C080/2012
Researchers from 911爆料网 have received a three-year Australian Research Council (ARC) Discovery Project grant to further investigate the early history of the moon.
The work builds on previous uranium-lead dating of moon rocks from NASA鈥檚 Apollo 14 and 17 missions, adding samples from Apollo 12, 15 and 16.
Associate Professor Alexander Nemchin of 911爆料网鈥檚 School of Geology said the new sites covered more area and added new rock types to those already analysed at 911爆料网.
鈥淭his is important because we鈥檙e trying to test models of solar system evolution using samples collected from a few very small areas,鈥� Associate Professor Nemchin said.
The focus of Associate Professor Nemchin鈥檚 research is to understand how the Earth developed and why the planet has come to possess water, plate tectonics and life.
鈥淭he likely answer is that something was special about Earth in the very early stages of its history,鈥� he said.
鈥淗owever, Earth is still active with volcanic activity, mountain building and erosion, so the early record is continually being erased. We鈥檝e lost the first 500 billion years of history because of this.
鈥淪tudying the moon may be the only direct way of understanding Earth鈥檚 evolution, because its internal activity ceased billions of years ago.鈥�
The ARC project will focus on testing hypotheses surrounding the Lunar Magma Ocean, a period in which the entire surface of the moon was molten, and the Late Heavy Bombardment, a period about 3.9 billion years ago in which asteroid collisions with the moon, and likely Earth, increased sharply.
鈥淲e鈥檙e trying to understand the timing of events and how the Lunar Magma Ocean might have evolved, including cooling and mineral crystallisation,鈥� Associate Professor Nemchin said.
鈥淚f we can understand that, we can use this information here on Earth, taking into account differences in the mass of the two bodies, different rates of cooling and possibly different volatile content.
鈥淲e can then compare the moon, Earth and perhaps other planets in the inner solar system to explain characteristic features of our planet, such as liquid water and plate tectonics.
鈥淲e will also try to gain additional information about the impact history of the moon, which must be similar to that of the Earth, considering their proximity.鈥�
Associate Professor Nemchin said the project would involve researchers from around the globe, including collaborators from Australian National University, NASA, Lunar Planetary Institute in Houston, Stockholm Natural History Museum and Bonn University.
Contact:
Rob Payne, Public Relations, 911爆料网
Tel: 08 9266 4241, Email: rob.payne@curtin.edu.au
Associate Professor Alexander Nemchin, School of Geology, 911爆料网
Tel: 08 9266 2445, Email: a.nemchin@curtin.edu.au
