Krippner, Anne

[["dc.bibliographiccitation.firstpage","36"],["dc.bibliographiccitation.journal","Sedimentary Geology"],["dc.bibliographiccitation.lastpage","52"],["dc.bibliographiccitation.volume","306"],["dc.contributor.author","Krippner, Anne"],["dc.contributor.author","Meinhold, Guido"],["dc.contributor.author","Morton, Andrew C."],["dc.contributor.author","von Eynatten, Hilmar"],["dc.date.accessioned","2018-11-07T09:39:39Z"],["dc.date.available","2018-11-07T09:39:39Z"],["dc.date.issued","2014"],["dc.description.abstract","This work is an attempt to evaluate six different garnet discrimination diagrams (one binary diagram and five ternary diagrams) commonly used by many researchers. The mineral chemistry of detrital garnet is a useful tool in sedimentary provenance studies, yet there is no clear-cut understanding of what garnet type originates from which host lithology. Several discrimination diagrams exist for garnet showing distinct compositional fields, separated by strict boundaries that are thought to reflect specific types of source rocks. For this study, a large dataset was compiled (N = 3532) encompassing major element compositions of garnets derived from various host lithologies, including metamorphic, igneous, and mantle-derived rocks, in order to test the applicability of the various discrimination schemes. The dataset contains mineral chemical data collected from the literature complemented with some new data (N = 530) from garnet-bearing metamorphic and ultramafic rocks in Austria and Norway. Discrimination of the tested diagrams only works for a small group of garnets derived from mantle rocks, granulite-facies metasedimentary rocks, and felsic igneous rocks. For other garnet types, the assignment to a certain type of host rock remains ambiguous. This is considered insufficient and therefore the evaluated diagrams should be used with great care. We further apply compositional biplot analysis to derive some hints towards future perspectives in detrital garnet discrimination. (c) 2014 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","CASP; German Research Foundation (DFG) [EY 23/20-1]"],["dc.identifier.doi","10.1016/j.sedgeo.2014.03.004"],["dc.identifier.isi","000336707200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33334"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-0968"],["dc.relation.issn","0037-0738"],["dc.title","Evaluation of garnet discrimination diagrams using geochemical data of garnets derived from various host rocks"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","96"],["dc.bibliographiccitation.journal","Sedimentary Geology"],["dc.bibliographiccitation.lastpage","105"],["dc.bibliographiccitation.volume","336"],["dc.contributor.author","Krippner, Anne"],["dc.contributor.author","Meinhold, Guido"],["dc.contributor.author","Morton, Andrew C."],["dc.contributor.author","Schoenig, Jan"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.date.accessioned","2018-11-07T10:15:15Z"],["dc.date.available","2018-11-07T10:15:15Z"],["dc.date.issued","2016"],["dc.description.abstract","Detrital heavy minerals commonly document the geological setting in the source area, hence they are widely used in sedimentary provenance analysis. In heavy mineral studies, the 63-125 and 63-250 mu m grain size fractions are most commonly used. Heavy mineral data and garnet geochemistry of stream sediments and bedrocks from the catchment area draining the Almldovdalen peridotite massif in SW Norway reveal that a wider grain size spectrum needs to be considered to avoid misleading interpretations. The Almklovdalen peridotite massif consists mainly of dunite and harzburgite, as testified by the heavy mineral suite. At the outlet of the main river, the heavy mineral spectrum is very monotonous due to dilution by a strong influx of olivine. Heavy minerals like apatite and epidote characterising the host gneisses have almost disappeared. MgO-rich almandine garnets are more frequent in the coarser grain size fractions, whereas MnO-rich almandine garnets are more frequent in the finer grain size fractions. Garnets with pyrope content exceeding 50% are only found in the 500-1000 mu m grain size fraction. Therefore, the sample location and the selected grain size fraction are of paramount importance when dealing with heavy minerals and mineral geochemical data; otherwise, provenance sensitive information may be missed. (C) 2015 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","CASP; German Research Foundation (DFG grant) [EY 23/20-1]"],["dc.identifier.doi","10.1016/j.sedgeo.2015.09.009"],["dc.identifier.isi","000374611100009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40773"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-0968"],["dc.relation.issn","0037-0738"],["dc.title","Heavy minerals and garnet geochemistry of stream sediments and bedrocks from the Almklovdalen area, Western Gneiss Region, SW Norway: Implications for provenance analysis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","25"],["dc.bibliographiccitation.journal","Sedimentary Geology"],["dc.bibliographiccitation.lastpage","38"],["dc.bibliographiccitation.volume","321"],["dc.contributor.author","Krippner, Anne"],["dc.contributor.author","Meinhold, Guido"],["dc.contributor.author","Morton, Andrew C."],["dc.contributor.author","Russell, Eva"],["dc.contributor.author","von Eynatten, Hilmar"],["dc.date.accessioned","2018-11-07T09:57:13Z"],["dc.date.available","2018-11-07T09:57:13Z"],["dc.date.issued","2015"],["dc.description.abstract","Heavy minerals are valuable indicators about the geological framework in the source area. The heavy mineral garnet is one of the most widespread heavy minerals in orogenic sediments and its geochemistry provides important information about metamorphic conditions. The application of heavy minerals and garnet geochemistry for sedimentary provenance analysis is tested for modern stream sediments collected along three rivers draining the Eclogite Zone and adjacent geological source units of the western Hohe Tauern area in the central Eastern European Alps. For comparison with the stream sediments, rock outcrops exposed in this area were also sampled. The chosen area is very well investigated and provides an excellent place to constrain the relations between source rocks and sediment in first-order drainages. The influence of grain size is studied in detail by considering grain-size fractions ranging from coarse silt to coarse sand (32 to 1000 mu m). In all grain-size fractions the heavy mineral assemblages are characterised to a variable extent by epidote, zoisite, garnet, and green calcic amphibole. In the smaller grain-size fraction apatite is more frequent, whereas in the coarser grain-size fractions an increase of green calcic amphibole and garnet can be observed. Electron microprobe analysis of detrital garnet shows the dominance of almandine-rich garnet. Stream sediments within and downstream of the Eclogite Zone show an increase of pyrope-rich garnets. Interestingly, in all samples, grossular-rich garnets are more frequent in the smaller grain sizes and pyrope-rich garnets are more frequent in the coarser grain sizes. This is controlled by the original finer size distribution of grossular in the source rocks rather than being a hydraulic effect. The heavy mineral assemblages and garnet geochemical data reflect the geological setting of the study area, hence confirming the general strength of these methods in sedimentary provenance analysis. However, the data underline strong grain-size control on sediment composition including single-grain compositional variations. (C) 2015 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","CASP; German Research Foundation (DFG) [EY 23/20-1]"],["dc.identifier.doi","10.1016/j.sedgeo.2015.03.002"],["dc.identifier.isi","000354585200003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37113"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1879-0968"],["dc.relation.issn","0037-0738"],["dc.title","Grain-size dependence of garnet composition revealed by provenance signatures of modern stream sediments from the western Hohe Tauern (Austria)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]