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Now showing items 161-180 of 25946

PALEOCEANOGRAPHIC HISTORY AROUND THE TSUGARU STRAIT BETWEEN THE JAPAN SEA AND THE NORTHWEST PACIFIC OCEAN SINCE 30 CAL KYR BP

Koizumi I.; Tada R.; Narita H.; Irino T.; Aramaki T.; Oba T.; Yamamoto H. (2006)

The paleoceanographic history around the Tsugaru Strait since 30.0 cal kyr BP was reconstructed using ecological and biogeographical habitats of diatom species and Q-mode factor analysis of diatom flora in six piston cores. ...
THE GIBRALTAR ARC SEISMOGENIC ZONE (PART 2): CONSTRAINTS ON A SHALLOW EAST DIPPING FAULT PLANE SOURCE FOR THE 1755 LISBON EARTHQUAKE PROVIDED BY TSUNAMI MODELING AND SEISMIC INTENSITY

Gutscher M.-A.; Baptista M.A.; Miranda J.M. (2006)

The Great Lisbon earthquake has the largest documented felt area of any shallow earthquake and an estimated magnitude of 8.5-9.0. The associated tsunami ravaged the coast of SW Portugal and the Gulf of Cadiz, with run-up ...
EXHUMATION OF MESSINIAN EVAPORITES IN THE DEEP-SEA AND CREATION OF DEEP ANOXIC BRINE-FILLED COLLAPSED BASINS

Cita M.B. (2006)

The first part of the paper summarizes some basic concepts concerning (a) the distribution of Messinian evaporites in the deepest parts of the Mediterranean Sea and (b) the Mediterranean Ridge accretionary wedge and its ...
THE GIBRALTAR ARC SEISMOGENIC ZONE (PART 1): CONSTRAINTS ON A SHALLOW EAST DIPPING FAULT PLANE SOURCE FOR THE 1755 LISBON EARTHQUAKE PROVIDED BY SEISMIC DATA, GRAVITY AND THERMAL MODELING

Thiebot E.; Gutscher M.-A. (2006)

The Great Lisbon earthquake of 1755 with an estimated magnitude of 8.5-9.0 is the most destructive earthquake in European history, yet the source region remains enigmatic. Recent geophysical data provide compelling evidence ...
JOHNSENITE-(CE): A NEW MEMBER OF THE EUDIALYTE GROUP FROM MONT SAINT-HILAIRE, QUEBEC, CANADA

Grice J.D.; Gault R.A. (2006)

Johnsenite-(Ce), ideally Na12(Ce,La,Sr,Ca,□)3 Ca6Mn3Zr3W(Si25 O73)(CO3)(OH,Cl)2, is a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, and is the W analogue of zirsilite-(Ce). It occurs as deeply etched, ...
LEMANSKIITE, NACACU5(ASO4) 4CL·5H2O, A NEW MINERAL SPECIES FROM THE ABUNDANCIA MINE, CHILE

Ondruš P.; Veselovský F.; Frýda J.; Gabašová A.; Skála R.; Sejkora J.; Pažout R.; Vajdak J. (2006)

Lemanskiite, ideally NaCaCu5(AsO4) 4Cl·5H2O, is a new mineral species from the Abundancia mine, El Guanaco mining district, Chile. It is dimorphous with lavendulan and represents the Ca-analogue of zdenekite. It occurs as ...
PALEOBIOGEOGRAPHY OF AFRICA: HOW DISTINCT FROM GONDWANA AND LAURASIA?

Gheerbrant E.; Rage J.-C. (2006)

Although Africa was south of the Tethys Sea and originally belonged to the Gondwana, its paleobiogeographical history appears to have been distinct from those of both Gondwana and Laurasia as early as the earliest Cretaceous, ...
THE ELEVATION HISTORY OF THE TIBETAN PLATEAU AND ITS IMPLICATIONS FOR THE ASIAN MONSOON

Harris N. (2006)

The determination of the evolving palaeoaltitude of the Tibetan Plateau since the India-Eurasia collision underpins our understanding of how orography in central Asia affects the intensity of the monsoon and hence global ...
PRIMARY CURVATURE IN THE MID-CONTINENT RIFT: PALEOMAGNETISM OF THE PORTAGE LAKE VOLCANICS (NORTHERN MICHIGAN, USA)

Hnat J.S.; van der Pluijm B.A.; van der Voo R. (2006)

Rocks of the North American Mid-Continent Rift (MCR) in the Keweenaw Peninsula of northern Michigan display a change in structural trend from east to west, varying in strike from 100° in the east to 35° farther west, before ...
LITHOLOGICAL INTERPRETATION OF CRUSTAL COMPOSITION IN THE FENNOSCANDIAN SHIELD WITH SEISMIC VELOCITY DATA

Kuusisto M.; Kukkonen I.T.; Heikkinen P.; Pesonen L.J. (2006)

In this study, we report the results of an investigation of lithological interpretation of the crust in the central Fennoscandian Shield (in Finland) using seismic wide-angle velocity models and laboratory measurements on ...
A SIMPLE METHOD FOR PRECISE DETERMINATION OF 23 TRACE ELEMENTS IN GRANITIC ROCKS BY ICP-MS AFTER LITHIUM TETRABORATE FUSION

Awaji S.; Nozaki T.; Kato Y.; Nakamura K. (2006)

An improved alkali fusion method followed by HF-HNO3-HClO4 treatment is performed for simultaneous determination of 23 trace elements (Sr, Y, Zr, Nb, Ba, Hf, Ta, Th, U, and REE) by ICP-MS in rock reference materials: ...
HIERARCHICAL AGGREGATION IN PERCOLATION MODEL

Zaliapin I.; Wong H.; Gabrielov A. (2006)

There is a growing belief that the complex dynamics of seismicity can be better understood by studying the collective behavior of numerous lithosphere instability sources rather than focusing on the details of each of them. ...
GEOPHYSICAL AND PETROPHYSICAL STUDY OF AN IRON OXIDE COPPER GOLD DEPOSIT IN NORTHERN SWEDEN

Sandrin A.; Elming S.-Å. (2006)

A geophysical-petrophysical study has been performed in an area WSW of the city of Kiruna, northern Sweden. The sub-regional tectonic setting is dominated by two important shear zones, which define the boundary of a granitic ...
SEDIMENTOLOGY AND GEOCHEMISTRY OF EXTENSIVE VERY COARSE DEEPWATER SUBMARINE FAN SEDIMENTS IN THE MIDDLE JURASSIC OF OMAN, EMPLACED BY GIANT TSUNAMI TRIGGERED BY SUBMARINE MASS FLOWS

Brookfield M.E.; Wilson G.; Blechschmidt I.; Hannigan R.; Coniglio M.; Simonson B. (2006)

Unusual fining upwards coarse conglomerates overlain by sandstones, thin cherts and green shales occur at the top of the deep-water submarine fan deposits of the Oolitic Limestone Member of the Jurassic Guwayza Formation ...
TEST OF THE UPPER MANTLE LOW VELOCITY LAYER IN SIBERIA WITH SURFACE WAVES

Pontevivo A.; Thybo H. (2006)

The existence of the upper mantle low velocity layer (LVL) below 100 km depth in cratonic areas is tested with surface waves dispersion curves. Given the ambient noise we find that a pronounced LVL (80 km thick and 2% ...
APATITE-GROUP MINERALS FROM NEPHELINE SYENITE, PILANSBERG ALKALINE COMPLEX, SOUTH AFRICA

Liferovich R.P.; Mitchell R.H. (2006)

The nepheline syenites of the Pilansberg alkaline complex (South Africa) have undergone extensive subsolidus equilibration and alteration with a deuteric Cl- and Na-rich fluid phase. Complex assemblages of secondary minerals ...
MOLYBDENITE RE-OS AND ALBITE 40AR/39AR DATING OF CU-AU-MO AND MAGNETITE PORPHYRY SYSTEMS IN THE YANGTZE RIVER VALLEY AND METALLOGENIC IMPLICATIONS

Mao J.; Li Y.; Zang W.; Wang Y.; Yu J.; Du A.; Mei Y.; Lehmann B.; Stein H.J.; Zhou T. (2006)

The area of the Middle-Lower Yangtze River valley, Eastern China, extending from Wuhan (Hubei province) to western Zhenjiang (Jiangsu province), hosts an important belt of Cu-Au-Mo and Fe deposits. There are two styles of ...
GEOCHEMISTRY AND SEDIMENTARY PETROLOGY OF ARCHEAN CLASTIC SEDIMENTARY ROCKS AT MT. GOLDSWORTHY, PILBARA CRATON, WESTERN AUSTRALIA: EVIDENCE FOR THE EARLY EVOLUTION OF CONTINENTAL CRUST AND HYDROTHERMAL ALTERATION

Sugitani K.; Yamashita F.; Nagaoka T.; Yamamoto K.; Mimura K.; Minami M.; Suzuki K. (2006)

Geochemical and petrological analyses of Archean clastic metasedimentary rocks at Mt. Goldsworthy in the Pilbara Craton, Western Australia reveal the early evolution of continental crust and the Earth's surface environment. ...
A WAY TO SYNCHRONIZE MODELS WITH SEISMIC FAULTS FOR EARTHQUAKE FORECASTING: INSIGHTS FROM A SIMPLE STOCHASTIC MODEL

González Á.; Gómez J.B.; Vázquez-Prada M.; Pacheco A.F. (2006)

Numerical models are starting to be used for determining the future behaviour of seismic faults and fault networks. Their final goal would be to forecast future large earthquakes. In order to use them for this task, it is ...
GRAVITY MODELLING OF THE HELLENIC SUBDUCTION ZONE - A REGIONAL STUDY

Casten U.; Snopek K. (2006)

The Hellenic subduction zone is clearly expressed in the arc-shaped distribution of earthquake epicenters and gravity anomalies, which connect the Peloponnesos with Crete and Anatolia. In this region, oceanic crust of the ...

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