TY - JOUR A1 - Costard, Sylvia A1 - Stadie, Nicole A1 - Ritter, Christiane A1 - Moll, Kristina A1 - Landerl, Karin A1 - Kohnen, Saskia A1 - Kentner, Gerrit A1 - Bethmann, Anja A1 - Scheich, Henning A1 - Brechmann, André A1 - De Kok, Dörte A1 - Berger, Frauke A1 - Sticher, Heike A1 - Czepluch, Christine A1 - Mätzener, Flurina A1 - Wilmes, Stefanie A1 - Hadert, Sandra A1 - Frank, Ulrike A1 - Mäder, Mark A1 - Westermann, Antje A1 - Meinusch, Miriam A1 - Neumann, Sandra A1 - Düsterhöft, Stefanie A1 - Posse, Dorothea A1 - Puritz, Caroline A1 - Seidl, Rainer Ottis A1 - Etzien, Maria A1 - Machleb, Franziska A1 - Lorenz, Antje A1 - Höger, Maria A1 - Schröder, Astrid A1 - Busch, Tobias A1 - Heide, Judith A1 - Tagoe, Tanja A1 - Watermeyer, Melanie A1 - Höhle, Barbara A1 - Kauschke, Christina ED - Hanne, Sandra ED - Fritzsche, Tom ED - Ott, Susan ED - Adelt, Anne T1 - Spektrum Patholinguistik = Schwerpunktthema: Lesen lernen: Diagnostik und Therapie bei Störungen des Leseerwerbs T1 - Spektrum Patholinguistik = Key issue: Learning to read: Assessment and intervention in developmental reading disorders N2 - Am 20. November 2010 fand an der Universität Potsdam das 4. Herbsttreffen Patholinguistik statt. Die Konferenzreihe wird regelmäßig seit 2007 vom Verband für Patholinguistik e.V. (vpl) durchgeführt. Der vorliegende Tagungsband veröffentlicht die Hauptvorträge des Herbsttreffens zum Thema "Lesen lernen: Diagnostik und Therapie bei Störungen des Leseerwerbs". Des Weiteren sind die Beiträge promovierender bzw. promovierter PatholinguistInnen sowie der Posterpräsentationen enthalten. N2 - On November 20, 2010, the 4th Herbsttreffen Patholinguistik took place at the University of Potsdam. This annual conference is organized by the Verband für Patholinguistik e.V. (vpl). The main topic was "Learning to read: Assessment and intervention in developmental dyslexia". These proceedings contain the four main lectures, the contributed talks of the "Spektrum Patholinguistik" covering various psycho- and neurolinguistic research areas, and the abstracts of the presented posters. T3 - Spektrum Patholinguistik - 4 KW - Patholinguistik KW - Sprachtherapie KW - Leseerwerb KW - Dyslexie KW - Lese-Rechtschreib-Schwäche KW - patholinguistics KW - speech/language therapy KW - reading development KW - reading skills KW - dyslexia Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-53146 SN - 978-3-86956-145-5 SN - 1869-3822 SN - 1866-9433 IS - 4 PB - Universitätsverlag Potsdam CY - Potsdam ER - TY - JOUR A1 - Lorenz, Melanie A1 - Altenberger, Uwe A1 - Trumbull, Robert B. A1 - Lira, Raul A1 - Lopez de Luchi, Monica Graciela A1 - Günter, Christina A1 - Eidner, Sascha T1 - Chemical and textural relations of britholite- and apatite-group minerals from hydrothermal REE mineralization at the Rodeo de los Molles deposit, Central Argentina JF - American mineralogist : an international journal of earth and planetary materials N2 - Britholite group minerals (REE,Ca)(5)[(Si,P)O-4](3)(OH,F) are widespread rare-earth minerals in alkaline rocks and their associated metasomatic zones, where they usually are minor accessory phases. An exception is the REE deposit Rodeo de los Molles, Central Argentina, where fluorbritholite-(Ce) (FBri) is the main carrier of REE and is closely intergrown with fluorapatite (FAp). These minerals reach an abundance of locally up to 75 modal% (FBri) and 20 modal% (FAp) in the vein mineralizations. The Rodeo de los Molles deposit is hosted by a fenitized monzogranite of the Middle Devonian Las Chacras-Potrerillos batholith. The REE mineralization consists of fluorbritholite-(Ce), britholite-(Ce), fluorapatite, allanite-(Ce), and REE fluorcarbonates, and is associated with hydrothermal fluorite, quartz, albite, zircon, and titanite. The REE assemblage takes two forms: irregular patchy shaped REE-rich composites and discrete cross-cutting veins. The irregular composites are more common, but here fluorbritholite-(Ce) is mostly replaced by REE carbonates. The vein mineralization has more abundant and better-preserved britholite phases. The majority of britholite grains at Rodeo de los Molles are hydrothermally altered, and alteration is strongly enhanced by metamictization, which is indicated by darkening of the mineral, loss of birefringence, porosity, and volume changes leading to polygonal cracks in and around altered grains. A detailed electron microprobe study of apatite-britholite minerals from Rodeo de los Molles revealed compositional variations in fluorapatite and fluorbritholite-(Ce) consistent with the coupled substitution of REE3+ + Si4+ = Ca2+ + P5+ and a compositional gap of similar to 4 apfu between the two phases, which we interpret as a miscibility gap. Micrometer-scale intergrowths of fluorapatite in fluorbritholite-(Ce) minerals and vice versa are chemically characterized here for the first time and interpreted as exsolution textures that formed during cooling below the proposed solvus. KW - Britholite KW - apatite KW - exsolution textures KW - miscibility gap KW - compositional gap KW - REE KW - fenite KW - alkaline granites KW - hydrothermal alteration Y1 - 2019 U6 - https://doi.org/10.2138/am-2019-6969 SN - 0003-004X SN - 1945-3027 VL - 104 IS - 12 SP - 1840 EP - 1850 PB - Mineralogical Society of America CY - Chantilly ER - TY - JOUR A1 - Dämpfling, Helge L. C. A1 - Mielke, Christian A1 - Koellner, Nicole A1 - Lorenz, Melanie A1 - Rogass, Christian A1 - Altenberger, Uwe A1 - Harlov, Daniel E. A1 - Knoper, Michael T1 - Automatic element and mineral detection in thin sections using hyperspectral transmittance imaging microscopy (HyperTIM) JF - European journal of mineralogy N2 - In this study we present a novel method for the automatic detection of minerals and elements using hyperspectral transmittance imaging microscopy measurements of complete thin sections (HyperTIM). This is accomplished by using a hyperspectral camera system that operates in the visible and near-infrared (VNIR) range with a specifically designed sample holder, scanning setup, and a microscope lens. We utilize this method on a monazite ore thin section from Steenkampskraal (South Africa), which we analyzed for the rare earth element (REE)-bearing mineral monazite ((Ce,Nd,La)PO4), with high concentrations of Nd. The transmittance analyses with the hyperspectral VNIR camera can be used to identify REE minerals and Nd in thin sections. We propose a three-point band depth index, the Nd feature depth index (NdFD), and its related product the Nd band depth index (NdBDI), which enables automatic mineral detection and classification for the Nd-bearing monazites in thin sections. In combination with the average concentration of the relative Nd content, it permits a destruction-free, total concentration calculation for Nd across the entire thin section. Y1 - 2022 U6 - https://doi.org/10.5194/ejm-34-275-2022 SN - 0935-1221 SN - 1617-4011 VL - 34 IS - 3 SP - 275 EP - 284 PB - Copernicus CY - Göttingen ER -