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Topic: Oslo Graben

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	Rifting in heterogeneous lithosphere: Inferences from numerical modeling of the northern North Sea and the Oslo Graben
		In particular, the Oslo Graben and the northern North Sea rift initiated in close areas of northern Europe.
		The Oslo Graben evolved in the cold and stable Precambrian lithosphere of Fennoscandia, whereas the northern North Sea rift took birth in freshly reworked Caledonian lithosphere.
		Consequently, we suggest that rifting in the northern North Sea began as early as regional extension was effective (i.e., Late Carboniferous–Early Permian) and does not postdate the Oslo Graben as it is commonly assumed.
	www.agu.org /pubs/crossref/2002/2001TC901044.shtml (381 words)

	Graben - Wikipedia, the free encyclopedia
		A graben is a depressed block of land bordered by parallel faults.
		A graben is the result of a block of land being downthrown producing a valley with a distinct scarp on each side.
		Graben are produced from parallel normal faults, where the hanging wall is downthrown and the footwall is upthrown.
	en.wikipedia.org /wiki/Graben (173 words)

	BT Research - Graben (Site not responding. Last check: 2007-10-29)
		A graben is the result of a block of land being downthrown producing a valley with a distinct scarp on each side.
		Graben are produced from parallel normal faults, where the hanging wall is downthrown and the footwall is upthrown.
		Horsts are parallel blocks that remain between grabens, the bounding faults of a horst typically dip away from the center line of the horst.
	www.breathittteens.com /research.php?title=Graben (183 words)

	Oslo -- Britannica Student Encyclopedia
		The PLO officials conducting the so-called unofficial discussions in Oslo, Norway, were far more flexible than the official non-PLO Palestinian delegation in Washington, and Rabin decided to gamble that 'Arafat was the only Palestinian leader who could...
		Located at the head of Oslo Fjord in the southeast, it is the main center of finance, trade, manufacturing, and shipping.
		Oslo's port is the largest and busiest in the country.
	www.britannica.com /ebi/article-9276222 (749 words)

	Proposal for Wide Angle Seismic experiment in the Skagerrak
		Accessibility and economic interests have caused the Oslo Graben and the North Sea basins to be well-studied areas.
		The Skagerrak Graben is the offshore continuation of the Oslo Graben (Ramberg and Smithson, 1975; Ro et al., 1990; Fig.
		Furthermore, the deviation of the gravity anomaly from the graben axis (Fig.
	folk.uio.no /heereman/proposal.html (2234 words)

	290
		Mantle Reservoirs, Xenocrysts and Magmatic Disequilibrium in the Skien Basalts, Oslo Rift
		Institutt for Geologi, Universitetet i Oslo, Postboks 1047 Blindern, Norway
		The Skagerrak graben is the offshore continuation of the well-known Oslo graben.
	camb.demonhosting.co.uk /JConfAbs/4/290.html (13040 words)

	Oslo plume?
		In order to discuss the development of the Oslo Graben in terms of plate vs. plume models, it is most important to understand its spatial and temporal relationship with other areas in NW Europe.
		Neumann (1994) estimated the extrusion temperatures of the basaltic lavas to be approximately 1270-1340°C. This indicates normal or slightly elevated mantle temperatures and suggests that the extensive Oslo Graben magmatism was not associated with a major temperature anomaly.
		Paleostress reconstruction from kinematic indicators in the Oslo Graben, southern Norway.
	www.mantleplumes.org /Norway.html (3876 words)

	Tectonic and magmatic evolution of the Oslo Rift (Site not responding. Last check: 2007-10-29)
		Tectonic and magmatic evolution of the Oslo Rift
		The Permo-Carboniferous Oslo Rift was created by east-west extension in response to northward compression from the Variscan segment of the Hercynian Orogen.
		The main stage of graben formation was accompanied by fissure eruptions of 0.5 - 3 km thick successions of mostly latitic rhomb porphyries.
	www.jfi.is /fund/Reidar_Tronnes_Oslo_Rift.html (277 words)

	Sveconorwegian (Site not responding. Last check: 2007-10-29)
		Moving westwards away from the Oslo graben the Southwest Scandinavian Domain is subdivided into the Bamble-Konsberg sector, Telemark sector, and Rogland-Vest Agder Sector separated from east to west by the north-south trending, eastward dipping Friction Breccia (Bugge, 1928)/Porsgrunn-Kristiansand Fault (Starmer, 1985) and Mandal-Ustaoset Fault Zone (Sigmond, 1985).
		The Oslo graben may be a reactivation of a Gothian suture.
		Hageskov, B., 1978, On the Precambrian structures of the Sandbukta-Mölen inlier in the Oslo graben, SE Norway: Nor.
	homes.jcu.edu.au /~jc146233/sveconorwegian.html (6591 words)

	GO 568 Northern Europe I
		An exception is the Oslo Graben of southern Norway, where continental rifting began, but failed to develop beyond the initial stage.
		Rhyolitic intrusions mark reactivation of the Oslo Graben during the Permian.
		These intrusions are evidence for crustal tension associated with rifting of the Oslo Graben.
	academic.emporia.edu /aberjame/struc_geo/euro_north/euro1.htm (978 words)

	Igneous Rocks of Contintental Lithosphere
		A series of Triassic to Jurassic grabens that occur along eastern North America and extend from Canada to Georgia that appear to have formed in a failed attempt to rift North America away from Eurasia/Africa.
		Another failed rift is the Oslo Graben of southern Norway, of late Paleozoic age.
		The Rhine graben, between Germany and France is an active rift in which have erupted both silica undersaturated phonolitic ignimbrites along with alkaline trachytes and rhyolites.
	www.tulane.edu /~sanelson/geol212/cont_lithosphere.htm (4186 words)

	Geology of Norway
		So this area is spotted with various interesting mining regions, for example there are numerous mines in the area southwest of Oslo.
		Oslo itself is sitting on the Oslo Rift which is built of very young magmatic rocks of the Permian (300-250 Ma).
		The Oslo Graben is a failed rift system, which continues into the Skagerrak and the North Sea.
	www.showcaves.com /english/no/Geology.html (440 words)

	Abstract Heeremans et al., 1996 (Site not responding. Last check: 2007-10-29)
		The Oslo Graben, southern Norway, is a N-S-trending Carboniferous-Permian rift system, characterized by major mafic to silicic magmatism, N-S-trending faults, reactivation of preexisting Precambrian faults and formation of half grabens.
		We suggest that the Oslo Graben can not simply be explained in terms of, or passive, or active rifting, but that a combination of both, evolving through time, is more suitable to explain the observations.
		We propose a model in which the Oslo Graben is initially triggered by far field stresses in the latest Carboniferous and earliest Permian, which infers opening due to passive rifting.
	folk.uio.no /heereman/tectonophysics_266.html (398 words)

	EVOLUTION OF THE ARCTIC-NORTH ATLANTIC AND THE WESTERN TETHYS--A VISUAL PRESENTATION OF A SERIES OF ...
		However, while volcanic activity is not necessarily restricted to zones of upper crustal extension, the occurrence of lateral volcanic centers appears to be limited to the area of the corresponding rift dome and by implication to the zone of the thermally upward-displaced asthenosphere-lithosphere boundary.
		In the case of the Rhine Graben, lateral volcanic centers are confined to the outlines of the subcrustal asthenolith.
		The amount of postrifting, tectonic subsidence of passive margins and inactive grabens, which is caused by cooling and contraction of the lithosphere and its return to thermal equilibrium, is controlled by the magnitude of the thermal anomaly that was induced during crustal separation or the crustal attenuation stage.
	www.searchanddiscovery.com /documents/97020/memoir43.htm (13414 words)

	home
		The Oslo Graben is part of the Oslo Palaeorift, a continental rift system of Permian-Cretaceous age, that was one of the precursors to the opening of the Atlantic Ocean.
		The chosen area of investigation lies in the most south-westerly area of the Oslo Graben, between Porsgrunn and Larvik (see map).
		The sedimentary, meta-sedimentary and igneous rocks of this region south of Skien, have rarely been studied since the pioneering work of Brøgger in the latter part of the 19th Century.
	www.toyen.uio.no /geomus/forskning/southwestern_oslo_graben (708 words)

	EUCOR-URGENT: Upper Rhine Graben Evolution & Neotectonics (Site not responding. Last check: 2007-10-29)
		Bouguer gravity of the Upper Rhine Graben: The effect of the basement on the gravity field.
		Rifting in heterogeneous lithosphere; inferences from numerical modeling of the northern North Sea and the Oslo Graben.
		Evolution of fluid circulation in the Rhine Graben; constraints from the chemistry of present fluids.
	comp1.geol.unibas.ch /modules.php?name=Content&pa=showpage&pid=2 (6129 words)

	Fluid-Rock Interactions
		In the Central Graben, Northern North Sea and Haltenbanken the subsurface pressure is mostly controlled by the degree of lateral drainage.
		Thus, complex mineral zonation patterns may be valuable records of changes in the hydrothermal fluid composition caused by variable kinetic dispersion and thus variable fluid flow rates at the site of crystal growth.
		Observed oscillatory zonation patterns from hydrothermal garnets formed in contact aureoles in the Oslo rift are consistent with these results.
	www.fys.uio.no /faststoff/sup/Meetings/AbsKongsberg96 (7539 words)

	Oslograben - Wikipedia, the free encyclopedia
		Oslograben or Oslo Graben is a rift valley in southeastern Norway that includes the capital city Oslo.
		Because of its geography, Oslo is one of the most smog-prone regions in the world.
		It contains Europe's only known deposit of emeralds.
	en.wikipedia.org /wiki/Oslograben (91 words)

	Middle East Open Encyclopedia: Graben (Site not responding. Last check: 2007-10-29)
		This is an extract from The Middle East Open Encyclopedia, made possible through the Wikimedia Foundation.
		Iraq Museum International always displays the most recent published revision of the source article, Graben; all previous versions may be viewed here.
		They link directly to authoring tools for you to start writing a particular article.
	www.baghdadmuseum.org /ref/index.php?title=Graben (303 words)

	Northward sediment transport from the late carboniferous variscan mountains: Zircon evidence from the Oslo Rift, Norway ... (Site not responding. Last check: 2007-10-29)
		High-precision U-Pb ages of single detrital zircon grains from a Moscovian (late Westphalian to early Stephanian) sandstone and overlying tuffaceous sediments, that predated initial basaltic volcanism, have been used to study the provenance of the detritus and to evaluate the tectonic significance of the deposits.
		The Oslo Rift is a late Carboniferous to early Permian transtensional and extensional basin formed within the crystalline basement of the Baltic Shield and its cover of Cambro-- Silurian, mainly marine, platform sediments.
		Near Oslo, the Asker Group sedimentary sequence is less than 40 m thick and has been subdivided into the Kolss, Tanum and Skaugurn Formations (Dons & Gyory 1967; Henningsmoen 1978).
	www.findarticles.com /p/articles/mi_qa3721/is_200101/ai_n8939658 (840 words)

	lect3-2
		stage involves early graben formation prior to continental splitting.
		This stage may be associated with domal uplift caused by uprise of hot upper mantle material - but this uplift is not ubiquitous and may be connected with underlying mantle hotspots.
		This stage is characterised by rapid regional subsidence of the outer shelf and slope, but some graben formation may persist.
	www.le.ac.uk /geology/art/gl209/lecture3/lect3-2.html (647 words)

	Oslo Things To Do - Travel Guides - VirtualTourist.com
		With an area of 766 square miles (1,984 square km), the fjord occupies a glacier-formed depression, or graben, that has been partially filled and partially reexcavated.
		Oslo's administrative body and seat of the City Council.
		My favourite place in Oslo :) But please notice, the park was filled with asian tourists from the morning to the evening.
	www.virtualtourist.com /travel/Europe/Norway/Oslo_Region/Oslo-214570/Things_To_Do-Oslo-R-29.html (844 words)

	Effect of lithosphere thickness heterogeneities in controlling rift localization: Numerical modeling of the Oslo Graben
		We present 2-D thermo-mechanical and numerical modeling at lithospheric scale to assess the impact of pre-existing lithosphere thickness contrast on rift localization.
		The results of the modeling suggest that thickness heterogeneity was responsible for focussing rifting and passive asthenospheric upwelling in the Permo-Carboniferous Oslo Graben at the western margin of the Fennoscandian Shield.
		These findings are consistent with inferences from recent studies showing that both the crust-mantle boundary and the base of the lithosphere are and were deeper at the eastern margin of the Oslo Graben, resulting in contrasting crust and lithosphere thickness.
	www.agu.org /pubs/crossref/2002/2001GL014354.shtml (242 words)

	SEPM-Data Archive (Site not responding. Last check: 2007-10-29)
		In contrast, Silurian sediments exposed in the Oslo area show only few signs of early exposure but were severely affected by thermal alteration during burial of the succession.
		Extensive fluid/rock exchange was facilitated by brittle deformation, as evidenced by numerous luminescent microfractures and macrofractures crosscutting brachiopod shells and surrounding sediments.
		The case study from the Oslo Graben demonstrates that high fluid/rock ratios and thermal overprinting during burial diagenesis may result in pervasive diagenetic alteration of d
	www.sepm.org /archive/wenzel2000_01/index.html (440 words)

	PS Wiki Encyclopedia (Site not responding. Last check: 2007-10-29)
		In geology, a rift is a place where the Earth's crust and lithosphere are being pulled apart.
		Typical features are a central linear downdropped fault segment, called a graben, with parallel normal faulting and rift-flank uplifts on either side.
		The axis of the rift area commonly contains volcanic rocks and active volcanism is a part of many but not all active rift systems.
	70.84.119.226 /~puresear/PSWiki/index.php?title=Rift_(geology) (229 words)

	PLATE TECTONICS: Lecture 2
		Early rift sediments are downfaulted into the developing rift (graben).
		New sediments are deposited within the graben as a result of erosion of the uplifting sides of the graben.
		So there are both pre-rift and syn-rift sediments within the developing rift valley, but sediments on the flanks are progressively erodied away.
	www.le.ac.uk /geology/art/gl209/lecture3/lecture3.html (2032 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #5543304 - The geology and geophysics of the Oslo Rift
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		The geology and geophysics of the Oslo Rift
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=5543304 (91 words)

	Balticshield
		These faults have probably the same age as the one of Ladoga graben, that is to say, Gothian or reactivated late Svecofennian.
		As the ”central” zone, it is well known to shape several Riphean structures, like Pachelma aulacogen and Moscow graben.
		Further they had prominent input either in the determination of the sedimentation pattern, or as the hinge zones.
	www.scope.ruc.dk /Balticshield.htm (2964 words)

	Northward sediment transport from the late Carboniferous Variscan Mountains: zircon evidence from the Oslo Rift, Norway ...
		Northward sediment transport from the late Carboniferous Variscan Mountains: zircon evidence from the Oslo Rift, Norway -- DAHLGREN and CORFU 158 (1): 29 -- Journal of the Geological Society
		Northward sediment transport from the late Carboniferous Variscan Mountains: zircon evidence from the Oslo Rift, Norway
		University of Oslo, Mineralogical-Geological Museum, Sars gate 1, N-0562 Oslo, Norway
	jgs.geoscienceworld.org /cgi/content/abstract/158/1/29 (418 words)

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