Reduced porphyry copper-gold deposits: A new
Based on a synthesis of theoretical, experimental, and field data, a variation on the classic porphyry Cu model is proposed to explain the formation of reduced porphyry Cu-Au deposits and their relatively Cu-poor but Au-rich nature. The proposed reduced porphyry Cu-Au model does not contradict the current understanding of porphyry Cu-Au formation.
Geology of the Josemaría Porphyry Copper-Gold Deposit, Argentina
The Josemaría porphyry copper-gold deposit is located in the Frontal Cordillera of San Juan Province, Argentina, near the present-day northern limit of the Chilean-Pampean flat-slab segment of the central Andes, and midway between the Maricunga and El Indio metallogenic belts. The deposit is centered on small, multiphase dacite porphyry ...
Gold endowments of porphyry deposits controlled by
Porphyry deposits are natural suppliers of most copper and significant gold to our society. Whereas the Cu-richest (Au-poor) porphyries are related to Andean-type subduction and
PORPHYRY DEPOSITS
The major products from porphyry copper deposits are copper and molybdenum or copper and gold. The term porphyry copper now includes engineering as well as geological considerations; It refers to large, relatively low grade, epigenetic, intrusion-related deposits that can be mined using mass mining techniques. Geologically, the deposits occur ...
The Anatomy of an Alkalic Porphyry Cu-Au System
Endeavour Copper-Gold Porphyry Deposits, Northparkes, New South Wales: Intrusive History and Fluid Evolution Economic Geology. Related Book Content. Genesis and fluid evolution of the East Kemptville greisen-hosted tin mine, southwestern Nova Scotia, Canada Ore-bearing Granite Systems; Petrogenesis and Mineralizing Processes ...
Discovery about how porphyry-type copper …
Porphyry-type deposits provide most of the world's copper and molybdenum, as well as large amounts of gold and other metals, which are of increasing demand for green technologies such as electric ...
Tectonics and Metallogeny of the Tethyan Orogenic Belt
Abdul Razique, Richard Tosdal, Farhad Bouzari, 2016. "Anatomical Similarities and Differences Between Spatially Associated Porphyry Copper-Gold Deposits at the Reko Diq H14 and H15 Complex, Balochistan, Pakistan", Tectonics and Metallogeny of the Tethyan Orogenic Belt, Jeremy P. Richards. Download citation file: Ris (Zotero) Refmanager; EasyBib ...
2.2 Porphyry-epithermal mineral system | Geoscience …
The world-class Boddington deposit (total resources at 31 December 2010 of 1.53 Gt grading 0.102% Cu and 0.579 g/t Au), in the Saddleback Greenstone Belt of the Southwest Terrain of the Yilgarn Craton, is interpreted as a ∼ 2707 Ma porphyry Cu-Au deposit that has been overprinted by a ∼ 2629 Ma lode gold event (McCuaig et al., 2001: Stein ...
(PDF) Reduced porphyry copper-gold deposits: …
I deposit is similar to a reduced porphyry copper–gold deposit, given the widespread occurrence of primary and/or hydrothermal pyrrhotite and common CH4-rich and rare N2-rich fluid inclusions ...
An Archean Porphyry-Type Gold Deposit: The Côté Gold Au(-Cu) Deposit
The Archean low-grade, large-tonnage Côté Gold Au(-Cu) deposit is the first large gold deposit discovered in the Swayze greenstone belt, Ontario, Canada.
Generation of porphyry copper deposits by gas–brine …
Porphyry copper deposits, that is, copper ore associated with hydrothermal fluids rising from a magma chamber, supply 75% of the world's copper. They are typically associated with intrusions of ...
The geology, structure and mineralisation of the Oyu Tolgoi porphyry …
The Oyu Tolgoi porphyry copper-gold-molybdenum deposits are located in the South Gobi Desert of Mongolia (43°01′40″N, 106°51′34″E), approximately 550 km due south of the capital, Ulaanbaatar, and 80 km north of the Chinese border. They represent the largest high-grade group of Palaeozoic porphyry deposits currently known in the world.
The role of porphyry-related skarns in the Chating porphyry copper and
1. Introduction. Porphyry and associated skarn deposits supply most of the world's Cu, Au and Mo and generally occur together when the wall rocks include limestone, sandstone, and calcareous volcanic rocks (Sillitoe, 2010, Meinert et al., 2005).Both skarn and porphyry alteration and mineralization can contribute to the metal resource, for example, the …
Crustal magmatic controls on the formation of porphyry …
The geological characteristics, geochemical signature and geophysical expression of porphyry copper-(gold) deposits in the circum-Pacific region. ASEG Ext. Abstr. 2019, 1–4 …
Potassium silicate alteration in porphyry copper‑gold deposits…
Uniquely, the Grasberg porphyry copper‑gold deposit retains clear evidence of its volcanic setting and depth of formation. The Grasberg deposit comprises about 2 km 3 of altered rock material and is centered within a diatreme that formed during the partly-eruptive, early 3.6–3.3 Ma Dalam stage of the Grasberg Igneous Complex which intruded a sequence of …
Porphyry Copper Deposit Geology PPT
Porphyry copper deposits ppt. Here let's understand the geology of porphyries and iron oxide copper gold deposits or IOCG as they are known. These are somewhat the giants of the ore deposits world. As a mining interested learner, the geology of porphyry copper deposits is vital to your education.. Now in the first Exploration Geology Course I …
A Geological Review of the Tampakan Copper-Gold Deposit…
Located on the island of Mindanao in the Southern Philippines, the Tampakan copper-gold deposit represents a major high-sulfidation epithermal deposit superimposed on an underlying porphyry copper ...
Porphyry Copper Deposit Density | Economic Geology
Porphyry copper deposit densities vary from 2 to 128 deposits per 100,000 km 2 of exposed permissive rock, ... Geology of the Bajo de la Alumbrera Porphyry Copper-Gold Deposit, Argentina Economic Geology. Related Book Content. The Bawdwin Mine, Myanmar: a review of its geological setting and genesis ...
Some thoughts on gold-rich porphyry copper deposits
Porphyry copper deposits carrying more than 0.4 gm/ton gold are briefly described from northwest Argentina, northwest Pakistan, the Intermontane belt of British Columbia, the Philippines, Sulawesi, Papua New Guinea, Sabah and Puerto Rico. Gold is normally present in potassium silicate alteration, which commonly carries an unusually high magnetite content. …
Gold endowments of porphyry deposits controlled by
Porphyry deposits are natural suppliers of most copper and significant gold to our society. Whereas the Cu-richest (Au-poor) porphyries are related to Andean-type subduction and typical calc ...
(PDF) The formation of porphyry copper deposits
Porphyry ore deposits are the source of much of the copper, molybdenum, gold and silver used by humans. Porphyry ore typically forms in magmatic arcs above subduction zones.
Gold in porphyry copper deposits: its abundance and fate
Cu/Au atomic ratios of porphyry copper ore deposits form a continuous range from about 5000 to 5,000,000 with a median near 40,000, which separates gold-rich and gold-poor …
Everything You Need to Know About Copper Porphyries
Presented by Entrée Gold. What is a Porphyry? Porphyry deposits are very large, polymetallic systems that typically contain copper along with other important metals. Much of today's mineral production depends on porphyries: 60% of copper, 95% of molbdenum, and 20% of gold comes from this deposit type. Where and How are Porphyries Formed?
Porphyry Deposits: The World's Largest Source of …
These deposits provide over 60% of the world's copper and include other important metals such as molybdenum, gold and silver. Porphyry copper deposits are known for their low grades and very high tonnage. A …
Gold in porphyry copper deposits: Its abundance and fate
Cu/Au atomic ratios of porphyry copper ore deposits form a continuous range from about 5000 to 5,000,000 with a median near 40,000, which separates gold-rich and gold-poor deposits. Gold is found ...
Geophysical signatures of the gold rich porphyry copper deposits: A
In gold-rich porphyry copper deposits, phyllic alteration zone often contain sulfide mineralization, therefore, this zone could be identified by high chargeability anomalies and low resistivities in the induced polarization surveys. The potassic alteration zone also contains sulfide minerals and is characterized in IP data with moderate to high ...
Imaging the subsurface architecture in porphyry copper deposits …
An essential part of the world's remaining mineral resources is expected to reside deep in the crust or under post-mineralization cover. For porphyry copper deposits, the world's primary source ...
The Red Chris Porphyry Copper-Gold Deposit, Northern …
Red Chris is a Late Triassic porphyry Cu-Au-(Mo) deposit in the Stikinia island-arc terrane in northern B.C. Late Triassic sedimentary and volcanic rocks of the Stuhini Group host a series of Late Triassic to Early Jurassic (204–198 Ma) diorite to …
Triggers for the formation of porphyry ore deposits in
Porphyry ore deposits supply much of the copper, molybdenum, gold and silver used by humans. A review of the main processes that trigger porphyry ore formation suggests that sulphide saturation of ...
The Chain of Processes Forming Porphyry Copper …
Porphyry deposits show a large range of concentrations in three main ore elements Cu, Au, and Mo, to the point that some deposits are mined for a single commodity such as porphyry gold …