The discovery of Cannington Mine, one of the largest silver and lead mines in the world, is a significant event in mining history attributed to extensive geological surveys. The mine is located in Queensland, Australia, and its discovery can be traced back to the late 1970s when geologists were conducting regional geological mapping and exploration activities.

Geological surveys in the area involved systematic field studies, including rock sampling and geophysical surveys, which revealed anomalies indicative of mineralization. The initial focus was on the potential for base metals, but the surveys uncovered a unique geological formation that contained high-grade silver and lead deposits. The combination of geological mapping and geochemical sampling provided critical data that led to the identification of the Cannington ore body.

In 1990, after further exploration and drilling, the site was confirmed as a viable mining operation, and Cannington Mine officially commenced production in 1997. The success of the mine can be attributed to the accurate interpretation of geological data and the application of advanced exploration techniques that led to the discovery of its rich mineral resources.

For more detailed information on the geological surveys and the discovery process, you can refer to geological publications and mining company reports related to the Cannington Mine.