Shergottites

Definition

Shergottites are a type of Martian meteorite that originated from the surface of Mars. These meteorites provide valuable insights into the geology and geochemistry of the Red Planet, offering a rare opportunity to study the composition and evolution of the Martian crust and mantle.

5 Must Know Facts For Your Next Test

1. Shergottites are the most abundant type of Martian meteorite, comprising over 75% of all known Martian meteorites.
2. These meteorites are named after the town of Shergotty in India, where the first Shergottite was discovered in 1865.
3. Shergottites are characterized by their young age, with most samples dating between 175 and 475 million years old, indicating a relatively recent volcanic activity on Mars.
4. The geochemical composition of Shergottites suggests that they originated from the Martian crust, with a significant contribution from the Martian mantle.
5. Studying the mineralogy and chemistry of Shergottites has provided valuable insights into the thermal and igneous history of Mars, as well as the planet's potential for past or present habitability.

Review Questions

• Describe the significance of Shergottites in understanding the geology of Mars.
  • Shergottites are the most abundant type of Martian meteorite, providing a direct window into the composition and evolution of the Martian crust and mantle. Their young age, between 175 and 475 million years old, suggests relatively recent volcanic activity on the planet, while their geochemical characteristics offer insights into the thermal and igneous history of Mars. Analyzing the mineralogy and chemistry of Shergottites has also contributed to our understanding of the potential for past or present habitability on the Red Planet.
• Explain how Shergottites differ from other types of Martian meteorites, such as Nakhlites and Chassignites.
  • Shergottites are distinct from other Martian meteorites in several ways. While Shergottites are believed to have originated from the Martian crust, with a significant contribution from the mantle, Nakhlites are thought to have formed deeper within the Martian mantle. Chassignites, on the other hand, are even rarer and are believed to have originated directly from the Martian mantle, providing information about the deeper interior of the planet. These differences in the meteorites' sources and compositions allow researchers to study various aspects of Mars' geological history and structure.
• Analyze the implications of the young age of Shergottites for our understanding of the geological processes on Mars.
  • The young age of Shergottites, ranging from 175 to 475 million years old, suggests that Mars has experienced relatively recent volcanic activity, in contrast to the more ancient geological history of the Earth. This indicates that the Martian crust and mantle have remained active and dynamic, potentially supporting the possibility of past or present habitability on the planet. By studying the geochemical and mineralogical composition of Shergottites, researchers can gain insights into the thermal and igneous history of Mars, as well as the processes that have shaped the planet's surface and interior over time. These findings have important implications for our understanding of the overall geological evolution of Mars and its potential to support life.

Related terms

Martian Meteorites: Meteorites that have been identified as originating from the surface of Mars, providing a direct link to the geological processes and composition of the planet.

Nakhlites:

Another type of Martian meteorite, named after the Nakhla meteorite, that is distinct from Shergottites in its mineralogical and geochemical characteristics.

Chassignites:

A rare type of Martian meteorite that is believed to have originated from the Martian mantle, providing information about the deeper interior of the planet.