Copper Deposits

2.2 Ore genesis, grade and mineralogy of porphyry copper deposits. Porphyry copper deposits are formed when ore minerals are precipitated from high-temperature hydrothermal fluids (300–700 °C) exsolved from cooling magma in volcanic arc settings above subduction zones (Fig. 2; Richards, 2013).This type of copper deposit is named after the large-grained (cm-scale) …

WhatsApp: +86 18221755073

Formation of iron oxide–apatite deposits

| Possible modes of ioa deposit formation in a volcanic arc setting. Large iron oxide-apatite (IOA) deposits could form at depths of aproximately 3-5 km below the surface owing to an optimal ...

WhatsApp: +86 18221755073

A review of the geological characteristics and spatiotemporal

Gold and Cu deposits are developed in the CAOB (Lobanov et al., 2014, Pirajno et al., 2011, Seltmann et al., 2014, Soloviev et al., 2022a, Soloviev et al., 2022b, Yakubchuk et al., 2005, Daukeev, 2004), but there are relatively fewer Cu–Au deposits in the XCAOB.Although a lot of results have been achieved of Cu–Au deposits in the XCAOB, bue these above results are …

WhatsApp: +86 18221755073

The role of magmas in the formation of hydrothermal ore …

as the sedimentary-hosted deposits rich in copper, lead and zinc that form by compactive expulsion of fluids from large continen­ tal basins, and lode gold deposits associated with metamorph­ ism. Nevertheless, the flux of hydrothermal fluids responsible for these deposits is minor compared to that caused by circulation

WhatsApp: +86 18221755073

Copper Deposits of the World

seminated copper deposits in volcanic rocks that have no massive ore with them, although pyrite is usually present. About 13% of the known inventory of copper is contained in this type of deposit amounting to over 50 Mt of metal, although probably only half of this exists today as reserves. Individual deposits vary from quite small ones

WhatsApp: +86 18221755073

Copper Deposits

34 rowsPorphyry copper deposits may be subdivided according to their metal inventory, type of alteration and chemistry of hydrothermal fluid, tectonic setting or chemistry of associated magma.

WhatsApp: +86 18221755073

Lecture 5 hydrothermal ore deposits | PPT

iii) Epithermal Type 1) Epithermal deposits usually form temperature between 100 and 200°C. 2) Epithermal deposits usually form at shallow depths. Deposited normally within 1,000 m (3,000 ft.) of surface; …

WhatsApp: +86 18221755073

Formation Conditions of Copper-Sandstone and Copper-Shale Deposits

The concept introduced here suggests a common provenance of copper origin for all cupriferous sandstones and shale-type deposits, the source of copper being terrigenous red-bed formations deposited under arid conditions. Copper was leached from these rock deposits by...

WhatsApp: +86 18221755073

Re–Os and U–Pb Geochronology of Porphyry and Skarn Types Copper

The Cu mineralization occurs in marble and hornstone at the contact with Cretaceous granodiorite. There are dozens of ore bodies in the mineralized zone, which is 500 m long, 200 m wide, and 400 m deep, and the ore bodies are vein and lenticular in form. 3.5 Binghugou Cu deposit. The Binghugou skarn-type Cu deposit lies southeast of Linjiang City.

WhatsApp: +86 18221755073

How do many copper deposits form?

Find step-by-step Earth science solutions and the answer to the textbook question How do many copper deposits form? A. near intermediate to felsic intrusions that have a porphyritic texture B. in massive sulfide deposits formed as black smokers on the seafloor C. from mixing of different types of groundwater D. all of these.

WhatsApp: +86 18221755073

The Chain of Processes Forming Porphyry Copper Deposits—An …

Different evolution paths controlling density, salinity, and phase state of fluids contribute to selective metal precipitation: porphyry Au deposits can form at shallow …

WhatsApp: +86 18221755073

Diversity of Gold Deposits, Geodynamics and Conditions of …

This type of deposit is characterized by low to medium metal contents, but very high tonnages ( [7] [21] ). Porphyries occur at shallow depth (1 to 5 km), around calc-alkalic intrusions related to subduction zones, island arcs or continental Cordilleras [22] . Main metals in this type of deposit are copper, molybdenum and gold.

WhatsApp: +86 18221755073

Mineral Deposits: Types and Geology | SpringerLink

In summary, linking deposit types directly to ore-forming processes and genesis is certainly the preferred way to classify (e.g., Herrington ; ... Porphyry copper deposits (PCD) are large, low- to medium-grade, Cu ± Au ± Mo hydrothermal deposits related to igneous intrusions, being the largest source of the world in copper and a major source ...

WhatsApp: +86 18221755073

Boiler Water Deposits

Common feedwater contaminants that can form boiler deposits include calcium, magnesium, iron, copper, aluminum, silica, and (to a lesser extent) silt and oil. Most deposits can be classified as one of two types: scale that crystallized directly onto tube surfaces

WhatsApp: +86 18221755073

(PDF) Ore deposit types and their primary expressions

types of ore deposits form in the secondary environment and then undergo later weathering so that they may have syn-depositional and post-depositional patterns that have both formed in the secondary

WhatsApp: +86 18221755073

9.3.2: Hydrothermal Ore Deposits

9.3.2.1 Porphyry Deposits Figure 9.84: The mine workings at Morenci, Arizona. Porphyry deposits are a special kind of hydrothermal deposit. They form when hydrothermal fluids, derived from magmas at depth, carry metals toward the surface and deposit minerals to create disseminated ore deposits.

WhatsApp: +86 18221755073

USGS Mineral Resources Program Copper—A Metal for the …

the basis of how the deposits formed. Porphyry copper deposits, which are associated with igneous intrusions, yield about two-thirds of the world's copper and are therefore the world's most important type of copper deposit. Large copper deposits of this type are found in mountainous regions of western North and South America. Another ...

WhatsApp: +86 18221755073

Formation of Sedimentary Rock-Hosted Stratiform Copper Deposits through

The major deposits of the Katangan and Permian basins also formed near the base of the two largest-known subaerial mountain ranges in Earth history, having formed during major continent-continent ...

WhatsApp: +86 18221755073

Porphyry Deposits

Porphyry copper deposits comprise three broad types: plutonic, volcanic, and those we will call "classic". The general characteristics of each are illustrated in photographs linked near the …

WhatsApp: +86 18221755073

Geology and Genesis of Major Copper Deposits and Districts of …

Furthermore, the copper endowment of all deposit types undoubtedly benefits from optimization of the ore-forming processes involved. Tectonic setting also plays a fundamental role in copper metallogeny. Contractional tectonomagmatic belts, created by flat-slab subduction or, less commonly, arc-continent collision and characterized by crustal ...

WhatsApp: +86 18221755073

Porphyry copper deposits of the world: database, map, and grade …

This publication contains a computer file of information on porphyry copper deposits from around the world. It also presents new grade and tonnage models for porphyry copper deposits and …

WhatsApp: +86 18221755073

The chain of processes forming porphyry copper deposits

Mo, Cu and Au endowment in porphyry-type ore deposits Data for Figure 2 were taken from Mutschler et al. (1999) with addiLonal points for major Mo ± Cu deposits in Asia listed by Gao et al. (2018). For points along the le[ axis, no Cu data were reported. Figure 3 comparing Au and Cu endowments of porphyry deposits uses the compilaLon by Chiaradia

WhatsApp: +86 18221755073

Hydrothermal Ore Deposits Flashcards

Study with Quizlet and memorize flashcards containing terms like Ores formed by hydrothermal processes (hydrothermal veins), Ores formed by igneous processes within the earth (gravity settling), Ores formed by sedimentary processes (Residue of bauxite), Hydrothermal ore deposits are an important and varied group of ore deposits that form many of the worlds richest ore …

WhatsApp: +86 18221755073

Geological ore deposits

Hydrothermal deposits cover a wide range of different deposits types but all form from hot circulating water-rich fluids. These include the two main types of gold deposits - epithermal and lode gold deposits along with replacement deposits in calcareous sequences (Mississippi Valley deposits), base-metal vein deposits and replacement skarn ...

WhatsApp: +86 18221755073

Porphyry Deposits: The World's Largest Source of Copper

Porphyry copper deposits are generally composed of a "plug-like" igneous intrusion– a large magma body that is emplaced beneath a volcanic system. On average these deposits can have a vertical and horizontal extent of 1-2 km and can range from tens of millions to more than one billion tons in size. …

WhatsApp: +86 18221755073

Copper Deposits in Sedimentary and Volcanogenic Rocks

Copper deposits occur in sedimentary and volcanogenic rocks within a wide variety of geologic environments where there may be little or no evidence of hydrothermal alteration. Some deposits may be hypogene and have a deep-seated source for the ore fluids, but because of rapid cooling and dilution during syngenetic deposition on the ocean floor, the resulting deposits are not …

WhatsApp: +86 18221755073

Geology of Copper | Properties, Mining, and …

To understand how copper is formed, it helps to look at how porphyry deposits—the largest current sources of copper ore—form. The orebodies form in hydrothermal veins that are born in underground magma …

WhatsApp: +86 18221755073

Metallogenic model of sandstone-hosted copper deposits: a case …

Sandstone-hosted copper deposits primarily refer to stratified copper minerals found in conglomerates, sandstones, siltstones and other clastic sedimentary rocks (Huang et al., 2019; Maghfouri et al., 2020; Zhang et al., 2021).These deposits are typically located in the latitudinal range of 20°–30° on both sides of the equator (Hitzman et al., 2010; Cao and Xu, 2021).

WhatsApp: +86 18221755073

Tectonic Settings of Metal Deposits

More than half of the world's supply of copper comes from the Porphyry Copper Deposits of this region. Important deposits associated with present and former convergent margins are: Base metals (Cu, Pb, Zn, Mo). Precious metals (Pt, …

WhatsApp: +86 18221755073

Ore forming process of magmatic nickel-copper-cobalt sulfide deposits

Jinchuan deposit is a typical example of "forming big ore deposits in small intrusive rocks" type (mentioned earlier). The presence of "small intrusive rocks" means the Jinchuan deposit cannot be sourced in-situ from its host rocks [23]. However, systematic study of the deposit has led to the interpretation that the parental magma ...

WhatsApp: +86 18221755073