FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3163114954> ?p ?o ?g. }

• W3163114954 abstract "&lt;p&gt;Cameroon Volcanic Line (CVL) is located in the western part of equatorial Africa and consists of volcanoes which were active from Eocene to recent, stretching ca. 1700 km from the Atlantic in the SW into the African continent in the NE. The continental part of the CVL is located on the Neoproterozoic Central African Orogenic Belt and is situated between the Congo craton and Sahara/Western Africa craton. Mantle peridotite xenoliths which occur locally in lavas of the CVL come from the spinel facies only, suggesting a relatively shallow lithosphere-asthenosphere boundary (LAB). This is supported by seismic studies, showing the LAB at 90-100 km.&lt;/p&gt;&lt;p&gt;In order to understand better the evolution of the lithospheric mantle beneath the CVL, we studied xenolith suite (16 xenoliths) from Befang in the Oku Massif (Tedonkenfack et al., submitted). The Befang xenoliths are almost entirely lherzolites which have cataclastic to weakly porphyroclastic texture. Harzburgites and websterites occur subordinately. Spinel is interstitial and has amoeboidal shape. The studied peridotites (14 lherzolites, 1 harzburgite) consist of minerals with almost constant composition (olivine Fo&lt;sub&gt;88.7-90.3&lt;/sub&gt;, orthopyroxene Al 0.17-0.19 atoms per formula unit (a pfu), clinopyroxene Al 0.28-0.30 a pfu, spinel Cr# dominantly 0.09-0.11). Spinel of Cr# 0.15 occurs in one of the lherzolites, whereas that occurring in harzburgite has Cr# 0.19. Clinopyroxene REE patterns are similar to those of Depleted MORB Mantle (DMM) except LREEs, which vary from depleted to enriched. The A-type olivine fabric occurs in the EBSD-studied subset of 8 samples (one harzburgite and 7 lherzolites). Orthopyroxene shows deformation consistent with olivine. The fabric of LREE-enriched clinopyroxene is equivalent to those of orthopyroxene and olivine, whereas spinel and LREE-depleted clinopyroxene are oriented independently of the fabric of host rock.&lt;/p&gt;&lt;p&gt;These data, thermometry, phase relationships and phase equilibria diagrams suggest that the Befang mantle section was refertilised by MORB-like melt at pressures 1.0-1.4 GPa and temperatures slightly above 1200 &amp;#8211; 1275 &amp;#186;C. The olivine-orthopyroxene framework and LREE-enriched clinopyroxene preserve the fabric of protolith. On the other hand, the LREE-depleted clinopyroxene shows discordant orientation relative to olivine-orthopyroxene protolith framework, and amoeboidal spinel crystallized from the melt. The major element and REEs composition of pyroxenes occurring in the Befang peridotites indicate chemical reequilibration at temperatures 930 &amp;#8211; 1000 &amp;#186;C. Trace element modeling shows that websterites can be linked to Cenozoic volcanism. We speculate that they form veins in the lithospheric mantle. Our study therefore supports the origin of fertile SCLM via refertilization rather than by extraction of small melt fractions, and further emphasizes the involvement of depleted melts in this process, which contrasts with the incompatible element-enriched melts typically invoked in within-plate settings.&lt;/p&gt;&lt;p&gt;This study originated thanks to the project of Polish National Centre of Research NCN 2017/27/B/ST10/00365 to JP. The bilateral Austrian-Polish project WTZ PL 08/2018 enabled extensive microprobe work.&lt;/p&gt;&lt;p&gt;References:&lt;/p&gt;&lt;p&gt;Tedonkenfack SST, Puziewicz J, Aulbach S, Ntaflos T., Kaczmarek M-A, Matusiak-Ma&amp;#322;ek M, Kuku&amp;#322;a A, Ziobro M: Lithospheric mantle refertilization by DMM-derived melts beneath the Cameroon Volcanic Line &amp;#8211; a case study of the Befang xenolith suite (Oku Volcanic Group, Cameroon). Submitted.&lt;/p&gt;" @default.
• W3163114954 created "2021-05-24" @default.
• W3163114954 creator A5008453249 @default.
• W3163114954 creator A5009394905 @default.
• W3163114954 creator A5026195887 @default.
• W3163114954 creator A5051765083 @default.
• W3163114954 creator A5060652929 @default.
• W3163114954 creator A5082639568 @default.
• W3163114954 creator A5084184943 @default.
• W3163114954 creator A5086407568 @default.
• W3163114954 date "2021-03-03" @default.
• W3163114954 modified "2023-09-25" @default.
• W3163114954 title "Evolution of lithospheric mantle beneath mobile belt between two cratons: An example from the Oku Massif, Cameroon Volcanic Line (W Africa)" @default.
• W3163114954 doi "https://doi.org/10.5194/egusphere-egu21-1670" @default.
• W3163114954 hasPublicationYear "2021" @default.
• W3163114954 type Work @default.
• W3163114954 sameAs 3163114954 @default.
• W3163114954 citedByCount "0" @default.
• W3163114954 crossrefType "posted-content" @default.
• W3163114954 hasAuthorship W3163114954A5008453249 @default.
• W3163114954 hasAuthorship W3163114954A5009394905 @default.
• W3163114954 hasAuthorship W3163114954A5026195887 @default.
• W3163114954 hasAuthorship W3163114954A5051765083 @default.
• W3163114954 hasAuthorship W3163114954A5060652929 @default.
• W3163114954 hasAuthorship W3163114954A5082639568 @default.
• W3163114954 hasAuthorship W3163114954A5084184943 @default.
• W3163114954 hasAuthorship W3163114954A5086407568 @default.
• W3163114954 hasConcept C127313418 @default.
• W3163114954 hasConcept C13495919 @default.
• W3163114954 hasConcept C147717901 @default.
• W3163114954 hasConcept C151730666 @default.
• W3163114954 hasConcept C160776313 @default.
• W3163114954 hasConcept C167919410 @default.
• W3163114954 hasConcept C16942324 @default.
• W3163114954 hasConcept C17409809 @default.
• W3163114954 hasConcept C2780364934 @default.
• W3163114954 hasConcept C42796848 @default.
• W3163114954 hasConcept C5900021 @default.
• W3163114954 hasConcept C67236022 @default.
• W3163114954 hasConcept C77928131 @default.
• W3163114954 hasConcept C84372278 @default.
• W3163114954 hasConceptScore W3163114954C127313418 @default.
• W3163114954 hasConceptScore W3163114954C13495919 @default.
• W3163114954 hasConceptScore W3163114954C147717901 @default.
• W3163114954 hasConceptScore W3163114954C151730666 @default.
• W3163114954 hasConceptScore W3163114954C160776313 @default.
• W3163114954 hasConceptScore W3163114954C167919410 @default.
• W3163114954 hasConceptScore W3163114954C16942324 @default.
• W3163114954 hasConceptScore W3163114954C17409809 @default.
• W3163114954 hasConceptScore W3163114954C2780364934 @default.
• W3163114954 hasConceptScore W3163114954C42796848 @default.
• W3163114954 hasConceptScore W3163114954C5900021 @default.
• W3163114954 hasConceptScore W3163114954C67236022 @default.
• W3163114954 hasConceptScore W3163114954C77928131 @default.
• W3163114954 hasConceptScore W3163114954C84372278 @default.
• W3163114954 hasLocation W31631149541 @default.
• W3163114954 hasOpenAccess W3163114954 @default.
• W3163114954 hasPrimaryLocation W31631149541 @default.
• W3163114954 hasRelatedWork W174941 @default.
• W3163114954 hasRelatedWork W3700018 @default.
• W3163114954 hasRelatedWork W40854571 @default.
• W3163114954 hasRelatedWork W42741335 @default.
• W3163114954 hasRelatedWork W57702695 @default.
• W3163114954 hasRelatedWork W85407548 @default.
• W3163114954 hasRelatedWork W91545660 @default.
• W3163114954 hasRelatedWork W93469224 @default.
• W3163114954 hasRelatedWork W93660986 @default.
• W3163114954 hasRelatedWork W8483186 @default.
• W3163114954 isParatext "false" @default.
• W3163114954 isRetracted "false" @default.
• W3163114954 magId "3163114954" @default.
• W3163114954 workType "article" @default.