Dan McKenzie (professor)

Infobox Scientist
name = Professor Dan McKenzie
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|birth_date = 1942
birth_place = Cheltenham
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nationality = British
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field = Geophysics
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doctoral_advisor = Teddy Bullard
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influences = Walter Munk, Don L. Anderson
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Daniel (Dan) Peter McKenzie, CH, FRS (b. 1942) is a Professor of Geophysics at Cambridge University, and one-time head of the Bullard Laboratories. He wrote the first paper defining the principles of plate tectonics, and his early work on mantle convection created the modern discussion of planetary interiors.

Early life

Born in Cheltenham 1942, the son of an Ear Nose and Throat surgeonMacfarlane, A. & Harrison, S. (2007) "An interview with Dan McKenzie" [http://www.dspace.cam.ac.uk/handle/1810/194181?mode=full] ] , he first attended Westminster Under School and later Westminster School, London.

Education and Career

Dan McKenzie attended King's College, Cambridge where he read Physics, obtaining a 2:1 in his final degree.

As a graduate student, he worked with Edward "Teddy" Bullard who suggested he work on the subject of thermodynamic variables. He was awarded a Research Fellowship at King's College at the beginning of his second year which enabled him to study anything he wanted. As such, he gave up doing what Teddy had suggested and became interested in how the interior of the earth convects, something completely speculative at that time. McKenzie taught himself fluid mechanics and then went to the Scripps Oceanography Institute at the University of California, San Diego, on the invitation of Freeman Gilbert and Walter Munk. After eight months he returned to the Cambridge, submitting his PhD in 1966. He has since said that nothing in his early life as a scientist had such a profound effect on him as those eight months in California. [American Geophysical Union "McKenzie Receives 2001 William Bowie Medal" [http://www.agu.org/inside/awards/bios/mckenzie_dan.html] ]

Plate Tectonics

Spending time between Cambridge and a Fellowship held in Caltech, Dan was invited, along with with Teddy Bullard, to a conference in New York which initiated his revolutionary work on plate tectonics. After listening to separate talks from Fred Vines and Lynn Sykes he came back to Cambridge and started work on the first paper to be published on plate tectonics, [McKenzie, D., 1966 The viscosity of the lower mantle. J geophys. Res. 71, 3995-4010] looking at the thermal structure of oceanic plates as they formed and cooled.

Following this, he published a seminal paper with Bob Parker [McKenzie, D. & Parker, R. L., 1967 The North Pacific: an example of tectonics on a sphere. Nature 216, 1276-1280] , which employed the Euler Theorem, in conjunction with magnetic anomalies and earthquakes to determine a precise mathematical theory on plate tectonics. This work was published some 3-4 months after the same work had been carried out by Jason Morgan at Princeton. Allegations were subsequently made suggesting that McKenzie was at Morgan's spring AGU talk where he presented his plate tectonics work. Later in 1968 he went to Princeton where he found that he and Morgan had solved two or three problems using identical mathematics in exactly the same way – plate tectonics was one, another was the thermal structure of the oceans and another was looking at earthquake mechanisms in a different way to seismologists.

Working with John Sclater, McKenzie determined the entire geological history of the Indian Ocean, the publication [McKenzie, D. & Sclater, J. G., 1971 The evolution of the Indian Ocean since the late Cretaceous. Geophys. J. R. astr. Soc. 25, 437-528] of which eventually resulted in them both receiving Fellowships at the Royal Society.

Mantle Convection and Sedimentary Basins

McKenzie was awarded a University position and took it up in 1971. At this point he decided to move away from plate tectonics, choosing instead to focus on the behavior of fluids below the plates. He studied cellular convection and motions in the mantle whilst at the same time pursuing yet another new avenue of research; the development of sedimentary basins. It was from this work that he produced a classic paper [McKenzie, D., 1978 Some remarks on the development of sedimentary basins. Earth planet. Sci. Lett. 40, 25-32.] that has been widely accepted by oil companies as the "McKenzie Model of Sedimentary Basins."

McKenzie was elected a Fellow of the Royal Society in 1976 at just 34 years of age, and by 1978 was awarded a University Readership position.

Later career

Dan McKenzie continues to work at the Bullard Laboratories in Cambridge where he holds a Royal Society Research Professorship, awarded in 1996. Most recently his research has provided new insights into the tectonic evolution of Mars and Venus.

In 2002 he was awarded the prestigious Crafoord Prize from the Royal Swedish Academy of Sciences for his contributions to research in the field of plate tectonics, sedimentary basin formation and mantle melting.

Selected Bibliography

* McKenzie, D., Nimmo, F., Jackson, J., Gans, P. B. & Miller, E. L. 2000 Characteristics and consequences of flow in the crust. J. geophys. Res. 105, 11029-11046.
* McKenzie, D. & Fairhead, D. 1997 Estimates of the effective elastic thickness of the continental lithosphere from Bouguer and free air gravity anomalies. J. geophys. Res. 102 27523-27552.
* Jackson, J. A. & McKenzie, D., 1988 The relationship between plate motions and seismic moment tensors, and the rates of active deformation in the Mediterranean and Middle East. Geophys. J. R. astr. Soc. 93, 45-73.
* Bickle, M. J. & McKenzie, D., 1987 The transport of heat and matter by fluids during metamorphism. Contrib. Mineral. Petrol. 95, 384-92.
* Jackson, J. & McKenzie, D., 1983 The geometrical evolution of normal fault systems. J. Structural Geol. 5, 471-82.
* McKenzie, D. & O'Nions, R. K., 1983 Mantle reservoirs and ocean island basalts. Nature 301 229-231.
* England, P. & McKenzie, D., 1982 A thin viscous sheet model for continental deformation. Geophys. J. R. astr. Soc. 70, 295-321.
* McKenzie, D., 1978 Some remarks on the development of sedimentary basins. Earth planet. Sci. Lett. 40, 25-32.
* Parsons, B. & McKenzie, D., 1978 Mantle convection and the thermal structure of plates. J. geophys. Res. 83, 4485-96.
* McKenzie, D., Roberts, J. & Weiss, N. O., 1974 Convection in the Earth's mantle: towards a numerical simulation. J. Fluid Mech., 62, 465-538.
* McKenzie, D., Molnar, P. & Davies, D., 1970 Plate tectonics of the Red Sea and East Africa. Nature 226, 243-8.
* McKenzie, D. & Sclater, J. G., 1971 The evolution of the Indian Ocean since the late Cretaceous. Geophys. J. R. astr. Soc. 25, 437-528.
* McKenzie, D. & Parker, R. L., 1967 The North Pacific: an example of tectonics on a sphere. Nature 216, 1276-1280.
* McKenzie, D., 1966 The viscosity of the lower mantle. J geophys. Res. 71, 3995-4010.

Awards

* Fellow of the Royal Society (FRS), 1976
* Wollaston Medal, Geological Society of London, 1983
* Rutherford Memorial Lecture, 1988
* Awarded a Royal Society Research Professorship, 1996
* Awarded an Honorary DSc from the University of Bristol, 2000
* William Bowie Medal, 2001
* Crafoord Prize Royal Swedish Academy of Sciences,2002
* Order of the Companions of Honour by Queen Elizabeth II, having previously declined a Knighthood [Reference required] , 2003

References

External links

* [http://www.esc.cam.ac.uk/index.php/People/Academic%20Staff/90-mckenzie Personal web page at the Department of Earth Sciences, University of Cambridge]


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