The effort made to hold these two seminars simultaneously has been valuable, 90 lectures were presented and discussed on themes related to mine geology and mine planning.

We are particularly grateful to:

• The authors, for their invaluable technical contributions and willingness to share their knowledge and experiences
• The Technical Committee, for their collaboration to the revision of abstracts
• The Advisory Committee, for their contribution to promote the seminars
• The co-organizing institutions, Universidad Católica del Norte and Universidad Adolfo Ibáñez
• The sponsors, for their generous support
• Media partners, for their assistance in promoting the seminar and bringing updated information to the public in a timely manner

And last, but certainly not least, we would like to thank all participants for their contribution to the technical discussion of presented works, which contributed to the Fourth International Seminar on Geology for the Mining Industry and the Fourth International Seminar on Mine Planning success.

Executive Committee
GEOMIN-MINEPLANNING 2015