Results 91 to 100 of about 1,650 (170)

Is there gold mineralization associated with the Carrick thrust? [PDF]

open access: yes, 2013
Camm, G.S.   +3 more
core  

High-angle reverse faults, fluid-pressure cycling, and mesothermal gold-quartz deposits

open access: closedGeology, 1988
Many mesothermal gold-quartz deposits are localized along high-angle reverse or reverse-oblique shear zones within greenstone belt terrains. Characteristically, these fault-hosted vein deposits exhibit a mixed "brittle-ductile" style of deformation (discrete shears and vein fractures as well as a schistose shear-zone fabric) developed under greenschist
Richard H. Sibson   +2 more
openalex   +3 more sources

Gold-rich mesothermal vein deposits of the Republic of Korea; geochemical studies of the Jungwon gold area

open access: closedEconomic Geology, 1988
Gold vein deposits of the Jungwon area are among the first documented examples of mesothermal gold deposition in the Republic of Korea. The deposits are composed of massive quartz veins up to 1.0 m wide which occupy fault planes in Precambrian gneiss. K-Ar dating of alteration sericite (146-156 m.y.) indicates a Late Jurassic age for ore mineralization,
Kevin L. Shelton   +2 more
openalex   +3 more sources

The scale of ore-depositional systems: an important restraint on epigenetic vs remobilized syngenetic origins for Archaean mesothermal gold deposits

open access: closedGeologische Rundschau, 1990
There is general consensus that the majority of gold deposits in the important group hosted by volcanic or intrusive host rocks within Archaean granitoid-greenstone terrains have an epigenetic origin. However, there is controversy surrounding those stratabound deposits hosted by Fe-rich sedimentary rocks, such as banded iron formation (BIF), for which ...
David I. Groves, J.R. Vearncombe
openalex   +3 more sources

Sulfur Isotope Characteristics of Mesothermal Gold Deposits: Results of an Investigation of the Rio Itapicuru Region, Bahia, Brazil

open access: closedInternational Geology Review, 2006
Stable isotope analyses were carried out on sulfides from three mesothermal gold deposits of the Rio Itapicuru greenstone belt (Fazenda Brasileiro, Maria Preta, and Ambrosio mines) to constrain the source of the hydrothermal solutions. The ores are hosted in a volcanic-sedimentary sequence that evolved in an Archean cratonic area reworked during the ...
Mauro César Geraldes   +4 more
openalex   +3 more sources

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