normally, that is an easy question to answer by conducting the minimalist amount of research and effort. but being you are new (lots of newbies lately, and for known reasons), i will provide some assistance with a very quick google search. here is what i found for you:
iridium - (chemical symbol Ir), it is the 77th element
ir - the internet country code top-level domain for Iran
injured reserve - a reserve list for professional teams to use if a player is injured and unable to play for an extended time
or
infrared (ir) - a portion of the electromagnetic radiation spectrum
being that USPR is an exploration company, your best choice would be iridium as it could possibly be found near gold, silver, or copper.