The Role of Evaporite Basins in Producing Stratiform Mineralization

Bogashova, L. G.

doi:10.1080/00206818709466165

Cited by 2 publications

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“…This orebody is distinguished from the Main orebody by much higher Pb and BaSO 4 grades at a similar Zn grade. At the same time, it should be admitted that ore mineralization in ERSs and the localization of the Main orebody at the flank of the tectonic suture are particular and the most favorable local manifestations of a typical ore-controlling combination of fault and ore-bearing stratigraphic unit common to the Kuzha ore field and some other districts with stratiform base-metal mineralization (Heyl, 1968;Bogashova, 1987). The crosscutting faults with open cavities (relaxation fissures surrounding ERSs pertain to exactly this type of faults) made mixing of water from different levels possible, and this, in turn, led to the leaching of heavy metals from sedimentary rocks and clastic grains by chloride solutions and the subsequent precipitation of Fe, Pb, and Zn on hydrogen sulfide barriers.…”

Section: Base-metal Ore Mineralizationmentioning

confidence: 99%

The Kuzha barite-base-metal deposit

Filippov¹

2008

Geol. Ore Deposits

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The Kuzha barite-base-metal deposit is located on the western slope of the southern Urals and is hosted in strongly deformed Riphean rocks. The Main barite zone is related to a tectonic suture accompanied by alkaline and basic dikes. The stratiform base-metal ore mineralization is confined to a dolomite layer conjugated with the suture zone. The ore mineralization was formed as a result of interaction between heated mineralized water ascending along the suture zone and descending sulfate-bearing vadose water. Biogenic sulfate reduction played the main role in sulfide precipitation. The heating of the ore-forming medium up to 120 ° C terminated sulfate reduction and facilitated deposition of barite. The Kuzha deposit has much in common with other base-metal and barite-base-metal deposits in Russia, Kazakhstan, and the United States.

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Section: Base-metal Ore Mineralizationmentioning

confidence: 99%