Afbeeldingen van porphyry copper deposits
Characteristics of porphyry copper deposits include:
Porphyry copper deposit | mineralogy | Britannica
19-11-2018 · Porphyry copper deposit, large body of rock, typically a porphyry of granitic to dioritic composition, that has been fractured on a fine scale and through which chalcopyrite and other copper minerals are disseminated.Porphyry copper deposits commonly contain hundreds of millions of metric tons of ore that averages a fraction of 1 percent copper by weight; although they are low-grade, the ...
How to make porphyry copper deposits - …
1-1-2020 · Porphyry copper deposits (PCDs) represent shallow level intrusions (2–5 km) in the crust. Mineralization of Cu ores tend to occur at the tops of porphyry systems in cupolas. Possible regimes where Cu may be mobilized include hydrothermal circulation at mid-ocean ridge centers, dehydration or melting of the subducting slab, and late stage scavenging by magmatic fluids (green arrows).
How Much Water in Basaltic Melts Parental to …
Porphyry copper deposits are formed by aqueous fluids exsolved by differentiated, mantle-derived magmas variably mixed with crustal melts. Water is essential to form porphyry Cu mineralization, and this explains why these deposits are found only at convergent margin settings, where subduction has enriched the mantle source of magmas with slab-derived H2O.
Porphyry copper deposits in China | Request PDF
30-4-2020 · Request PDF | Porphyry copper deposits in China | Porphyry Cu deposits in China contain a total resource of ~47 million tonnes (Mt) Cu at average grades ranging mostly from …
Porphyry Copper Deposit Model - USGS
This report contains a revised descriptive model of porphyry copper deposits (PCDs), the world’s largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of molybdenum, gold and silver.
Geology of Porphyry Copper Deposits
Understanding Geology of Porphyry Copper Deposits and formations using models around the World. Porphyry Copper Deposits are the largest source of Cu/Mo/Au.
Porphyry copper deposits of the world - USGS
Porphyry copper deposits of the world. Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using GIS.
Preliminary Model of Porphyry Copper Deposits
Porphyry copper deposits form in continental magmatic arcs along convergent plate-margin boundaries or in island-arc environments. The deposits are associated with subduction-related volcanic centers, although in some examples, they are thought to be associated with postcollisional volcanism.
The geological characteristics, geochemical signature and ...
mineralization. Porphyry copper deposits are large (commonly hundreds to thousands of million tonnes) and low to medium in grade (0.3 to 1.5% copper). The majority of gold-rich porphyry deposits occur in the circum-Pacific and commonly contain 0.3 to 1.6 g/t gold. The general characteristics of porphyry systems include:
Porphyry - an overview | ScienceDirect Topics
Porphyry deposits are large, low- to medium-grade deposits in which primary (hypogene) ore minerals are dominantly structurally controlled and are spatially and genetically related to felsic to intermediate porphyritic intrusions (Kirkham, 1971, 1972).The main metals in a porphyry are Cu, Mo, and smaller amounts of gold, although Sn, W, and Ag can be found in some porphyry deposits (Kirkham ...
PORPHYRY DEPOSITS - Earth Science
PORPHYRY COPPER CLASSIFICATION 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 bottom of this page.& 1.
ORE DEPOSITS 101 - Part 3 - Porphyries, Skarns & …
7-7-2017 · Porphyry-type ore deposits: origins, fertility indicators and exploration targeting - Duration: 1:01:34. ... Depósitos tipo IOCG (Iron Oxide Copper Gold) - Duration: 18:11.
Exploration of Porphyry Copper Deposits
So how do we explore for Porphyry Copper Deposits which are completely covered by barren younger rocks? Well let’s back up a bit, we know that porphyries form under large subduction related volcanoes and that most of these are located under the ring of fire around the subducting pacific plate another fertile subduction zone occurs in Balkans, Turkey, Iran and Pakistan. So this gives us a ...
What Investors Need to Know About Porphyry …
Porphyry deposits are one of the most important sources of copper and molybdenum, and are also major sources of silver, gold, and tin.In addition, porphyry deposits may host valuable by-products ...
(PDF) The formation of porphyry copper deposits
Porphyry copper deposits, currently being the dominant source for Cu ± Mo ± Au, are formed in arc-related settings and temporally and spatially associated with large voluminous calc-alkaline to ...