La Jara Mesa, a sandstone-hosted roll front style deposit is located in Grants Mineral Belt, New Mexico, the largest historical uranium district in the United States. The project is at the development stage and will be an underground operation. The project has a mineral resource estimate of 10.4 million pounds of uranium of measured and indicated (NI 43-101 compliant).
Cibola County, New Mexico in the Ambrosia Lake Mining District of the Grants Mineral Belt
Plan of Operations – completed and reviewed by USFS
Environmental Impact Statement – Final phase and public comment period
Permitting – Final permitting approval under way and waiting on Record of Decision
The La Jara Mesa uranium deposit is a roll front uranium deposit occurring within a sequence of classic Jurassic and Cretaceous sedimentary rocks. Tertiary basaltic lavas occur unconformably on top of the cretaceous sediments.
Uranium mineralization at La Jara occurs within 4 levels of the Poison Canyon sandstone member of the Morrison formation, however the only significant deposits are known within the lower two units. Within the district the Marquez Mine produced 656,000 tonnes grading 0.26 % U3O8. This deposit occurs 4 miles north of La Jara.
Uranium was discovered in the Grants district of New Mexico in the early 1950s. Since the discovery considerable historic uranium exploration activity has been completed on La Jara Mesa by companies such as United Nuclear Corporation, Gulf Resources and Homestake primarily in the 70’s and 80’s. These companies performed exploration work, comprising of over 700 drill holes as well as metallurgical test work. Historical metallurgical studies on La Jara Mesa exhibited strong recoveries and potential underground access is quite straightforward via an inclined ramp from the valley floor. These tests determined that the mineralization would readily leach with acid and recoveries averaging 90% were achieved.