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The Allende meteorite is the largest carbonaceous chondrite ever found on Earth. The fireball was witnessed at 01:05 on February 8, 1969, falling over the Mexican state of Chihuahua . [ 1 ] After it broke up in the atmosphere , an extensive search for pieces was conducted and over 2 tonnes (2.2 tons) were recovered.
Some carbonaceous chondrites, such as the Allende meteorite, contain calcium-aluminum-rich inclusions (CAIs). These are compounds that emerged early from the primeval solar nebula, condensed out and represent the oldest minerals formed in the Solar System. [3] [4]
The Allende meteorite has shown to be full of new minerals, after nearly forty years it has produced one in ten of the now known minerals in meteorites. [2] This CV3 carbonaceous chondrite was the largest ever recovered on earth and is referred to as the best-studied meteorite in history. [2] The inclusion has only been viewed via electron ...
Fluid inclusions containing meteorite water have long been reported; [66] [67] [68] however, these claims were doubted due to, e. g., contamination by cutting fluids during sectioning. [ 69 ] [ 70 ] More modern claims have taken steps such as waterless preparation.
A.S. Kornacki, J.A. Wood (1984) The mineral chemistry and origin of inclusion matrix and meteorite matrix in the Allende CV3 chondrite. GeCoA, Vol. 48, 1663–1676; A.S. Kornacki, J.A. Wood (1985) The identification of group II inclusions in carbonaceous chondrites by electron probe microanalysis of perovskite. Earth and Planetary Science ...
Analyzing the chemical composition of the meteorite’s 4.45 billion-year-old zircon grain — a mineral that is typically only a few millimeters in size and formed in rocks that have been altered ...
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The Weaubleau structure is a probable meteorite impact site in western Missouri near the towns of Gerster, Iconium, Osceola, and Vista. It is believed to have been caused by a 1,200-foot (370 m) meteoroid between 335 and 340 million years ago [ 1 ] during the middle Mississippian Period (Latest Osagean to Earliest Meramecian ).