Matches in SemOpenAlex for { <https://semopenalex.org/work/W2008232389> ?p ?o ?g. }
Showing items 1 to 89 of
89
with 100 items per page.
- W2008232389 endingPage "49" @default.
- W2008232389 startingPage "35" @default.
- W2008232389 abstract "New observations on the morphostructure, eruptive characteristics and intrusive system of Tristan da Cunha, an active intraplate volcano of predominantly trachybasaltic composition, are combined with previously published data to arrive at a model of its internal structure. Volcanic activity on the island of Tristan da Cunha is characterized by a dual (central and lateral) feeding system. The central activity occurred at the summit, presumably on top of an axial magma column. The eruptions produced small flows as well as a high percentage of pyroclastic deposits partly of hydrovolcanic origin. The basaltic magma probably encountered a shallow water table or ephemeral crater lakes. These pyroclastic products contributed in large part to the building up of a well-developed central cone. From the column a dense swarm of radial dykes were generated by hydraulic fracturing. In contrast, the lateral activity occurred on a much lower level on the flanks of the volcano. The style of eruption was strombolian resulting in scoria cones and flows. There is a concentration of strombolian vents around the base of the central cone. This concentric pattern is ascribed to conical shear planes in depth created by uplift of the roof of the magma chamber. The uplift may have contributed to the elevation of the central cone. In addition, a number of lateral vents occur along radial fractures that appear to be concentrated along two tectonic axes oriented N170°E and N80°E. These directions are parallel to the compressive axes of the stress field in the ocean floor. The most prominent axis (N170°E) connects the two most recent eruptions of rather unusual (trachyandesitic, entirely effusive) character. Segmented en échelon dykes and fissures observed in plan and in vertical cliffs are related to slope instability. When a dyke propagates to the surface it enters a zone of bimodal stress: extension and shearing as a result of downslope movement. Under such conditions en échelon segmentation of the dyke takes place." @default.
- W2008232389 created "2016-06-24" @default.
- W2008232389 creator A5053699769 @default.
- W2008232389 creator A5062819004 @default.
- W2008232389 date "1987-12-01" @default.
- W2008232389 modified "2023-09-23" @default.
- W2008232389 title "A dynamic interpretation of Tristan da Cunha volcano, South Atlantic Ocean" @default.
- W2008232389 cites W1979397668 @default.
- W2008232389 cites W1979893508 @default.
- W2008232389 cites W1980201701 @default.
- W2008232389 cites W1987241770 @default.
- W2008232389 cites W1989722557 @default.
- W2008232389 cites W1990690341 @default.
- W2008232389 cites W1994838120 @default.
- W2008232389 cites W2004758340 @default.
- W2008232389 cites W2022638035 @default.
- W2008232389 cites W2038237246 @default.
- W2008232389 cites W2040171614 @default.
- W2008232389 cites W2063684278 @default.
- W2008232389 cites W2069419430 @default.
- W2008232389 cites W2078735530 @default.
- W2008232389 cites W2079536474 @default.
- W2008232389 cites W2082470368 @default.
- W2008232389 cites W2082872481 @default.
- W2008232389 cites W2084091793 @default.
- W2008232389 cites W2102743661 @default.
- W2008232389 cites W2136804653 @default.
- W2008232389 cites W2139810383 @default.
- W2008232389 cites W2147154292 @default.
- W2008232389 cites W2319682974 @default.
- W2008232389 doi "https://doi.org/10.1016/0377-0273(87)90091-6" @default.
- W2008232389 hasPublicationYear "1987" @default.
- W2008232389 type Work @default.
- W2008232389 sameAs 2008232389 @default.
- W2008232389 citedByCount "15" @default.
- W2008232389 countsByYear W20082323892018 @default.
- W2008232389 countsByYear W20082323892020 @default.
- W2008232389 crossrefType "journal-article" @default.
- W2008232389 hasAuthorship W2008232389A5053699769 @default.
- W2008232389 hasAuthorship W2008232389A5062819004 @default.
- W2008232389 hasConcept C114793014 @default.
- W2008232389 hasConcept C120806208 @default.
- W2008232389 hasConcept C121332964 @default.
- W2008232389 hasConcept C127313418 @default.
- W2008232389 hasConcept C1276947 @default.
- W2008232389 hasConcept C153588837 @default.
- W2008232389 hasConcept C165205528 @default.
- W2008232389 hasConcept C179537507 @default.
- W2008232389 hasConcept C183222429 @default.
- W2008232389 hasConcept C193229666 @default.
- W2008232389 hasConcept C55266288 @default.
- W2008232389 hasConcept C55953714 @default.
- W2008232389 hasConcept C5900021 @default.
- W2008232389 hasConcept C95869378 @default.
- W2008232389 hasConceptScore W2008232389C114793014 @default.
- W2008232389 hasConceptScore W2008232389C120806208 @default.
- W2008232389 hasConceptScore W2008232389C121332964 @default.
- W2008232389 hasConceptScore W2008232389C127313418 @default.
- W2008232389 hasConceptScore W2008232389C1276947 @default.
- W2008232389 hasConceptScore W2008232389C153588837 @default.
- W2008232389 hasConceptScore W2008232389C165205528 @default.
- W2008232389 hasConceptScore W2008232389C179537507 @default.
- W2008232389 hasConceptScore W2008232389C183222429 @default.
- W2008232389 hasConceptScore W2008232389C193229666 @default.
- W2008232389 hasConceptScore W2008232389C55266288 @default.
- W2008232389 hasConceptScore W2008232389C55953714 @default.
- W2008232389 hasConceptScore W2008232389C5900021 @default.
- W2008232389 hasConceptScore W2008232389C95869378 @default.
- W2008232389 hasIssue "1-2" @default.
- W2008232389 hasLocation W20082323891 @default.
- W2008232389 hasOpenAccess W2008232389 @default.
- W2008232389 hasPrimaryLocation W20082323891 @default.
- W2008232389 hasRelatedWork W1998013984 @default.
- W2008232389 hasRelatedWork W2008232389 @default.
- W2008232389 hasRelatedWork W2016471622 @default.
- W2008232389 hasRelatedWork W2057940187 @default.
- W2008232389 hasRelatedWork W2066276589 @default.
- W2008232389 hasRelatedWork W2070192581 @default.
- W2008232389 hasRelatedWork W2395105090 @default.
- W2008232389 hasRelatedWork W2791126230 @default.
- W2008232389 hasRelatedWork W4283031299 @default.
- W2008232389 hasRelatedWork W4293583376 @default.
- W2008232389 hasVolume "34" @default.
- W2008232389 isParatext "false" @default.
- W2008232389 isRetracted "false" @default.
- W2008232389 magId "2008232389" @default.
- W2008232389 workType "article" @default.