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A large-scale isotope anomaly in the Southern Hemisphere mantle

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Abstract

Basalts from many Southern Hemisphere regions have anomalous Sr and Pb isotopic characteristics. This article shows that the isotopic mantle anomaly is globe-encircling in extent, centred on latitude 30° S. Arguments suggesting that this mantle anomaly has been in existence for billions of years place severe constraints on mantle convection models.

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Authors and Affiliations

  1. Center for Geoalchemy, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA

    Stanley R. Hart

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  1. Stanley R. Hart
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Hart, S. A large-scale isotope anomaly in the Southern Hemisphere mantle. Nature 309, 753–757 (1984). https://doi.org/10.1038/309753a0

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