Matches in SemOpenAlex for { <https://semopenalex.org/work/W3105120504> ?p ?o ?g. }
- W3105120504 endingPage "103017" @default.
- W3105120504 startingPage "103017" @default.
- W3105120504 abstract "The Cerro Negro district, northwestern Deseado Massif (Patagonia, Argentina), is one of two world-class Au–Ag epithermal mines in the Patagonian region, with combined reserves, resources, and production of about 8 Moz of Au equivalent. The epithermal deposits are hosted by volcanic and intrusive rocks and are related to the evolution of distinct Jurassic magmatic events. Major WNW trending depocenters were filled by a thick sequence of andesitic-dacitic flows and ignimbrites. In the western part of the district, the sequence is intruded by subvolcanic bodies of the same composition and is grouped into the 159-156 Ma Eureka Volcanic Subvolcanic Complex (EVSC). Hydrothermal activity took place during the last stages of the EVSC, producing epithermal Au- and Ag-rich veins of low to intermediate sulfidation style in the Eureka West (156 Ma) and the Marianas-San Marcos veins (155-154 Ma) that were emplaced in NW striking extensional faults and in WNW to E-W trending strike-slip faults. In the eastern part of the district, basal units of the EVSC are overlain by a thick package of 154 Ma rhyodacitic ignimbrites, hosting the NW to EW-striking Vein Zone deposit and the NW-striking Bajo Negro, Silica cap and Gato Salvaje veins. NNE-trending block faulting formed horsts in the western and eastern parts of the district, separated by a central graben. Uplift of the western and eastern horst blocks lowered the water table and caused erosion, exhumation, and telescoping of the vein systems. Volcanism culminated in a late-to post-mineral rhyolitic event composed of lava-domes and volcaniclastic deposits grouped into the Eureka Rhyolitic Complex (ERC). Continued hydrothermal-volcanic explosive activity produced breccias which cap some of the Au–Ag vein deposits. The high geothermal gradient during ERC volcanism generated renewed hydrothermal activity, and hot springs discharged along the boundary faults of the central graben and within the graben in a fluvio-lacustrine environment. The Au–Ag epithermal veins associated with the EVSC (Eureka and Marianas-San Marcos) show a complex paragenetic history. High Au–Ag grades are related to early sulfide-rich ginguro bands formed at 290–230 °C from meteoric and volcanic fluids due to boiling/flashing mechanism at ~600–800 m below the paleowater table. Low-grade to barren quartz stages followed the early Au–Ag stage, and late calcite was deposited due to the collapse of steam heated CO2 waters. The highest Au–Ag grades are related to a late supergene event extending to 400 m depth. The eastern group of epithermal deposits (Vein Zone, Bajo Negro, Silica cap and Gato Salvaje) were emplaced ~300–400 m below the paleowater table indicated by a silica cap on Cerro Negro hill. They are dominated by silica replacement after lattice calcite texture with high Au grades related to low temperature quartz and late hematite-stained brecciation. We conclude that all deposits are genetically related to intrusive activity, and that additional Au–Ag mineralization may be concealed beneath post-mineral volcanic and sedimentary rocks in the central graben." @default.
- W3105120504 created "2020-11-23" @default.
- W3105120504 creator A5022108315 @default.
- W3105120504 creator A5051356059 @default.
- W3105120504 creator A5054754120 @default.
- W3105120504 creator A5056693792 @default.
- W3105120504 creator A5060997383 @default.
- W3105120504 creator A5070660402 @default.
- W3105120504 creator A5089728816 @default.
- W3105120504 date "2021-01-01" @default.
- W3105120504 modified "2023-10-16" @default.
- W3105120504 title "The Cerro Negro epithermal district, northwestern Deseado Massif (Patagonia, Argentina): New insights from telescoped volcanic-hydrothermal systems" @default.
- W3105120504 cites W1451871409 @default.
- W3105120504 cites W1967223289 @default.
- W3105120504 cites W1968751025 @default.
- W3105120504 cites W1976028787 @default.
- W3105120504 cites W1977956966 @default.
- W3105120504 cites W1983843436 @default.
- W3105120504 cites W1984228301 @default.
- W3105120504 cites W1999448338 @default.
- W3105120504 cites W2011764103 @default.
- W3105120504 cites W2012687775 @default.
- W3105120504 cites W2013804710 @default.
- W3105120504 cites W2028917031 @default.
- W3105120504 cites W2039008795 @default.
- W3105120504 cites W2055875514 @default.
- W3105120504 cites W2068509334 @default.
- W3105120504 cites W2070781346 @default.
- W3105120504 cites W2073217218 @default.
- W3105120504 cites W2095803901 @default.
- W3105120504 cites W2096136395 @default.
- W3105120504 cites W2118969316 @default.
- W3105120504 cites W2168769600 @default.
- W3105120504 cites W2260604430 @default.
- W3105120504 cites W2751754085 @default.
- W3105120504 cites W2806528374 @default.
- W3105120504 cites W2944454366 @default.
- W3105120504 cites W2991055835 @default.
- W3105120504 cites W3023184384 @default.
- W3105120504 cites W3187820118 @default.
- W3105120504 doi "https://doi.org/10.1016/j.jsames.2020.103017" @default.
- W3105120504 hasPublicationYear "2021" @default.
- W3105120504 type Work @default.
- W3105120504 sameAs 3105120504 @default.
- W3105120504 citedByCount "2" @default.
- W3105120504 countsByYear W31051205042021 @default.
- W3105120504 countsByYear W31051205042022 @default.
- W3105120504 crossrefType "journal-article" @default.
- W3105120504 hasAuthorship W3105120504A5022108315 @default.
- W3105120504 hasAuthorship W3105120504A5051356059 @default.
- W3105120504 hasAuthorship W3105120504A5054754120 @default.
- W3105120504 hasAuthorship W3105120504A5056693792 @default.
- W3105120504 hasAuthorship W3105120504A5060997383 @default.
- W3105120504 hasAuthorship W3105120504A5070660402 @default.
- W3105120504 hasAuthorship W3105120504A5089728816 @default.
- W3105120504 hasConcept C119127063 @default.
- W3105120504 hasConcept C120806208 @default.
- W3105120504 hasConcept C127313418 @default.
- W3105120504 hasConcept C151730666 @default.
- W3105120504 hasConcept C160776313 @default.
- W3105120504 hasConcept C166839181 @default.
- W3105120504 hasConcept C17409809 @default.
- W3105120504 hasConcept C192241223 @default.
- W3105120504 hasConcept C25822816 @default.
- W3105120504 hasConcept C2776062231 @default.
- W3105120504 hasConcept C2776074449 @default.
- W3105120504 hasConcept C2776268066 @default.
- W3105120504 hasConcept C36986328 @default.
- W3105120504 hasConcept C49708893 @default.
- W3105120504 hasConcept C77928131 @default.
- W3105120504 hasConceptScore W3105120504C119127063 @default.
- W3105120504 hasConceptScore W3105120504C120806208 @default.
- W3105120504 hasConceptScore W3105120504C127313418 @default.
- W3105120504 hasConceptScore W3105120504C151730666 @default.
- W3105120504 hasConceptScore W3105120504C160776313 @default.
- W3105120504 hasConceptScore W3105120504C166839181 @default.
- W3105120504 hasConceptScore W3105120504C17409809 @default.
- W3105120504 hasConceptScore W3105120504C192241223 @default.
- W3105120504 hasConceptScore W3105120504C25822816 @default.
- W3105120504 hasConceptScore W3105120504C2776062231 @default.
- W3105120504 hasConceptScore W3105120504C2776074449 @default.
- W3105120504 hasConceptScore W3105120504C2776268066 @default.
- W3105120504 hasConceptScore W3105120504C36986328 @default.
- W3105120504 hasConceptScore W3105120504C49708893 @default.
- W3105120504 hasConceptScore W3105120504C77928131 @default.
- W3105120504 hasFunder F4320321594 @default.
- W3105120504 hasLocation W31051205041 @default.
- W3105120504 hasOpenAccess W3105120504 @default.
- W3105120504 hasPrimaryLocation W31051205041 @default.
- W3105120504 hasRelatedWork W1989994122 @default.
- W3105120504 hasRelatedWork W2037009641 @default.
- W3105120504 hasRelatedWork W2065284401 @default.
- W3105120504 hasRelatedWork W2077156029 @default.
- W3105120504 hasRelatedWork W2156068745 @default.
- W3105120504 hasRelatedWork W2263304742 @default.
- W3105120504 hasRelatedWork W2289415069 @default.
- W3105120504 hasRelatedWork W2504982242 @default.
- W3105120504 hasRelatedWork W3105120504 @default.