Martian meteorite - Wikipedia
A Martian meteorite is a rock that formed on Mars, was ejected from the planet by an impact event, and traversed interplanetary space before landing on Earth as a meteorite. 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]
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 [update] , 277 meteorites had been classified as Martian, less than half a percent of the 72,000 meteorites that have been classified. [ 1 ]
The Tissint Martian meteorite as evidence for the largest impact ...
2013年1月29日 · Most Martian meteorites are suggested to have been excavated from 3 to 7 km diameter impact craters. Here we show that the Tissint meteorite, a 2011 meteorite fall, contains virtually all...
This Meteorite Just Revealed an Ancient Signal of Water on Mars
6 天之前 · "We dated these minerals in the Martian meteorite Lafayette and found that they formed 742 million years ago. We do not think there was abundant liquid water on the surface of Mars at this time. ... A sample of olivine (green) and iddingsite (brown). (Matt Affolter/Wikimedia Commons, CC BY-SA 3.0) The findings place new constraints on the known ...
The Source Crater of Martian Shergottite Meteorites | Science
2014年3月6日 · We show that the <5 million-year-old and 55-km-wide Mojave Crater on Mars is the ejection source for the meteorites classified as shergottites. Shergottites and this crater are linked by their coinciding meteorite ejection ages and the crater formation age and by mineralogical constraints.
What Martian Meteorites Reveal About the Interior and Surface …
2020年11月20日 · Martian meteorites display a wide range in mineralogy and chemistry, but are predominantly basaltic in composition. Over the past 6 years, the number of martian meteorites recovered has almost doubled allowing for studies that …
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.
Solved: The Mystery of the Martian Meteorites - Scientific American
2013年7月26日 · According to Tony Irving, a University of Washington geochemist who first identified NWA 5298’s Martian provenance, a desert nomad discovered the meteorite in 2008 outside the Moroccan village...
Martian meteorites and Martian magnetic anomalies: A new perspective ...
2014年7月14日 · Among the 25 unpaired Martian meteorites studied to date, NWA 7034 has a unique magnetic mineralogy. It contains about 15 wt % of iron oxides as magnetite that has experienced cation substitution and partial alteration to maghemite, with about a quarter of the oxides being pure maghemite.
Feature: A castaway from ancient Mars - Science | AAAS
2014年11月25日 · It is the oldest rock from Mars and chock-full of the planet's primordial water. Most intriguing of all, it appears to be the first martian meteorite made of sediment, deposited by wind or water.