Carlin–type gold deposit

These deposits are characterized by invisible (typically microscopic and/or dissolved) gold in arsenic rich pyrite and arsenopyrite.

The Carlin type deposits show enrichment in the elements gold, arsenic, antimony, mercury, thallium and barium.

[5] During the Eocene, fluids flowed through the lower plate of thrust faults and the underlying fractured carbonates.

A low Ph in the fluids allowed for a significant amount of carbonate rocks to dissolve.

Later, when the Basin and Range began its extension, normal faulting took place, and the ore deposits were downfaulted and buried under alluvial sediment.

Sedimentary-rock hosted gold deposits in Nevada. All of the deposits shown that are north and east of the Battle Mountain-Eureka trend (and many of the others) are Carlin-type gold deposits . Source: USGS
Goldstrike (Post–Betze) Mine , Carlin Trend , Nevada, the largest Carlin-type deposit in the world, containing more than 35,000,000 ounces of gold. [ 1 ]
Carlin-type gold ore from the Twin Creeks mine, Nevada, near the Getchell Mine . This is an auriferous, silicified-decalcified siltstone/mudstone from the Comus Formation (Lower Ordovician). Ore grade is about 0.20 to 0.25 ounces of gold per ton of rock. The gold mineralization is very finely disseminated: "invisible gold".