Simon, Klaus

[["dc.bibliographiccitation.artnumber","995"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.volume","167"],["dc.contributor.author","Slaby, Ewa"],["dc.contributor.author","Domonik, Andrzej"],["dc.contributor.author","Smigielski, Michal"],["dc.contributor.author","Majzner, Katarzyna"],["dc.contributor.author","Motuza, Gediminas"],["dc.contributor.author","Goetze, Jens"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Moszumanska, Izabela"],["dc.contributor.author","Kruszewski, Lukasz"],["dc.contributor.author","Rydelek, Pawel"],["dc.date.accessioned","2018-11-07T09:41:44Z"],["dc.date.available","2018-11-07T09:41:44Z"],["dc.date.issued","2014"],["dc.description.abstract","An alkali feldspar megacryst from a protomylonite has been studied using laser ablation-ICP-mass spectrometry combined with cathodoluminescence imaging, Raman spectroscopy, and electron probe microanalysis. The aim was to determine the original (magmatic) geochemical pattern of the crystal and the changes introduced by protomylonitization. Digital concentration-distribution models, derivative gradient models, and fractal statistics, e. g., Hurst-exponent values are used in a novel way to reveal subtle changes in the trace-element composition of the feldspar. Formation of the crystal is reflected in a slightly chaotic trace-element (Ba, Sr, and Rb) distribution pattern that is more or less characterized by continuous development from a fairly homogeneous environment. Derivative gradient models demonstrate a microdomain pattern. Fractal statistics show that element behavior was changeable, with Ba and Sr always more persistent (continuing) and Rb always less persistent, with the latter showing a tendency to migrate. The variations in the Hurst exponent are, however, too large to be explained by magmatic differentiation alone. The observed element behavior may be explained by structural changes revealed by Raman spectroscopy and CL. In high-strain domains, T-O-T modes become stronger for Si-O-Al than Al-O-Al linkages. Increasing amounts of Al-O--Al defects are demonstrated by cathodoluminescence. Both may result from small-distance diffusion creep, making the crystal geochemical pattern slightly patchy. In turn, the marginal part of the megacryst has a mosaic of randomly orientated, newly crystallized K-feldspars. The re-growth is confirmed by trace-element distribution patterns and fractal statistics which identify an abrupt change in the transformation environment. The novel set of tools used in this study reveals a complicated history of megacryst formation and transformation that otherwise would be difficult to unravel and decipher."],["dc.identifier.doi","10.1007/s00410-014-0995-5"],["dc.identifier.isi","000335144500004"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11664"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33797"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1432-0967"],["dc.relation.issn","0010-7999"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Protomylonite evolution potentially revealed by the 3D depiction and fractal analysis of chemical data from a feldspar"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","909"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Contributions to Mineralogy and Petrology"],["dc.bibliographiccitation.lastpage","927"],["dc.bibliographiccitation.volume","162"],["dc.contributor.author","Slaby, Ewa"],["dc.contributor.author","Smigielski, Michal"],["dc.contributor.author","Smigielski, Tomasz"],["dc.contributor.author","Domonik, Andrzej"],["dc.contributor.author","Simon, Klaus"],["dc.contributor.author","Kronz, Andreas"],["dc.date.accessioned","2018-11-07T08:50:33Z"],["dc.date.available","2018-11-07T08:50:33Z"],["dc.date.issued","2011"],["dc.description.abstract","As has been demonstrated in recent years, the heterogeneities of coeval magmas can be more successfully revealed by zoned megacrysts rather than by analysis of the whole rocks hosting them. Here, the geochemical heterogeneities of feldspar megacrysts from the Karkonosze granite, Poland, are investigated by LA-ICP-MS. The crystals are the product of migration and growth in regions of poorly mixed magmas. 3D-modeling of the Ba, Sr, and Rb distributions emphasizes the importance of micro-domain growth morphologies. Two models of element behavior-a relative concentration model and a composition gradient model-provide a potentially effective tool for tracking the mixing process on a microscale. Measured concentrations of elements of different mobilities do not agree with what might be expected from the mixing of two end-member magmas. If mixing was the only process occurring, linear correlations between the concentrations of any two elements should be observed; this, however, is not the case. For combinations of any two of the three elements, modeling reveals differing non-linear correlations between concentrations. The megacryst heterogeneities provide an insight into how mixing magmas are chaotically advected to growing crystals and the degree of inter-magma element exchange between the magmas."],["dc.identifier.doi","10.1007/s00410-011-0631-6"],["dc.identifier.isi","000295677500002"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11389"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21719"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","0010-7999"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Chaotic three-dimensional distribution of Ba, Rb, and Sr in feldspar megacrysts grown in an open magmatic system"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]