Eynatten, Hilmar von

[["dc.bibliographiccitation.firstpage","346"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","Chemical Geology"],["dc.bibliographiccitation.lastpage","369"],["dc.bibliographiccitation.volume","261"],["dc.contributor.author","Luvizotto, George Luiz"],["dc.contributor.author","Zack, Thomas"],["dc.contributor.author","Meyer, H. P."],["dc.contributor.author","Ludwig, Thomas"],["dc.contributor.author","Triebold, Silke"],["dc.contributor.author","Kronz, A."],["dc.contributor.author","Muenker, Carsten"],["dc.contributor.author","Stockli, Daniel F."],["dc.contributor.author","Prowatke, S."],["dc.contributor.author","Klemme, S."],["dc.contributor.author","Jacob, Dorrit E."],["dc.contributor.author","von Eynatten, Hilmar"],["dc.date.accessioned","2018-11-07T08:30:39Z"],["dc.date.available","2018-11-07T08:30:39Z"],["dc.date.issued","2009"],["dc.description.abstract","The present paper reports trace element concentrations of 15 elements (V, Cr, Fe, Zr, Nb, Mo, Sn, Sb, Hf, Ta, W, Lu, Pb, Th and U) as well as Ph and Hf isotope data for four relatively homogeneous and large (centimeter size) rutile grains. Methods employed are SIMS, EMP, LA-ICP-MS, ID-MC-ICP-MS and TIMS. For most elements homogeneity is usually within +/- 10% and occasionally variations are even narrower (+/- 5%), particularly in the core of two of the studied grains. The trace element concentrations of the grains span a broad compositional range (e.g., Zr concentrations are ca. 4, 100, 300 and 800 ppm). Provisional concentration values, calculated based on the homogeneity of the element and agreement between techniques, are presented for Zr, Nb, Sn, Sb, Hf, Ta, W and U. The present work represents a significant step forward in finding a suitable mineral standard for rutile microanalysis and encourages not only further search for mineral standards but also applications of rutile in the field of geochemistry and geochronology. In this sense, the rutiles presented here are useful as mineral standard in general in-situ rutile measurements, particularly for Zr-in-rutile thermometry, quantitative provenance studies (Nb and Cr concentrations as index of source rock type) and U-Pb dating. One of the studied grains has a relatively high U concentration (ca. 30 ppm) and rather constant U-Pb ages (1085.1 to 1096.2 Ma Pb-207/U-235 ages and 1086.3 to 1096.6 Ma, Pb-206/U-238 ages), favoring its application as an age standard for U-Pb rutile dating. Since Lu concentrations in rutile are very low and Hf concentrations can be relatively high (tens of ppm), detrital rutiles may be suitable for obtaining initial Hf isotope composition of source rocks, therefore the rutiles presented here can be used as calibration material for in-situ rutile Hf isotope studies. (C) 2008 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.chemgeo.2008.04.012"],["dc.identifier.isi","000265817200012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16942"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.publisher.place","Amsterdam"],["dc.relation.conference","17th Annual V M Goldschmidt Conference"],["dc.relation.eventlocation","Cologne, GERMANY"],["dc.relation.issn","0009-2541"],["dc.title","Rutile crystals as potential trace element and isotope mineral standards for microanalysis"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","421"],["dc.bibliographiccitation.issue","3-4"],["dc.bibliographiccitation.journal","Chemical Geology"],["dc.bibliographiccitation.lastpage","436"],["dc.bibliographiccitation.volume","244"],["dc.contributor.author","Triebold, Silke"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.contributor.author","Luvizotto, George Luiz"],["dc.contributor.author","Zack, Thomas"],["dc.date.accessioned","2018-11-07T10:57:45Z"],["dc.date.available","2018-11-07T10:57:45Z"],["dc.date.issued","2007"],["dc.description.abstract","This study evaluates the applicability of rutile trace element geochemistry to provenance studies. The study area is the Erzgebirge in eastern Germany, where metamorphic rocks ranging from lower greenschist facies conditions up to granulite facies conditions are exposed. We collected sand and rock samples from small catchment areas for a comparative analysis of rutile geochemistry using wavelength-dispersive electron microprobe. Our results show that rutile geochemistry is a powerful tool in provenance studies, allowing for the identification of source lithologies and an evaluation of the host orogen's metamorphic history. The log (Cr/Nb) ratio has proven to be decisive in discriminating between mafic and metapelitic lithologies. It is also useful for identifying different source rocks when plotted versus a third element or proxy. Furthermore, our results suggest that rutile thermometry can be applied to a much wider range of lithologies than previously assumed. A quantification of temperature populations within single sand samples shows that at high-grade metamorphic conditions, such as those found in the Erzgebirge, more than 65% of rutiles do not re-equilibrate during retrograde metamorphism and thus retain their peak temperature chernistry. Such samples, which have equilibrated at recent metamorphic conditions, can be identified by their 2-sigma standard deviations of less than 120 degrees C. Below 550-600 degrees C, no complete equilibration is reached. Rutiles from greenschist facies and lower metamorphic conditions in the Erzgebirge still inherit relict temperatures from a former metamorphic cycle. They partly record very high temperatures >950 degrees C and supposedly derive from erosion of the west African craton in Ordovician time. (C) 2007 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.chemgeo.2007.06.033"],["dc.identifier.isi","000250284900005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50326"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0009-2541"],["dc.title","Deducing source rock lithology from detrital rutile geochemistry: An example from the Erzgebirge, Germany"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]