A large-scale isotope anomaly in the Southern Hemisphere mantle
SR Hart - Nature, 1984 - nature.com
Nature, 1984•nature.com
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.
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.
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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