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12 - Deep Carbon

Cycles, Reservoirs and Fluxes

Published online by Cambridge University Press:  19 December 2020

Simon Mitton
Affiliation:
University of Cambridge
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Summary

This chapter completes the story of the acceptance of plate tectonics, which marks the beginning of the modern period of Earth system science. This final approval required additional contributions by several researchers, with the key papers being published in 1968. Jason Morgan’s work on crustal blocks, of which he had given an impromptu preview at the American Geophysical Union in April 1967, proposed that on Earth’s dynamic surface 20 crustal blocks move relative to each other, endlessly jostling for their place in the jigsaw. Simultaneously, Xavier Le Pichon, a young French geophysicist who worked with the Ewing brothers at Lamont Geological Observatory from 1963 to 1989, connected the kinematic ideas of Morgan, McKenzie and Parker to the vast data sets held at Lamont, particularly the magnetic profiles. Le Pichon’s computer model demonstrated that the motion of six large rigid blocks completed a jigsaw that covered most of Earth and could accurately account for the evolution of ocean basins. His model of June 1968 indicated that plates do indeed form an integrated system in which the sum of all crust generated along 50,000 kilometres of ocean ridges equals the cumulative amount destroyed in the subduction zones.1

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  • Deep Carbon
  • Simon Mitton, University of Cambridge
  • Book: From Crust to Core
  • Online publication: 19 December 2020
  • Chapter DOI: https://doi.org/10.1017/9781316997475.014
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  • Deep Carbon
  • Simon Mitton, University of Cambridge
  • Book: From Crust to Core
  • Online publication: 19 December 2020
  • Chapter DOI: https://doi.org/10.1017/9781316997475.014
Available formats
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Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Deep Carbon
  • Simon Mitton, University of Cambridge
  • Book: From Crust to Core
  • Online publication: 19 December 2020
  • Chapter DOI: https://doi.org/10.1017/9781316997475.014
Available formats
×