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news Chemistry Evidence status: Peer reviewed · Measurements of volcanic samples

Earth’s core carbon may be isotopically heavy, Hawaiian lava droplets suggest

Melt droplets in Kīlauea lavas carry carbon at −1‰ versus −7‰ for normal mantle. A PNAS team reads it as core carbon from outer solar system meteorites.

What it does not show The heavy carbon is measured; that it came from Earth's core is the authors' interpretation, and other sources of heavy plume carbon have been proposed

By Murad Ali Khan 10 min read
Primary sourcesResearch and official data linked in context
Evidence calibratedObservation, interpretation and speculation separated
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