Chert Cliff Deposit, Antelope Mining District, Eureka County, Nevada, USAi
| Regional Level Types | |
|---|---|
| Chert Cliff Deposit | Deposit |
| Antelope Mining District | Mining District |
| Eureka County | County |
| Nevada | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 53' 46'' North , 116° 17' 35'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Eureka | 610 (2011) | 51.3km |
Structure: fault Roberts Mountains thrust fault
Alteration: Host rock is pervasively silicified to jasperoid.
Commodity: Ore Materials: gold Gangue Materials: jasperoid
Deposit: Geology of the claims area consists of dolomitic siltstones of the Mississippian Webb formation overling massive Devils Gate Limestone in thrust fault contact. Disseminated gold occurs in hydrothermally altered Webb siltstones and jasperoid. The mineralization is stratabound in the Webb formation, but concentrated adjacent to a feeder fault.
Deposit type: Sediment-hosted Au
Development: Gold was discovered at Chert Cliff in the mid 1960s during the initial wave of prospecting for carbonate-hosted gold deposits following recognition of the Carlin model in 1961. The most intensive work was carried out by ASARCO in the 1980s which succeeded in outlining the Chert Cliff gold deposit as presently known. The ASARCO drill program delineated a gold deposit at Chert Cliff containing approximately 1.4 million tons grading 0.04 ounces gold per ton (56,000 ounces). ASARCO held the property until at least 1996. The Chert Cliff deposit remains open to the west and ASARCO geologists believed it could be expanded significantly by adding additional drilling in that area. Anomalous to ore grade intercepts were also encountered in isolated drill holes north and east of the resource area but were never followed up. In 2006, the Chert Cliff Property is 100% owned by Columbus Gold Corporation and has been leased to privately held Platte River Gold Inc. To maintain the lease, Platte River is obligated to make escalating annual lease payments to Columbus totaling US$142,000 over the term of the lease and must pay Columbus US$100,000 in Platte River common shares. Platte River is also responsible for all maintenance payments and is required to make exploration expenditures totaling US$275,000. Columbus is entitled to net smelter return royalties on production of between 2% and 3%.
Ore(s): Ore mineralization is bedding-controlled but adjacent to a fault.
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1 valid mineral.
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| Link to USGS MRDS: | 10310561 |
|---|
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