Thure Georg Sahama
Thure Georg Sahama (born October 14, 1910 in Vyborg as Thure Sahlstein, † March 8, 1983 in Helsinki ) was a Finnish geochemist, geologist and mineralogist. He is considered a pioneer of isotope geochemistry.
Sahama was already interested in petrography as a teenager and attended courses at the University of Helsinki , where he studied from 1930 to 1934 (including one year in Austria). As early as 1930 he published with his teacher Pentti Eskola and as a student he took part in Lauge Koch's Greenland expedition . In 1936 he received his doctorate and from 1938 he was a lecturer in geochemistry and petrology at the University of Helsinki. 1940 to 1946 he worked for the Finnish geological survey. From 1946 until his retirement he was associate professor of geochemistry in Helsinki (with a personal chair).
In his dissertation and later work, he applied Bruno Sander's structural analysis to the granulite mountains of Lapland. In the late 1940s he was doing research on thermochemistry and stability of minerals at the Carnegie Institution's Geophysical Laboratory in Washington DC. He also dealt with volcanology and undertook expeditions to the Virunga volcanoes , particularly the Nyiragongo and its alkaline lava rocks , in the 1950s . He described around 20 new types of mineral. Most recently he traveled to Sri Lanka shortly before his death .
His textbook Geochemistry with Kalervo Rankama (University of Chicago Press 1950, 1960) played an important role in establishing geochemistry, with which Sahama had been concerned since the 1930s.
He also published under his maiden name Sahlstein, from 1936 he finnisiert his name to Sahama.
His mineral collection went to the University of Helsinki.
Honors and memberships
Sahama has been an honorary member of the Mineralogical Society of Great Britain and Ireland since 1966 and an honorary member of the US, Soviet and Brazilian mineralogical societies. In 1972 he was awarded the honorary title of Academic Science ( Tieteen akateemikko ) by the President of the Republic at the suggestion of the Academy of Finland . He was also a member of the Norwegian Academy of Sciences and the Academie Royale des Sciences d´Outre Mer in Brussels and an honorary doctorate from the Free University of Brussels (especially for his work in the Congo). He was an honorary member of the Finnish Geological Society and received its Eskola Medal in 1980.
A 1953 by HW Jaffe, R. Meyerowitz and HT Evans, Jr. The new mineral described was given the name Sahamalith- (Ce) in his honor .
Web links
Individual evidence
- ↑ Finnish edition 1947
- ↑ John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols: Sahamalite- (Ce) , in: Handbook of Mineralogy, Mineralogical Society of America , 2001 ( PDF 65.8 kB )
| personal data | |
|---|---|
| SURNAME | Sahama, Thure Georg |
| ALTERNATIVE NAMES | Sahlstein, Thure; Sahama, Thure |
| BRIEF DESCRIPTION | Finnish geochemist |
| DATE OF BIRTH | October 14, 1910 |
| PLACE OF BIRTH | Vyborg , Finland |
| DATE OF DEATH | March 8, 1983 |
| Place of death | Helsinki , Finland |