stephen j reynolds porphyry copper

Gold in porphyry copper deposits: its abundance and fate ...

Gold abundances in porphyry copper deposits vary greatly, complicating efforts to define gold-rich porphyry copper deposits. The original definition was based on the Au/Mo ratios of porphyry copper deposits with no reference to their copper content, and resulted in the suggestion that gold-rich deposits were found largely in island arc regions (Kesler, 1973).

Porphyry Copper Assessment of the Tibetan Plateau, China

Porphyry Copper Assessment of the Tibetan Plateau, China Scientific Investigations Report 2010–5090–F U.S. Department of the Interior U.S. Geological Survey Prepared in cooperation with the China Geological Survey and the Chinese Academy of Geological Sciences.

Preliminary Model of Porphyry Copper Deposits - USGS

Porphyry copper deposits result from the complex interactions and feedbacks of many processes. Owing to the complexity, a succinct definition that includes the essential attributes of this deposit class is elusive. Consequently, this descriptive model uses a working definition of a porphyry copper deposit.

Treasure of Sierra Cobre Home Page - Stephen J. Reynolds

Treasure of Sierra Cobre -- How Do We Find Copper? This website contains a geologic education module that allows students to get a feel for how we explore for mineral deposits. Any material within the site can be used with no restrictions for educational, noncommercial purposes, as …

Geology of Porphyry Copper Deposits - 911metallurgist.com

Porphyry deposits and IOCG's are the world's primary source of copper and they account for more than 60% of the copper production globally but in addition to copper they also supply of the world's molybdenum production, 10 to 15% of global uranium production and a significant proportion of the world's gold production in short they ...

Porphyry copper deposit - Wikipedia

Porphyry copper deposits are copper orebodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. In later stages, circulating meteoric fluids may interact with the magmatic ...

Exploration Tools for Linked Porphyry and Epithermal ...

Exploration Tools for Linked Porphyry and Epithermal Deposits: Example from the Mankayan Intrusion-Centered Cu-Au District, Luzon, Philippines ... T. J. Reynolds; View. ... In the porphyry copper ...

Porphyry Copper Deposits of the World: Database and Grade ...

Porphyry Copper Deposits of the World: Database and Grade and Tonnage Models, 2008 By Donald A. Singer, Vladimir I. Berger, and Barry C. Moring 2008. Tonnage of porphyry copper deposits versus average copper grades (from figure 1).

USGS Scientific Investigations Report 2010-5070-B ...

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.

MINERALIZED AREAS IN THE SAN CARLOS-SAFFORD-DUNCAN ...

identifies mineralized areas in the San Carlos-Safford-Duncan Nonpoint-Source Management Zone (Figure 1) and their potential affects on water quality. Natural processes can concentrate an element or group of elements in a particular area. Information on the location, size, and characteristics of these naturally-occurring mineralized areas may help

Porphyry copper assessment of the Central Asian Orogenic ...

The U.S. Geological Survey collaborated with international colleagues to assess undiscovered resources in porphyry copper deposits in the Central Asian Orogenic Belt and eastern Tethysides. These areas host 20 known porphyry copper deposits, including the world class Oyu Tolgoi deposit in Mongolia that was discovered in the late 1990s. The study area covers major parts of the world's largest ...

Magma Emplacement Rates and Porphyry Copper Deposits ...

Many porphyry copper deposits are associated with granitoid plutons. Their genesis is attributed to the degassing of pluton-forming intermediate to silicic magma chambers. These plutons are commonly envisioned as resulting from the slow cooling and crystallization of large magma chambers.

Volume 112 Issue 7 | Economic Geology | GeoScienceWorld

Read Volume 112 Issue 7 of Economic Geology. On the cover: Geologic north-south (pretilt) cross section of the Yerington batholith based on mapped exposures in the Singatse Range, showing projected geology from the Buckskin Range on the west and the Luhr Hill area on the east.The geology and ore deposits of this region are described in the paper by Schöpa et al. in this issue.

Magma Emplacement Rates and Porphyry Copper Deposits ...

Magma Emplacement Rates and Porphyry Copper Deposits: Thermal Modeling of the Yerington Batholith, Nevada ... R. Stephen J. Sparks. 1. School of Earth Sciences, University of Bristol, Wills Memorial Building, Bristol, United Kingdom BS8 1RJ ... Porphyry copper deposit genesis is commonly attributed to degassing of pluton-forming intermediate to ...

METALLIC MINERAL DISTRICTS AND PRODUCTION IN …

Suggestions from Bureau geologists Stephen J, Reynolds, Jon Spencer, and H, Wesley Peirce were also helpful. Joseph ... The porphyry copper districts (1a) and stratabound volcanogenic massive sulfide districts (9) are assigned designations based entirely on ... designated the age of T. J. Only copper was produced in dis­ ...

838 - AZGS Document Repository

contract to: Dr. Stephen J. Reynolds Arizona Bureau of Geology and Mineral Technology Geological Survey Branch 845 N. Park Ave. Tucson, Arizona 85719 contractor: u.S. Dept. of Interior ... Two large porphyry copper areas lie within 10 km. to the southwest and northeast of the northern Peloncillo Range. In the Gila Mountains to the west, porphyry

Formation of Porphyry Copper Deposits - Stephen J. Reynolds

Stephen J. Reynolds, Dept. of Geology, Arizona State University

porphyry copper - technicetmetaux.fr

Geology and porphyry copper-type alteration-mineralization ... The Christmas copper deposit, located in southern Gila County, Arizona, is part of the major porphyry copper province of southwestern North America. ... Formation of Porphyry Copper Deposits - Stephen J. Reynolds. Stephen J. Reynolds, Dept. of Geology, Arizona State University ...

Magma Emplacement Rates and Porphyry Copper Deposits ...

AU - Sparks, R. Stephen J. AU - Blundy, Jon D. PY - 2017/11. Y1 - 2017/11. N2 - Many porphyry copper deposits are associated with granitoid plutons. Porphyry copper deposit genesis is commonly attributed to degassing of pluton-forming intermediate to silicic magma chambers during slow cooling and …

THE EVOLUTION OF SUPERGENE ENRICHMENT IN THE …

THE EVOLUTION OF SUPERGENE ENRICHMENT IN THE MORENCI PORPHYRY COPPER DEPOSIT, GREENLEE COUNTY, ARIZONA by Merritt Stephen Enders _____ A Dissertation Submitted to the Faculty of the DEPARTMENT OF GEOSCIENCES In Partial Fulfillment of the Requirements For the Degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA

Lakeshore, Porphyry copper deposit - USGS

Einaudi, M.T., 1982, Description of skarns associated with porphyry copper plutons, southwestern North America, in Titley, S.R., ed., Advances in geology of the ...

Stephen J. Reynolds: World-Wide Web Projects and Videos

Stephen J. Reynolds: World-Wide Web Projects and Videos World Wide Web Projects. General Website: ~sreynolds/home.htm; Arizona Geology ...

Virtual Reality File -- Stephen J. Reynolds

Virtual Worlds, Virtual Field Trips, and other Virtual Reality Files. This page has links used in my NAGT Distinguish Speaker tour and NSF CCLI Workshop, most being to 3D perspectives about the the Geology of Arizona, Landscapes of the Southwest, structural geology, science-education reform, and using Bryce5 to illustrate geology.

Arizona geology and new concepts in geosciences | Arizona ...

Porphyry copper deposits are the single largest source of copper, which is the metal of choice for most electrical applications because copper is both highly conductive to electricity and is malleable. Southeastern Arizona is the center of one of Earth's three great clusters of porphyry copper deposits (the two others are in northern and ...

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.

Thermal infrared analysis of weathered granitic rock ...

Joseph R. Michalski, Stephen J. Reynolds, Thomas G. Sharp, and Philip R. Christensen ... ated porphyry copper deposit, both of which were exposed and deformed in the mid-Tertiary. [10] The Sacaton Mountains are an arc-shaped mountain range located approximately 15 …

Footprints: The Hydrothermal Alteration and Geochemical ...

Request PDF on ResearchGate | On Jan 15, 2015, Scott Halley and others published Footprints: The Hydrothermal Alteration and Geochemical Dispersion Around Porphyry Copper Deposits

One Hundredth Anniversary Volume

posed by the Committee: this One Hundredth Anniversary Volume, a series of forward-looking Special Papers commissioned for the regular issues of the journal during the centenary period, and a Special Publication to coincide with a meeting in 2006 on the topic of "Wealth Creation in the Minerals Industry."

Porphyry Copper Deposits - cz-eu.eu

Porphyry Copper Deposits. Bozshakol, Porphyry copper deposit - USGS. Comments: Ussoltsev (2011) estimated geological resource of 1,169 Mt of ore at a copper grade of 0.36%, a gold grade of 0.21 g/t, a silver grade of 4.9 g/t and molybdenum and rhenium by-products.

Fault (geology) - Wikipedia

An example of a fault hosting valuable porphyry copper deposits is northern Chile's Domeyko Fault with deposits at Chuquicamata, Collahuasi, El Abra, El Salvador, La Escondida and Potrerillos. Further south in Chile Los Bronces and El Teniente porphyry copper deposit lie each at the intersection of two fault systems. See also

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