S.; Rasolofosaon P.N.J. (2006)

A representative suite of deformed, metamorphic rocks from the TRANSALP reflection seismic traverse in the Eastern Alps was studied in the laboratory with respect to elastic properties and whole-rock texture. Compressional ...
SEISMIC LAMINATION AND ANISOTROPY OF THE LOWER CONTINENTAL CRUST

Meissner R.; Rabbel W.; Kern H. (2006)

Seismic lamination in the lower crust associated with marked anisotropy has been observed at various locations. Three of these locations were investigated by specially designed experiments in the near vertical and in the ...
MINERAL-INDUCED FORMATION OF REACTIVE OXYGEN SPECIES

Schoonen M.A.A.; Cohn C.A.; Laffers R.; Roemer E.; Simon S.R.; O'Riordan T. (2006)

This chapter explores the role of minerals in the formation of reactive oxygen species. Five different mechanisms by which minerals may promote the formation and transformation of ROS species are explored (Fig. 1). These ...
A CONTINUOUS 5300-YR HOLOCENE CRYPTOTEPHROSTRATIGRAPHIC RECORD FROM NORTHERN NEW ZEALAND AND IMPLICATIONS FOR TEPHROCHRONOLOGY AND VOLCANIC HAZARD ASSESSMENT

Gehrels M.J.; Hazell Z.J.; Newnham R.M.; Lowe D.J. (2006)

A continuous ~ 5280 calendar (cal.) yr long cryptotephrostratigraphic record of a peat core from northern New Zealand demonstrates that cryptotephra studies can enhance conventional tephra records by extending the known ...
FNEW DATA ON TYPE-LOCALITY SOROSITE: COMPOSITIONAL VARIATIONS, ZONING, AND A REVISED FORMULA

Barkov A.Y.; Martin R.F.; Shi L. (2006)

We report new results of multiple EMP analyses of sorosite from the Baimka Au-PGE placer deposit, western Chukotka, northeastern Russia. It occurs as (1) relatively large (0.24).4 mm) euhedral, cryptically zoned hexagonal ...
A GOBICONODONTID (MAMMALIA, EUTRICONODONTA) FROM THE EARLY CRETACEOUS (BARREMIAN) WESSEX FORMATION OF THE ISLE OF WIGHT, SOUTHERN BRITAIN

Sweetman S.C. (2006)

Bulk screening of Early Cretaceous (Barremian) strata of the Wessex Formation, exposed in sections on the south-west and south-east coasts of the Isle of Wight, southern England, has resulted in the recovery of mammal ...
BARBERTON (SOUTH AFRICA) TTG MAGMAS: GEOCHEMICAL AND EXPERIMENTAL CONSTRAINTS ON SOURCE-ROCK PETROLOGY, PRESSURE OF FORMATION AND TECTONIC SETTING

Clemens J.D.; Yearron L.M.; Stevens G. (2006)

In the southern area of the Barberton Mountain Land, TTG magmas were produced during two distinct, major, magmatic events at ca. 3.44 and 3.23 Ga. Here, as in many Archaean terranes, tonalite-trondhjemite-granodiorite (TTG) ...
CHRONOSTRATIGRAPHY OF LATE NEOGENE SEDIMENTS IN THE SOUTHERN NORTH SEA BASIN AND PALEOENVIRONMENTAL INTERPRETATIONS

Kuhlmann G.; Langereis C.; Meulenkamp J.; Wong T.; Munsterman D.; Jan van Leeuwen R.; Verreussel R. (2006)

A chronostratigraphic framework has been established for Upper Neogene sediments from the northern Netherlands offshore sector, southern North Sea. Data of dinoflagellate cysts, pollen and foraminifers from eight boreholes ...
SIPHUNCULAR STRUCTURE IN SOME FOSSIL COLEOIDS AND RECENT SPIRULA

Mutvei H.; Donovan D.T. (2006)

In Jurassic Phragmoteuthis huxleyi Donovan (Order Phragmoteuthida) the siphuncular wall shows unique structural and morphological features. The septal neck is short, about one-eighth of chamber length, but the connecting ...
EVOLUTION OF MANTLE STRUCTURE BENEATH THE NORTHWEST PACIFIC: EVIDENCE FROM SEISMIC TOMOGRAPHY AND PALEOGEOGRAPHIC RECONSTRUCTIONS

Miller M.S.; Kennett B.L.N. (2006)

Plate motions and subducting slab morphology are intricately connected, and through the integration of seismicity, tomographic images, and relative plate motions, the evolution of mantle structure can be interpreted. ...
CHARACTERIZATION OF A FRACTURED GRANITIC PLUTON: P- AND S-WAVES' SEISMIC TOMOGRAPHY AND UNCERTAINTY ANALYSIS

Martí D.; Carbonell R.; Pérez-Estaún A.; Escuder-Viruete J. (2006)

A detailed characterization of the physical properties of a granitic pluton, including a three dimensional reconstruction of the fractures network and its surrounding are obtained by high resolution seismic tomography of ...
LUTETIACADER, A PUZZLING NEW GENUS OF CANTACADERID LACE BUGS (HETEROPTERA: TINGIDAE) FROM THE MIDDLE EOCENE MESSEL MAAR, GERMANY

Wappler T. (2006)

A new genus of cantacaderid lace bugs, Lutetiacader gen. et sp. nov., is described from the lower Middle Eocene of Messel Quarry, Germany. It clearly belongs to the cantacaderid lineage of Tingidae, and is the second known ...

Now showing items 41-60 of 42946

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