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Archean Rare-Metal Pegmatites in Zimbabwe and Western Australia
Lithium-cesium-tantalum (LCT) pegmatites are important resources for rare metals. For Cs, only the LCT pegmatites with the zeolite group mineral pollucite at Bikita (Zimbabwe Craton) and Tanco (Superior Province Craton) are of commercial importance. Common characteristics of world-class LCT pegmatite deposits include their Meso- to Neoarchean age and geological setting within greenstone belt lithologies on Archean Cratons. This study presents the first coherent and comparative scientific investigation of five major LCT pegmatite systems from the Yilgarn, Pilbara and Zimbabwe Craton. For the evaluation of their Cs potential and of the genetic concepts of pollucite formation, the pegmatites from Wodgina, Londonderry, Mount Deans and Cattlin Creek were compared to the Bikita pollucite mineralization. The integration of the new data (e.g., geochronological and radiogenic isotope data) into the complex geological framework: 1) enhances our knowledge of the formation of LCT pegmatite systems, and 2) will contribute to the further exploration of additional world-class LCT pegmatite deposits, which 3) may host massive pollucite mineralisations.
Ofioliti
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388 Great Hairstyles
"Those bad hair days may have finally met their match! The variety of hair cuts and styles is mega. The instructions are simple and complete. And there are tons of cool photos....how to create everything from funky flat twists to tousled updos to classic french braids. Useful tidbits tell how to keep hair healthy....explains what hair styles fit different face shapes....a wonderful fashion tool. Try the styles at home or take the book to the salon and let the stylist do all the work."--Detroit News.
Franko-Media: Aufriss einer französischen Sprach- und Medienwissenschaft
Der vorliegende Band führt unter medienwissenschaftlichen Aspekten skizzenhaft zwei Forschungsfelder zusammen: Zum einen die Frankophonie als einen weltumspannenden Kulturraum, der auf einen Punkt - Paris/Frankreich - zentriert ist, zum anderen die französische Sprache und Kultur, die ein philosophisches Denken im Übergang von Strukturalismus zum Poststrukturalismus ausprägt, hinter das die sprach-, zeichen- und medientheoretischen Debatten des beginnenden 21. Jahrhunderts nicht zurückfallen sollten. Mediensemiotisch werden die kommunikativen Wirkungen transmedialer Synästhesien, d.h. der.
