FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2112863857> ?p ?o ?g. }

• W2112863857 abstract "We present a synthesis of the tectonics of the Hess Deep rift valley, equatorial East Pacific Rise (EPR), as deduced fromstructural, paleomagnetic, petrological, geochemical, and borehole geophysical data acquired during Ocean Drilling Program(ODP) Leg 147. These data show that the crustal section and underlying shallow mantle lithologies now exposed in Hess Deepwere formed by seafloor spreading at the north-south-trending EPR, were then transported eastward away from the EPR ridgeaxis, and became influenced by extensional tectonism caused by amagmatic rifting in advance of the westward-propagatingCocos-Nazca spreading center.Seawater influx into layer 3, the plutonic portion of the oceanic crust, commenced soon after crystallization, with pervasiveinflux of water along randomly oriented microfracture networks and grain boundaries, mostly at temperatures of 600°-750°C.This permeability was probably created by tensile brittle failure upon subsolidus cooling and thermal contraction of the gabbro,and must have been established within several tens of thousands of years after axial magma emplacement and within a few kilometersof the ridge axis. When the upper plutonic section had cooled to a temperature of ~450°C, probably a few tens of kilometersfrom the EPR axis and tens to a couple of hundred thousand years after axial magmatism, it became influenced by theeffects of Cocos-Nazca rifting, and a dense array of east-west tensile fractures developed. Widespread access of seawater tosub-Moho levels and consequent onset of serpentinization occurred at this time.The ODP drill sites are located on an intra-rift horst block in the north of Hess Deep, and previous workers had speculatedthat serpentinite diapirism was responsible for the differential uplift of this block. However, textural evidence from the drillcores suggests that serpentinization of the shallow mantle there was a predominantly static phenomenon; hence, exhumation ofthe lower crust and shallow mantle appears to have taken place by block faulting rather than incoherent diapirism. Uplift of theintra-rift ridge was accommodated on normal Cataclastic shear zones, which contain low-temperature mineral assemblages(150°-250°C), implying that uplift occurred at a relatively late stage.Paleomagnetic data from the drillsites, fully restored to geographical coordinates, show that the intra-rift ridge has sufferedsignificant tectonic rotation, with both a northward component of tilt and a counter-clockwise vertical-axis component of rotation.We do not have sufficient evidence to constrain unequivocally the axis or axes of rotation, but argue that compound rotationsare likely in such a complex tectonic setting. In conjunction with other geophysical evidence from the Hess Deep area, wetentatively conclude that a counter-clockwise vertical-axis tectonic rotation occurred at a very early stage, perhaps in the overlapbasin of the duelling propagators at 2°N on the EPR. At a later stage, and associated with the opening of the Hess Deep rift,northward tilting appears to have occurred (about a subhorizontal axis), as a result of rotational normal faulting above a southdippingdetachment surface. Later, post-detachment normal faulting was probably responsible for the isolation and differentialuplift of the intra-rift ridge." @default.
• W2112863857 created "2016-06-24" @default.
• W2112863857 creator A5042065911 @default.
• W2112863857 creator A5048828311 @default.
• W2112863857 creator A5078777403 @default.
• W2112863857 creator A5081841900 @default.
• W2112863857 date "1996-04-01" @default.
• W2112863857 modified "2023-10-16" @default.
• W2112863857 title "Tectonics of Hess Deep: A Synthesis of Drilling Results from Leg 147" @default.
• W2112863857 cites W148810477 @default.
• W2112863857 cites W1970111092 @default.
• W2112863857 cites W1975731696 @default.
• W2112863857 cites W1996831697 @default.
• W2112863857 cites W2002278475 @default.
• W2112863857 cites W2004758340 @default.
• W2112863857 cites W2018764474 @default.
• W2112863857 cites W2022415851 @default.
• W2112863857 cites W2024307163 @default.
• W2112863857 cites W2031342294 @default.
• W2112863857 cites W2032176215 @default.
• W2112863857 cites W2040146314 @default.
• W2112863857 cites W2045512583 @default.
• W2112863857 cites W2050686782 @default.
• W2112863857 cites W2056814211 @default.
• W2112863857 cites W2067533085 @default.
• W2112863857 cites W2068654805 @default.
• W2112863857 cites W2074143737 @default.
• W2112863857 cites W2077348829 @default.
• W2112863857 cites W2082791203 @default.
• W2112863857 cites W2105318533 @default.
• W2112863857 cites W2128996948 @default.
• W2112863857 cites W2151322670 @default.
• W2112863857 cites W2158925049 @default.
• W2112863857 cites W2292278295 @default.
• W2112863857 cites W2335579459 @default.
• W2112863857 cites W2414102396 @default.
• W2112863857 cites W2502313991 @default.
• W2112863857 cites W2760749965 @default.
• W2112863857 doi "https://doi.org/10.2973/odp.proc.sr.147.032.1996" @default.
• W2112863857 hasPublicationYear "1996" @default.
• W2112863857 type Work @default.
• W2112863857 sameAs 2112863857 @default.
• W2112863857 citedByCount "14" @default.
• W2112863857 countsByYear W21128638572012 @default.
• W2112863857 countsByYear W21128638572014 @default.
• W2112863857 countsByYear W21128638572015 @default.
• W2112863857 countsByYear W21128638572016 @default.
• W2112863857 countsByYear W21128638572020 @default.
• W2112863857 crossrefType "book-chapter" @default.
• W2112863857 hasAuthorship W2112863857A5042065911 @default.
• W2112863857 hasAuthorship W2112863857A5048828311 @default.
• W2112863857 hasAuthorship W2112863857A5078777403 @default.
• W2112863857 hasAuthorship W2112863857A5081841900 @default.
• W2112863857 hasBestOaLocation W21128638571 @default.
• W2112863857 hasConcept C127313418 @default.
• W2112863857 hasConcept C127413603 @default.
• W2112863857 hasConcept C151730666 @default.
• W2112863857 hasConcept C165205528 @default.
• W2112863857 hasConcept C25197100 @default.
• W2112863857 hasConcept C77928131 @default.
• W2112863857 hasConcept C78519656 @default.
• W2112863857 hasConceptScore W2112863857C127313418 @default.
• W2112863857 hasConceptScore W2112863857C127413603 @default.
• W2112863857 hasConceptScore W2112863857C151730666 @default.
• W2112863857 hasConceptScore W2112863857C165205528 @default.
• W2112863857 hasConceptScore W2112863857C25197100 @default.
• W2112863857 hasConceptScore W2112863857C77928131 @default.
• W2112863857 hasConceptScore W2112863857C78519656 @default.
• W2112863857 hasLocation W21128638571 @default.
• W2112863857 hasOpenAccess W2112863857 @default.
• W2112863857 hasPrimaryLocation W21128638571 @default.
• W2112863857 hasRelatedWork W2004013317 @default.
• W2112863857 hasRelatedWork W2022035173 @default.
• W2112863857 hasRelatedWork W2035325200 @default.
• W2112863857 hasRelatedWork W2092739438 @default.
• W2112863857 hasRelatedWork W2167517487 @default.
• W2112863857 hasRelatedWork W2355282060 @default.
• W2112863857 hasRelatedWork W2772196783 @default.
• W2112863857 hasRelatedWork W2933907707 @default.
• W2112863857 hasRelatedWork W3113596969 @default.
• W2112863857 hasRelatedWork W3141829427 @default.
• W2112863857 isParatext "false" @default.
• W2112863857 isRetracted "false" @default.
• W2112863857 magId "2112863857" @default.
• W2112863857 workType "book-chapter" @default.