Ilmari Haapala received an MSc in geology and mineralogy in 1963, and PhD in 1966 at the University of Helsinki. He has worked as geologist, state geologist and acting head of the Exploration Department at the Geological Survey of Finland in 1966 -2001, and as professor of geology and mineralogy at University of Helsinki in 1982 -2002. Dr. Haapala has lead many Finnish and international research projects, including rapakivi granite projects in Finland, China, USA (New Mexico and Nevada) and Namibia. Organized eight international symposia. Edited several Finnish and English books on economic geology and granite petrology. Chairman of the Geological Society and Mineralogical Society of Finland. Member of the Finnish National Academy of Science and Letters since 1985.Fellow member of the Geological Society of America, the Mineralogical Society of Great Britain and Ireland, and the Geological Society of London.

Texte du rabat

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.

Contenu

Historical Background and Definitions
1. Rapakivi Texture and Rapakivi Granite
2. State of the Art: Discussion on Various Aspects of Rapakivi Granite and Related Rocks
3. Intensive Parameters
4. Origin of Rapakivi Granite Magmas
5. Origin of Mantled Alkali Feldspar Megacrysts
6. Metallogeny
7. Granitoids Approaching Rapakivi Granites