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Michael Anenburg Profile picture
Michael Anenburg
@manenbu
I make fake rocks & minerals at high pressures & temperatures. Admirer of carbonatites, rare earths, and geological miscellanies. At @anuearthscience. מיכאל.🐪
Oct 10, 2020 • 22 tweets • 8 min read
New paper explaining why and how carbonatites host REE mineralisation is now out in @ScienceAdvances and it's #openaccess!
doi.org/10.1126/sciadv…

#rareearths #geology

Thread: One of the issues with REE in carbonatites is that although carbonatites are obviously high temperature igneous, the mineralisation itself always seems to be low temperature (400 °C and lower).
Jul 27, 2020 • 15 tweets • 4 min read
Let's do a bit of armchair geology, ok?
I was on Google Earth looking for something, and then I saw this dark green line in the desert. I wonder what it is? A closer look. Looks green, right? Surprising for something in the middle of the desert.
Dec 18, 2019 • 21 tweets • 4 min read
We just had a short paper out on the topic, so let's talk oxygen fugacity (ƒO₂), ok?
Thread.
doi.org/10.1093/petrol… ƒO₂ is one of the most confusing concepts in petrology, and it's understandable. It is not real. It does not exist. I has zero physical meaning (most of the times). It's easier to say what it isn't instead of what it is. Let's start with some examples.