Intrusion Related Vein Magnetit Depositssits


Intrusion Related Vein Magnetit Depositssits

Intrusion Related Vein Magnetit Depositssits The Company Shanghai GME is the leading provider of equipment, services and integrated solutions in industrial crushing and grinding equipment In the last 20 years we follow the motto "Best Quality, Best Service", Shanghai Gmachine is possessed of an enviable reputation among its customers in over 50 countries spread throughout the world


-intrusion related vein magnetit depositssits-

intrusion related vein magnetit depositssits plant any small scale machine to melt iron ore used portable jaw crusher for magnetite iron ore iron intrusion related vein magnetit depositssits …


intrusion related vein magnetit depositssits

Intrusion related vein magnetit depositssits - Restaurants and Bars intrusion related vein magnetit depositssits Screening & Washing Track Mounted Mobile Crushing Plant Mobile Crushing Plant Complete Crushing Plant Mining Service Online


Intrusion Related Gold Deposits

mineralisation Magnetite contents are low to absent because of relatively low magmatic oxidation states and Fe contents Intrusion-Related Gold Deposit (IRGD) granites generally fall into the field between ilmenite- and magnetite-series granites High SiO2 late stage phases, sub volcanic intrusions …


Intrusion–Related Vein Gold Deposits: Types, Tectono

A spectrum of intrusion-related vein gold deposits is recognized Representative examples are described of the following geochemical associations: Au-Fe oxide–Cu, Au–Cu–Mo–Zn, Au–As–Pb–Zn–Cu, Au–Te–Pb–Zn–Cu and Au–As–Bi–Sb The associated intrusions range from small outcropping stocks to complex batholiths


INTRUSION-RELATED GOLD DEPOSITS - CMI Capital Limited

INTRUSION RELATED GOLD SYSTEMS IN Sn-W PROVINCES (Baker et al, 2005a) Metallogenic Association Region/ Deposit Granite type SiO2 wt % Granitoid Series Alumina saturation Accessory minerals (in addition to zircon & apatite) Sn-W-Bi Cornwall S71-74 Ilmenite peraluminous ilmenite, monazite, andalusite, topaz, fluorite


Intrusion–Related Vein Gold Deposits: Types, Tectono

In contrast, the Au–As–Bi–Sb association, part of a newly recognized class of intrusion‐hosted Au–Bi–W–As deposits, is related to relatively reduced intrusions, spanning the boundary between the magnetite– and ilmenite–series


Intrusion-related Gold Systems A brief summary by Bruce

mineralisation may be related to Ag‐Pb‐Zn 3 Diversity of Deposits – several different styles possible; intrusion and/or country rock hosted – skarns, replacements, disseminations, stockworks and veins: gold mineralisation characterised by wide range of grades ; large tonnages present have a range of 08 to 15 g/t Au (eg Fort Knox)


(PDF) Distinguishing intrusion-related from orogenic gold

Distinguishing intrusion-related from orogenic gold systems Reduced intrusion-related gold deposits have become a new, low-grade, large-tonnage exploration target during the last decade The best recognized examples of such deposits are recognized throughout the Tintina Gold Province of the northern North American Cordillera


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

intrusion Barren high temperature ptygmatic and disjointed A style quartz veins developed while the intrusion is cooling may be overprinted by stock work and linear sheeted Au veins which vary to locally wormy A style quartz-sulphide, or stock work and sheeted M style quartz-magnetite-sulphide veins These veins and lesser


intrusion related vein magnetit depositssits

intrusion related vein magnetit depositssits Intrusion-related gold deposits associated with tungsten-tin provinces - intrusion-related gold deposits, which occur within magmatic provinces best known for intrusion-hosted gold deposits are most commonly of sheeted vein/veinlet type, although


The magnetic signature of Neoarchean alkaline intrusions

An annular signature, corresponding to (1) small meta-aluminous granitic intrusions with a low ferro-magnesian content; gold is both disseminated and within veins associated with a magnetite/hematite halo where, in the Lac Bachelor deposit, gold is related to a late magmatic-hydrothermal event and (2) more mafic intrusions, possibly magnetite


Intrusion-Related Gold Deposits in North Queensland

A profound reverse anomaly is ascribed to hydrothermal magnetite in the contact aureole of the mother intrusion pre-ore The reverse mag epoch (~320-280Ma) is useful thru NQ Open pit intr complex


Geological and Geochemical Characteristics of the

All these results show that the gold deposits in the El Morado district are intrusion-related oxidized veins, which formed from magmatic-hydrothermal fluids at relatively low-pressure shallow conditions, compared to the Cu-rich iron oxide–copper–gold (IOCG) vein deposits in the same province


Intrusion-related gold deposits associated with tungsten

Intrusion-related gold deposits associated with tungsten-tin provinces The deposits are related genetically to felsic domes, stocks or plutons of intermediate oxidation state, both magnetite- and ilmenite-series magmas are represented The intrusion-hosted gold deposits are most commonly of sheeted vein/veinlet type, although greisen-like,


Petrochemistry of the Reduced, Ilmenite-Series Granitoid

Petrochemistry of the Reduced, Ilmenite-Series Granitoid Intrusion Related to the Hired Gold-Tin Prospect (Basiran), Eastern Iran


Mineralogy and origin of the intrusion-related Liikavaara

The Liikavaara Cu-(W-Au) deposit is situated proximal to the Aitik Cu-Au deposit in northern Sweden It shows occurrence of scheelite and enrichment in trace metals including Au, Ag and Bi In this


Proterozoic deposits in Australia and Greenland - govmingl

Proterozoic deposits in Australia and Greenland Leon Bagas1, Jochen Kolb2, Marco Fiorentini1, Bo Møller Stensgaard2 John Owen1 1) Centre for Exploration Targeting, ARC Centre of Excellence for Core to Crust Fluid Systems, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia 2) Department of Petrology and Economic


Carbonatite and Alkaline Intrusi on-Related Rare Earth

Rare earth element bearing minerals are identified in veins or dikes in the groundmass of larger silicate minerals (Warner and Barker, 1989) A variety of REE-bearing minerals are associated with alkaline intrusion-related REE deposits, in part because secondary processes tend …


Is there any case that gold is hosted by magnetite directly?

Popular Answers ( 1) One common type of gold deposit is one where the gold is associated with the mineral magnetite where the gold is formed in skarns of granular magnetite The mineral has a stone formula Fe3O4 that is often found in contact metamorphosed areas associated with intrusions of magma into carbonate or silico-carbonate rocks


CHAPTER 20 GOLD DEPOSIT CLASSIFICATION 21 …

deposits mentioned in this discussion are vein-hosted gold deposits, which include orogenic, intrusion-related, low-sulphidation epithermal and porphyry gold deposits Previously, the first two types of deposit were known as mesothermal gold deposit As


INTRUSION-RELATED, POLYMETALLIC CARBONATE …

minerals Other intrusion-related alteration includes three vein sets and selvages in granodiorite and skarn that are composed of quartz, microcline, sericite, and sulfide minerals Paragenetic relations among magnetite, pyrrhotite, pyrite, and sphalerite in both skarns and replacement deposits indicate local


Vein Mineral Deposits - Mineral Processing & Metallurgy

Metallurgical ContentVeinsJointsFaultsShear Zones and Crush ZonesCause of FracturesDirection of FracturesHow Minerals Deposit in VeinsDepths at which Veins Have been FormedVeins Formed near the SurfaceVeins Formed at Moderate DepthsVeins Formed at High TemperaturesZones of Mineral DepositsDepths at which Ore Bodies may be FormedFissure VeinsSaddle ReefsShear Zones and …


Geochemistry of hydrothermal gold deposits: A review

1 Introduction Ore deposits are the product of crustal evolution in specific areas and at particular stages Hence, a full understanding of the local geological setting is a prerequisite in studying the genesis of ore deposits (Hedenquist and Lowenstern, 1994, Simmons and Brown, 2006, Zhu et al, 2007b, Hou et al, 2008, Baker et al, 2010)


INTRUSION-RELATED, POLYMETALLIC CARBONATE …

minerals Other intrusion-related alteration includes three vein sets and selvages in granodiorite and skarn that are composed of quartz, microcline, sericite, and sulfide minerals Paragenetic relations among magnetite, pyrrhotite, pyrite, and sphalerite in both skarns and replacement deposits indicate local


An intrusion-related gold deposit (IRGD) in the NW of

Highlights Linares is a gold deposit hosted by post-collisional mixed I and S-types granites They are high-K calc-alkaline, peraluminous and moderately oxidised to reduced The ore is related to microfractures and veins, commonly in sheeted vein array Magmatic ± metamorphic, aqueous-carbonic (CO2 ± CH4 > N2 > H2S) ore fluids of low salinity Linares is an intrusion-related gold deposit, a


Intrusion-Related Hydrothermal Mineral Systems | SpringerLink

Abstract Circulation of hydrothermal fluids in the Earth’s crust takes place under various tectonic regimes and geological situations, within which a complex array of transitional conditions can lead to a large number of ore deposit types and mineralisation styles that effectively defy a rigorous classification


Ore deposits related to intermediate to felsic intrusions

• Fluid separation from the degassing magma occurs near the top of the magma column, forming pockets of magmatic- hydrothermal fluid in which comb-quartz layers grow inward from intrusion margins • Mineralized vein and fracture stockworks form when the fluid pressure exceeds lithostatic pressure and tensile strength of the surrounding rocks


Exploration for breccia hosted gold deposits in north east

Exploration for breccia hosted gold deposits in north east Queensland • Breccia related to intrusion of Carboniferous aged rhyolite dykes and plugs 4 Eldridge Pit Surface map both breccia and vein array outside of pipe • Mineralisation age still inconclusive 13 Au


New drilling confirms Intrusion-Related System at Windy Hill

geochemical zonation in both holes, providing strong evidence in support of a buried intrusion-related gold system (Figure 3 and Figure 4) This zonation included strong sulphide mineralisation and a downhole evolution


Intrusion-Related Gold Systems in the New England Fold

proximal and distal to the mineralising intrusion, as illustrated on Figures 1 and 2 These include: • sheeted veins and stockworks; • breccias; • disseminated deposits; • skarns; • replacements; and • distal base metal bearing fissure veins Vertical metal zoning is common and tends to differ from shallow to deeper systems with


Structural control, magmatic-hydrothermal evolution and

First evidence of a Neoproterozoic intrusion-related gold deposit in North-West Africa • Evidence for a progressive and continuous, structurally controlled, vein system formation • Evolving fluid compositions highlighting the magmatic-hydrothermal transition • Migmatized hornfels providing both magmatic and metamorphic fluids


Ages of Intrusion, Alteration, and Mineralization at the

The ages of the equigranular diorite from the Ertsberg intrusion (267 ± 003 Ma), phlogopite from an endoskarn vein in the intrusion (271 ± 004 Ma), and phlogopite from the Ertsberg Cu-Au deposit (259 ± 015 Ma) indicate that intrusion and alteration and/or mineralization at Ertsberg are younger than the intrusions and mineralization in


Sulfidation State of Fluids in Active and Extinct

porphyry-related base-metal veins, and epithermal gold-silver deposits magnetite field, consistent with the view that porphyry copper assemblages precipitate from of stone and physical states that are commonly relegated to changing time in intrusion-centered ore deposits 3 Introduction


Intrusion-Related Gold Systems of north Queensland

IRGS NQ The INTRUSION-RELATED CLAN Intrusion-Related Gold Deposit (IRGD) A deposit spatially and temporally related to an intrusion where Au (Ag) is the only commodity Intrusion-Related Gold System (IRGS) The area of intrusions and hydrothermal features (alteration, breccias, mineralisation) that may enclose a deposit Intrusion-Related Mineral


Magmatic hydrothermal or forming processes- Lode gold

Deposit types (intrusion-hosted, contact, pluton-proximal, pluton-distal Zonation of metals around the pluton Au-Bi-Te association Associated plutons were small and evidence that they were geneticallly related to the mineralization Plutons are felsic, reduced (lack magnetite), pyrrhotite is …


Carbonatite - Wikipedia

Carbonatite (/ k ɑːr ˈ b ɒ n ə t aɪ t /) is a type of intrusive or extrusive igneous rock defined by mineralogic composition consisting of greater than 50% carbonate minerals Carbonatites may be confused with marble and may require geochemical verification Carbonatites usually occur as small plugs within zoned alkalic intrusive complexes, or as dikes, sills, breccias, and veins


Intrusion sequence, vein evolution and timing of

The earliest intrusion (Eep-1) contains the highest Cu and Au grades; the metal content decreases systematically from oldest to youngest porphyry phases Each porphyry intrusion developed a similar sequence of veins: (1) biotite, (2) early dark micaceous halos (EDM), and (3) A-type quartz-K feldspar-anhydrite veins (A1 to A5) In each