Matches in SemOpenAlex for { <https://semopenalex.org/work/W128891504> ?p ?o ?g. }
Showing items 1 to 85 of
85
with 100 items per page.
- W128891504 abstract "During the Cretaceous break-up of Gondwana, the southern margin of South Africa developed as a consequence of the shear motion between the African and South American plate along the Agulhas-Falkland transform. This resulted in unique formations of the adjacent basins and may have an effect on lithospheric vertical motion processes of the southern African continent. As part of the German - South African Inkaba ye Africa project, the marine component of the onshore/offshore Agulhas-Karoo Geoscience Transect was surveyed in order to reveal the deep crustal structure along a corridor stretching from the Agulhas Plateau of the Indian Ocean, across the Agulhas-Falkland Fracture Zone (AFFZ) and across the basins of the continental shelf towards the South African southern coast. The main objectives include questions regarding (1) the continental or oceanic affinity of the Agulhas Plateau, (2) the characteristics of the continent-ocean boundary of the sheared margin, (3) the deep formation of the Outeniqua Basin and other basins, and (4) the evolution and possible neotectonic re-activation of the AFFZ. Along two sub-parallel deep seismic refraction and reflection profiles, we obtained detailed velocity-depth models from ocean-bottom seismometer (OBS). The models show crustal thicknesses from 30 km beneath the inner continental shelf and down to 7 km in the Agulhas Passage. P-wave velocities range from 5.6 to 6.6 km/s for the upper crust and from 6.4 to 7.1 km/s for the middle to lower crust. Uppermost mantle velocities are measured from 7.8 to 8.0 km/s. A continent-ocean transition extends over a width of about 50 km at the location of the Agulhas-Falkland Fracture Zone. Beneath the southern Outeniqua Basin and the Diaz Marginal Ridge, an up to 3 km thick zone of relatively low velocities is discovered in the upper crust, which is interpreted as an older foreland basin filled with pre-breakup metasediments. Our model suggests that the evolution of the Diaz Marginal Ridge is connected to the later history of this old basin. In the Agulhas Passage, almost no stratified sediment cover exists due to strong erosion by ocean currents. Alternating layers of volcanic flows and sediments with a mean velocity of about 4 km/s can be identified. These volcanic flows seem to have accompanied a possible re-activation of parts of the Agulhas-Falkland Fracture Zone along the sheared margin." @default.
- W128891504 created "2016-06-24" @default.
- W128891504 creator A5023373241 @default.
- W128891504 creator A5028912763 @default.
- W128891504 creator A5056867134 @default.
- W128891504 date "2007-01-01" @default.
- W128891504 modified "2023-09-27" @default.
- W128891504 title "The Agulhas-Karoo Geoscience Transect: tectonic processes along the sheared South African continental margin" @default.
- W128891504 hasPublicationYear "2007" @default.
- W128891504 type Work @default.
- W128891504 sameAs 128891504 @default.
- W128891504 citedByCount "0" @default.
- W128891504 crossrefType "journal-article" @default.
- W128891504 hasAuthorship W128891504A5023373241 @default.
- W128891504 hasAuthorship W128891504A5028912763 @default.
- W128891504 hasAuthorship W128891504A5056867134 @default.
- W128891504 hasConcept C111368507 @default.
- W128891504 hasConcept C117485682 @default.
- W128891504 hasConcept C119477230 @default.
- W128891504 hasConcept C12294951 @default.
- W128891504 hasConcept C127313418 @default.
- W128891504 hasConcept C134306372 @default.
- W128891504 hasConcept C141646446 @default.
- W128891504 hasConcept C151730666 @default.
- W128891504 hasConcept C154200439 @default.
- W128891504 hasConcept C165205528 @default.
- W128891504 hasConcept C16942324 @default.
- W128891504 hasConcept C184751465 @default.
- W128891504 hasConcept C201867031 @default.
- W128891504 hasConcept C20364790 @default.
- W128891504 hasConcept C2776698055 @default.
- W128891504 hasConcept C2778677506 @default.
- W128891504 hasConcept C2780030769 @default.
- W128891504 hasConcept C2781148125 @default.
- W128891504 hasConcept C33923547 @default.
- W128891504 hasConcept C58097730 @default.
- W128891504 hasConcept C77928131 @default.
- W128891504 hasConceptScore W128891504C111368507 @default.
- W128891504 hasConceptScore W128891504C117485682 @default.
- W128891504 hasConceptScore W128891504C119477230 @default.
- W128891504 hasConceptScore W128891504C12294951 @default.
- W128891504 hasConceptScore W128891504C127313418 @default.
- W128891504 hasConceptScore W128891504C134306372 @default.
- W128891504 hasConceptScore W128891504C141646446 @default.
- W128891504 hasConceptScore W128891504C151730666 @default.
- W128891504 hasConceptScore W128891504C154200439 @default.
- W128891504 hasConceptScore W128891504C165205528 @default.
- W128891504 hasConceptScore W128891504C16942324 @default.
- W128891504 hasConceptScore W128891504C184751465 @default.
- W128891504 hasConceptScore W128891504C201867031 @default.
- W128891504 hasConceptScore W128891504C20364790 @default.
- W128891504 hasConceptScore W128891504C2776698055 @default.
- W128891504 hasConceptScore W128891504C2778677506 @default.
- W128891504 hasConceptScore W128891504C2780030769 @default.
- W128891504 hasConceptScore W128891504C2781148125 @default.
- W128891504 hasConceptScore W128891504C33923547 @default.
- W128891504 hasConceptScore W128891504C58097730 @default.
- W128891504 hasConceptScore W128891504C77928131 @default.
- W128891504 hasLocation W1288915041 @default.
- W128891504 hasOpenAccess W128891504 @default.
- W128891504 hasPrimaryLocation W1288915041 @default.
- W128891504 hasRelatedWork W1669516193 @default.
- W128891504 hasRelatedWork W1990706512 @default.
- W128891504 hasRelatedWork W2043827840 @default.
- W128891504 hasRelatedWork W2047478481 @default.
- W128891504 hasRelatedWork W2069231351 @default.
- W128891504 hasRelatedWork W2098542508 @default.
- W128891504 hasRelatedWork W2140538827 @default.
- W128891504 hasRelatedWork W2159190771 @default.
- W128891504 hasRelatedWork W2161650872 @default.
- W128891504 hasRelatedWork W2240461719 @default.
- W128891504 hasRelatedWork W2248007556 @default.
- W128891504 hasRelatedWork W2274063526 @default.
- W128891504 hasRelatedWork W2295749833 @default.
- W128891504 hasRelatedWork W23066318 @default.
- W128891504 hasRelatedWork W2772514664 @default.
- W128891504 hasRelatedWork W2884831991 @default.
- W128891504 hasRelatedWork W2971482006 @default.
- W128891504 hasRelatedWork W2978312660 @default.
- W128891504 hasRelatedWork W3161716668 @default.
- W128891504 hasRelatedWork W94019021 @default.
- W128891504 isParatext "false" @default.
- W128891504 isRetracted "false" @default.
- W128891504 magId "128891504" @default.
- W128891504 workType "article" @default.