Which natural resources were primarily mined in New Mexico during the 20th century?

The primary natural resources mined in New Mexico during the 20th century were uranium and copper. This period was characterized by significant demand and production, particularly due to the nuclear age that emerged after World War II, which heightened the need for uranium for military and energy purposes. New Mexico became one of the leading producers of uranium in the United States, particularly noted for its rich deposits located in the Grants Mineral Belt.

Copper mining also played a crucial role in the state's economy, with significant reserves found in the area. The mining of copper supported not only local economies but also the broader industrial sector, as copper is essential in electrical applications and construction.

While gold and silver were historically important, their production did not match the scale of uranium and copper mining during the 20th century. Coal and limestone, although mined, were not the primary resources associated with New Mexico's industrial growth in this timeframe, nor did iron and phosphate extraction achieve the same prominence as uranium and copper.