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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.
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 ...
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.
1 de feb. de 2022 · The early-stage magmatism mainly produced Cu-Au mineralization-related dioritic intrusions, including pyroxene diorite-pyroxene monzodiorite, quartz diorite-quartz monzodiorite, and granodiorite, showing unobvious geochronological order.
Abstract. 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). Here the spectrum is subdivided into: (a) intrusion-hosted stockwork/disseminated deposits of both porphyry and non-porphyry types, the former possessing all the ...
1 de ene. de 2000 · Gold mineralization generated by magmatic-hydrothermal systems has traditionally been associated either with porphyry base and precious metal deposits within and peripheral to calc-alkalic intrusions, or with intrusions of alkalic composition. These systems form in convergent margins and are characterized by highly oxidized, I-type or magnetite ...
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 .
