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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 116 for “"Graben"”.
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Fluvial sedimentation in continental half-graben basins
… basin based on the form of a simple half graben with four interacting supply points of sediment and water that produced an axial fan and longitudinal channel flanked by transverse fans. Imposition of various combinations of lateral and axial sediment flux showed that the locations and …
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Kerogen variation in a Devonian half graben system
… matter. It was deposited into a series of half graben formed by the collapse of over-thickened Caledonian crust. The 14 lake cycles that comprise the Rousay Flagstone Formation (RFF) were correlated across Orkney during 6 months of fieldwork. Two of the lake cycles were sampled in detail for …
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Tectonic evolution of the Thakkahola Graben and Dhaulagiri Himalaya, Central Nepal
… South Tibetan fault system (STFS); the Thakkhola graben; and structures bounding the Upper Mustang Massif (UMM). Interactions between these systems are investigated using integrated field studies, remote sensing analyses, geodynamic modeling, and a wide variety of geochronologic tools. The goals …
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Geology of the Tierras Blancas Area in the Southeastern Acambay Graben, Central Mexico
… sediments in the southeastern Acambay graben, central Mexico have yielded mammal fossils, including <em>Equus simplicidens</em>, cf. <em>Rhynchotherium</em>, ?<em>Camelops</em>, <em>Mammuthus</em> sp., <em>Bison</em> sp., and <em>Antilocapra</em> sp. The fossiliferous sediments include …
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Fault segmentation and paleoseismicity along the North Wutaishan Fault of the Shanxi Graben System, China
The Shanxi Graben System has been the location of large, devastating intraplate earthquakes in the past, making it an ideal location for the study of the temporal recurrence of intracontinental earthquakes. This study conducts a paleoseismic investigation on the North Wutaishan Fault (NWTSF) at the …
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The structural geology of the Southern Norwegian Caledonides in the Oslo Graben and Sparagmite region
… of Cambro-Silurian rocks were mapped in the Oslo Graben. Undeformed rocks are only present in the southern part of the Oslo Graben and palinspastic reconstructions of the Oslo Graben restore the traditional thrust front in southern Mjosa 135km NNW of its current position. Therefore it is proposed …
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Modification of magnetic properties in granite during hydrothermal alteration (EPS-1 borehole, Upper Rhine Graben)
… granite from the EPS-1 borehole (Upper Rhine Graben) provided a significant contribution for the understanding of the “old” (Middle Carboniferous to Permo-Triassic) hydrothermal alteration history. This alteration history is generally subdivided into two stages. Stage I alteration is related …
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The relationship between active faulting and fluvial geomorphology: a case study in the Gediz Graben, Turkey.
… Quaternary tectonic history of the Gediz Graben, Turkey, providing the first quantification of rates of movement of the key fault array that presently controlling graben topography. The fluvial network has been investigated and the data has been used in order to add resolution to the …
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A geological and geophysical study of the Tendaho Graben in the Afar Depression, Ethiopia: insights into transitional continental rifting
… magnetic and gravity study across the Tendaho Graben (the Red Sea propagator within the Afar Depression, Ethiopia) revealed features that can best be interpreted as a continental rift undergoing oceanization. This NW-trending extensional structure is ~50 km wide and it is confined within …
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Investigations on the thermal calibration of sedimentary basin models - a case study from the Horn Graben in the Danish North Sea
The Horn Graben is a relatively under explored part of the Danish North Sea. Although extensive exploration in the adjacent Central Graben was very successful only three exploration wells have been drilled in the Danish part of the Horn Graben. Data obtained from two of the wells were used for …
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Subsurface structural geology of the eastern part of the Büyük Menderes Graben, western Turkey: implications for structural evolution of the Büyük Menderes and Alasehir Grabens
… approximately E-W trending seismically active grabens: the Alasehir and Büyük Menderes Grabens (BMG). Seven depth-converted 2-D seismic reflection profiles and well log data from one well are used to delineate the geometry of the subsurface structural features and the Cenozoic stratigraphy of …
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Bacia do Riacho Pioré-PE: análise morfotectônica e morfoestratigráfica
… a compartimentação morfotectônica em horst, grabens e hemigrabens. Estas estruturas se dispõe no sentido sudoeste-nordeste e crescem altimetricamente no sentido oeste-leste. Em uma estrutura em blocos escalonados onde foram identificados os seguintes compartimentos no sentido oeste- leste …
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Fluid/rock Interaction History of a Faulted Rhyolite-Granite Contact, Eastern Rhine Graben Shoulder, SW-Germany : Alteration Processes Determined by Sr- Pb-Isotopes, Th/U-Disequilibria and Elemental Distributions
… fault zone is situated along the eastern Rhine Graben shoulder, close to Heidelberg (SW-Germany). Major and trace element analyses allow to obtain information concerning the chemical changes induced by alteration. Differences are partly petrographic because the profile crosses the …
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Identification, Characterization and Analysis of Wrench Related Faulting in Southwestern Warren County, Kentucky
… of the southern boundary of the Rough Creek Graben marked by the Pennyrile fault system. The Pennyrile fault system is a regional southwest-northeast trending fault system that extends into Kentucky from the Reelfoot rift zone. The Rough Creek fault system bounds the northern arm of the Rough …
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Structural development of a volcanic sequence of the Lahn area during the Variscan orogeny in the Rhenohercynian Belt (Germany)
… orogeny. With it, in the study area full-graben and half-graben basins can be recognized as a full-graben at the Kirschhofen syncline, antithetic half-grabens at the Guntersau-Freienfels and the Freienfels-Ernsthausen sub-areas and synthetic half-grabens at the Ahausen syncline and the …
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The effect of preexisting joints on normal fault evolution : insights from fieldwork and analogue modeling
… study, remote sensing and analogue modeling. The Grabens Area of the Needles fault zone in the Canyonlands National Park, Utah/USA was chosen as field analogue. This arcuate array of young grabens (younger than SI{100}{ka}) extends over several kilometers along the Colorado River in Permian …
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ΟΙ ΥΔΡΟΓΕΩΛΟΓΙΚΕΣ ΣΥΝΘΗΚΕΣ ΤΩΝ ΚΑΡΣΤΙΚΩΝ ΚΑΙ ΝΕΟΓΕΝΩΝ ΣΥΣΤΗΜΑΤΩΝ ΤΗΣ ΛΕΚΑΝΗΣ ΜΟΛΑΩΝ (ΛΑΚΩΝΙΑ)
… FAULTS (VIZ. NNW TO NW AND NNE TO NE). THUS GRABENS AND HORSTS WERE CREATED (E.G. MOLAI GRABEN, ASOPOS HORST, PLYTRA GRABEN. THERE WERE RECOGNISED FOUR KARSTIC EROSIONAL SURFACES. THE GEOLOGIC FORMATIONS OUTCROPPING IN THE MOLAI AREA ARE THE FOLLOWING: A) PHYLLITE-QUARTZITE SERIES, B) TYROS …
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Tectonic Setting, Structure, and Seismic Stratigraphy of the Apalachicola Rift and its Overlying Sag Basin in the Northeastern Gulf of Mexico
… Gulf of Mexico (GOM) is a ~220-km- long half-graben that contains 5-8 km of undrilled, syn-rift clastic deposits inferred to be of late Triassic-early Jurassic age. Previous workers have interpreted pre-salt (Triassic-early Jurassic), basinward-dipping, seismic reflectors within the syn-rift …
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