Studying drill core at Jinchuan.  The tour group was shown drill core from the contact of the marble country rock through mineralised websterite to the high grade core of the deposit hosted by lherzolite-peridotite, passing outwards to low grade ore in websterite to the outer mineralised websterite zone again.   Our guides Yin Maohing and Fan Fuhua are crouching discussing core in the foreground on the left image.
Photographs by Mike Porter