All articles tagged with #geochemistry
Geochemical analysis of calcium carbonate deposits in Pompeii’s wells, baths, and aqueducts shows a shift from polluting deep wells to a stable aqueduct supply; pollutants in Republican Baths reveal inconsistent refilling, while the aqueduct era likely improved hygiene before the AD 79 eruption.
A new study suggests that the two massive structures beneath Earth's surface, known as LLSVPs, are remnants of the planet's early magma ocean, formed by chemical interactions with the core during Earth's formation, which could reshape our understanding of Earth's deep interior and its habitability.
MIT researchers discovered rare chemical signatures in ancient rocks that suggest they are remnants of the original proto Earth, predating the giant impact that shaped our planet, providing new insights into Earth's earliest composition and the solar system's formation.
Researchers discovered South African diamonds with contrasting inclusions of oxidized and reduced materials, challenging existing theories of diamond formation and deep Earth chemistry, and suggesting oxidized materials exist deeper in the mantle than previously thought.
Scientists discovered two diamonds from South Africa containing contrasting inclusions that reveal new insights into deep Earth chemistry, showing that oxidized and reduced materials can coexist at depths of 280-470 km, challenging previous assumptions about mantle oxidation states.
A new study suggests that Earth's continents began forming much earlier than previously thought, with evidence of active plate tectonics and crust recycling during the Hadean eon, based on chemical analysis of ancient crystals and geodynamic models.
The article explains hydrothermal ore formation, focusing on how supercritical fluids from magma chambers create deposits like pegmatites and hydrothermal veins, which contain valuable minerals such as gold, lithium, and rare-earth elements, and discusses their significance both on Earth and potentially on other rocky bodies in the solar system.
Scientists analyzed air trapped inside 815-million-year-old rock salt, revealing that Earth's ancient atmosphere had about 10-13% oxygen, roughly half of today's level, providing new insights into early Earth's conditions and the evolution of life.
A new study suggests that subduction and continental crust formation on Earth began hundreds of millions of years earlier than previously believed, during the Hadean Eon, indicating a more active early Earth than traditionally thought.
Scientists have discovered that a significant portion of Earth's missing nitrogen is likely stored in its core, having been sequestered during the planet's early magma ocean phase due to nitrogen's strong affinity for iron under high pressure, which explains the low nitrogen levels in Earth's mantle and helps understand planetary formation and habitability.
Scientists have used advanced computer modeling to simulate Earth's first days, revealing that the planet's mantle retained a molten, magma ocean for hundreds of millions of years, leaving chemical and seismic signatures that inform our understanding of Earth's formation and evolution, and providing insights applicable to other rocky planets.
Scientists have identified two meteorites that may originate from Mercury, offering potential insights into the planet's composition and history, although definitive proof remains elusive and further research, including data from the BepiColombo mission, is needed.
A new study suggests that Earth's core is leaking small amounts of gold and other heavy metals into the mantle, which then reach the surface through volcanic activity like Hawaii's islands, providing evidence of core-mantle interaction and potential sources of Earth's gold supply.
Researchers have found evidence that Earth's core is leaking gold and other precious metals into the mantle, with some of these metals, including ruthenium, migrating to the surface and enriching volcanic rocks like those in Hawaii, challenging previous assumptions about the core's isolation.
A new study provides evidence that a massive superplume of hot mantle rock beneath Africa is driving the continent's volcanic activity and rifting, originating from the core-mantle boundary and causing widespread geological fractures.