The findings were recently published in the Nature journal ‘Communications: Earth and Environment’. The study, ‘Primitive lunar mantle materials at the Chandrayaan-3 landing site’, is authored by Rishitosh Sinha, Neha Panwar, Neeraj Srivastava, Dwijesh Ray, and Anil Bhardwaj, among others.
Anil Bhardwaj, director of PRL and a co-author of this study, said that this new finding makes the Chandrayaan-3 landing site a promising location to access primitive mantle samples, which are otherwise lacking in the existing lunar collections.
The concentrations of volatile elements were measured at the Shiv Shakti Point in the South Pole region of the Moon using the Alpha Particle X-ray Spectrometer (APXS) onboard the Pragyan Rover of the mission.
The readings from the volatile elements from the Shiv Shakti Point in the South Pole region were analysed by a PRL team. The results at the site showed a very different composition of elements such as sulphur, sodium, and potassium compared to the results of earlier missions such as Apollo, Luna, and Chang’e. The major result included relatively high sulphur content and relatively low sodium and potassium levels, primarily due to the location of the lander.
Researchers said that the location of Chandrayaan 3’s landing in 2023 was close to the SPA basin, whereas the majority of the other missions landed near the Procellarum KREEP Terrane (PKT), an area rich in potassium and other incompatible elements, providing a limited view of the Moon’s composition.
Most importantly, the findings support the idea that the Chandrayaan 3 site holds some of the oldest and most primitive materials from the Moon’s deep interior. The researchers at PRL said that the data not only reinforces the lunar magma ocean hypothesis but also opens new opportunities for studying ancient mantle materials.
‘A comparison of the APXS measured abundances with the other available data revealed anomalous depletion in sodium and potassium, but enrichment in sulphur in the soils at the highland landing site. This study has revealed the potential presence of primitive lunar mantle materials at the landing site, which was excavated during the formation of the South Pole-Aitken (SPA) basin 4.3 Ga (4.3 billion years) ago and redistributed by subsequent impacts on the SPA basin ejecta,’ read a release by ISRO on the groundbreaking discovery.
The primitive mantle contributed to the excess sulphur, which mixed with the materials at the landing site, said Rishitosh Sinha, the lead author of this study.
The low levels of sodium and potassium at the landing site suggest that the KREEP (potassium, rare earth elements, and phosphorus) might not have existed at the place and time of SPA basin formation, said Neha Panwar, a co-author of this study.
Neeraj Srivastava, a co-author of this study, said that the primitive mantle samples are crucial for studying the early evolution of the Moon.
Ahmedabad: In a major breakthrough in understanding the formation and composition of the Moon, scientists at the Physical Research Laboratory (PRL) in Ahmedabad analysed volatiles from an area around the South Polar region. This region is believed to host lunar primitive mantle materials ejected from a basin about 4.3 billion years ago. It is the first time a space agency analysed samples this old in this region of the Moon, reports Parth Shastri.
The findings were recently published in the Nature journal ‘Communications: Earth and Environment’. The study, ‘Primitive lunar mantle materials at the Chandrayaan-3 landing site’, is authored by Rishitosh Sinha, Neha Panwar, Neeraj Srivastava, Dwijesh Ray, and Anil Bhardwaj, among others.
Anil Bhardwaj, director of PRL and a co-author of this study, said that this new finding makes the Chandrayaan-3 landing site a promising location to access primitive mantle samples, which are otherwise lacking in the existing lunar collections.
The concentrations of volatile elements were measured at the Shiv Shakti Point in the South Pole region of the Moon using the Alpha Particle X-ray Spectrometer (APXS) onboard the Pragyan Rover of the mission.
The readings from the volatile elements from the Shiv Shakti Point in the South Pole region were analysed by a PRL team. The results at the site showed a very different composition of elements such as sulphur, sodium, and potassium compared to the results of earlier missions such as Apollo, Luna, and Chang’e. The major result included relatively high sulphur content and relatively low sodium and potassium levels, primarily due to the location of the lander.
Researchers said that the location of Chandrayaan 3’s landing in 2023 was close to the SPA basin, whereas the majority of the other missions landed near the Procellarum KREEP Terrane (PKT), an area rich in potassium and other incompatible elements, providing a limited view of the Moon’s composition.
Most importantly, the findings support the idea that the Chandrayaan 3 site holds some of the oldest and most primitive materials from the Moon’s deep interior. The researchers at PRL said that the data not only reinforces the lunar magma ocean hypothesis but also opens new opportunities for studying ancient mantle materials.
‘A comparison of the APXS measured abundances with the other available data revealed anomalous depletion in sodium and potassium, but enrichment in sulphur in the soils at the highland landing site. This study has revealed the potential presence of primitive lunar mantle materials at the landing site, which was excavated during the formation of the South Pole-Aitken (SPA) basin 4.3 Ga (4.3 billion years) ago and redistributed by subsequent impacts on the SPA basin ejecta,’ read a release by ISRO on the groundbreaking discovery.
The primitive mantle contributed to the excess sulphur, which mixed with the materials at the landing site, said Rishitosh Sinha, the lead author of this study.
The low levels of sodium and potassium at the landing site suggest that the KREEP (potassium, rare earth elements, and phosphorus) might not have existed at the place and time of SPA basin formation, said Neha Panwar, a co-author of this study.
Neeraj Srivastava, a co-author of this study, said that the primitive mantle samples are crucial for studying the early evolution of the Moon.