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#meteorite

3 posts3 participants1 post today

Meteorite Market Trends. 🧵 ☄️

This will be an ongoing mega-thread that will be updated regularly.

If you have an interest in collecting #meteorites, please bookmark this thread for future reference.

This idea was inspired by my original meteorite mentor, Michael Blood. Michael penned a similar monthly column for Meteorite Magazine back in the aughts, and I hope to continue the tradition of offering regular insights on trends in the meteorite collecting community.

www.nature.comPerihelion history and atmospheric survival as primary drivers of the Earth’s meteorite record | Nature AstronomyModels predict that more than half of all impacting meteoroids should be carbonaceous, reflecting the abundance of carbon-rich asteroids in the main belt and near-Earth space. Yet carbonaceous chondrites represent only about 4% of meteorites recovered worldwide. Here we analyse 7,982 meteoroid impacts and 540 potential meteorite falls from 19 global observation networks and demonstrate that intense thermal stress at low perihelion distances coupled with the filtering effect of Earth’s atmosphere explains this mismatch. Meteoroids repeatedly subjected to intense thermal cycling near the Sun fracture and weaken, removing the most friable objects even before atmospheric entry. Our data also show that tidally disrupted meteoroid streams produce especially fragile fragments that rarely survive to the ground. Consequently, compact, higher-strength, thermally cycled bodies dominate the meteorite record. These findings reconcile the predicted carbonaceous flux with its scarcity in collections, underscoring how orbital evolution and atmospheric filtering shape the materials that reach Earth’s surface. Thermal stress near the Sun and Earth’s atmosphere remove weaker meteoroids, explaining the rarity of carbon-rich meteorites despite abundant carbon-rich asteroids, thus resolving a long-standing mismatch in Earth’s meteorite record.

6-Mar-2025
World’s oldest impact crater found, rewriting #Earth’s ancient history

The team from Curtin’s School of Earth and Planetary Sciences and the Geological Survey of Western #Australia (GSWA) investigated rock layers in the North Pole Dome — an area of the #Pilbara region of #WesternAustralia — and found evidence of a major #meteorite impact 3.5 billion years ago.

eurekalert.org/news-releases/1 #science #astrobiology #geology

Archaeologists have unearthed 2,700-year-old jewelry in Poland crafted from rare ataxite meteorite iron, revealing an ancient connection to the cosmos. This discovery suggests early iron processing skills and could represent the oldest examples of patterned iron, predating Damascus steel.

@goodnews

#GoodNews #Archaeology #Meteorite #AncientCraftsmanship
thedebrief.org/2700-year-old-m

The Debrief · 2,700-Year-Old Meteorite Jewelry Unearthed in Poland Reveals Ancient Connection to the CosmosScience, Tech and Defense for the Rebelliously Curious.