forbes.com
Earth's Core Leaks Gold: Evidence from Hawaiian Lava
Researchers discovered evidence that some of Earth's gold originates from the core, using rubidium-100 isotope ratios in Hawaiian lava as a tracer for core material that rises to the surface via mantle plumes, forming gold-bearing magmas and deposits.
- What evidence confirms the theory that Earth's core leaks gold and other precious metals into the mantle?
- A new study reveals that some of Earth's gold supply originates from the core, transported via mantle plumes. Researchers found high rubidium-100 isotopes in Hawaiian lava, a tracer indicating core material. This core material, containing gold and other precious metals, mixes with sulfur in the mantle to form mobile complexes that rise to the surface.
- What are the long-term implications of this discovery for gold exploration and our understanding of Earth's internal dynamics?
- This discovery significantly enhances our understanding of precious metal deposit formation. By identifying rubidium-100 as a tracer, researchers can better pinpoint areas where core-derived materials are rising. Future research can leverage this to identify potential new gold deposits, improving exploration efficiency.
- How does the interaction between core-derived materials and sulfur in the mantle facilitate the formation of mineable gold deposits?
- The study challenges the assumption of a completely isolated core, showing that core material, including gold, leaks into the mantle. The unusually high rubidium-100 in Hawaiian lava samples proves the core-mantle interaction. This core leakage, in conjunction with sulfur, facilitates gold transport to the surface, forming mineable deposits.
Cognitive Concepts
Framing Bias
The framing is largely positive, highlighting the significance of the discovery and its implications for understanding precious metal formation. The quotes from the researchers contribute to this positive framing. However, the overall presentation remains largely objective.
Language Bias
The language used is largely neutral and scientific. Terms like "surprisingly common" might be considered slightly subjective, but are used within the context of scientific comparison. The researchers' enthusiasm ("literally struck gold") is presented transparently as a quote, not presented as an objective scientific statement.
Bias by Omission
The article focuses on the study's findings and doesn't delve into potential counterarguments or alternative hypotheses regarding the origin of precious metals. While acknowledging debate about mantle plumes, it doesn't extensively explore dissenting viewpoints on the core-mantle interaction.
Sustainable Development Goals
The study's findings could lead to more efficient and sustainable gold mining practices, potentially reducing the environmental and social impacts associated with gold extraction and distribution. Improved understanding of gold deposit formation could help target exploration efforts towards areas with higher concentrations, reducing the need for extensive mining in other areas. This could help minimize land use conflicts and environmental damage, leading to a more equitable distribution of resources and benefits.