of global porphyry systems. About 5-10% of igneous rocks are high-K, yet these magmas are associated with approximately 25% of the combined Cu+Au+Ag US dollar value of global porphyry and epithermal deposits. The largest and richest gold-bearing, global porphyry systems are related to potassic magmas.Web

The geology, alteration and mineralization observed throughout the property are all indicative of copper - gold ± molybdenum bearing porphyry systems. In addition to the Dok Trend, the property hosts multiple other target zones including other porphyry targets, epithermal targets, and a nickel-cobalt target.Web

Hannan holds 1,001 sq km of mineral tenure prospective for back-arc porphyry copper-gold systems at the Valiente Project in central eastern Peru. A total of 84 granted mining concessions for 811 sq km have been granted, while the remainder remain under application.Web

The structural setting of southwest Pacific Rim porphyry systems is outlined in Chapter 3. The major portion of the gold and most of the copper resources of the southwest Pacific Rim occur within porphyry copper-gold deposits (Fig. 1.2), formed in subduction related I-type volcanoplu-tonic arcs (Sillitoe, 1992).Web

Historic exploration on the Rayfield Property has been largely constrained to a ~505-hectare zone hosting an extensive copper-gold porphyry system outlined by soil sampling, historic drilling, and ...Web

All these recognized mineral occurrences at Iskut are interpreted as high-level expressions of copper-gold porphyry systems aligned along this regional northeast structural trend. The trend has ...Web

Abstract. Porphyry copper±molybdenum±gold deposits (PCDs) are the most representative magmatic-hydrothermal metallogenic system above subduction zones …Web

The Biely Vrch deposit in the Western Carpathians is assigned to the shallow, sulfide-poor porphyry gold deposit type and has an exceptionally low Cu/Au ratio. According to 3-D geochemical models, there is a limited spatial correlation between Au and Cu due to the primary introduction of gold by a salt melt and Cu by low-density vapor. …Web

Porphyry copper and VHMS systems are well characterised 12,13,14, however, genetic models for orogenic gold deposits, particularly sources of fluids, are debated, with potential sources including ...Web

Sillitoe has introduced a concept of two types of porphyry gold deposits. The porphyry gold systems in the Maricunga and Javorie belts are characterized by a …Web

Porphyry Deposits. Modified date: 23/04/2023. Porphyry deposits are a type of mineral deposit that form from large-scale hydrothermal systems associated with intrusive igneous rocks. They are …Web

Abstract—This paper focuses on new data for palladium-bearing mineral phases in the ores of the Malmyzh porphyry gold–copper deposit situated approximately 220 km northeast of Khabarovsk in the Russian Far Eas. The Malmyzh area comprises the Early Cretaceous terrigenous sediments, which are intruded by the Albian to …Web

Gold endowments of porphyry deposits controlled by precipitation efficiency | Nature Communications. Porphyry deposits are natural suppliers of most copper and …Web

Others have barely any gold at all but may have plenty of molybdenum. Large Size, Low Grade – Porphyries typically have 100 million to 5 billion tonnes of ore with a lower grade (0.2% to >1% copper). It is the size of these deposits that allow for bulk mining and economies of scale. Long Mine Life – The size of porphyry systems usually mean ...Web

Hole 5 returns 277 meters of 0.80 gpt gold. Toronto, Ontario-- (Newsfile Corp. - December 14, 2023) - Seabridge Gold (TSX: SEA) (NYSE: SA) reports today that its first drill program on the Snip North target at its owned Iskut property in Northwestern British Columbia's Golden Triangle has found a new porphyry mineral system which …Web

According to Sillitoe (), porphyry Cu–Mo deposits are often related to continental arcs in a subduction zone.Cu–Au deposits mainly occur in oceanic ridges and island arcs and have fewer percentages in some continental arcs of a subduction zone (Fig. 1a). Most porphyry deposits are related to acidic to intermediate porphyry intrusive …Web

The Jebel Ohier mineralized system is situated in a remote desert region some 300 km to the west-northwest of Port Sudan (Fig. 1) and was first documented during reconnaissance fieldwork carried out by Bureau de Recherches Géologiques et Minières (BRGM) in the early 1980s as part of the regional exploration program that located the …Web

Abstract. Porphyry copper deposits are among the largest reservoirs of gold in the upper crust and are important potential sources for gold in lower temperature …Web

A second magmatic-hydrothermal event resulted in a sericite- and pyrophyllite-rich advanced argillic overprint, which introduced more copper and gold to the system and recrystallized preexisting sulfides into both high and low sulfidation assemblages with high-fineness gold inclusions in pyrite and chalcopyrite and solid …Web

In gold-endowed greenstone belts, ore bodies generally correspond to orogenic gold systems (OGS) formed during the main deformation stage that led to craton stabilization (syntectonic period). Most OGS deposits postdate and locally overprint magmatic-hydrothermal systems, such as Au-Cu porphyry that mostly formed during …Web

Seabridge Gold photo. Seabridge Gold (TSX: SEA) (NYSE: SA) has achieved its 2023 goal of finding a new porphyry mineral system from drilling on the Snip North target of its -owned Iskut ...Web

The focus of these recent holes was to test for mineralization along one of the priority target areas south on strike from the known T2 domain, towards the Sioux Ajax fault (see Figure 2). A ...Web

Xin-Kai Hu, Li Tang, Shou-Ting Zhang, Toshiaki Tsunogae, M. Santosh, Li Sun, Christopher J. Spencer, Heejin Jeon, Liang Wang; Formation of the Qiyugou porphyry gold system in East Qinling, China: insights from timing and source characteristics of Late Mesozoic magmatism.Web

PDF | On Jan 1, 1998, Greg J. Corbett and others published Southwest Pacific Rim Gold-Copper Systems: Structure, Alteration, and Mineralization | Find, read and cite all the research you need on ...Web

Samples collected from the road-cut exposure returned values of 1.37 g/t gold and 663 ppm copper, and 0.54 g/t gold and 411 ppm copper (news release dated June 27, 2023). These strong gold results ...Web

Hannan holds 1,001 sq km of mineral tenure prospective for back-arc porphyry copper-gold systems at the Valiente Project in central eastern Peru. A total of 84 granted mining concessions for 811 ...Web

Accretionary or peripheral orogens contain gold deposits in the Archean of Australia, Canada, Africa, India, and Brazil and the Mesozoic and Cenozoic gold fields of …Web

Porphyry copper ores and gold-bearing sulphides are significant contributors to overall world gold production. Flotation is the principal process for pre-concentration …Web

Unlike orogenic gold systems that generally formed at >5 m depth during the waning phase of compression and tectonic shortening in the host convergent margin, porphyry-related systems normally formed at shallower depths and much earlier during an early transient extensional-compressional phase which would be followed by extreme …Web

porphyry), so far less knowledge and understanding is assigned to deep seated mineralization (porphyry, Iron Oxides-Copper-Gold/IOCG). A specific relationship between those two deep seated ore styles emerges, that is the IOCG, confined to magmatic-hydrothermal type, is situated in the root zone of a deep porphyry system. ComplementaryWeb

A new classification is proposed that includes (1) OGS and OGS-like deposits dominated by metamorphic and magmatic fluids, respectively; (2) porphyry and IRGS that may contain gold remobilized ...Web

Hannan holds 1,001 sq km of mineral tenure prospective for back-arc porphyry copper-gold systems at the Valiente Project in central eastern Peru. A total of 84 granted mining concessions for 811 sq km have been granted, while the remainder remain under application.Web

However, since the late 1990s, several authors have proposed that "intrusion-related gold system" be treated as a separate group from orogenic deposits, along the lines of the porphyry copper classification long advocated by …Web

Gold can be removed from porphyry copper systems by vapors that separate at high temperatures or by lower-temperature hydrothermal solutions that alter …Web

There are more than 70 defined Permo-Carboniferous Intrusion-related Gold Systems spread across the Charters Towers Province of north-east Queensland. The majority have been emplaced at mesozonal or porphyry level and exhibit a range of styles dominated by vein complexes and breccias.Web

Within the porphyry system, gold- and copper-bearing brine and acidic volatiles interact in a complex manner with the stock, its wall rocks, and ambient meteoric and connate fluids. Although several processes involved in the evolution of gold-rich porphyry deposits remain to be fully clarified, the fundamental issues have been …Web

Gold in porphyry copper systems | U.S. Geological Survey Publications Reports Gold in porphyry copper systems January 1, 1990 View Document No abstract available. …Web

The formation and deposition of porphyry copper–gold systems in Papua New Guinea and the Solomon Islands occurred between 24 and 20 Ma and then again between 12 and 6 Ma [1,2]. In Papua New Guinea, there are quite a few porphyry systems which have been dated younger than 6 Ma, such as Panguna (3.4 Ma) and Ok Tedi, at …Web

Abstract. The structural setting of southwest Pacific Rim porphyry systems is outlined in Chapter 3. The major portion of the gold and most of the copper resources of …Web

The Lut Block is a potential porphyry-style mineralized region in Iran including the well-explored Shadan porphyry gold-copper deposit, which has an extensive zone of gold- and copper-bearing stockwork-like sheeted veins. The structural setting of this deposit is a key to understanding the genesis of the mineralization. Our field studies …Web