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Division of Biogeoscience
Division of Geology and Geochemistry
Division of Urban Geograpahy and Regional Studies
Study Office

P.O. Box 64
(Gustaf Hällströmin katu 2a)
FI-00014 University of Helsinki

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Institute of Seismology

P.O. Box 68
(Gustaf Hällströmin katu 2b)
FI-00014 University of Helsinki

phone +358 294 1911 (university exchange)
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Laboratories and Facilities

O. Tapani Rämö, Ph.D.

RämöProfessor of Geology and Mineralogy
–Petrology and Bedrock Geology

Department of Geosciences and Geography
P.O.Box 64 [Gustaf Hällströmin katu 2a]
FIN-00014 UNIVERSITY OF HELSINKI

tel: +358-9-191 50810
cel: +358-40-526 0636
eMail:  tapani.ramo@helsinki.fi

Education

  • Docent of Petrology, University of Helsinki, 1992
  • Ph.D., Department of Geology, University of Helsinki, 1991
  • M.Sc., Department of Geology, University of Helsinki, 1986
  • B.Sc., Department of Geology, University of Helsinki, 1982

Curriculum Vitae

Teaching Topics

  • Petrology
  • Physical geology
  • Scientific writing in English

Research Topics

  • Origin, evolution, and metallogeny of granitoid rocks
  • Geochemistry
  • Isotope geology
  • Evolution of the continental crust
  • Proterozoic continental flood basalts and massif-type anorthosites

Selected Recent Publications

Upton, B.G.J., Rämö, O.T., Heaman, L.M., Blichert-Toft, J., Kalsbeek, F., Barry, T.L. & Jepsen, H.F., 2005: The Mesoproterozoic Zig-Zag Dal basalts and associated intrusions of eastern North Greenland: progressive mantle plume - lithosphere interaction.
–Contributions to Mineralogy and Petrology 149, 40-56.

Rämö, O.T., Halla, J., Nironen, M., Lauri, L.S., Kurhila, M.I., Käpyaho, A., Sorjonen-Ward, P., Äikäs, O., 2005: EUROGRANITES 2005 – Proterozoic and Archean Granites and Related Rocks of the Finnish Precambrian.
Eurogranites 2005 Field Conference, September 11–17, 2005.
–Publications of the Department of Geology A1, 130 p. [PDF]

Rämö, O.T. (Guest Editor), 2005: Granitic Systems - Ilmari Haapala Special Issue.
–Lithos 80 (1-4), 402 p.

Rämö, O.T. (Editor), 2005: Granitic Systems - Ilmari Haapala Volume.
–Elsevier B.V., Amsterdam-Boston-Heidelberg-London-New York-Oxford-Paris-San Diego-San Francisco-Singapore-Sydney-Tokyo. 402 p.

Rämö, O.T., 2005: Preface: Granitic systems - a special issue in honor of Ilmari Haapala.
in Rämö, O.T. (Editor), 2005: Granitic Systems - Ilmari Haapala Special Issue.
–Lithos 80, xi-xix.

Dall'Agnol, R., Teixeira, N.P., Rämö, O.T., Moura, C.A.V., Macambira, M.J.B. & de Oliveira, D.C., 2005: Petrogenesis of the Paleoproterozoic, rapakivi, A-type granites of the Archean Carajás Mining Province, Brazil.
in Rämö, O.T. (Editor), 2005: Granitic Systems - Ilmari Haapala Special Issue.
–Lithos 80, 101-129.

Haapala, I., Rämö, O.T., Frindt, S., 2005: Comparison of Proterozoic and Phanerozoic rift-related basaltic-granitic magmatism.
in Rämö, O.T. (Editor), 2005: Granitic Systems - Ilmari Haapala Special Issue.
–Lithos 80, 1-32.

Kirs, J., Haapala, I. & Rämö, O.T., 2004: Anorogenic magmatic rocks in the Estonian crystalline basement.
in Soesoo, A. (Editor), 2004: Special issue on the Precambrian basement of Estonia.
–Proceedings of the Estonian Academy of Sciences, Geology 53 (3), 210-225.

Rämö, O.T., McLemore, V.T., Hamilton, M.A., Kosunen, P.J., Heizler, M. & Haapala, I., 2003: Intermittent 1630-1220 Ma magmatism in central Mazatzal province: New geochronologic piercing points and some tectonic implications.
–Geology 31 (4), 335-338.

Vander Auwera, J., Martin, H. & Rämö, T. (Guest Editors), 2003: Origin and Evolution of Precambrian Anorogenic Magmatism, Special Issue.
–Precambrian Research 124 (2-4), 239 p.

Pedersen, S.A.S., Craig, L.E., Upton, B.G.J., Rämö, O.T., Jepsen, H.F. & Kalsbeek, F., 2002: Palaeoproterozoic (1740 Ma) rift-related volcanism in the Hekla Sund region, eastern North Greenland: field occurrence, geochemistry and tectonic setting.
–Precambrian Research 114, 327-346.

Expanded list of selected publications.

Courses

  • Physical geology
  • Introduction to igneous petrology
  • Introduction to sedimentary petrology
  • Advanced igneous petrology
  • Applied thermodynamics
  • Writing in English in earth sciences

Graduate Students

  • Elina Arponen (Iridescent plagioclase-bearing massif-type anorthosites)
  • Esa Heilimo (The Kaapinsalmi tonalite, eastern Finland)
  • Kati Karkkulainen (Bedrock structure in the northern Baltic Sea)
  • Kirsi Larjamo (Ti- and P-rich mafic intrusions, western Finland)
  • Viveca Lindqvist (Mesoproterozoic basalts and associated redbeds, Lake Ladoga basin, Russia)
  • Esa Pohjolainen (Mineralogy of radiogenic elements in the Kola super-deep borehole)

Postgraduate Students

  • Habte A. Asnakew
    (Cryptic mineral variations in the Oulanka layered igneous complex, northern Karelia, Russia with reference to platinum group minerals)
  • Asko Käpyaho
    (Terrane analysis of the Finnish Archean: isotopic and geochronological studies along the seismic FIRE line)
  • Matti I. Kurhila (Late-orogenic granites of the Finnish Svecofennian – origin and tectonic significance)
  • Marjaleena Lehtonen (Kimberlites in Finland: Information about the mantle of the Karelian craton and implications for diamond exploration)

Postdoc Students

  • Laura S. Lauri (Granite petrology and uranium metallogeny in southern Finland)

Research Statement

Since the late 1980’s, much of my research has focused on the petrogenesis of the rapakivi granites and related rocks. My Ph.D. thesis dealt with the petrology, geochemistry, and isotope geology of rapakivi granites and related basic rocks of southeastern Fennoscandia. I showed that the locus classicus 1650-1540 Ma rapakivi granites of southern Finland represent remelting of Paleoproterozoic lower crust, whereas the adjacent Russian Karelian rapakivi granites (Lake Ladoga region) are mixtures of Proterozoic and Archean crust. The associated basic rocks (gabbro-anorthosites, diabase dikes) were derived from the subcontinental mantle and represent the thermal perturbations that caused the crust to melt and led to the generation of rapakivi magma. These studies verified the magmatic underplating model first applied to the Finnish rapakivi granites by Professor Ilmari Haapala in 1985.

At the postdoctoral stage, I have continued (e.g., as a Senior Research Fellow of the Academy of Finland) research on rapakivi granites and related rocks, now on a global scale. These studies have involved occurrences in China (rapakivi granites of the Beijing area), Amazonian craton (oxidized rapakivi granites of Carajás, tin-mineralized granites of Roraima), southwestern New Mexico (Proterozoic rapakivi granites, anorthosites, and lamprophyres and their metamorphic country rocks), southern Nevada (Miocene rapakivi-type granites and related mafic rocks), and southeastern California (Cenozoic and Mesozoic granitoid rocks and Precambrian cratonic rocks of the southern Death Valley region). The studies have built on active collaboration with local universities and research institutes and have also involved researcher training. Nd, Sr, and Pb isotope analyses have had a central role in these studies and I have performed the analytical work at the radiogenic isotope laboratory of the Geological Survey of Finland. The results have not only shed new light on the petrogenesis of the rapakivi granites and associated mafic rocks, but have also revealed the crucial role of rapakivi granites as a monitor of the evolution of the Earth’s crust through time. In addition to these global research projects, I have actively participated in the International Geological Correlation Programme of UNESCO and IUGS – as a co-leader of IGCP-426 (Granite Systems and Proterozoic Lithospheric Processes; 1998-2003) and IGCP-510 (A-type Granites and Related Rocks trough Time; 2005-2009). Recently, I have broadened my research agenda to include the petrogenesis of Precambrian continental flood basalts provinces in northern Greenland and northwestern Russia.

My publication list includes 205 citations. Thirty-six of these are peer-reviewed papers in international journals. I have also published ten proceedings volume papers, two monographs, 18 other scientific papers, and more than 120 conference abstracts, and have edited or co-edited several international granite-oriented special issues.

International Research Projects

  • Cenozoic rapakivi granites and their Mesozoic and Precambrian country rocks in southeastern California and southern Nevada.
  • Mesoproterozoic magmatism and tectonic evolution of southern Laurentia (New Mexico, Arizona, Texas).
  • Anorogenic magmatism in Dronning Maud Land, Antarctica.
  • Rapakivi granites of Brazil and the evolution of the Amazonian craton.
  • Mesoproterozoic basalts and associated redbeds in the Lake Ladoga basin, Russian Karelia.
  • Volcanic rocks associated with the Fennoscandian rapakivi granites, Island of Suursaari, eastern Gulf of Finland region, Russia.

Domestic Research Projects

  • Petrogenesis of the Ahvenisto gabbro-anorthosite–rapakivi granite complex.
  • Mineralogy and isotope geochemistry of the Luumäki rapakivi pegmatite.
  • Geochronology and geochemistry of the Laitila rapakivi granite batholith.
  • Lateorogenic granites of the Finnish Svecofennian – origin and tectonic significance.
  • Granite petrology and uranium metallogeny in southern Finland.
  • Early Paleoproterozoic layered mafic intrusions and silicic A-type magmatism in the Koillismaa–Kuhmo region, eastern Finland.
  • Mesoproterozoic mafic magmatism and redbeds in the Satakunta region, southwestern Finland.
  • Stabilization processes of Precambrian continental crust.

International Scientific Programs