Martian meteorite - Wikipedia
There are three groups of Martian meteorite: shergottites, nakhlites and chassignites, collectively known as SNC meteorites. Several other Martian meteorites are ungrouped. These meteorites are interpreted as Martian because they have elemental and isotopic compositions that are similar to rocks and atmospheric gases on Mars, which have been ...
Types of Meteorites: Iron, Stone, Stony-Iron, Lunar, Martian - Geology.com
About one hundred different lunar meteorites (lunaites) and approximately thirty Martian meteorites (SNCs) have been discovered on earth, and they all belong to the achondrite group. Impacts on the lunar and Martian surfaces by other meteorites fired fragments into space and some of those fragments eventually fell on earth.
List of Martian meteorites - Wikipedia
This is an incomplete list of Martian meteorites i.e. meteorites that have been identified as having originated from Mars. As of September 2020, 277 meteorites had been classified as Martian, less than half a percent of the 72,000 meteorites that have been classified. [1]
The source craters of the martian meteorites: Implications for the ...
2024年8月16日 · We focus on martian meteorites for which dwell times of shock loading have been estimated from petrological constraints and that span most of the observed range of crystallization and ejection ages for meteorites from Mars, representing the most common types: shergottites/augite-rich shergottites and nakhlites/chassignites .
What Martian Meteorites Reveal About the Interior and Surface of Mars
2020年11月20日 · The shergottites are the most abundant type of martian meteorites, accounting for 89% of the total collection by number and 82% by mass. Shergottites are geochemically classified based on their relative enrichment or depletion in incompatible trace elements (ITE), and these ITE compositions are largely inherited from their mantle sources.
Meteorites: Messengers From Outer Space | Smithsonian National …
There are three main types of meteorites: stony (the most common), stony-iron, and iron. Where Do Meteorites Come From? Most meteorites come from the asteroid belt, a collection of small rocky bodies – they're about 1,000 km (600 miles) or less in diameter – orbiting the Sun between the paths of Mars and Jupiter.
Meteors & Meteorites Facts - Science@NASA
There are three major types of meteorites: the "irons," the "stonys," and the "stony-irons." Although the majority of meteorites that fall to Earth are stony, most of the meteorites discovered long after they fall are irons. Irons are heavier and easier to distinguish from Earth rocks than stony meteorites.
Decoding the Red Planet’s Structure: Insights From Martian Meteorites
2024年5月31日 · Scientists at the Scripps Institution of Oceanography have analyzed Martian meteorites, providing insights into Mars’ mantle and crust structure. These meteorites, originating from volcanic processes similar to those on Earth but with unique characteristics, help us understand Mars’ formation and evolution.
Ages and Geologic Histories of Martian Meteorites
We review the radiometric ages of the 16 currently known Martian meteorites, classified as 11 shergottites (8 basaltic and 3 lherzolitic), 3 nakhlites (clinopyroxenites), Chassigny (a dunite), and the orthopyroxenite ALH84001. The basaltic shergottites represent surface lava flows, the others magmas that solidified at depth.
Martian meteorites – Buseck Center for Meteorite Studies
Martian meteorites are distinguished from Earth rocks and other meteorite types by their chemical and mineral composition, as well as their age. Moreover, gases trapped in shock glass in martian meteorites have been matched to measurements of the martian atmosphere taken by the NASA Viking mission in 1976.