Porphyry epithermal deposits
WebEpithermal gold ± copper ± silver deposits form in shallow crustal environments, at 1–3 km depth (White and Hedenquist, 1990, 1995; Simmons et al., 2005). Low-sulfidation deposits form distal to their source magmas, through mixing and transport by deep groundwater fluids. These are characterised by reduced sulfur species and H 2 S. In contrast, high … Webthe porphyry and epithermal deposits in northern Peru are closer in location and age. The major high-sulfidation deposits, from north to south, are Yanacocha (a series of deposits formed at 13.6 to 8.2 Ma), Lagunas Norte (~17 Ma), Calaorco (La Arena; 25.8 Ma) and Pierina (14.5 Ma), with the intermediate (to high-) sulfidation veins of
Porphyry epithermal deposits
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WebDec 1, 2015 · Introduction. Argentina is known for several world-class gold deposits such as those in the El Indio–Pascua gold district which hosts the Veladero and Pascua-Lama high sulfidation epithermal gold deposits (only the Pascua deposit is located in Argentina, with the Lama deposit being on the Chilean side of the border), and the Deseado Massif gold … WebMar 1, 2009 · Porphyry Cu ± Mo ± Au and some epithermal Au deposits are formed from hydrothermal fluids exsolved from cooling, water-rich, calc-alkaline magmas emplaced in …
WebSep 5, 2024 · Although highly dispersed, critical Re metal has attracted lots of attention from geoscientists, the controlling factors of Re-content variation are not completely understood, especially with regards to the genetic relationship between Re-bearing Mo polymetallic deposits and plate subduction evolution. It is well documented that the South China Mo … WebThis paper is a work in progress based upon my experiences in the exploration for, and evaluation of, magmatic arc epithermal gold and porphyry copper-gold deposits (Figure 1). It therefore draws upon, and updates, recent studies (Corbett and Leach, 1998; Corbett, 2001a & 2001b). This review focuses upon the essential features of the different ...
WebAlkalic Epithermal Deposits The alkalic epithermal systems have features similar to the “low sulfidation” family of calc-alkalic epithermal deposits. Discriminating features include the presence of roscoelite (e.g., Porgera, Emperor), and anhydrite (e.g., Lihir, Porgera), and negative sulfur isotopic compositions of sulfide WebAug 5, 2024 · Porphyry and epithermal deposits are the major source of Cu, Mo, and Au, and significant source of Ag, Sn, W, and rare-earth elements 2. Porphyries can occur in subduction zones, and also post ...
WebPorphyry-type deposits form in geological settings similar to those of epithermal deposits. The main difference with regard to preservation potential is that the former form at … high5 productsWebJan 1, 2024 · Porphyry-epithermal mineral systems are defined as large volumes (10−>100 km 3) of hydrothermally altered rock centered on shallow-intruded porphyry stocks (i.e., porphyry Cu deposit sensu stricto) with a typical stockwork and disseminated mineralization that may be accompanied by skarn, carbonate-replacement, sediment-hosted, and high- … how far is fawnskin from big bearMineral deposits that form in the porphyry-epithermal mineral system generally have a spatial and temporal association with intermediate to felsic sub-aerial volcanic rocks and related sub-volcanic intrusions. Although, geologically recent porphyry-epithermal mineral systems are mostly thought to form in … See more Although most workers concur that magmas were probably the energy source in the porphyry-epithermal mineral system, the evidence is not definitive as to the role of magmatic-hydrothermal fluids as sources of fluid, sulfur … See more In the porphyry-epithermal mineral system, pathways for fluids and their contained metals, ligands and sulfur include faults, stratigraphic aquifers and crystallising intrusive bodies. … See more Because of the lack of major, geologically young, felsic to intermediate (i.e., Mesozoic and younger) magmatic belts, deposits of the … See more Mechanisms for ore deposition in the porphyry-epithermal mineral system are many and varied, with the main mechanisms being depressurisation and associated processes such as boiling, fluid mixing, cooling, … See more high 5 property managementWebSep 20, 2024 · Welcome to Geology Simply Explained. The purpose of these videos is to provide very simple explanations of very complicated geological processes that form mi... high 5 propellerWebIn Indonesia, gold is typically mined out from epithermal, porphyry and skarn deposit types occurred within volcanic belts along magmatic arc or active continental margin setting. Numerous gold prospects, however, are recently discovered in association with metamorphic and sedimentary rocks. how far is fatima from lisbonWebAug 28, 2024 · It is characterized by a great number of Kuroko-type volcanogenic massive sulfide deposits as well as vein-type polymetallic deposits, porphyry and epithermal precious metal deposits. Subject neighboring deposits are hosted within the voluminous Cretaceous-Eocene granitoids and interbedded volcanic rocks and carbonates. how far is fayetteville arkansas from meWebin the development of epithermal-porphyry deposits, with profound implications on mineral exploration of these vein deposits (Corbett, 2008; Leach and Corbett 2008). Figure 2. how far is fayetteville nc from benson nc