Fullerene in olive oil after 3 weeks

What reactions are taking place in the olive oil, to turn it from the usual yellow-green (olive?) colour, to this?

Here is a collection of papers that deal with aspects of fullerene triglyceride interactions, that may,or may not, throw some light on the reactions in olive oil:

http://144.206.159.178/FT/145/87403/14117365.pdf

http://www.sciencedirect.com/science/article/pii/S0009308410000496