* Astronomy

Title: Preliminary Study of Chaves Howardite
Authors: Monteiro, J. F.

The Chaves meteorite fell on May 3, 1925 in the small village of Vilarelho da Raia, situaded 8 Km North of Chaves town (Portugal) and less than 1 Km with the Spain border. The fall was accompainied by two very strong explosition sounds followed by a noise resembling that of a cannon fire. Three fragments were recovered by the local authorities with a total mass of 2945g. All stones have a shiny dark brownwish-black crust, which is fissured and present areas of striated crust. In the broken surfaces, where the samples are void of fusion crust, light to dark gray interior material is exposed. In addition to a light grey groundmass containing angular fragments varying from white to greenish and sometimes grey pyroxenes, the meteorite shows ophitic texture with white plagioclases, which are up to 9 mm long.

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