forbes.com
New Mechanism Explains Formation of Gold Deposits in Subduction Zones
A research team discovered that a specific sulfur ion (trisulfur) under high pressure and temperature (50-80km depth) facilitates gold transfer from Earth's mantle into magma rising to the surface via subduction zones, mainly around the Pacific Ocean, leading to gold deposit formation.
- What specific conditions cause the enrichment of gold in magma leading to surface gold deposits?
- A University of Michigan-led research team discovered a new mechanism explaining gold deposit formation. Their numerical model reveals that a specific sulfur ion (trisulfur) under high pressure and temperature (50-80km depth) enables gold transfer from the mantle into magma, rising to the surface via subduction zones. This gold-trisulfur complex is highly mobile in magma.
- What are the potential future impacts of this discovery on gold exploration and resource management?
- This model significantly improves gold deposit exploration. By understanding the precise conditions needed for gold-trisulfur complex formation, researchers can better predict where gold-rich ore deposits are likely to be found, particularly in subduction zones around the Pacific Ocean. This understanding has implications for resource extraction and economic activity.
- How does the newly discovered gold-trisulfur complex contribute to the formation of gold deposits in subduction zones?
- This discovery connects the formation of gold deposits to specific geological conditions in subduction zones. The trisulfur ion, formed under specific pressure and temperature, facilitates the movement of gold from the mantle into magma rising to the surface. This explains why gold deposits are often found near active volcanoes in subduction zones.
Cognitive Concepts
Framing Bias
The framing is largely neutral and focuses on the scientific process and findings. The use of quotes from the lead researcher helps to present the information objectively. The headline accurately reflects the study's main conclusion.
Bias by Omission
The article focuses on the scientific discovery and doesn't delve into potential economic or environmental impacts of gold mining, nor does it discuss alternative perspectives on gold formation theories that may exist. This omission doesn't necessarily indicate bias but limits the scope of the article.
Sustainable Development Goals
The research provides a robust thermodynamic model for gold deposit formation, improving exploration and potentially increasing access to this valuable resource. This contributes to economic growth and infrastructure development, particularly in regions with significant gold deposits.