The literature on gold deposits has increased exponentially during the past eight years. The books on gold geology and exploration cover in most cases certain geographical areas (for example, Gold in Canada, etc. ), or they contain papers presented at symposia and congres ses. The approach often missing in other texts is the one which combines geology with mineral ogy and the recovery problems and which addresses the earth scientist as well as the ex tractive metallurgist. Dr. Claudia Gasparrini has managed to fill this gap very well. She builds a bridge from the ore geology aspect to the...

The idea for the present Spilite Volume was born during the Spilite Symposium at the XXIIIrd session of the International Geological Con gress in Prague, 1968. At that time, only a restricted number of petro logists working on spilites was present and, therefore, the group assem bled agreed that a Symposium Volume should also include recent papers by many other spilite specialists. At the same time it was agreed that the papers presented at the Symposium should be returned to the authors for changes and additions. This procedure of upgrading and amending the papers has continued until this...