Questions tagged [geochemistry]

The science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems.

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Why we compare the oxygen fugacity of magma ocean with IW, FMQ or any other buffer?

e.g., Nitrogen solubility as high as near 25 ppm in forsterite, pyroxene, and garnet have been reported in an experimental study in the 1.5–3.0 GPa range with the oxygen fugacity controlled at those ...
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MATLAB - How to plot multiple timeseries (paleoclimate) with a common x axis and multiple stacked y axes?

I'm trying to create figures in MatLab and am a reasonably new user, I'm wondering if there is a good way to make plots that use a common x-axis and then vertically stacked and alternating y-axes as ...
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What are the favourable conditions for the formation of porphyry copper deposits?

Favourable condition for the formation of porphyry copper deposits is : 1. Extremely low oxygen fugacity in initial magma 2. High water content in initial magma 3. Crystallization of magama at deep ...
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How is the difference in crust and mantle composition explained?

We know that the composition of the crust is SiAl and SiMa and the one of mantle is mostly ophiolites, but why? Which are the geological processes that make this difference exist?
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Can someone please help me figure out what this rock/mineral is? [closed]

Inside of the rock there is some type of fossil and it looks like a tiny tooth. Whatever this is, it's very interesting and doesn't make any markings when drawn with. It is white and yellow, almost ...
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How much coal does it take to generate oil?

I'm going to be doing a presentation for grade school children, and I'd like them to get a feel for how much source rock it takes to make oil. It takes about a 10 foot layer of swamp debris to make ...

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