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Craters on Moon hide answers to how Earth formed

July 4, 2024
in Health
Craters on Moon hide answers to how Earth formed
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One of the key findings is that the lunar impact record began during the solidification of the lunar magma ocean, with clear impact structures being preserved from about 4.46 billion years ago.

Moon

The unexpectedly high content of highly siderophile elements in the lunar mantle suggests continued bombardment by chondritic meteorites. (Photo: Nasa)

India Today Science Desk

New Delhi,UPDATED: Jul 4, 2024 17:36 IST

Scientists have made significant strides in understanding the Moon’s impact history, shedding light on the early solar system’s evolution and the formation of terrestrial planets.

Recent research has revealed crucial insights into lunar crater chronology and impact flux, with implications for our understanding of Earth’s own geological past.

The study of lunar impact flux relies heavily on samples returned from various missions, including six manned and four robotic expeditions. These samples, consisting of basalts and volcanic glass from different geological units, have been instrumental in establishing radiometric ages and interpreting exposure ages of lunar surfaces.

One of the key findings is that the lunar impact record began during the solidification of the lunar magma ocean, with clear impact structures being preserved from about 4.46 billion years ago.

Moon

The unexpectedly high content of highly siderophile elements in the lunar mantle suggests continued bombardment by chondritic meteorites after the magma ocean’s differentiation, possibly due to a late veneer impact event.

Researchers have also identified a period of late heavy bombardment (LHB) around 3.8 billion years ago, which significantly affected the Moon’s geological and biochemical evolution.

This event is believed to have had profound implications for the terrestrial planets as well. The South Pole-Aitken basin, one of the largest impact structures on the Moon, is thought to have formed around 4.3 billion years ago, preceding the LHB.

Despite these advancements, several uncertainties remain. The relationship between radiometric ages and model ages predicted by crater chronology is not always consistent, particularly for geological units older than 3.92 billion years.

The origins of early lunar impact events and their orbital dynamics are still unclear. (Photo: AFP)

The origins of early lunar impact events and their orbital dynamics are still unclear, as is the precise source of the late veneer.

Recent missions, such as China’s Chang’e-5, have provided valuable data that support current lunar crater chronology models. However, researchers emphasise the need for further exploration, particularly of sites older than 3.92 billion years, to refine our understanding of lunar impact flux and early meteorite impact processes.

As various countries plan future lunar exploration missions, scientists anticipate that new samples and remote sensing data will help resolve outstanding questions about the Moon’s early impact history.

This research not only enhances our understanding of lunar evolution but also provides crucial insights into the formation and development of our own planet and the solar system as a whole.

Published By:

Sibu Kumar Tripathi

Published On:

Jul 4, 2024

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Copyright for syndicated content belongs to the linked Source : IndiaToday – https://www.indiatoday.in/science/story/craters-on-moon-hide-answers-to-how-earth-was-formed-2562380-2024-07-04?utm_source=rss

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