Abstract
We present a brief overview of meteorites from the north-eastern India, with a focus on falls, finds, and research developments. To date, out of a total 150 numbers of meteorites fall/find in India (in Meteoritical Bulletin Database), only six meteorites from north-eastern region have received official international recognition from the Nomenclature Committee of the Meteoritical Society. Among these six meteorites, 2 finds and 4 falls, including one ureilite, two H chondrites and three L chondrites. The first meteorite from north-eastern India (Assam L5, Find) was documented in 1846. After a lack of 153 years, the first fall (Sabrum LL6 chondrite) was documented in 1999. The most recent fall is Kamargaon (L6) chondrite in 2015. Intensively researched meteorites of this region are Goalpara and Dergaon. The reported most massive meteorite of north-eastern India is Mahadevpur (H4/5) chondrite, 70.5 kg of total known weight, and the rest are
Highlights
Rocks of extraterrestrial origin that penetrate the atmosphere and reach the Earth’s surface are called meteorites
We present a brief overview of meteorites from the north-eastern India, with a focus on falls, finds, and research developments
The broad objectives of the meteorite studies are to understand the chemical and isotopic composition of the “solar nebula” that evolved to form the solar system objects, formation of the solar system, various physicochemical processes involved to their time scales and the present state of the solar system, connection of solar system with stellar environment, evolution of terrestrial planets including Earth, and to explore the origin and evolution of life and the dynamical processes involved in the meteorite delivery to Earth
Summary
Rocks of extraterrestrial origin that penetrate the atmosphere and reach the Earth’s surface are called meteorites. The broad objectives of the meteorite studies are to understand the chemical and isotopic composition of the “solar nebula” that evolved to form the solar system objects, formation of the solar system, various physicochemical processes involved to their time scales and the present state of the solar system, connection of solar system with stellar environment, evolution of terrestrial planets including Earth, and to explore the origin and evolution of life and the dynamical processes involved in the meteorite delivery to Earth. The fall and find of meteorite recovery rate in the north-eastern region of India is very low, yet some very special finds have been recovered (e.g. Goalpara). Is a quick chronological survey of all meteorites from north-east India, including some of the most extensively-researched examples, with emphasis on the subjects of research in this field. It is worthwhile to mention that, out of 150 documented meteorites from India (to date), only six meteorites have been officially recognized by Nomenclature Committee of the Meteoritical Society from north-eastern region of India with various sizes and chemical classes
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