ELibrary: Recent submissions

Now showing items 41-60 of 24508

ZIRCON CRYSTAL MORPHOLOGY, TRACE ELEMENT SIGNATURES AND HF ISOTOPE COMPOSITION AS A TOOL FOR OETROGENETIC MODELLING: EXAMPLES FROM EASTERN AUSTRALIAN GRANITOIDS

Belousova E.A.; Griffin W.L.; O'Reilly S.Y. (2006)

In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U-Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...
PETROGENESIS OF LATE JURASSIC QIANLISHAN GRANITES AND MAFIC DYKES, SOUTHEAST CHINA: IMPLICATIONS FOR A BACK-ARC EXTENSION SETTING

Jiang Y.-H.; Jiang S.-Y.; Zhao K.-D.; Ling H.-F. (2006)

A late Mesozoic belt of volcanic-intrusive complexes occurs in Southeast China. The Qianlishan granites are distributed in the northwest of the belt. The pluton is composed of porphyritic biotite granite (153 Ma) and ...
EARLY MESOZOIC, POST-COLLISIONAL SHOSHONITIC LAMPROPHYRES ALONG THE WESTERN MARGIN OF THE SOUTH CHINA OROGEN: GEOCHEMICAL CHARACTERISTICS AND TECTONIC IMPLICATIONS

Liang X.-Q.; Fan W.-M.; Wang Y.-J.; Li X.-H. (2006)

The Anhua-Xupu shoshonitic lamprophyres, emplaced along the western margin of the South China orogen (Cathaysian block), formed about 207 Ma. They are characterized by high K2O/Na2O ratios (0.84-1.72), high K2O + Na2O ...
GRANITIC ROCKS OF THE RIO DOS BUGRES MINE: HOST ROCKS OF FLUORITE DEPOSITS IN SOUTHERNMOST BRAZIL

Flores J.A.; Nardi L.V.S.; Formoso M.L.L.; Ferreira A.C.; Meunier A.; Pascal M.L.; Fonteilles M. (2006)

Most fluorite deposits in southernmost Brazil are hosted by Neoproterozoic granitic associations. Fluorite deposits are, nevertheless, much younger than granitic magmatism, and the only probable role of granitic rocks in ...
THE ENIGMA OF EARLY MIOCENE BISERIAL PLANKTIC FORAMINIFER

Smart C.W.; Thomas E. (2006)

Small biserial foraminifera were abundant in the early Miocene (ca. 18.9-17.2 Ma) in the eastern Atlantic and western Indian Oceans, but absent in the western equatorial Atlantic Ocean, Weddell Sea, eastern Indian Ocean, ...
CRYSTALLISATION OF MELA-AILLIKITES OF THE NARSAQ REGION, GARDAR ALKALINE PROVINCE, SOUTH GREENLAND AND RELATIONSHIPS TO OTHER AILLIKITIC-CARBONATITIC ASSOCIATIONS IN THE PROVINCE

Upton B.G.J.; Craven J.A.; Kirstein L.A. (2006)

Aillikites (carbonated, melilite-free ultramafic lamprophyres grading to carbonatites) are minor components of the Gardar alkaline igneous province. They occur principally as minor intrusions and as clasts in diatremes, ...
THE METHODOLOGY OF QUANTIFICATION OF VOLCANIC EXPLOSIONS FROM BROAD-BAND SEISMIC SIGNALS AND ITS APPLICATION TO THE 2004-2005 EXPLOSIONS AT VOLCÁN DE COLIMA, MEXICO

Zobin V.M.; Navarro C.; Reyes-Dávila G.; Orozco J.; Bretón M.; Tellez A.; Reyes-Alfaro G.; Vázquez H. (2006)

A methodology is proposed for the quantification of volcanic explosions based on three parameters derived from broad-band seismic signals: The counter force of the eruption F, the power of the explosion P and the duration ...
SEISMIC ATTENUATION DUE TO WAVE-INDUCED FLUID FLOW IN A POROUS ROCK WITH SPHERICAL HETEROGENEITIES

Ciz R.; Gurevich B.; Markov M. (2006)

Most natural porous rocks have heterogeneities at nearly all scales. Heterogeneities of mesoscopic scale - That is, much larger than the pore size but much smaller than wavelength - Can cause significant attenuation and ...
PREDATORY DRILL HOLES AND PARTIAL MORTALITY IN DEVONIAN COLONIAL METAZOANS

Wilson M.A.; Taylor P.D. (2006)

Elliptical holes ~0.2-0.3 mm in diameter with beveled edges have been found penetrating the zooids of encrusting hederellids (colonial metazoans of uncertain affinity) from several localities in the Middle Devonian (Givetian) ...
CHANGE OF EVAPOTRANSPIRATION COMPONENTS DUE TO THE SUCCESSION FROM JAPANESE RED PINE TO EVERGREEN OAK

Iida S.; Tanaka T.; Sugita M. (2006)

Extensive measurements of water balance components in a forest under the succession from Japanese red pine (Pinus densiflora) to evergreen oak (Quercus myrsinaefolia) were carried out. Significant decreases of transpiration ...
INTERACTION BETWEEN MANTLE-DERIVED AND CRUSTAL CALC-ALKALINE MAGMAS IN THE PETROGENESIS OF THE PALEOCENE SIFTON RANGE VOLCANIC COMPLEX, YUKON, CANADA

Mišković A.; Francis D. (2006)

The uplifted plutons of the eastern Coast Plutonic Complex (CPC) of the northern Canadian Cordillera are in contact with coeval volcanic suites of the early Tertiary Sloko-Skukum Group, offering a unique opportunity to ...
PALEOCEANOGRAPHY AND CLIMATE OF THE BADENIAN (MIDDLE MIOCENE, 16.4-13.0 MA) IN THE CENTRAL PARATETHYS BASED ON FORAMINIFERA AND STABLE ISOTOPE (δ18O AND δ13C) EVIDENCE

Báldi K. (2006)

Benthic foraminifera and stable isotopes analyses revealed changes emerging in the paleoceanographic scenery in the Paratethys. The percentage of inbenthic, oxyphylic taxa and diversity in the benthic foraminiferal assemblage ...
AN EXPERIMENTAL STUDY ON FISCHER-TROPSCH CATALYSIS: IMPLICATIONS FOR IMPACT PHENOMENA AND NEBULAR CHEMISTRY

Sekine Y.; Sugita S.; Matsui T.; Shido T.; Yamamoto T.; Iwasawa Y.; Kadono T. (2006)

Fischer-Tropsch catalysis, by which CO and H2 are converted to CH4 on the surface of transition metals, has been considered to be one of the most important chemical reactions in many planetary processes, such as the formation ...
OLIVINE ZONING AND RETROGRADE OLIVINE-ORTHOPYROXENE-METAL EQUILIBRATION IN H5 AND H6 CHONDRITES

Reisener R.J.; Goldstein J.I.; Petaev M.I. (2006)

Electron microprobe studies of several H5 and H6 chondrites reveal that olivine crystals exhibit systematic Fe-Mg zoning near olivine-metal interfaces. Olivine Fa concentrations decrease by up to 2 mol% toward zoned taenite ...
SHALLOW GAS OFF THE RHôNE PRODELTA, GULF OF LIONS

García-García A.; Orange D.; Lorenson T.; Radakovitch O.; Tesi T.; Miserocchi S.; Berné S.; Normand A.; Friend P.L.; Nittrouer C. (2006)

Sediment cores acquired in 2004 off the Rhône prodelta show consistent anomalous methane concentrations of up to 87,440 ppm. Methane compositional and isotopic data support a biogenic origin, although there are a few sites ...
POROSITY INFERENCE AND CLASSIFICATION OF SILICICLASTIC ROCKS FROM MULTIPLE DATA SETS

Loures L.G.L.; Moraes F.S. (2006)

We develop a Bayesian formulation for joint inference of porosity and clay volume, incorporating multiple data sets, prior information, and rock physics models. The derivation is carried out considering the full uncertainty ...
PALAEOMAGNETISM OF 935 MA MAFIC DYKES IN SOUTHERN SWEDEN AND IMPLICATIONS FOR THE SVECONORWEGIAN LOOP

Pisarevsky S.A.; Bylund G. (2006)

New palaeomagnetic results for the 935 Ma Göteborg-Slussen mafic dykes in southern Sweden provide a well-dated high-quality palaeomagnetic pole for Early Neoproterozoic Baltica. New U-Pb geochronological data for several ...
REVISED AGE OF ALEUTIAN ISLAND ARC FORMATION IMPLIES HIGH RATE OF MAGMA PRODUCTION

Jicha B.R.; Singer B.S.; Scholl D.W.; Yogodzinski G.M.; Kay S.M. (2006)

Radioisotopic dating of subaerial and submarine volcanic and plutonic rocks from the Aleutian Island Arc provides insight into the timing of arc formation in the middle Eocene. Twenty-eight 40Ar/39Ar ages constrain the ...
STEADY-DIFFUSION MODELLING OF A REACTION ZONE BETWEEN A METAMORPHOSED BASIC DYKE AND A MARBLE FROM HIRAO-DAI, FUKUOKA, JAPAN

Fukuyama M.; Nishiyama T.; Urata K.; Mori Y. (2006)

A reaction zone between a metamorphosed basic dyke and marble at Hirao-dai, north Kyushu, Japan, consists of well-organized sequential zones of diopside, garnet and wollastonite; textures are characteristic of diffusion-controlled ...
SENSITIVITY ANALYSIS OF GASSMANN'S FLUID SUBSTITUTION EQUATIONS: SOME IMPLICATIONS IN FEASIBILITY STUDIES OF TIME-LAPSE SEISMIC RESERVOIR MONITORING

Artola F.A.V.; Alvarado V. (2006)

Here, we discuss the sensitivity of the seismic response to uncertainties in the physical parameters of the reservoir rock. For this purpose, a probabilistic sensitivity analysis of Gassmann's fluid substitution equations ...

Now showing items 41-60 of 24508

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