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Irene Antonenko
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Irene Antonenko

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I love it when science makes great art!
A new global map of water surface temperatures is so visually stunning that it easily may be mistaken for art.
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That's it. The last talk has been given. The last drink at the bar has been drunk. And the last goodbyes with old friends have been said. Farewell #LPSC2015. You were a great conference for me.
Till next year....
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Irene Antonenko

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Dr. P. Boehnke pointed out that only about 50% of all lunar impact samples were heated to temperatures hot enough to reset their Ar/Ar ratios during the impact that formed them. Thus, about 50% of Ar/Ar dates from these samples will show ages that are older than the impact event. This needs to be considered. #lpsc2015  
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Dr. Pete Schultz gave an amazing talk about the impact that formed South Pole-Aitken (SPA) basin. First he showed spectacular high speed movies of experimental impacts into glass spheres, which demonstrate the disruption and damage that occurs at the antipode of the impact site. These also showed that the antipode of the impact site is not the same as the antipode of the crater for oblique impacts. Next, Dr. Spudis evaluated geological features of SPA , showing that SPA is an oblique impact and that the antipode of the impact site (but not the crater) coincides with the centre of a system of tectonic features related to Procellarum. He thus concludes that the SPA impact would have disrupted the crust under Procellarum, allowing significant melts to form and migrate into the crust. These melts would have differentiated, forming a KREEP layer that was later exposed by the Imbrium impact event. Wow!! #lpsc2015  
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Interesting point about the antipode of the impact changing if the impact is oblique....
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A big thank you to Scott at the JMARS booth, who took time during Thursday's poster session to try and solve my JMARS issues.
#lpsc2015  
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Dr. Aileen Yingst used the MAHLI camera on the Mars Curiosity rover to show that fine grained deposits in Gale crater were formed by settling from suspension. The suspension medium is most likely water, because there are no aeolian features present.
     Dr. Yingst and I talk about this some more later and further concluded that the larger grains that can be seen interspersed among the fine grains could not have been carried by wind processes, again supporting the hypothesis that these materials were deposition by settling in water.
#lpsc2015  
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Irene Antonenko

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My microblogs from #LPSC2015 compiled all in one place and with links to pertinent LPSC abstracts.
Science talk at LPSC 2015. I was in the room, but I don't think I'm in this picture. Image credit:  Lunar and Planetary Institute.  This year's Lunar and Planetary Science Conference (LPSC) was fabulous. I went as an indepe...
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Irene Antonenko

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Zack Morse is doing some great work mapping the ejecta of Orientale basin on the Moon. This impact has been mapped before, but the last extensive work on this was in 1977. Zack is re-visiting these deposits using more recent data sets like the LROC WAC and NAC images. #lpsc2015  
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One of the themes for the Moon at LPSC this year has been the composition of the lunar mantle. Considering the variety of studies and findings, it is clear that we really don't know what the lunar mantle is made of.  #lpsc2015  
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Dr. H. Nekvasil conducted experiments that show how crystallization of plagioclase under high pressures can make the plagioclase more anorthitic with cooling. At low pressures, cooling plagioclase becomes more albite-rich, making it difficult to explain the high anorthite content of the lunar highlands crust. Dr. Nekbasil's work suggests the highland plagioclases could have cooled under higher pressures at depth in the lunar mantle and then been transported to the surface.
#lpsc2015  
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Dr. Rebecca Ghent looked at radar data of the lunar regolith and found that rocks on the surface break down and disappear within about 1 billion years. Rocks within the regolith, on the other hand, persist for long periods of time, well beyond their brethren on the surface.
#lpsc2015  
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Dr. S. Lawrence pointed out that GRAIL lunar gravity data does not support the presence of a basin in the Australe region of the Moon.
#lpsc2015  
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Have them in circles
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