Mexus Gold US (MXSG)

[Aqua-FX]

The time it takes to bring a deposit into production is also increasing significantly, slowing the rate at which production is replaced. Between 1985 and 1995, 27 mines with confirmed discovery dates began production an average of eight years from the time of discovery. The time from discovery to production increased to 11 years for 57 new mines between 1996 and 2005, and to 18 years for 111 new mines between 2006 and 2013. (For this analysis, expansions and mine redevelopments are not included as they are not comparable with new mine developments.)

The length of time from discovery to production is expected to continue trending higher: 63 projects now in the pipeline and scheduled to begin production between 2014 and 2019 are expected to take a weighted-average 19.5 years from the date of discovery to first production.

http://www.mining.com/web/fewer-discoveries-slower-development-weigh-on-gold-industry/

Looks like they still have 10 years before anyone needs to worry.