We have just dome some analysis of the Australian mining industry. The first link shows how suppliers are clustered according to the services that they provide. The second is a complementary map showing how services are clustered according to the number of common suppliers.
Service Providers:
http://www.optimice.com.au/mining_services.php
Services Portfolio:
www.optimice.com.au/mining_services_portfolio.php
Service Providers:
http://www.optimice.com.au/mining_services.php
Services Portfolio:
www.optimice.com.au/mining_services_portfolio.php