Matches in SemOpenAlex for { <https://semopenalex.org/work/W2311374064> ?p ?o ?g. }
- W2311374064 abstract "(TYPE=abstract)Late Miocene to Quaternary volcanic rocks from the frontal arc to the back-arc region of the Central Volcanic Zone in the Andes show a wide range of delta 11B values (+4 to -7 ‰) and boron concentrations (6 to 60 ppm). Positive delta 11B values of samples from the volcanic front indicate involvement of a 11B-enriched slab component, most likely derived from altered oceanic crust, despite the thick Andean continental lithosphere, and rule out a pure crust-mantle origin for these lavas. The delta 11B values and B concentrations in the lavas decrease systematically with increasing depth of the Wadati-Benioff Zone. This across-arc variation in delta 11B values and decreasing B/Nb ratios from the arc to the back-arc samples are attributed to the combined effects of B-isotope fractionation during progressive dehydration in the slab and a steady decrease in slab-fluid flux towards the back arc, coupled with a relatively constant degree of crustal contamination as indicated by similar Sr, Nd and Pb isotope ratios in all samples. Modelling of fluid-mineral B-isotope fractionation as a function of temperature fits the across-arc variation in delta 11B and we conclude that the B-isotope composition of arc volcanics is dominated by changing delta 11B composition of B-rich slab-fluids during progressive dehydration. Crustal contamination becomes more important towards the back-arc due to the decrease in slab-derived fluid flux. Because of this isotope fractionation effect, high delta 11B signatures in volcanic arcs need not necessarily reflect differences in the initial composition of the subducting slab. Three-component mixing calculations for slab-derived fluid, the mantle wedge and the continental crust based on B, Sr and Nd isotope data indicate that the slab-fluid component dominates the B composition of the fertile mantle and that the primary arc magmas were contaminated by an average addition of 15 to 30 % crustal material." @default.
- W2311374064 created "2016-06-24" @default.
- W2311374064 creator A5013541697 @default.
- W2311374064 date "2004-01-01" @default.
- W2311374064 modified "2023-09-22" @default.
- W2311374064 title "Boron as a tracer for material transfer" @default.
- W2311374064 cites W1502226098 @default.
- W2311374064 cites W1531643369 @default.
- W2311374064 cites W1971027245 @default.
- W2311374064 cites W1976969250 @default.
- W2311374064 cites W1980333019 @default.
- W2311374064 cites W1981195553 @default.
- W2311374064 cites W1981983698 @default.
- W2311374064 cites W1983394724 @default.
- W2311374064 cites W1984520005 @default.
- W2311374064 cites W1987646385 @default.
- W2311374064 cites W1991337545 @default.
- W2311374064 cites W1997189899 @default.
- W2311374064 cites W1998707404 @default.
- W2311374064 cites W1999584133 @default.
- W2311374064 cites W2000027357 @default.
- W2311374064 cites W2000896842 @default.
- W2311374064 cites W2001481384 @default.
- W2311374064 cites W2002531851 @default.
- W2311374064 cites W2004248079 @default.
- W2311374064 cites W2009007309 @default.
- W2311374064 cites W2009860990 @default.
- W2311374064 cites W2015396785 @default.
- W2311374064 cites W2018946474 @default.
- W2311374064 cites W2020083651 @default.
- W2311374064 cites W2023391448 @default.
- W2311374064 cites W2025131339 @default.
- W2311374064 cites W2026521892 @default.
- W2311374064 cites W2030224792 @default.
- W2311374064 cites W2032117292 @default.
- W2311374064 cites W2034591006 @default.
- W2311374064 cites W2035487382 @default.
- W2311374064 cites W2037899935 @default.
- W2311374064 cites W2048345963 @default.
- W2311374064 cites W2050732885 @default.
- W2311374064 cites W2056399803 @default.
- W2311374064 cites W2056693909 @default.
- W2311374064 cites W2057560563 @default.
- W2311374064 cites W2064145353 @default.
- W2311374064 cites W2079923248 @default.
- W2311374064 cites W2081374273 @default.
- W2311374064 cites W2081901260 @default.
- W2311374064 cites W2087242954 @default.
- W2311374064 cites W2093229933 @default.
- W2311374064 cites W2107282719 @default.
- W2311374064 cites W2108872707 @default.
- W2311374064 cites W2109392791 @default.
- W2311374064 cites W2112375139 @default.
- W2311374064 cites W2115083563 @default.
- W2311374064 cites W2115393563 @default.
- W2311374064 cites W2119438235 @default.
- W2311374064 cites W2120536286 @default.
- W2311374064 cites W2125992484 @default.
- W2311374064 cites W2138522501 @default.
- W2311374064 cites W2139788788 @default.
- W2311374064 cites W2146623053 @default.
- W2311374064 cites W2154804984 @default.
- W2311374064 cites W2270932692 @default.
- W2311374064 cites W2479351267 @default.
- W2311374064 cites W2488911524 @default.
- W2311374064 cites W2604785091 @default.
- W2311374064 hasPublicationYear "2004" @default.
- W2311374064 type Work @default.
- W2311374064 sameAs 2311374064 @default.
- W2311374064 citedByCount "0" @default.
- W2311374064 crossrefType "dissertation" @default.
- W2311374064 hasAuthorship W2311374064A5013541697 @default.
- W2311374064 hasConcept C113740112 @default.
- W2311374064 hasConcept C120806208 @default.
- W2311374064 hasConcept C127313418 @default.
- W2311374064 hasConcept C141646446 @default.
- W2311374064 hasConcept C165205528 @default.
- W2311374064 hasConcept C16942324 @default.
- W2311374064 hasConcept C17409809 @default.
- W2311374064 hasConcept C192241223 @default.
- W2311374064 hasConcept C2776698055 @default.
- W2311374064 hasConcept C58097730 @default.
- W2311374064 hasConcept C67236022 @default.
- W2311374064 hasConcept C77928131 @default.
- W2311374064 hasConcept C8058405 @default.
- W2311374064 hasConceptScore W2311374064C113740112 @default.
- W2311374064 hasConceptScore W2311374064C120806208 @default.
- W2311374064 hasConceptScore W2311374064C127313418 @default.
- W2311374064 hasConceptScore W2311374064C141646446 @default.
- W2311374064 hasConceptScore W2311374064C165205528 @default.
- W2311374064 hasConceptScore W2311374064C16942324 @default.
- W2311374064 hasConceptScore W2311374064C17409809 @default.
- W2311374064 hasConceptScore W2311374064C192241223 @default.
- W2311374064 hasConceptScore W2311374064C2776698055 @default.
- W2311374064 hasConceptScore W2311374064C58097730 @default.
- W2311374064 hasConceptScore W2311374064C67236022 @default.
- W2311374064 hasConceptScore W2311374064C77928131 @default.
- W2311374064 hasConceptScore W2311374064C8058405 @default.
- W2311374064 hasLocation W23113740641 @default.
- W2311374064 hasOpenAccess W2311374064 @default.