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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.
In addition, they contain water and minerals that have been modified by the influence of water. [2] The carbonaceous chondrites were not exposed to higher temperatures, so that they are hardly changed by thermal processes. Some carbonaceous chondrites, such as the Allende meteorite, contain calcium
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 ...
The Winchcombe meteorite is a rare find, with a similar hydrogen isotope ratio to the water on Earth.. Recovering a meteorite within 12 hours of arrival means it is as pristine a specimen as we ...
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Chondrite meteorite with calcium–aluminium-rich inclusions seen as white specks. A calcium–aluminium-rich inclusion or Ca–Al-rich inclusion (CAI) is a submillimeter- to centimeter-sized light-colored calcium- and aluminium-rich inclusion found in carbonaceous chondrite meteorites.