Saturday, May 21, 2022

Scientists pinpointed the likely home of martian meteorites

The study would help provide the context to unravel the geological history of Mars.

Almost 166 Martian meteorites have landed on Earth over the past 20 million years. Although, their origin on Mars remains unknown.

Scientists from Curtin University have pinpointed the likely origin of martian meteorites. They used a machine-learning algorithm that analyzes high-resolution planetary images. They found that meteorites that landed on Earth likely originated from Mars’ Tooting crater.

The Tooting crater is located in the Tharsis region, the largest volcanic province in the solar system.

Lead researcher Dr. Anthony Lagain, from Curtin University’s Space Science and Technology Centre in the School of Earth and Planetary Sciences, said, “the new findings would help provide the context to unravel the geological history of the Red Planet.”

“In this study, we compiled a new database of 90 million impact craters using a machine learning algorithm that allowed us to determine the potential launch positions of Martian meteorites.” 

“By observing the secondary crater fields — or the small craters formed by the ejecta that was thrown out of the larger crater formed recently on the planet, we found that the Tooting crater is the most likely source of these meteorites ejected from Mars 1.1 million years ago.”

“For the first time, through this research, the geological context of a group of Martian meteorites is accessible, ten years before NASA’s Mars Sample Return mission is set to send back samples collected by the Perseverance rover currently exploring the Jezero crater.”

Co-Lead Professor Gretchen Benedix, also from Curtin University’s Space Science and Technology Centre, said, “The algorithm that made this possible was a major step forward in how scientists can use the terabytes of planetary data available.”

“We would not have been able to recognize the youngest craters on Mars without counting the tens of millions of craters smaller than one kilometer across.”

“This finding implies that volcanic eruptions occurred in this region 300 million years ago, which is very recent at a geological time scale. It also provides new insights on the structure of the planet beneath this volcanic province.”

Scientists used the fastest supercomputer in the Southern Hemisphere, the Pawsey Supercomputing Centre, and the Curtin HIVE (Hub for Immersive Visualisation and eResearch) to analyze a very large volume of high-resolution planetary images through a machine-learning algorithm to detect impact craters.

Dr. Lagain said“The research would help create a better understanding of the formation and evolution of Mars and Earth, potentially offering benefits for other industry sectors on our planet.”

“Mapping craters on Mars is the first step. The algorithm we developed can be retrained to perform automated digital mapping of any celestial body. It can be applied to Earth to assist with managing agriculture, the environment and even potentially natural disasters such as fires or floods.”

Journal Reference:

  1. Again, A., Benedix, G.K., Servis, K. et al. The Tharsis mantle source of depleted shergottites revealed by 90 million impact craters. Nat Commun, 2021 DOI: 10.1038/s41467-021-26648-3

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