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Showing 1 to 20 of 41 for “"Grabens"”.
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Identifying source rocks and reservoir elements of South China Sea grabens using 3D seismic data, West Natuna Basin, Indonesia
… the source and reservoir potential of half grabens in the Gabus and Belanak surveys in the West Natuna Basin by reconstructing the stratigraphy. The stratigraphic architecture of the folded, asymmetric fill can be imaged by stratal slicing. Utilizing 3D seismic geomorphology from 150 stratal …
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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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Kimmeridgian and Volgian fault-margin sedimentation in the Northern North Sea area
… in which there was rapid subsidence in the grabens and uplift of the adjacent areas. The initiation of coarse-grained sedimentation in the grabens was directly related to an increase in subsidence rates. At Sutherland the most sand-rich sequences were deposited during the cymodoce zone of …
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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
… or sills erupted and tilted within Mesozoic half-grabens; or 2) as layered, volcanic flows ("seaward-dipping reflectors") erupted during GOM phase 1 rifting of late Triassic- early Jurassic age. My study uses a 35,000 km grid of 2D, pre-stack depth-migrated, industry seismic reflection data, tied …
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Diagenese der känozoischen Sedimente des Oberrheingrabens als Hinweis der tertiären Fluidentwicklung
… Diagenese der tertiären Sedimente des Oberrheingrabens mit speziellem Augenmerk auf Karbonatzementation in Klüften und Porenraum geben Auskunft über Fluidzirkulation innerhalb des Grabens und der randlichen Vorbergzonen während des Känozoikums. Hierfür wurden Bohrungen des Grabeninneren und …
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Entwicklung und Anwendung eines Computerprogrammes zur numerischen Modellierung von Diffusionsprofilen in Mineralkörnern
… die thermische Subsidenz im Bereich des Anza-Grabens verursacht. Während oder nach der Abkühlung erfolgte eine Dekompression um ca. 0.3-0.8 GPa entsprechend einer Anhebung um ca. 9-24 km. Dieses Ereignis kann mit sehr jungen Extensionsbewegungen im Bereich des Anza-Grabens in Verbindung …
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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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Structural development of a volcanic sequence of the Lahn area during the Variscan orogeny in the Rhenohercynian Belt (Germany)
… 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 Kanapee anticline. The magnetofabric analysis is used to interpret the flow direction of sheet flow lavas which …
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Syntectonic deposition and paleohydrology of the spring-fed Hualapai Limestone and implications for 5-6 MA integration of the Colorado River system through Grand Canyon : evidence from sedimentology, geochemistry and detrital zircon analysis
… syntectonic deposition of the unit in half grabens formed above listric faults with 5-11 km depth to detachments. A sedimentary facies analysis highlights that the Hualapai Limestone was deposited in spring-fed lake and marsh systems fed by groundwater similar in composition to modern Havasu …
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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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Subsurface mapping and 3D flexural modeling of the Putumayo foreland basin, Colombia
… by inversion of older, Jurassic half-grabens during the late Miocene; 2) the 45-Km-wide, Central structural zone characterized by moderately-inverted Jurassic half-grabens; and 3) the 120-Km-wide, Eastern zone characterized by the 90-Km-wide, N-S trending Caquetá arch with a few …
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Sedimentology of the lower Uitenhage Group in the Middle to Late Mesozoic Oudtshoorn Basin, South Africa
… Basin and its relationship to the other Mesozoic grabens and half grabens of the southern Cape remain elusive.
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The origin of the Wilson Ridge pluton and its enclaves, northwestern Arizona: Implications for the generation of a calc-alkaline intermediate pluton in an extensional environment
… faulting resulted in a series of horsts and grabens that provide windows into deep structural levels of the pluton; The Wilson Ridge pluton is composed of the Teakettle Pass suite, comprised of foliated monzodiorite and quartz monzodiorite, and unfoliated quartz monzonite; and the older …
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The stratigraphy and structural evolution of the late Proterozoic Gariep belt in the Sendelingsdrif-Annisfontein area, northwestern Cape Province
… Formation). Rift faulting produced local grabens into which massflow sediments (Kaigas Formation) and volcaniclastics (Rosh Pinah Formation) were shed. During the sea-floor spreading stage, a shallow-water carbonateclastic unit, the Hilda Sequence, was deposited. Conglomerates, quartzites, …
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Halogen Oxides in the Mid-Latitudinal Planetary Boundary Layer
… zum einen durch die Topographie des Toten-Meer-Grabens, zum anderen durch die Meteorologie des Messortes bedingt war. Die Freisetzung reaktiven Broms aus Salzablagerungen entlang des Toten Meeres konnte als primäre Bromquelle identifiziert werden.
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Depositional conditions, stratigraphic evolution, and allo- and autogenic controls of lower Permian non-marine carbonate rocks, Lucaogou low-order cycle, Bogda Mountains, NW china
… graben consisted of several small-scale half grabens in the early Lucaogou time. This study improves understanding of sedimentation of lacustrine carbonate deposits in rift settings and stratigraphic evolution of lake and paleoclimatic condition of the study area during transition of Sakmarian …
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No Triassic structural control of the development of the Middle Ground Arch, Eastern Gulf of Mexico
… topographic highs are horsts and lows are grabens formed during NW-SE directed Triassic extension. This research uses 2-D seismic reflection data to analyze the southern boundary of a basement high, the Middle Ground Arch/Southern Platform, to determine if there is a fault present. The …
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Geology of the passive margin off New England
… Triassic produced a complex series of horsts and grabens in Precambrian/Paleozoic crust. Intra-rift sediments consist of clastics, evaporites, and volcanics. Continental separation occurred and sea-floor spreading began 195-190 my B.P. The boundary between "normal" continental crust and crust …
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Mesoproterozoic tectonic evolution of southwestern North America : protracted intracratonic deformation, sedimentation, and differential exhumation in Grand Canyon and the Rocky Mountain Region
… deformation involved the development of half grabens and full grabens that record NE-SW extension on NW-striking, high-angle normal faults. Several observations indicate that NW-striking normal faulting was concurrent with upper Unkar deposition, mafic magmatism, and early Nankoweap …
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Microfacies analysis of the lower paleocene beda formation in Western Concession 59 and Block 59F, Sirte Basin, Libya /
… The study area is marked by several horsts and grabens; as a result of extent ional tectonism. The area was tectonically active throughout the Tertiary period. Primary porosity is intergranular and intragranular, and secondary processes are characterized by dissolution, intercrystalline, …
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