• IGNEOUS PETROLOGY OF THE COLOSA GOLD-RICH …

    continuum of porphyry systems from Cu-Au, through Au-Cu, to the Au-rich and Cu-poor counterpart (Sillitoe, 1979; Sillitoe, 2000; Seedorff et al., 2005). Porphyry gold systems are not a very common type of gold deposit. Deposits assigned to this group include a few porphyries in the Chilean Maricunga belt

  • 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.

  • MobileMT forward modeling -PORPHYRY ORE-SYSTEMS-

    porphyry systems models in a broad spectrum of geoelectrical conditions, from resistive (Model 1) to conductive (Model 4). As the theoretical results and practice show, MobileMT airborne EM system is able to recover subsurface geology effectively in the broad range of resistivities and depths from

  • 2.2 Porphyry-epithermal mineral system | Geoscience Australia

    In the porphyry-epithermal mineral system, pathways for fluids and their contained metals, ligands and sulfur include faults, stratigraphic aquifers and crystallising intrusive bodies. Crystallising intrusions are particularly important pathways for high-temperature, proximal deposits such as porphyry Cu-Au-Mo deposits and Cu-rich skarns.

  • Update on Jaxon Mining's Red Springs Project: Focus on ...

    April 16th, 2019, Vancouver, Canada - Jaxon Mining Inc. (TSXV: JAX, FSE: OU31, OTC: JXMNF) ("Jaxon" or the "Company") is pleased to announce the discovery of a large scale copper porphyry system with indications of high grade gold-bearing tourmaline breccia and other sulfide vein mineralization at its 42,244 ha Red Springs project in NW British Columbia.

  • porphyry gold systems - centstrings.nl

    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 ...

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

    1. Introduction. Porphyry copper deposits contain up to 100 t of gold and are among the largest reservoirs of gold in the upper crust (Kerrich et al., 2000).They are commonly surrounded by deposits and country rock containing gold that is thought to have been derived from them (Jones, 1992).Gold can be removed from porphyry copper systems by vapors that separate at high temperatures or by ...

  • Laurentian University Research Program Confirms Tourmaline ...

    The report identifies the quartz tourmaline breccia as being indicative of porphyry systems the Company has delineated at its Red Springs project. The report also identifies other occurrences of tourmaline which have proven to be indicators of porphyry-style mineralization at different locations around the world.

  • Broadway Discovers Porphyry System at Madison – Broadway ...

    Oct 26, 2017· This alteration zoning from propylitic to phyllic is typical of porphyry systems moving toward the typically mineralized core. Photo 1: C17-24 980-988 is the carbonate-latite porphyry contact, note the chaotic folding and brecciation. Photo 2: C17-24 1032.5-1041.4 is a photo of the latite porphyry showing the phyllic alteration.

  • GEOLOGY AND EVOLUTION OF THE COPPER FLAT PORPHYRY SYSTEM ...

    The Copper Flat porphyry copper deposit in the northern part of the Hillsboro district was discovered in 1975 (Castellano et al., 1977; Dunn, 1982, 1984), although alteration and mineralization in the area suggested to earlier geologists that a porphyry copper deposit should …

  • 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.

  • bullmarketrun.com

    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 ...

  • Gold in porphyry copper systems - USGS

    Part or all of this report is presented in Portable Document Format (PDF). For best results viewing and printing PDF documents, it is recommended that you download the documents to your computer and open them with Adobe Reader.

  • SolGold signals another porphyry discovery - Mining Journal

    SOLGOLD has identified a potential new copper porphyry system at its -owned Sharug project at the southern end of the Miocene Belt in Ecuador. ... per tonne gold, but work to the south has ...

  • 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.

  • Porphyry Gold Systems - ludotecahappytime.it

    Gold-rich porphyry systems in the Maricunga Belt, northern . The Maricunga belt is a linear metallogenic unit defined by at least 14 zones of gold and/or silver mineralization between latitudes 26 degrees and 28 degrees S in the Andean Cordillera of northern Chile. Get Price.

  • HYPOGENE ALTERATION AND MINERALIZATION IN THE DOS …

    Hypogene alteration and mineralization in the Dos Pobres porphyry Cu(-Au-Mo) deposit, Safford District, Arizona: A gold- and magnetite-rich variant of Arizona porphyry copper systems.

  • (PDF) Distribution of gold in porphyry copper deposits

    PDF | Analysis of 55 porphyry copper deposits demonstrates a continuum between porphyry copper-gold deposits emplaced at a median depth of 1 km, with a median size of 160 million metric tons of ...

  • (PDF) Porphyry Copper Systems | Daniela Olivares Sedan ...

    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

  • 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 ...

  • Porphyry Gold Systems - date-soft.be

    porphyry gold systems - kansenvooroeganda.nl. PORPHYRY-RELATLD LOW SULFIDATION GOLD SYSTEMS … PORPHYRY-RELATLD LOW SULFIDATION GOLD SYSTEMS 195 Society of Eco~iom~c Geologists Special Publication No. 6, 1998, pp. 137-200 As a continuum of deposit styles, there is a spatial and. Learn More; 2.2 Porphyry-epithermal mineral system | Geoscience ...

  • ArcWest Exploration Inc. Discovers High-Grade Epithermal ...

    The Teeta Creek project is located 23 kilometers south of BHP-Billiton's past producing Island Copper porphyry copper-molybdenum-gold mine, and 40 km south of NorthIsle Copper and Gold Inc.'s advanced-stage North Island porphyry copper-gold project, a portion of which is currently being explored under an earn-in agreement with Freeport McMoRan.

  • GOLIATH CONFIRMS TWO LARGE PORPHYRY SYSTEMS ON …

    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

  • Porphyry Copper Systems* - pyrite.utah.edu

    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 …

  • Porphyry copper deposit - Wikipedia

    For copper-molybdenum porphyry deposits, formation is broadly concentrated in three time periods: Palaeocene-Eocene, Eocene-Oligocene, and middle Miocene-Pliocene. For both porphyry and epithermal gold deposits, they are generally from the time period ranging from the middle Miocene to the Recent period., however notable exceptions are known.

  • VR Expands Bonita Property and Plans for 2019 Exploration ...

    Feb 13, 2019· Commenting on the news today, VR's CEO Dr. Gunning stated: "Four years of exploration at Bonita have unearthed a middle Jurassic porphyry copper-gold system …

  • 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)

  • PPT – Porphyry and Epithermal Systems Sciencedriven ...

    Porphyry and epithermal deposits Porphyry copper-molybdenum and copper-gold deposits are centred on shallow-level porphyry intrusions Grasberg, Indonesia Epithermal gold and silver deposits are typically hosted by volcanic rocks Round Mountain, Nevada 3 Porphyry and epithermal systems the state of play at end of 1960s (1)

  • Relationship Between Porphyry Systems, Crustal ...

    Lukas Zürcher, Jane M. Hammarstrom, John C. Mars, Stephen D. Ludington, Michael L. Zientek, 2016. "Relationship Between Porphyry Systems, Crustal Preservation Levels, and Amount of Exploration in Magmatic Belts of the Central Tethys Region", Tectonics and Metallogeny of the Tethyan Orogenic Belt, Jeremy P. Richards. Download citation file:

  • VR EXPANDS BONITA PROPERTY AND PLANS FOR 2019 …

    unearthed a middle Jurassic porphyry copper-gold system that unifies showings of and gold - copper bearing iron oxide breccia across a hydrothermal alteration footprint nearly 5x7 km's in size. The work this summer at Rattlesnake added another target to the system . The past-producing Yerington camp to the