“The big question is, why would we have some melt present in the Moon at that depth,” Mallik said. "Now we have the two anchor points—the core-mantle boundary and the surface temperature measured by Apollo—and that will help us create a temperature profile through the Moon. LRO spent its first three years in a low polar orbit collecting detailed information about the Moon and its environment. Temperature distribution in the Moon's mantle is well fitted by an exponential dependence. To begin to answer this question, Mallik conducted a series of experiments in 2016 at the Bavarian Research Institute of Experimental Geochemistry and Geophysics in Germany using a multi-anvil device that can exert the high pressures found deep inside the Moon. Copyright © 2020 United Press International, Inc. All Rights Reserved. All Rights Reserved. The Diviner instrument on NASA's Lunar Reconnaissance Orbiter measured temperatures of minus 396 F (minus 238 C) in craters at the southern pole and minus 413 F (minus 247 C) in a crater at the northern pole. The content is provided for information purposes only. The moon has an iron-rich core with a radius of about 205 miles (330 km). Why Do Colorful Cloud Bands Encircle Jupiter? Diviner data sets are produced by the Diviner Science Team at the University of California, Los Angeles. This document is subject to copyright. The temperature in the core is probably about 2,420 to 2,600 F (1,327 to 1,427 C). The map shows the locations of several intensely cold impact craters that are potential cold traps for water ice as well as a range of other icy compounds commonly observed in comets. Publication: Ananya Mallik, et al., “A petrologic study on the effect of mantle overturn: Implications for evolution of the lunar interior,” Geochimica et Cosmochimica, 2019; doi:10.1016/j.gca.2019.02.014. ", The moon's mantle-core boundary temperature is between 1,300 and 1,470 degrees Celsius. "It's not as hot [as Earth's interior] because the moon is smaller — hence its internal pressure is also smaller," NASA planetary scientist Renee Webber said during an online chat hosted by NASA. "What does this tell us about our own planet when the Moon doesn't experience this process? Because the evolution of the moon and Earth are linked, Mallik claims new insights into the history of the moon's geological evolution could help planetary scientists better understand Earth's past. "Any similarity in the composition between Earth and the Moon can give us insight into how these two planetary bodies were formed, what were the energetics of the collision, and how elements were partitioned between them. "The big question is, why would we have some melt present in the Moon at that depth," Mallik said. Mallik's research was published April 1 in the journal Geochimica et Cosmochimica. Receive mail from us on behalf of our trusted partners or sponsors? Diviner measured the moon by satellite born radiometer and surface mean temperatures were calculated for various areas. New York, Now that the temperature range at the boundary has been narrowed, scientists can begin to develop a more precise temperature profile of the Moon and proceed to determine a profile of the minerals that make up the mantle from its crust to its core. Some Like It Hot: Global Warming Triggered the Evolution of Giant Dinosaurs, Growth Rings From Fossil Bones Reveals T. rex Had Huge Growth Spurts, but Other Dinosaurs Grew “Slow and Steady”, Elusive Internal Structure of Mars Revealed by Ancient Zircon Minerals From the Red Planet, AI Machine Learning Innovation to Develop Chemical Library for Drug Discovery. She found the temperature to be between 1,300 and 1,470 degrees Celsius, which is at the high end of an 800 degree range that previous scientists had determined. LRO Diviner Lunar Radiometer Experiment surface temperature map of the south polar region of the Moon. Mallik also used a graphite heater to raise the temperature of the material until it began to partially melt. As our nearest neighbor, the Moon is a natural laboratory for investigating fundamental questions about the origin and evolution of the Earth and the solar system. or, by University of Rhode Island. The surface temperature of the Moon is approximately -20 C. According to Mallik, the Moon has an iron core, like that of Earth, and previous research using seismic data had found that between 5 and 30 percent of the material at the boundary of the core and mantle was in a liquid or molten state. SciTechDaily: Home of the best science and technology news since 1998. Because it is smaller than the Earth, the moon's interior temperatures don't climb as high. The next steps in Mallik’s research will involve experimentally determining the density of the molten material at the core-mantle boundary, which will further refine the temperature range.
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