Lavas from hotspots - -whether erupting in Hawaii, Samoa or Iceland -- likely originate from a worldwide, uniform reservoir in Earth's mantle, according to an evaluation of volcanic hotspots.
Lavas from hotspots - -whether erupting in Hawaii, Samoa or Iceland -- likely originate from a worldwide, uniform reservoir in Earth's mantle, according to an evaluation of volcanic hotspots.
Research of Earth's mantle has been complicated by the fact that it can't be sampled directly. Scientists instead have to engage in a bit of geoscientific detective work; they study this important part of our planet through trace-element and isotope analysis of lava that comes from the mantle and is erupted at oceanic volcanoes around the world.
Knowing what the mantle is made of is central to our understanding of how our planet formed and how the mantle has developed over time. It may also provide clues as to why the mantle behaves the way it does, how it drives plate tectonics, and what its role is in the global cycle of elements. "This model explains the observations in a simple way and permits a myriad of new hypotheses for global geochemical research going forward," said Dr. Kooijman.Geophysicists find link between seismic waves called PKP precursors and anomalies in Earth's mantle that are associated with hotspots associated with volcanism on the ...
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