Showing papers in "Marine and Petroleum Geology in 2005"

TL;DR: The Storegga Slide occurred 8200 years ago and was the last megaslide in this region where similar slides have occurred with intervals of approximately 100 ky since the onset of continental shelf glaciations at 0.5 Ma.

TL;DR: The Storegga slide was released in an area where the average slope inclination is in the order of 0.6-0.7° as discussed by the authors. And the morphology of the upper part of the slide scar shows lateral spreads along marine clay layers indicating a retrogressive slide mechanism.

TL;DR: The current atmospheric CH 4 budget does not take into account geologically-sourced CH 4 seepage as discussed by the authors, which is the most abundant organic compound in the Earth's atmosphere, where it acts as a greenhouse gas and thus has implications for global climate change.

TL;DR: In this paper, detailed morphological investigations and a dating program have been performed to reveal the slide process and the timing of the slide, based on a comprehensive database, and detailed analyses of 89 cores within the Storegga Slide region have been undertaken.

TL;DR: In this article, the impact of the Pleistocene glacial impact on the NW European margin from Ireland to Svalbard (between c. 48°N-80°N) is investigated.

TL;DR: The sensitivity of oceanic gas hydrates and submarine slope stability to the combined forcing of sea level changes and bottom water perturbation is a critical issue for risk assessment in the Storegga Slide area on the mid-Norwegian margin this article.

TL;DR: A good agreement was obtained for a retrogressive slide that descends at 25-30m/s, and that has short time lags of 15-20 s between each individual slide-block as mentioned in this paper.

TL;DR: The relationship between near-surface hydrocarbon seepage and subsurface petroleum generation and entrapment is often complex as discussed by the authors, which is the best method of sampling and analysis to detect hydrocarbon leakage effectively.

TL;DR: In this article, the authors investigated seven large pre-Holocene slides on the mid-Norwegian continental margin between 62 and 67°N and found that most of the slides are located in the area of the Holocene Storegga Slide and in the North Sea Fan.

TL;DR: In this article, a very dense grid of Very High Resolution (VHR) seismic reflection (Sparker) data associated with surficial cores was collected by IFREMER between 1992 and 2001 on the outer shelf and upper slope offshore of Sete in the Languedoc region.

TL;DR: In this paper, the authors defined a hybrid petroleum system for the northwest margin of the Junggar Basin, by documenting the complexity in its formation and evolution, and showed that the three source rocks charged reservoirs mainly in three geologic intervals, with common mixing of oils from different sources and/or with different maturities.

TL;DR: The Naust Formation as discussed by the authors is defined as the most extensive part of the More shelf, and it consists of more than 1000m of sediments in extensive areas, including the Storegga Slide and older slides.

TL;DR: In the South China Sea, a very light carbon isotopic composition (51.25 to 51.76 parts per thousand) suggests that their carbon was derived from microbial methane oxidization as discussed by the authors.

TL;DR: In this article, a regional correlation of Neogene stratigraphy has been attempted along and across the NW European Atlantic continental margin, between Mid-Norway and SW Ireland, and two unconformity-bounded successions are recognized.

TL;DR: In this article, the authors used bottom simulating reflectors (BSRs) and geochemical anomalies which indicate the existence of gas hydrates have been recognized in sediments of the Xisha Trough, the Dongsha Rise and the accretionary wedge of the Manila subduction zone.

TL;DR: In this article, the Cenozoic history of post-rift vertical movements along the NW European margin, from Ireland to mid-Norway, is examined by integrating published analyses of uplift and subsidence with higher resolution tectono-stratigraphic indicators of relative movements.

TL;DR: In this article, it was shown that seafloor wedges commonly display gently inclined seaward prograding clinoforms, and transparent to chaotic internal acoustic facies, and the resulting stratal stacking pattern can be attributed to a combination of variations in sediment supply, sedimentary processes, and accommodation space.

TL;DR: The Ordos Basin is a typical lapped basin, including three sequences of strata: early Paleozoic, late Mesozoic and early Permian, with a total thickness of 4000-6000m as discussed by the authors.

TL;DR: A detailed morphological analysis of the outer shelf and continental slope of the Western Gulf of Lion is presented, based on swath bathymetry data together with sub-bottom profiles and high resolution seismic reflection profiles as mentioned in this paper.

TL;DR: In this paper, high-resolution seismic data have been used to study the ice-stream-fed North Sea Fan, deposited from approximately Marine Isotope Stage (MIS) 12 and onwards.

TL;DR: Based on studies of sediment accumulations deposited from-and erode by-alongslope flowing ocean currents on the European continental margin from Porcupine (Ireland) to Lofoten (Norway), the evolution of the Cenozoic paleocirculation was reconstructed as part of the STRATAGEM project as mentioned in this paper.

TL;DR: In this article, a numerical model supplemented by an analytical one was used to analyze the tsunami potential for the Ormen Lange gas field off Western Norway by using a submarine slide model.

TL;DR: In this paper, a detailed chronostratigraphy of the post-slide sediments in the Storegga area is presented, showing relatively constant high sedimentation rates in the order of 1-2 m/ky during the last 8000 years.

TL;DR: In this paper, a rheological model based on a Bingham fluid with a history dependent yield strength and consistency is presented for the last phase of the Storegga Slide as it reached today's upper headwall.

TL;DR: In this paper, individual pairs of frequency factors and activation energies were calculated from the temperature shift of nine different levels of organic matter transformation ranging from 0.1 to 0.9 TR at different heating rates (0.1, 0.7 and 5.0 K/min).

TL;DR: Expressions of gas seepage observable within North Sea seismic and acoustic data include seabed pockmarks, seepages plumes in the water column, acoustic blanking, shallow enhanced reflectors, and shallow seismic chimneys.

TL;DR: A great effort has been undertaken to investigate potential geohazards in relation to the development of the Ormen Lange gas field offshore Mid-Norway as mentioned in this paper, which is located in the scar left after the giant, tsunami-generating Storegga Slide, which occurred roughly 8150 years ago.

TL;DR: In this article, a dynamical enigma of the Storegga slide was investigated and it was shown that if one simulates the flow of the giant slide with simple non-Newtonian soil properties constant along the path, extremely small yield strength must be attributed to the material.

TL;DR: A number of pre-Holocene submarine mass-failure events of various sizes have been recognized within the Plio-Pleistocene succession along the European margin from Lofoten to Porcupine.

TL;DR: In this article, a high-resolution reflection seismic data image for the first time showed the entire lateral succession of gravity gliding-related features as they were suggested by analog models and demonstrate therewith the validity of those models for the Messinian evaporites.