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Aubrite Meteorite

2023 FEB 15

Preliminary   > Geography   >   Cosmology   >   Cosmology

Why in news?

  • The Diyodar Meteorite that crashed in Gujarat in 2022 is a rare aubrite, seen in India just once before in 1852.

About Aubrite Meteorite:

  • Aubrites are a type of meteorite that are coarse-grained igneous rocks formed in poor-oxygen conditions, and thus contain a variety of exotic minerals that are not found on Earth.
  • For example, the mineral heideite was first described in the Basti meteorite.
  • They are named after the Aubres meteorite, which fell in France in 1836.
  • Around 90% of the Diyodar meteorite was composed of orthopyroxene.
    • Pyroxenes are silicates consisting of single chains of silica tetrahedra. Orthopyroxenes are pyroxenes with a certain structure.
    • Rocks with pyroxene have also been used to make crushed stone that is used in construction.

Add ons:

  • When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors.
  • When a meteoroid survives a trip through the atmosphere and hits the ground, it's called a meteorite.

PRACTICE QUESTION

The term ‘Aubrite’, recently seen in news, refers to:

(a) A synthetic fiber

(b) A type of coral

(c) A type of meteorite

(d) Geological formation found in Antarctica

Answer

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