[Achshar]

maybe its because Google is not sure what 'Polaris mine' really is.. since there are a number of results on that page referring to Polaris mine as completely different things, Myspace, band site, services site, services review/info site and the obvious Wikipedia page and a gov site. PS Google usually tried to identify individual search terms and give then a 'presence' on internet. eg on searching 'X food shop yelp' google knows yelp is a reviewing site ('presence') and hence user is looking for reviews/info.