Having successfully run and cemented casing in the 12¼” section of EG-1, we’re now into the final 8 ½” open hole section. The bits are grinding the granite to powder – as this cuttings sample from 4050m shows. Current depth is 4324m MD and we expect to intersect Great Crosscourse fault soon.
The Eden Project sits on the site of the former Bodelva pit. The Great Crosscourse was mined here for hundreds of years for minerals such as kaolinite (clay) and cassiterite, used mainly in the paper industry.
You can find more detail about the mineralisation of the Great Crosscourse in this paper: http://ussher.org.uk/wp-content/uploads/journal/1999/07-Mueller_et_al_1999.pdf