Rapakivi Granites and Related Rocks

Rapakivi Granites and Related Rocks tells the story of Rapakivi granites, which are a group of granitic rocks characterized by specific texture (presence of plagioclase-mantled ovoidal to subhedral alkali feldspar megacrysts, two generations of quartz and feldspars) and A-type geochemical composition. Well-known representatives are the Proterozoic rapakivi granites that are found as anorogenic or post-orogenic batholith- to stock-sized intrusive complexes in the Precambrian cratons of Ukraine, Fennoscandia, South Greenland, Canada, United States, Brazil, Venezuela, and Siberia. The current knowledge of the rapakivi granites is largely based on the achievements of three International Geological Correlation Programme projects: IGCP-315 (Rapakivi Granites and Related Rocks) in in 1991-1996, IGCP-426 (Granite Systems and Proterozoic Lithospheric Processes) in 1998-2002, and IGCP-510 (A-type Granites and Related Rocks Through Time) in 2005-2009. After these projects, the research has continued actively utilizing enhanced geochemical methods, in situ geochemistry in particular. Rapakivi Granites and Related Rocks includes this research as well as abundant new geochemical and isotopic data combined with deeper understanding of geotectonic processes now allow more detailed tectonic and petrological modelling of the rapakivi granite magmatism and associated ore mineralization. Includes more than 200 figures, including full color geological maps and photographs Feature chapters dealing with metallogeny and mineral deposits, which will be useful for those working in exploration and mining companies Presents a discussion of Paleomagnetism of rapakivi granites, which can be used to reconstruct ancient supercontinents and to decipher their evolution INDICE: 1. Historical Background and Definitions 2. Rapakivi Texture and Rapakivi Granite 3. State of the Art: Discussion on Various Aspects of Rapakivi Granite and Related Rocks 4. Intensive Parameters 5. Origin of Rapakivi Granite Magmas 6. Origin of Mantled Alkali Feldspar Megacrysts 7. Metallogeny 8. Granitoids Approaching Rapakivi Granites

• ISBN: 978-0-12-821415-2
• Editorial: Elsevier
• Encuadernacion: Rústica
• Páginas: 400
• Fecha Publicación: 01/08/2023
• Nº Volúmenes: 1
• Idioma: Inglés