Porphyry Gold Systems

PORPHYRY DEPOSITS Earth science

Radial fracture zones outside the pyrite halo may contain lead-zinc veins with gold and silver values. THEORY The spectrum of characteristics of a porphyry copper deposit reflects the various influences of four main and many transient stages in the evolution of the porphyry hydrothermal system .

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2.2 Porphyry-epithermal mineral system Geoscience Australia

Of the critical commodities considered in this review, Mo is economically the most significant in the porphyry-epithermal mineral system and is a common by-product of porphyry Cu-Au-Mo deposits globally. Although Mo is not recovered (or reported) from porphyry Cu-Au deposits of the Macquarie arc, the Spinifex Ridge deposit contains a JORC

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Anatomy of Porphyry-Related Mineralised Au-Cu-Ag-Mo Systems

systems have allowed us to apply time to porphyry systems and better understand their staged evolution as well as the evolved hydrothermal fluids which participate in low sulphidation epithermal vein formation (figure 3). Porphyry Au-Cu-Mo Although porphyry Au-Cu-Mo deposits display considerable variation, some broad generalisations are possible.

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Porphyry (geology) Wikipedia

Porphyry is a textural term for an igneous rock consisting of large-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate rich, generally aphanitic matrix or groundmass.The larger crystals are called phenocrysts.In its non-geologic, traditional use, the term porphyry refers to the purple-red form of this stone, valued for its appearance.

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Preliminary Model of Porphyry Copper Deposits

In their worldwide database of porphyry copper deposits, Singer and others (2008) tabulated known or inferred ages for each tabulated deposit. Relations to Structures It is generally accepted that porphyry copper deposits are structurally controlled, but opinions vary as to the relative impor-tance of regional compared to local fault systems

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A porphyry Cu-Au model exploration implications

• Porphyry Cu-Au mineralisation deposited separate phase to Mo mineralisation. Mo appears to be immobile and a good indicator of system margins. • Later Au associated with quartz-carb-base metal veins produced by mixing with bi-carbonate waters • Actinolite is a good indicator to proximity to chalcopyrite mineralisation

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Descriptive model of Porphyry Au USGS

ORE CONTROLS/EXPLORATION GUIDES: Zoning of near surface hot-spring Hg-S deposits to zones of vuggy silica and advanced argillic alteration at depth hosting gold and/or silver quartz-chalcedony veins may indicate presence of porphyry gold system at depth of 0.5-1.0 km below paleosurface. Zoning may have a lateral component of 1-3 km. Ore bodies

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Porphyry Copper-Gold and Epithermal Gold-Silver Systems

2015-09-10· Porphyry Copper-Gold and Epithermal Gold-Silver Systems; Porphyry Copper-Gold and Epithermal Gold-Silver Systems. Featured Projects View all Projects . Gold Pathways in El Indio Belt El Indio Belt, Chile Argentina. This three year research project in being funded by Barrick in order to define the translithospheric architecture and geodynamic evolut Learn more. TEAM LEADERS. Stephen M

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Porphyry Deposits 101 Doubleview Capital Corp.

Porphyry copper-gold deposits form in a variety of volcanic environments, most commonly in continental margins and intra-oceanic arcs. These are large scale magmatic-hydrothermal systems associated with a series of porphyritic intrusions, which result in extensive alteration footprints that we map and model to target high grade copper-gold mineralization.

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Evolution of Porphyry-Epithermal Gold Systems Using Trace

Evolution of Porphyry-Epithermal Gold Systems Using Trace Elements: Insights from the Iron Cap Deposit, Kerr-Sulphurets-Mitchell District, Northwestern British Columbia (NTS 104B) H.C. Graham, School of Earth and Environment, University of Leeds, Leeds, United Kingdom, [email protected]

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GOLIATH CONFIRMS TWO LARGE PORPHYRY SYSTEMS ON ITS

o Multiple lines of evidence confirm the presence of porphyry systems on Lucky Strike: 1. Prolific coarse gold in placer creeks draining extensive area containing widespread porphyry related polymetallic veins; 2. Soil geochemistry defined a 2000 x 400 metre Au-Cu-Mo-Bi-Sb soil anomaly that

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Porphyry Copper Systems*

Introduction PORPHYRY Cu systems are defined as large volumes (10−>100 km3) of hydrothermally altered rock centered on porphyry Cu stocks that may also contain skarn, carbonate-replacement, sediment-hosted, and high- and intermediate-sulfidation epi

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See Sillitoe, 2010, Porphyry Systems (EconomicGeology

The gold byproduct of porphyry Cu deposits, as well as gold in epithermal deposits (high and intermediate sulfidation) in these intrusion-centered systems (see Sillitoe, 2010, Porphyry Systems

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Broadway Discovers Porphyry System at Madison Broadway

2017-10-26· Broadway Discovers Porphyry System at Madison 10/26/2017 Vancouver, BC October 26, 2017 Broadway Gold Mining Ltd. (TSX VENTURE: BRD) (OTCQB: BDWYF) (“Broadway” or the “Company”) today announced the discovery of a new latite porphyry zone of mineralization at its 100%-owned Madison project in the legendary Butte-Anaconda mining region of Montana, USA.

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Gold-rich porphyry systems in the Maricunga Belt, northern

Reconstruction of the porphyry systems suggests that gold-bearing quartz stockworks were generated 600 to 1,000 m beneath paleosurfaces.Gold-rich porphyry mineralization in the Maricunga belt is closely comparable to that in the Philippines because of the association with dioritic to quartz dioritic porphyry stocks intruded into andesitic

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(PDF) Paleoproterozoic porphyry-related Cu-Mo and Au-base

PDF On May 20, 2018, José Henrique Matos and others published Paleoproterozoic porphyry-related Cu-Mo and Au-base metal systems of the Alta Floresta Gold Province, southern Amazon Craton, Brazil

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Alkaline-Related Gold Systems: An Overview Seeking Alpha

2019-07-15· Some alkaline epithermal gold deposits found in the shallow levels may just be the tip of an iceberg so to speak, because there may exist much larger, alkaline porphyry gold systems

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Geology of Porphyry Copper Deposits

When it comes to porphyry deposits there are a number of variations on a theme and the deposits can be copper only, they can be copper gold, copper molybdenum or molybdenum only but regardless of the metal mix the process of deposit formation is the same.

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Porphyry Copper Systems* GeoScienceWorld

Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and sediment-hosted Au deposits in increasingly peripheral locations; and superjacent high- and intermediate-sulfidation epithermal deposits.

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PPT Porphyry and Epithermal Systems -Science-driven

Porphyry and epithermal systems the state of play at end of 1960s (2) Ages of copper and gold belts and provinces poorly defined (isotopic dating in its infancy) Zoning patterns of hydrothermal alteration in porphyry and epithermal deposits poorly appreciated ; Porphyry gold and gold-rich porphyry copper deposits undefined (notwithstanding Panguna)

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Epithermal Gold Deposits Characteristics

A fascinating group and characteristic of Epithermal gold deposits is that you can virtually see them forming today, simply by visiting hot springs. Like those with Yellowstone in Wyoming or Rotorua in New Zealand. This photo is Pamukkale, low sulfidation hot springs in Turkey, with a beautiful white centre terraces. If you like hot springs, you’ll love epithermal.

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Liberty Gold TV Tower

The Valley Porphyry is the most recent discovery at TV Tower and the third porphyry system identified by our team. The discovery was made through systematic and rapid exploration from initial concept to discovery in six months. Comprehensive soil sampling defined a 1,400 metre by 400 metre, northwest-trending copper and gold-in-soil anomaly

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What Investors Need to Know About Porphyry Copper Deposits

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

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Gold Porphyry System Discovered at Kremice Project in Serbia

Gold Porphyry System Discovered at Kremice Project in Serbia. Vancouver, British Columbia--(Newsfile Corp. October 9, 2019) Tethyan Resource Corp. (TSXV: TETH) ("Tethyan" or the "Company") is pleased to report the discovery of an outcropping gold porphyry system on the western side of the Kremice project, southwestern Serbia (Figures 1 and 2).). Kremice is located 10 kilometres to the

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bullmarketrun

understanding Of porphyry copper systems are then briefly reviewed as a prelude to the currently preferred genetic model for gold-rich porphyry deposits. Methods used in ex- ploration and discovery of gold-rich porphyry deposits are then discussed, With special attention paid to the relatively minor role played by descriptive and genetic models

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A Prospector’s Guide to Alteration and Epithermal Gold

deeply eroded areas, porphyry copper related mineralization may also be present (Figure 1). High-sulphidation and low-sulphidation systems display some similar styles of mineralization and alteration, but the two systems can be separated based on the presence of several key ore minerals along with the

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Intrusion-related Gold Systems. A brief summary by Bruce

progression of classification of gold deposits related to magmatic rocks as commencing with the term porphyry gold deposits (after the usage of porphyry copper deposits) in 1992 by Hollister. This ignores the fact that Sillitoe (1979) had earlier introduced the concept of a porphyry gold deposit style. The next variation in the classification

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GT Gold Corp.

Located up a gentle valley just 10 kilometres off highway 37, the discovery area combines 1) shallow bulk-tonnage-style gold at surface and, just below, deep high-grade underground-style gold at Saddle South, with 2) a massive new gold-rich Cu-Au-Ag porphyry system right next door, reminiscent of Red Chris. The discovery is unfolding now. Join us

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