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Chemical geodynamics

Tracking mantle depletion

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Extraction of the continental crust has left the Earth's mantle depleted in certain elements. Some rocks from the Arctic Ocean floor suggest that the extent of depletion and heterogeneity in the Earth's mantle may be greater than we thought.

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Figure 1: At mid-ocean ridges the underlying oceanic mantle rises up to fill the void left by diverging plates, and the mantle rocks melt as the pressure decreases (triangular region in the inset.

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Authors and Affiliations

  1. Andreas Stracke is in the Institute of Isotope Geochemistry and Mineral Resources, ETH Zürich, Clausiusstrasse 25, 8092 Zürich, Switzerland. stracke@erdw.ethz.ch,

    Andreas Stracke

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  1. Andreas Stracke
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Stracke, A. Tracking mantle depletion. Nature Geosci 1, 215–216 (2008). https://doi.org/10.1038/ngeo163

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