Earth’s Core May Be Leaking Gold and Rare Metals, Scientists Reveal

In a groundbreaking study, scientists have found compelling evidence that Earth’s core may be slowly leaking gold and other precious metals into the planet’s upper layers. The discovery could reshape our understanding of Earth’s internal dynamics and its long-term geochemical evolution.

For decades, experts believed that nearly all of Earth’s gold was locked deep within its molten core, formed around 4.5 billion years ago during the planet’s formation. However, new research examining volcanic rocks from Hawaii suggests that this precious metal—and others like it—may be reaching the surface during volcanic activity.

Researchers analyzing Hawaiian basalt, created by upwelling magma plumes, have detected traces of heavy and rare metals typically associated with Earth’s core. These findings challenge the long-held view that the core is entirely sealed off from the mantle above it.

Geochemist Nils Messling, quoted by CNN, explained, “About 40 years ago, people first came up with the theory that maybe the core is losing some material into the mantle, but the signals we got so far were really ambiguous. Now, in my opinion, we have the first very strong evidence that some of the core is actually ending up in the mantle.”

Messling and his team carried out a detailed analysis of half a kilogram of volcanic rock, pulverizing it into powder before using chemical processes to extract rare platinum-group elements, particularly ruthenium—a metal as rare as gold and believed to primarily exist in the Earth’s core.

The process of metal leakage is incredibly slow, but when considered over billions of years, its impact could be significant. Messling noted that while the effect may seem negligible on a single volcanic island, on a planetary scale across geological time, it could alter Earth’s overall composition.

The Earth’s core consists of a solid inner portion composed of iron and nickel—roughly 70% the size of the Moon—and a liquid outer core extending nearly 1,800 miles beneath the surface. This study adds a new layer of complexity to our understanding of how the core interacts with the mantle and influences surface geology.

The possibility of precious metals like gold migrating from deep Earth to accessible locations near volcanic zones has excited researchers, offering hope that new sources of these rare elements could emerge over time.