Key attributes the logo must convey :
Stability: The company is stable, mature, strong and professional
Conservative: Because of the commodity being explored/mined (uranium), we want to convey the idea that this is a conservatively managed and relatively lower risk company.
Simple/Clean: Not busy or cluttered
Not obvious: No images/imagery of rock hammers, old grizzled prospectors, head frames (mines) in the logo.
Uranium: Given the confusion that "energy" (in Brighton Energy) = oil/gas, there should be something in the logo that conveys "uranium" without saying the word. However, the uranium graphic is often used for uranium mining companies (i.e., http://www.firsturanium.com), so ideally the "uranium" concept should be slightly different, with some sort of twist.
Colors: Simple, easy to reproduce (common) color palette that works consistently in print, web, presentations. Hues of the green/orange colors of Niger flag would be interesting.
International: There can be no images that make it seem/feel "African" -- i.e., no images or outlines of Africa, or African wildlife, African masks, etc.
Future - Extensible: Once the company develops a mine (in a few years perhaps), the logo needs to be able to accomodate the addition of a sub-name for signage related to the mine. For example, it might be Brighton Energy - Red Lake, Brighton Energy - Bongobongo