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| Suvorova (left) and Dr Janet (right). (uwa.edu.au) |
End of the month rock minerals found on earth. It is said that, after the return of American astronauts from the moon, it was concluded that the moon has a mineral rock that exists only in the month. Minerals are Tranquillityite, and these minerals have been discovered in Western Australia.
As already known, suspected that the USA has managed to land a spacecraft on the moon. The spacecraft was boarded by three men named Neil Armstrong, Edwin 'Buzz' Aldrin and Michael Collins. The spacecraft is known as the Apollo 11 and landed on the moon in 1969 ago. They brought the moon rock samples. These rocks contain minerals armalcolite, pyroxferroite and tranquillityite. At that time, scientists believed that the mineral is only found in the moon.
Armalcolite and pyroxferroite were later found on Earth, but when the CMCA's Dr Janet Muhling and Assistant Professor Alexandra Suvorova and their colleagues from Curtin University, published a recent paper in the journal Geology, they showed for the first time that tranquillityite occurred also on Earth.
To confirm the identity of the Pilbara mineral, Dr Muhling analysed its composition by collecting X-rays emitted when the sample was targeted by an electron beam in the electron microscope. This showed that the terrestrial mineral was made up of the same elements as lunar tranquillityite. Electron diffraction showed that the two minerals have the same crystal structure.
Previously, tranquillityite was thought to exist only in returned moon samples and lunar - and possibly Martian - meteorites.
The researchers believe tranquilliltyite is the final ‘lunar' mineral to be found on Earth because it is rare, small and prone to change. The Moon lacks water and its minerals are pristine, but even a small amount of water in terrestrial magmas will cause minerals to be altered and difficult to identify.
Tranquillityite, both lunar and terrestrial, is an ideal mineral for determining the age of the enclosing rock by radiometric dating. The Pilbara rocks in which tranquillityite occurs were once thought to have been about 820 million years old but new dating by Professor Rasmussen and colleagues at the John de Laeter Centre for Isotope Research has shown that they are about 1040 million years old.
*The so-called sea is actually a giant impact crater that appears dark because it is filled with dark basaltic rocks. It was first named by Italian astronomer Giambattista Riccioli in 1651.
The next question is, did people ever been to the moon? Or is it possible minerals on the moon rocks also exist on earth? Only maturity in the knowledge that can solve the mystery of the moon.
Source: http://www.news.uwa.edu.au/201201164276/international/moon-walk-mineral-discovered-western-australia
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