INTRUSION-RELATED GOLD DEPOSITS

Keywords: El Morado district, Lilianita gold deposit, coastal Cordillera, intrusion-related oxidized vein, fluid inclusions, oxygen isotope compositions. 1. Introduction The north Chilean coastal Cordillera (22°S to 24°S) is a famous province that has many Manto-type and iron oxide–copper–gold (IOCG) vein …

The Association of Gold and Magnetite - Gold, Mining and ...

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 chemical formula Fe 3 O 4 that is often found in contact metamorphosed areas associated with intrusions of magma into carbonate or silico-carbonate rocks the intrusion itself is usually granite or monzonite-syenite.

Jalli Stone Crusher Near Poonamallee

La Brea diorite is the largest volumetric intrusion in the district, and hosts the vein systems discussed in this paper. It is a coarse-grained pyroxene(±hornblende) diorite with accessory magnetite, ilmenite, zircon and apatite. The latest phase of this intrusion is an aplitic to porphyritic quartz diorite to granodiorite that forms

Geology, mineralization, and fluid inclusion ...

Early vein clinopyroxenes are blocky, anhedral crystals up to 0.5 mm in length and are intergrown with minute grains of magnetite, ilmenite and hornblende (Fig. 2b). All clinopyroxene-bearing early veins above the central por- tions of the Middle Zone are in close association with gran-

Mineral Resources of Antarctica (It's only a matter of ...

Kolkata Jalli Stone Crusher Near Poonamallee. Jalli stone crusher near poonamallee innocenttouch minutes of 124th seiaa meeting jalli stone crusher near poonamallee clearance for rough stone gravel quarrying at sf no poromboke pwd tank of nemam village poonamallee the stone crushers in the mangalampart of poonamallee road caves in worldnewsmay 3 2015 jalli stone crusher near

Geology, mineralization, and fluid inclusion ...

K-feldspar–quartz vein-type Au deposits, represented by the Hadamengou super-large Au deposit, are widely developed in the Archean high-grade metamorphic terrane in the western segment of the northern margin of the North China Craton. However, the formation processes of these Au deposits have long been debated, and their genetic relationship with magmatic activity remains unclear.

Geology, mineralization, and fluid inclusion ...

Home Resources Past Meetings INTRUSION RELATED GOLD DEPOSITS: CLASSIFICATION, CHARACTERISTICS AND EXPLORATION INTRUSION RELATED GOLD DEPOSITS: CLASSIFICATION, CHARACTERISTICS AND EXPLORATION Society of Economic Geologists Regional VP Lecturer 2003 Dr. T. Baker Economic Geology Research Unit, School of Earth Sciences, James …

THE MURRAY GOLD DISTRICT, SHOSHONE COUNTY, IDAHO: …

Jun 18, 2014· The association of these veins with the oxidized skarns and magnetite-series intrusion is consistent with the general oxidized, intrusion-related W–Mo–Cu–Au type of deposit, with an affinity to the alkalic (silica-saturated) Cu–Au ± Mo porphyry deposits. The fluid inclusion data show the predominance of magmatic–hydrothermal aqueous ...

Late-Hercynian Intrusion-related gold deposits: an ...

Introduction. Within orogenic domains, fluid circulation associated with magmatism is frequently invoked as being responsible for the development of large hydrothermal and mineralized veins systems (e.g., Bierlein and McKnight, 2005, Eldursi et al., 2009, Jensen and Barton, 2000, Lang and Baker, 2001, Thompson and Newberry, 2000).Thus, while granites are supposed to provide the heat and ...

Hydrothermal clinopyroxenes of the Skaergaard intrusion

Introduction. Within orogenic domains, fluid circulation associated with magmatism is frequently invoked as being responsible for the development of large hydrothermal and mineralized veins systems (e.g., Bierlein and McKnight, 2005, Eldursi et al., 2009, Jensen and Barton, 2000, Lang and Baker, 2001, Thompson and Newberry, 2000).Thus, while granites are supposed to provide the heat and ...

Intrusion-related gold deposits associated with tungsten ...

Steve Garwin, 2002. "The Geologic Setting of Intrusion-Related Hydrothermal Systems near the Batu Hijau Porphyry Copper-Gold Deposit, Sumbawa, Indonesia", Integrated Methods for Discovery: Global Exploration in the Twenty-First Century, Richard J. Goldfarb, Richard L. Nielsen

Petrochemistry of the Reduced, Ilmenite-Series Granitoid ...

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 0.8 to 1.5 g/t Au (e.g. Fort Knox)

Mineral Resources of Antarctica (It's only a matter of ...

Vein network epizonal Au-PM-Bi C-P Far Fanning vein epizonal Au-PM-Bi C-P Wellington Springs intrusion-related (oxidized) stockwork hypozonal Cu-Mo S-D Titov High-sulfidation epith. Au-PM-Bi P-Tr Mt Carlton Epithermal Low-sulfidation vein Au-BM C-P Pajingo Low-sulfidation hotspring Au-As C-P Wirralie Volcanogenic Au-rich VMS pipe Au-BM E-O Highway

Structural control, magmatic-hydrothermal evolution and ...

Hercynian Intrusion-related gold deposits: an integrated model on the Tighza polymetallic dis-trict, central Morocco. ... veins instead of sheeted Au-veins, oxidation state of the magma, and Sr-Nd isotopic data. These ... ilmenite and magnetite series with Sn-W mineralization; (3) a post-deformation emplacement, like ...

Intrusion-Related Gold Systems in North Queensland

Hercynian Intrusion-related gold deposits: an integrated model on the Tighza polymetallic dis-trict, central Morocco. ... veins instead of sheeted Au-veins, oxidation state of the magma, and Sr-Nd isotopic data. These ... ilmenite and magnetite series with Sn-W mineralization; (3) a post-deformation emplacement, like ...

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

Oct 17, 2019· Quartz-magnetite veins cross-cutting Paleogene granitic intrusion on the Barchans Islands, West Antarctica. Photo: O. Mytrokhyn, 2017. The porphyry copper mineralisation forms an elongated belt along the west coast of the northern part of Antarctic Peninsula and its adjacent islands.

Intrusion-related Gold Systems. A brief summary by Bruce ...

Intrusion-Related Gold Systems in North Queensland Gregg Morrison1, ... Mesozonal Vein 68 200 variable variable Ravenswood ... A profound reverse anomaly is ascribed to hydrothermal magnetite in the contact aureole of the mother intrusion pre-ore. The reverse mag epoch (~Ma) is …

Hydrothermal Alteration and Mineralization Zoning in Iron ...

Jun 18, 2014· The association of these veins with the oxidized skarns and magnetite-series intrusion is consistent with the general oxidized, intrusion-related W–Mo–Cu–Au type of deposit, with an affinity to the alkalic (silica-saturated) Cu–Au ± Mo porphyry deposits. The fluid inclusion data show the predominance of magmatic–hydrothermal aqueous ...

Distinguishing intrusion-related from orogenic gold systems

La Brea diorite is the largest volumetric intrusion in the district, and hosts the vein systems discussed in this paper. It is a coarse-grained pyroxene(±hornblende) diorite with accessory magnetite, ilmenite, zircon and apatite. The latest phase of this intrusion is an aplitic to porphyritic quartz diorite to granodiorite that forms

Vein and Greisen Sn-W Deposits - ProExMin - Prospecting ...

Intrusion-Related Gold Systems in North Queensland Gregg Morrison1, ... Mesozonal Vein 68 200 variable variable Ravenswood ... A profound reverse anomaly is ascribed to hydrothermal magnetite in the contact aureole of the mother intrusion pre-ore. The reverse mag epoch (~Ma) is …

Late-Hercynian Intrusion-related gold deposits: an ...

The association of these veins with the oxidized skarns and magnetite-series intrusion is consistent with the general oxidized, intrusion-related W-Mo-Cu-Au type of deposit, with an affinity to the alkalic (silica-saturated) Cu-Au ± Mo porphyry deposits. The fluid inclusion data show the predominance of magmatic-hydrothermal aqueous chloride ...

INTRUSION RELATED GOLD DEPOSITS - SMEDG

Intrusion-related vein gold deposits: Types, tectono-magmatic settings and difficulties of distinction from orogenic gold deposits. Resour. Geol., 48: . Direct Link | 19: Sillitoe, R.H., 2002. Some metallogenic features of gold and copper deposits related to alkaline rocks and consequences for exploration. Mineralium Deposita, 37: 4-13.