Ancient diamond preserves evidence of water-bearing mineral deep in Earth's mantle
A team of Brazilian researchers discovered the first direct evidence that goethite—the mineral responsible for the brown color of soils—can withstand extreme pressures and temperatures all the way to the planet's interior inside a diamond just 3 millimeters (0.1 inch) long, withi
The discovery of goethite inclusions within an ancient diamond provides a unique window into the Earth's mantle, revealing that water-bearing minerals can exist at extreme depths. This finding has significant implications for our understanding of the Earth's internal dynamics, particularly in regards to the transport of water and minerals throughout the planet. The fact that goethite, a mineral typically associated with soil and weathering processes, can withstand pressures and temperatures found in the Earth's mantle suggests that the boundary between the Earth's surface and interior is more fluid than previously thought.
The presence of goethite in the diamond also highlights the complex geological history of the Earth's mantle, where minerals and rocks are subjected to intense heat and pressure, causing them to transform and interact in complex ways. For engineers, this discovery may have implications for the development of new materials and technologies that can withstand extreme environments, such as advanced ceramics or composites for aerospace applications. Furthermore, understanding the behavior of water-bearing minerals in the Earth's mantle can inform the development of more efficient methods for extracting minerals and resources from the Earth's interior.
As researchers continue to study the properties and behavior of minerals like goethite under extreme conditions, we can expect to gain a deeper understanding of the Earth's internal dynamics and the interactions between the planet's surface and interior. To watch next: further analysis of the diamond and its inclusions, as well as experiments designed to replicate the conditions found in the Earth's mantle and test the limits of other minerals. The intersection of materials science, geology, and planetary science is likely to yield exciting new discoveries and insights in the years to come.
Originally reported by phys.org. EngineeringNews adds analysis for science & discovery readers.