Ancient Cosmic Impact May Explain Formation of Carbonado Black Diamonds Deep Within Earth’s Mantle

A New Theory on the Origin of Carbonado Black Diamonds

According to НВ — Техно: Scientists are proposing a fresh perspective on how carbonado black diamonds might have formed deep in the Earth’s mantle. According to this theory, carbon transported into the mantle by a prehistoric cosmic collision could be the source of these rare diamonds. Researchers examined carbonado samples from Brazil’s Tombador formation, focusing on their carbon composition and internal structure. Although the findings are promising, the hypothesis remains unproven due to a lack of concrete evidence for an ancient cosmic impact and the absence of mineral inclusions indicating material transfer from Earth’s crust to the mantle.

Carbonados are distinctive porous black diamonds comprised of numerous tiny crystals, predominantly found in Brazil and Central Africa. In this study, scientists employed X-ray scanning and electron microscopy to analyze the samples. Notably, no signs of shock metamorphism typically associated with impact events were detected. The samples also featured a thin anatase layer-a titanium dioxide mineral-formed prior to the development of a smooth, glassy surface.

How Carbonado Diamonds May Have Formed

Carbon isotope analysis revealed that most samples contain carbon derived from ancient biological material. One crystal showed intermediate isotopic features, suggesting a mixed carbon origin. The transformation of carbon into diamonds requires deep burial beneath Earth’s surface, which the researchers hypothesize could have occurred through rapid subduction triggered by a cosmic impact, driving organic-rich sediments into the mantle. Under intense mantle pressures, some of this carbon crystallized into diamonds, later transported closer to the surface by ascending magma.

The proposed sequence of events leading to carbonado formation is as follows:

• A cosmic impact induced rapid subduction, pushing carbon-rich sediments into the mantle.
• Extreme pressure in the mantle converted this carbon into diamonds.
• Magma uplift, combined with weathering and erosion, fragmented the rock and deposited the diamonds into sedimentary layers.

“The formation of the glassy surface must have occurred after the deposition of this mineral.”

- Attila Demény

Minerals filled the pores within the carbonados, and subsequent fluid interactions likely altered their surfaces. Yet, direct proof linking a cosmic impact to carbonado formation has not been found, making confirmation of this theory challenging.

This innovative hypothesis could significantly reshape our understanding of diamond genesis and the influence of extraterrestrial events on Earth's geological history. Confirming this theory through further research might open new avenues for studying not only black diamonds but also the planet’s evolutionary past. Investigations into these processes remain crucial for uncovering the origins and development of Earth's natural resources.

As researchers delve deeper into the origins of carbonado black diamonds, understanding cosmic events becomes increasingly significant. This exploration resonates with recent theoretical insights suggesting the existence of primordial black holes in a fifth spatial dimension. Such groundbreaking concepts could reshape our understanding of cosmic phenomena and their influence on Earth. To learn more about these intriguing theories, visit the potential implications of black holes in higher dimensions.