Angrites are a rare group of achondrites consisting mostly of Al-Ti bearing diopside, hedenbergite, olivine, anorthite and troilite with minor traces of phosphate and metals. The group is named for the Angra dos Reis meteorite. They are the oldest igneous rocks, with crystallization ages of around 4.56 billion years.

Sep 1, 2012 · Angrites are medium- to coarse-grained (up to 2–3 mm), unbrecciated and substantially unshocked igneous rocks of roughly basaltic composition.

Nov 11, 2021 · Angrites are igneous rocks characterized by subequal abundances of olivine, pyroxene and plagioclase. The compositions of the major mineral phases are unusual. Olivine is calcium-bearing, and frequently contains inclusions or exsolution lamellae of kirschteinite.

This is 1 of 43 approved meteorites classified as Angrite. Search for specimens in the Smithsonian Institution collection (U.S.): Search for this meteorite in the Natural History Museum collection (U.K.): Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)

Oct 18, 2022 · A petrographic thin section micrograph of an angrite primarily composed of augite, olivine, and plagioclase. Credit: Meteorite Times Magazine. Angrites are olivine-bearing, basaltic meteorites that originate from a volatile-depleted planetesimal.

Apr 15, 2025 · A new study of a rare basaltic meteorites called angrites suggests that volatiles, which are compounds with relatively low boiling points such as water, could have been brought to our planet by meteorites during the first two million years of the Solar System.

NASA -supported scientists have revealed new information about the early history of the Solar System, including the formation of rocky planets like Earth, by studying a class of stony meteorites known as Angrites. Angrites are a rare group of meteorites that are named for the Angra dos Reis meteorite that fell in Brazil in 1869.

Angra dos Reis is a unique igneous rock that is largely composed of the rare pyroxene fassaite, an aluminium-titanium diopside. During the last two decades, a handful of similar fassaite-rich meteorites have been recovered, leading to the establishment of the angrite group, presently comprising six members.

Angrites (Synonyms: fassaite achondrites) General: The meteorites of this group are named for their type specimen, Angra Dos Reis, a fassaite-rich achondrite that fell near Rio de Janeiro, Brazil, in early 1869. During the last three decades, a few similar achondrites have been found, leading to the establishment of this most interesting group.

Angrite (slice, 2.4 cm across), NWA 2999 Meteorite. This angrite was discovered in 2004 in Northwest Africa. Based on chemical and physical similarities, this meteorite has been paired with the NWA 3164, NWA 4662, and NWA 4931 Meteorites. The …