Avanhandava (meteorite)

Avanhandava is an H4 ordinary chondrite meteorite that fell on February 6, 1952, near the town of Avanhandava, São Paulo, Brazil.

Classification and Composition:

Avanhandava is classified as an H4 chondrite. The "H" designation indicates that it contains a high total iron content. The "4" signifies that it experienced moderate thermal metamorphism on its parent asteroid. Its composition consists primarily of chondrules (small, spherical silicate inclusions), metal (iron-nickel alloy), and silicates (olivine and pyroxene). Petrographic analysis confirms the presence of well-defined chondrules with varying textures, indicative of a wide range of cooling rates during their formation. The metal phase typically occurs as disseminated grains and veinlets within the silicate matrix. Minor amounts of troilite (iron sulfide) are also present.

Recovery and Location:

The meteorite was observed to fall and was subsequently recovered near Avanhandava. The fall was well-documented, and samples were quickly collected. The main mass of the meteorite is preserved in scientific collections, allowing for detailed study of its composition and origin. Its fall provides valuable data about the flux of meteorites impacting the Earth and their distribution across the globe.

Significance:

Avanhandava, like other H chondrites, provides valuable insights into the early solar system, the formation of asteroids, and the processes that altered them over time. Its well-documented fall and availability for research make it an important sample for understanding the composition and history of its parent asteroid. Analysis of Avanhandava contributes to our understanding of the processes that formed the building blocks of planets and shaped the inner solar system.