Sediment-Hosted Lead-Zinc Deposits in Earth History

Hydrothermal Dolomites in the Early Albian (Cretaceous) Platform Carbonates (NW Spain): Nature and Origin of Dolomites and Dolomitising Fluids

“…wt% NaCl; Shah et al, 2010). This piece of information together with the observed presence of sulphate phases (Bustillo et al, 1992) (Leach et al, 2005). However some depleted values can also be possibly explained by contamination with calcite (TC) in the analysed samples ( Fig.…”

Zn-Pb Ores of Mississippi Valley Type in the Lycksele-Storuman District, Northern Sweden: A Possible Rift-Related Cambrian Mineralisation Event

“…Sediment-hosted Pb-Zn deposits include a large group of ore mineralisation styles and genetic variants hosted by siliciclastic and carbonate rocks with no associated igneous activity [54]. The majority of the deposits occur in rift-related fault zones, commonly on the flanks of basins or in foreland thrust belts.…”

“…The majority of the deposits occur in rift-related fault zones, commonly on the flanks of basins or in foreland thrust belts. Leach et al [55] classified the sediment-hosted Pb-Zn deposits into three principal types: (i) synsedimentary to early diagenetic exhalative SEDEX type; (ii) epigenetic deposits hosted in platform carbonate sequences also referred to as the Mississippi Valley type (MVT); (iii) sandstone-hosted type. However, a continuum of subtypes exists between these types.…”

“…However, a continuum of subtypes exists between these types. For instance the MVT deposits encompass a wide range of ore styles (subtypes like Irish-and vein-type MVT) depending on the geological features (lithology and structures) that control fluid migration and sulphide-forming processes [54]. The deposits formed by similar depositional processes from migrating dense basinal metalliferous brines and with the Pb derived from a crustal source [56].…”

Mesozoic Iron Oxide Copper-Gold Mineralization in the Central Andes and the Gondwana Supercontinent Breakup

“…With improved geochronological methods and better plate tectonic reconstructions (e.g., Condie, 2005), the temporal distribution of mineral deposits associated with supercontinent assembly and breakup have been documented for many important ore types, such as orogenic gold deposits (Goldfarb et al, 2001), volcanic-hosted massive sulfide deposits , and sediment-hosted lead-zinc deposits (Leach et al, 2010). Most Precambrian IOCG deposits are believed to have been distributed in intracratonic settings, typically 100 to 200 km inland from cratonic margins, and appear to form during episodes of supercontinent breakup (Groves et al, 2010).…”