FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2049586219> ?p ?o ?g. }

• W2049586219 endingPage "80" @default.
• W2049586219 startingPage "63" @default.
• W2049586219 abstract "Nine samples of metavolcanic rock from the lower parts of greenstone belts in central French Guiana (the Paramaca series) and 14 granitic samples from the intrusive gneisses (the Degrad Roche and Arawa gneisses) were selected for Sm—Nd and Rb—Sr analysis. The Sm—Nd results from the metavolcanic series (including two tholeiites, five peridotitic komatiites and two andesites) yield an isochron age of 2.11±0.09 (2 σ) Ga with an initial 143Nd144Nd ratio (INd) of 0.51002±9 (2 σ), corresponding to ϵNd(T) = + 2.1 ± 1.8. This isochron is interpreted as representing the age of initial volcanism of the Paramaca series. Acid intrusives were dated by the Rb—Sr method. A whole rock Rb—Sr isochron, including data points from both the Degrad Roche and Arawa gneisses, yields an age of 2.00±0.07 (2 σ) Ga with initial 87Sr86Sr ratio (ISr value) of 0.7019±4 (2 σ). This result is considered to be the time of emplacement of the orthogneiss protoliths. The positive εNd value (+ 2.1 ± 1.8) obtained from the metavolcanic rocks of French Guiana suggests that their mantle sources have evolved in reservoirs slightly depleted in Light Rare Earth Elements (LREE). This result confirms the possible existence of ancient LREE-depleted reservoirs within the lower Proterozoic mantle. Moreover, the high εNd(T) value for these rocks excludes any significant crustal contamination during magma genesis. The French Guianese orthogneisses yield a low ISr value (0.7019±4 (2 σ)) which, together with geochemical considerations, suggests that their granitic protoliths could have originated by partial melting of short-lived crustal precursors of basaltic to granodioritic composition. The present geochronological and isotopic study suggests that the Guiana Shield may represent a major continental accretion event during the lower Proterozoic." @default.
• W2049586219 created "2016-06-24" @default.
• W2049586219 creator A5003558233 @default.
• W2049586219 creator A5013106573 @default.
• W2049586219 creator A5048936861 @default.
• W2049586219 creator A5058183006 @default.
• W2049586219 creator A5086046518 @default.
• W2049586219 date "1985-08-01" @default.
• W2049586219 modified "2023-10-16" @default.
• W2049586219 title "Rb—Sr and Sm—Nd geochronology of lower Proterozoic granite—greenstone terrains in French Guiana, South America" @default.
• W2049586219 cites W1592992906 @default.
• W2049586219 cites W1971513400 @default.
• W2049586219 cites W1983981277 @default.
• W2049586219 cites W1984351151 @default.
• W2049586219 cites W1984643778 @default.
• W2049586219 cites W1992273984 @default.
• W2049586219 cites W2000463371 @default.
• W2049586219 cites W2018984275 @default.
• W2049586219 cites W2021020558 @default.
• W2049586219 cites W2025684174 @default.
• W2049586219 cites W2026412695 @default.
• W2049586219 cites W2047364329 @default.
• W2049586219 cites W2062427830 @default.
• W2049586219 cites W2069227162 @default.
• W2049586219 cites W2074212603 @default.
• W2049586219 cites W2084938368 @default.
• W2049586219 cites W2090257129 @default.
• W2049586219 cites W2092251103 @default.
• W2049586219 cites W2092883749 @default.
• W2049586219 cites W2101782242 @default.
• W2049586219 cites W2315764237 @default.
• W2049586219 cites W2975091610 @default.
• W2049586219 cites W4245770643 @default.
• W2049586219 doi "https://doi.org/10.1016/0301-9268(85)90029-4" @default.
• W2049586219 hasPublicationYear "1985" @default.
• W2049586219 type Work @default.
• W2049586219 sameAs 2049586219 @default.
• W2049586219 citedByCount "84" @default.
• W2049586219 countsByYear W20495862192013 @default.
• W2049586219 countsByYear W20495862192014 @default.
• W2049586219 countsByYear W20495862192016 @default.
• W2049586219 countsByYear W20495862192018 @default.
• W2049586219 countsByYear W20495862192019 @default.
• W2049586219 countsByYear W20495862192020 @default.
• W2049586219 countsByYear W20495862192021 @default.
• W2049586219 countsByYear W20495862192022 @default.
• W2049586219 crossrefType "journal-article" @default.
• W2049586219 hasAuthorship W2049586219A5003558233 @default.
• W2049586219 hasAuthorship W2049586219A5013106573 @default.
• W2049586219 hasAuthorship W2049586219A5048936861 @default.
• W2049586219 hasAuthorship W2049586219A5058183006 @default.
• W2049586219 hasAuthorship W2049586219A5086046518 @default.
• W2049586219 hasConcept C112764850 @default.
• W2049586219 hasConcept C127313418 @default.
• W2049586219 hasConcept C149347711 @default.
• W2049586219 hasConcept C151730666 @default.
• W2049586219 hasConcept C161509811 @default.
• W2049586219 hasConcept C171701179 @default.
• W2049586219 hasConcept C173776410 @default.
• W2049586219 hasConcept C17409809 @default.
• W2049586219 hasConcept C202746551 @default.
• W2049586219 hasConcept C26687426 @default.
• W2049586219 hasConcept C46381822 @default.
• W2049586219 hasConcept C487381 @default.
• W2049586219 hasConcept C5900021 @default.
• W2049586219 hasConcept C67236022 @default.
• W2049586219 hasConcept C77928131 @default.
• W2049586219 hasConcept C93033518 @default.
• W2049586219 hasConcept C95628711 @default.
• W2049586219 hasConceptScore W2049586219C112764850 @default.
• W2049586219 hasConceptScore W2049586219C127313418 @default.
• W2049586219 hasConceptScore W2049586219C149347711 @default.
• W2049586219 hasConceptScore W2049586219C151730666 @default.
• W2049586219 hasConceptScore W2049586219C161509811 @default.
• W2049586219 hasConceptScore W2049586219C171701179 @default.
• W2049586219 hasConceptScore W2049586219C173776410 @default.
• W2049586219 hasConceptScore W2049586219C17409809 @default.
• W2049586219 hasConceptScore W2049586219C202746551 @default.
• W2049586219 hasConceptScore W2049586219C26687426 @default.
• W2049586219 hasConceptScore W2049586219C46381822 @default.
• W2049586219 hasConceptScore W2049586219C487381 @default.
• W2049586219 hasConceptScore W2049586219C5900021 @default.
• W2049586219 hasConceptScore W2049586219C67236022 @default.
• W2049586219 hasConceptScore W2049586219C77928131 @default.
• W2049586219 hasConceptScore W2049586219C93033518 @default.
• W2049586219 hasConceptScore W2049586219C95628711 @default.
• W2049586219 hasIssue "1" @default.
• W2049586219 hasLocation W20495862191 @default.
• W2049586219 hasOpenAccess W2049586219 @default.
• W2049586219 hasPrimaryLocation W20495862191 @default.
• W2049586219 hasRelatedWork W1962911034 @default.
• W2049586219 hasRelatedWork W1995150562 @default.
• W2049586219 hasRelatedWork W2000937342 @default.
• W2049586219 hasRelatedWork W2015077181 @default.
• W2049586219 hasRelatedWork W2088528775 @default.
• W2049586219 hasRelatedWork W2766262586 @default.
• W2049586219 hasRelatedWork W2997534039 @default.
• W2049586219 hasRelatedWork W3129007776 @default.

• next