Patzer-Wilson, Andrea

[["dc.bibliographiccitation.firstpage","1136"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Meteoritics and Planetary Science"],["dc.bibliographiccitation.lastpage","1151"],["dc.bibliographiccitation.volume","45"],["dc.contributor.author","Patzer, Andrea"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Gerdes, Axel"],["dc.date.accessioned","2018-11-07T08:41:55Z"],["dc.date.available","2018-11-07T08:41:55Z"],["dc.date.issued","2010"],["dc.description.abstract","The ratio of the two refractory trace elements zirconium (Zr) and hafnium (Hf) in meteorites has been proposed to be uniform. The most precise value available is 34.3 +/- 0.2 (1 sigma). It was obtained by isotope dilution ICP-MS applied to 15 chondrites, most of which were carbonaceous chondrites, and six achondrites. We reinvestigated the case and determined Zr/Hf ratios of a broad spectrum of meteoritic samples via laser ablation ICP-MS. Our sample suite comprised 29 chondrites and five achondrites. The main objective of the study was two-fold: we intended to verify the accuracy and precision of a relatively fast and inexpensive sample preparation method combined with expeditious laser ablation ICP-MS techniques. Furthermore, we were looking into the possibility of systematic fine-scale Zr/Hf variations among bulk meteoritic matter of different classes. The applied fusion technique together with laser ablation ICP-MS turned out to be well suited to determine relative refractory trace element abundances. Absolute Zr/Hf ratios yield uncertainties of approximately 4% (1 sigma). As opposed to the most recent findings, we observed variable Zr/Hf ratios in different meteorites ranging from approximately 28 to approximately 38. Our value for Orgueil (CI1) is 34.0 +/- 0.3 (1 sigma). Including literature data, we propose a solar system value of 34.1 +/- 0.3. Our data also suggest that H chondrites tend to exhibit higher Zr/Hf ratios (average of 35.6 +/- 0.5 [1 sigma]) while EL6 chondrites rather show low values (average of 30.8 +/- 0.6 [1 sigma]). In addition to examining Zr/Hf ratios, we also explored the content of refractory major elements in different meteorite groups. Here, we found that EL6 chondrites often show very low Ca/Al ratios. The CI1 value for CaO/Al(2)O(3) is 0.804. EL6 chondrites, however, display ratios as low as approximately 0.3. While the variation in Zr/Hf can be explained by fractional condensation processes in the early solar nebula, the observed low Ca/Al ratios in EL6 chondrites are probably attributable to deficits in oldhamite (CaS)."],["dc.description.sponsorship","[PA909/2-1]; [PA909/2-2]"],["dc.identifier.doi","10.1111/j.1945-5100.2010.01076.x"],["dc.identifier.isi","283712300010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/19576"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1086-9379"],["dc.title","Zirconium and hafnium in meteorites"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Meteoritics and Planetary Science"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Patzer, Andrea"],["dc.contributor.author","Pack, Andreas"],["dc.contributor.author","Gerdes, Axel"],["dc.date.accessioned","2018-11-07T08:28:22Z"],["dc.date.available","2018-11-07T08:28:22Z"],["dc.date.issued","2009"],["dc.format.extent","A168"],["dc.identifier.isi","000267314500311"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16409"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Meteoritical Soc"],["dc.publisher.place","Fayetteville"],["dc.relation.conference","72nd Annual Meeting of the Meteoritical-Society"],["dc.relation.eventlocation","Nancy, FRANCE"],["dc.relation.issn","1086-9379"],["dc.title","HIGH-PRECISION ZR/HF RATIOS OF METEORITES"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]