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New Paper on the Early Evolution of the Lunar Crust Published in Nature Geoscience!

3/30/2020

 
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The Moon's nearside and farside are asymmetric in a number of ways, including crustal thickness, the abundance of erupted lavas, and in the geochemistry of the the crust itself. There is a large concentration of radioactive and geochemically-incompatible elements on the nearside. In our new paper, we showed that this enrichment in incompatible elements lowers the melting temperature of the mantle under the nearside dramatically, and likely resulted in between 4 and 13 times more magma production on the nearside early in the Moon's history, at around 4.3 billion years ago. You can check out the paper here and also UF's press release about our paper here.

EPSL Paper on Iron Isotope Fractionation Published!

3/4/2019

 
My new paper in Earth and Planetary Science Letters is out and available online. This paper on how iron isotopes fractionate during core formation follows up my first paper on the topic in Nature Geoscience by provided some additional experiments and also offer a model for why we see the isotopic behavior that we observe. In the paper, my co-authors and I propose that the shortening and stiffening of Fe bonds in Fe-rich core-like alloys causes an increase in the alloys preference for heavy Fe isotopes relative to molten silicate during core formation, which is what we observe in our experiments. We also model the fractionation behavior of Fe isotopes during planetary differentiation and conclude we do not see a clear signature of isotope fractionation by vaporization or volatile depletion.

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