'A diamond is forever.' That iconic slogan, coined for a highly successful advertising campaign in the 1940s, sold the gemstones as a symbol of eternal commitment and unity.
– to forensically examine the link between continental breakup and kimberlite volcanism. The results of our global study showed the eruptions of most kimberlite volcanoes occurred 20 to 30 million years after the tectonic breakup of Earth's continents.
, a small region of the continental root – areas of thick rock located under some continents – is disrupted and sinks into the underlying mantle.edge-driven convection Our models show that while sweeping along the continental root, these disruptive flows remove a substantial amount of rock, tens of kilometres thick, from the base of the continental plate.
However, our research clearly shows that the spatial, time-based and chemical patterns observed in most kimberlite-rich regions can't be adequately explained solely by the presence of plumes.
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