FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2005882669> ?p ?o ?g. }

• W2005882669 endingPage "168" @default.
• W2005882669 startingPage "156" @default.
• W2005882669 abstract "Although diamonds of eclogitic paragenesis are commonly encountered in the productions of many Southern Africa kimberlites, the nature and evolution of the protolith to eclogitic diamonds are still poorly understood. There is some evidence that these protoliths (and possibly also the diamonds) may be related to subduction of oceanic crust, although this is not a universally accepted view. In order to further investigate the protolith/diamond relationship, garnets and (in some cases) clinopyroxene inclusions in 23 diamonds from Premier mine and 16 diamonds from Finsch were analysed for their trace element composition. From both mines a strong correlation between the garnet Ca content and the chondrite-normalised rare earth element (REE) pattern is evident. Garnets with comparatively low Ca content are characterised by REE patterns which show a steady increase in abundance from light rare earths (LREE) to heavy rare earths (HREE). With increasing Ca content in garnet, the abundance of LREE (La, Ce, Pr, and Nd) as well as the middle rare earths (MREE; Sm, Eu, Gd, and Tb) progressively increases, ultimately giving the trace element pattern a distinct ‘humped’ appearance. Bulk-rock trace element abundance patterns have been reconstructed from measured trace element contents in garnet as well as calculated trace element concentrations in clinopyroxene, based on known clinopyroxene–garnet partition coefficients (Harte and Kirkley, 1997). At both Premier and Finsch, the low-Ca group samples (2.6 to 5.0 wt.% CaO in garnet) are LREE depleted, and have relatively flat calculated bulk-rock trace element abundance patterns at approximately 10 times chondrite concentrations, but with marked positive Sr and negative Zr anomalies. The intermediate-Ca group samples (5.2 to ∼9 wt.% CaO in garnet) are LREE depleted, show Sr and Zr anomalies, have somewhat higher concentrations of Zr and MREE, and have HREE contents that overlap with the low-Ca group (Fig. 6). High-Ca group samples (∼ 9 to 14.8 wt.% CaO in garnet) are LREE depleted, show Sr and Zr anomalies, are MREE-enriched, and have HREE contents that are slightly less than the low- and intermediate-Ca group samples. Based on both the calculated bulk eclogite trace element abundances and their patterns, as well as previously published radiogenic isotope data, our preferred model of protolith evolution for the eclogitic diamonds from Premier and Finsch is one in which both the major and trace element chemistry of the inclusions are ultimately inherited from low-pressure oceanic protoliths, consisting of varying mixtures of oceanic basalt + cumulate gabbro for diamonds from both Premier and Finsch. Of particular importance in the current data are the presence of marked negative Zr anomalies, marked positive Sr anomalies, and a general absence of Eu anomalies in all compositional groupings. The Zr anomaly can arise in reconstructed bulk eclogite trace element abundance patterns if rutile is not included in the calculations, but the Sr anomalies (coupled with an absence of Eu anomalies) can only be explained through the mixing of oceanic gabbro and mid-ocean ridge basalt. The averaged eclogite bulk trace element compositions for Premier and Finsch are also markedly similar to that of clinopyroxene in a typical cumulate gabbro, and a role for cumulate clinopyroxene in protolith evolution may therefore also be inferred. It is likely that prior to and during diamond crystallisation, the major and particularly the trace element compositions of the high-pressure eclogite source rock to these diamonds may have been slightly modified by metasomatic fluids and melts. However large-scale fluid- or melt-related metasomatic processes are not indicated." @default.
• W2005882669 created "2016-06-24" @default.
• W2005882669 creator A5020594895 @default.
• W2005882669 creator A5036761042 @default.
• W2005882669 creator A5050563655 @default.
• W2005882669 creator A5062977825 @default.
• W2005882669 date "2010-07-01" @default.
• W2005882669 modified "2023-09-27" @default.
• W2005882669 title "Trace element chemistry of mineral inclusions in eclogitic diamonds from the Premier (Cullinan) and Finsch kimberlites, South Africa: Implications for the evolution of their mantle source" @default.
• W2005882669 cites W120110337 @default.
• W2005882669 cites W1620200861 @default.
• W2005882669 cites W1674882872 @default.
• W2005882669 cites W1967700183 @default.
• W2005882669 cites W1969859799 @default.
• W2005882669 cites W1970183696 @default.
• W2005882669 cites W1973594267 @default.
• W2005882669 cites W1974544384 @default.
• W2005882669 cites W1983193171 @default.
• W2005882669 cites W1984206488 @default.
• W2005882669 cites W1994435917 @default.
• W2005882669 cites W1994499897 @default.
• W2005882669 cites W1996063806 @default.
• W2005882669 cites W1997769874 @default.
• W2005882669 cites W1997939337 @default.
• W2005882669 cites W2005300407 @default.
• W2005882669 cites W2011399272 @default.
• W2005882669 cites W2011891033 @default.
• W2005882669 cites W2012299494 @default.
• W2005882669 cites W2012512561 @default.
• W2005882669 cites W2016917895 @default.
• W2005882669 cites W2017941972 @default.
• W2005882669 cites W2018164646 @default.
• W2005882669 cites W2020163712 @default.
• W2005882669 cites W2021059796 @default.
• W2005882669 cites W2027182507 @default.
• W2005882669 cites W2027662663 @default.
• W2005882669 cites W2030561655 @default.
• W2005882669 cites W2031897474 @default.
• W2005882669 cites W2033593736 @default.
• W2005882669 cites W2034632918 @default.
• W2005882669 cites W2039939064 @default.
• W2005882669 cites W2042392936 @default.
• W2005882669 cites W2043728112 @default.
• W2005882669 cites W2046727007 @default.
• W2005882669 cites W2048594475 @default.
• W2005882669 cites W2060917776 @default.
• W2005882669 cites W2062670865 @default.
• W2005882669 cites W2068284041 @default.
• W2005882669 cites W2070855626 @default.
• W2005882669 cites W2074703934 @default.
• W2005882669 cites W2079896986 @default.
• W2005882669 cites W2080230245 @default.
• W2005882669 cites W2081221388 @default.
• W2005882669 cites W2083433016 @default.
• W2005882669 cites W2084250087 @default.
• W2005882669 cites W2085035955 @default.
• W2005882669 cites W2087144199 @default.
• W2005882669 cites W2089970086 @default.
• W2005882669 cites W2090194751 @default.
• W2005882669 cites W2090410331 @default.
• W2005882669 cites W2091676566 @default.
• W2005882669 cites W2095234983 @default.
• W2005882669 cites W2096559627 @default.
• W2005882669 cites W2107015288 @default.
• W2005882669 cites W2110119770 @default.
• W2005882669 cites W2119438235 @default.
• W2005882669 cites W2133380872 @default.
• W2005882669 cites W2147155351 @default.
• W2005882669 cites W2159835383 @default.
• W2005882669 cites W2161194127 @default.
• W2005882669 cites W2162514095 @default.
• W2005882669 cites W2166090795 @default.
• W2005882669 cites W2335893009 @default.
• W2005882669 cites W2794956287 @default.
• W2005882669 cites W4229585769 @default.
• W2005882669 cites W4236669475 @default.
• W2005882669 doi "https://doi.org/10.1016/j.lithos.2010.04.011" @default.
• W2005882669 hasPublicationYear "2010" @default.
• W2005882669 type Work @default.
• W2005882669 sameAs 2005882669 @default.
• W2005882669 citedByCount "18" @default.
• W2005882669 countsByYear W20058826692012 @default.
• W2005882669 countsByYear W20058826692014 @default.
• W2005882669 countsByYear W20058826692015 @default.
• W2005882669 countsByYear W20058826692016 @default.
• W2005882669 countsByYear W20058826692017 @default.
• W2005882669 countsByYear W20058826692018 @default.
• W2005882669 countsByYear W20058826692020 @default.
• W2005882669 countsByYear W20058826692022 @default.
• W2005882669 countsByYear W20058826692023 @default.
• W2005882669 crossrefType "journal-article" @default.
• W2005882669 hasAuthorship W2005882669A5020594895 @default.
• W2005882669 hasAuthorship W2005882669A5036761042 @default.
• W2005882669 hasAuthorship W2005882669A5050563655 @default.
• W2005882669 hasAuthorship W2005882669A5062977825 @default.
• W2005882669 hasConcept C112764850 @default.
• W2005882669 hasConcept C116862484 @default.
• W2005882669 hasConcept C121332964 @default.

• next