Richard Lee Armstrong

Dr. Richard Lee Armstrong
Born	August 4, 1937 Seattle, Washington, USA
Died	August 9, 1991 Vancouver, British Columbia, Canada
Residence	Canada
Citizenship	Canadian
Nationality	American
Fields	Geology Geochemistry Geochronology
Institutions	Yale University University of British Columbia
Alma mater	Yale University
Doctoral advisor	Karl K. Turekian
Known for	Crustal recycling
Notable awards	Killam Prize Logan Medal

Richard Lee “Dick” Armstrong FRSC (August 4, 1937 – August 9, 1991) was an American/Canadian scientist who was an expert in the fields of radiogenic isotope geochemistry and geochronology, geochemical evolution of the earth, geology of the American Cordillera, and large-magnitude crustal extension. He published over 170 scientific papers.

Armstrong was born in Seattle, Washington.

Education

In 1955, he moved to New Haven, Connecticut to attend Yale University. He obtained his BSc in 1959 and a PhD in 1964. He stayed at Yale as assistant and associate professor in the geology department until 1973. While he was a Yale professor, he took two leaves, the first in 1963-1964 on a National Science Foundation Postdoctoral Fellowship at the University of Berne, and in 1968-1969 as a Morse and Guggenheim Fellow at the Australian National University and California Institute of Technology.

Career

In 1973, Armstrong moved to Vancouver, Canada to be an associate professor at the University of British Columbia. He was eventually made a full professor. In 1979, he became a Canadian citizen.

Armstrong studied the chronology of magmatism, metamorphism, and tectonics of western North America. He utilized several methodologies, including Potassium-Argon, Rubidium-Strontium, Uranium-Lead and Neodymium-Samarium to obtain isotopic data.

Armstrong’s early theories guided research for a generation. His views were controversial and contested by many prominent isotope geochemists. It took decades for other scientists to accept his ideas. Before he died, Armstrong was vindicated through the recognition he received for his model of crustal recycling at the 1990 ICOG meeting in Canberra. Most of Armstrong's effort was spent systematically building an enormous database on the American Cordillera. This database has provided a wealth of information to the scientific community.

Armstrong was an active member of the Geological Society of America and editorial boards for several journals. He participated in the peer review process of the National Science Foundation and Canada's Natural Sciences and Engineering Research Council. He also participated in Canada's Lithoprobe program a national geoscience research project.

In 1991, Armstrong died of cancer.

Accolades

• 1981, made a fellow of the Royal Society of Canada
• 1986, awarded a Killam Prize by the University of British Columbia
• 1990, awarded the Logan Medal by the Geological Association of Canada
• post humus, the Richard Lee Armstrong Endowment Fund, an endowed scholarship, was established at the Department of Earth Sciences, University of British Columbia
• post humus, a new radiogenic isotope laboratory was dedicated to his memory by the University of British Columbia

Often cited papers

• Armstrong, R.L.. 1966. K-ar dating of plutonic and volcanic rocks in orogenic belts: Age determination by potassium argon: Heidelberg, Springer-Verlag, p. 117-133.
• Armstrong, R.L.. 1968. A model for Pb and Sr isotope evolution in a dynamic earth: Reviews of Geophysics, v. 6, p. 175-199.
• Armstrong, R.L.. 1972. Low-angle faults, hinterland of the Sevier orogenic belt, eastern Nevada and western Utah: Geological Society of America Bulletin, v. 83, p. 1729-1754.
• Armstrong, R.L.. 1981. Radiogenic isotopes; The case for crustal recycling on a near-steady-state no-continental-growth Earth: Royal Society of London Philosophical Transactions, v. 301, p. 443-472.
• Armstrong, R.L, Parrish, R.. 1990. A geologic excursion across the Canadian Cordillera near 49°N (Highways 1 and 3 from Vancouver to southwestern Alberta and on to Calgary, Alberta): Geological Association of Canada Meeting, Vancouver, May, Field Trip Guidebook, 71 p.
• Harland, W.B.; Armstrong, R.L.; Cox, A.V.; Craig, L.E.; Smith, A.G.; Smith, D.G., 1990. A Geologic Time Scale, 1989 edition. Cambridge University Press: Cambridge, p.1-263. ISBN 0-521-38765-5

See also

• Age of the Earth

References

• Geosociety Newsletter- March 1993
• Geolog- Spring 2003
• Mineralogical Association of Canada- Dr Edward Dale Ghent

External links

• History of the Canadian Cordillera
• UBS Earth and Ocean Sciences Donations
• Isotope Geochemistry

Persondata
Name	Armstrong, Richard Lee
Alternative names
Short description
Date of birth	August 4, 1937
Place of birth	Seattle, Washington, USA
Date of death	August 9, 1991
Place of death	Vancouver, British Columbia, Canada