Resultado de búsqueda
1 de ene. de 2024 · Our data reveal the absolute timing of gold mineralization and define two periods for the gold mineralization in the central Jiangnan orogen that locally cause overlap of features at the Tuanshanbei deposit, further constraining the genetic links of gold deposition with the regional orogenic events.
1 de dic. de 2021 · Through multi-proxy investigation of the different stages and types of pyrite, we postulate that the Yanjingou gold deposit is an orogenic gold deposit related to intrusive rocks formed during Middle Triassic compressional transformation.
3 de mar. de 2021 · Gold mineralization occurs in a variety of contexts, including orogenic gold systems (OGS), magmatic-hydrothermal systems, and Au-enriched volcanogenic massive sulfide (VMS) deposits. Most gold accumulated in greenstone belts is associated with OGS, which are structurally controlled deposits formed by the circulation of fluids produced by the ...
Hace 6 días · Based on the geochemical findings in this study, orogenic gold mineralization in the belt is associated with galena, sphalerite, monazite, bastnaesite, and manganese oxide minerals and has a metamorphic origin. ... In addition, the greenschist belt occurs together with intrusive igneous rocks [1, 3, 4, 7, 8]. Fig. 1.
Eocene overprinting of Cretaceous mineralization around Gold Acres and Pipeline is possible but cannot be demonstrated from any data, and the age of these deposits is undetermined. The nearest known Eocene intrusions are the ~39 Ma granodiorite and 35.8 Ma Cortez-type rhyolites at Tenabo, 6 km north of Gold Acres .
17 de oct. de 2022 · Wall-rock sulfidation during pressure cycling between supralithostatic and near-hydrostatic conditions causes the deposition of early microscopic gold within sulfide minerals.
A broad spectrum of gold mineralization styles is found in the epizonal intrusive environment, and a number of these give rise to world-class gold deposits (Figure 6.1).
