Results 251 to 260 of about 3,823,388 (289)

Gas Hydrates at Two Sites of an Active Continental Margin

Proceedings of SPE California Regional Meeting, 1985
ABSTRACT Sediment containing gas hydrates from two distant Deep Sea Drilling Project sites (565 and 568), located about 670 km apart or the landward flank of the Middle America Trench, was studied to determine the geochemical conditions that characterize the occurrence of gas hydrates.
openaire   +1 more source

Active Continental Margins and Island Arcs

1974
Certain regions of the earth are characterized by unusually high geophysical and geological activity, exemplified by deep earthquakes, volcanism, and mountain building. These regions form two fairly continuous belts, one around the Pacific Ocean (Fig. 1), the other extending through Asia to the Mediterranean Ocean.
openaire   +1 more source

Morphology of turbidite systems within an active continental margin (the Palomares Margin, western Mediterranean)

Geomorphology, 2014
Abstract The Palomares Margin, an NNE–SSW segment of the South Iberian Margin located between the Alboran and the Algerian–Balearic basins, is dissected by two major submarine canyon systems: the Gata (in the South) and the Alias–Almanzora (in the North). New swath bathymetry, side-scan sonar images, accompanied by 5 kHz and TOPAS subbottom profiles,
S. Perez-Hernandez, M.C. Comas, C. Escutia   +2 more
openaire   +1 more source

Neotectonic Activity of Atlantic Inner Continental Margin: ABSTRACT

AAPG Bulletin, 1981
ABSTRACT A consistent pattern of neotectonic activity along the inner edge of the Atlantic continental margin is emerging from new data on earthquake activity, contemporary vertical movement and geologic structure. Seismic activity, as shown by both historic and instrumental data, is concentrated in embayments on the Atlantic coastal ...
openaire   +1 more source

Rift, Magmatic Activization, and Continental Margin Regimes

1980
The rift regime is similar to the orogenic and is sometimes considered a variety of the latter. A number of specific features, however, lead us to classify it in an autonomous category.
openaire   +1 more source

Evolution of an active continental margin as exemplified by the Alpine history of the Caucasus

Tectonophysics, 1977
Abstract A plate-tectonics model of the Alpine evolution of the Caucasus is suggested. According to the model, in the Jurassic-Neocomian the Caucasian territory comprised the shelf of the East European platform, the marginal sea of the Great Caucasus, the Pontian-Transcaucasian island arc, the Anatolian-Minor Caucasian oceanic basin (Tethys) and the ...
Sh.A. Adamia, M.B. Lordkipanidze, G.S. Zakariadze   +2 more
openaire   +1 more source

Distribution of Oil and Gas on Active Continental Margins: ABSTRACT

AAPG Bulletin, 1984
Accumulation of oil and gas in an area depends on amount and type of organic matter, adequate temperatures for generation, suitable trapping configuration, and correct timing of events. All these factors can vary considerably across active margins of both island arc and continental (Andean) type.
openaire   +1 more source

Structural variability at the active continental marginoff southernmost Chile

Journal of Geodynamics, 1999
Abstract Newly collected seismic reflection data offshore Southernmost Chile, between 54°Sand 57°S, reveal the complex tectonic setting of this active continental margin. This region is stillpoorly known, because frequent bad weather conditions among these latitudes have prevented theacquisition of geological and geophysical data.
POLONIA A., BRANCOLINI G., TORELLI, Luigi, VERA E.   +3 more
openaire   +2 more sources

Composition and density model of the continental crust at an active continental margin—the Central Andes between 21° and 27°S

Tectonophysics, 2001
This paper derives an estimate of the average chemical composition of the Paleozoic Andean basement, based on the geological evolution and from compilations of geochemical and isotopic analyses of Early to Late Paleozoic age metamorphic and magmatic rocks between 21° and 27°S. Geochemical and isotopic data indicate that recycling of the Early Paleozoic
Lucassen, F., Becchio, R., Harmon, R., Kasemann, S., Franz, G., Trumbull, R., Wilke, H., Romer, R., Dulski, P.   +8 more
openaire   +3 more sources

Movement of lithospheric plates relative to subduction zones: Formation of marginal seas and active continental margins

Tectonophysics, 1981
Abstract Subduction zones with deep seismicity are believed to be associated with the descending branches of convective flows in the mantle and are subordinated to them. Therefore, the position of subduction zones can be considered as relatively fixed with respect to the steady-state system of convective flows.
Lev P. Zonenshain, Leonid A. Savostin
openaire   +1 more source