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Mineralisation And Ore Zones

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  • Mineralisation And Ore Zones

Subsurface linear structures and potential zones of mineralisation …

Shear zones and other weak zones show continuity even in the obscured areas of Wembere depression and that some faults are intruded by dykes in the same trends, which were not previously identified. Most of the main shear zones are trending WNW-ESE and NW-SE directions. ... This suggests that mineralisation and ore deposits in the study area ...

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Different styles and ore occurrences of barite mineralisation (a-d

Different styles and ore occurrences of barite mineralisation (a-d), and thin (e-g) and polished sections (h and i) of samples rom the Farsesh barites (plane-polarised transmitted and reflected ...

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Gold-and silver-bearing assemblages in the Ann-Mason copper …

The majority of ore mineralisation is centered around the Luhr Hill porphyritic granite (Jpg) and cogenetic granite dyke swarm (Jgp), which are believed to be the source of the mineralising hydrothermal fluid. ... producing textures similar to those seen in the Ccp-Bn mineralisation zone at Ann-Mason (e.g. Li et al., 2020, Li et al., 2018, ...

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Formation of orogenic gold deposits by progressive movement of …

The ore zones consist of east-dipping sets of veins (Fig. 2a) that are hosted by massive metagreywacke of the Timiskaming assemblage and meta-intrusive rocks 32.

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The Dugald River-type, shear zone hosted, Zn-Pb-Ag …

The breccia ore represents the most economic style of mineralisation, highest grade and thicker ore zones, and is particularly abundant in the southern end of the deposit where …

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Review Iron oxide copper-gold (IOCG) deposits – A review (part 1

The Fe oxide deposits and Fe-oxide-rich alteration zones are important features of all of the IOCG provinces in orogenic settings, and variously occur as zones with little or no Cu-Au mineralisation within some IOCG deposits and as Fe-oxide accumulations spatially quite separate from the Cu-Au mineralisation.

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Archaean gold mineralisation in a normal-motion shear zone …

Archaean gold mineralisation in a normal-motion shear zone at Harbour Lights, Leonora, Western Australia & R. Vearncombe Key Centre for Teaching and Research in Strategic Mineral Deposits, Department of Geology, The University of Western Australia, ... a fuchsite schist from the central ore zone. Hangingwall zone The schists of the Hangingwall ...

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(PDF) Mineralization controlled by structures

Nearly all hydrothermal deposits exhibit some degree of structural control on mineralization. Structures (fractures, faults or folds) which form prior to a mineralizing event are referred to as ...

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Major Styles of Mineralization and Hydrothermal Alteration and Related

  • Academia.eduhttps:// › A_classification...

    A classification of mineral systems, overviews of plate …

    Any classification scheme has to take into account that ore deposits are formed by one or more of three fundamental processes, namely: …

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  • The structural controls of gold mineralisation within the Bardoc

    The structural controls of gold mineralisation within the Bardoc Tectonic Zone, Eastern Goldfields Province, Western Australia: implications for gold endowment in shear systems ... strike-slip fault system was generated late in the tectonic history of the greenstone belt and that high-grade ore zones formed late in the strike-slip deformation ...

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    Apatite as a pathfinder to tin mineralisation: prospects and …

    Granite-related mineral deposits are major primary sources of the critical metals tin (Sn) and lithium (Li). The utility of accessory minerals such as zircon and apatite as …

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    Timing of Ore Mineralisation in Deposits of the Baikal-Muya Belt …

    The results of this study and previously published data suggest two stages of ore mineralisation at Transbaikalia: 330–320 Ma for the disseminated mineralisation and 290–270 Ma for the vein mineralisation. ... Ore zones are represented by quartz-pyrite association with scheelite and gold-polysulphide (gold-sphalerite-galenite) association ...

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    Full article: 3D geometry of the Dugald River Shear Zone, Mount …

    Understanding the shear zone's 3D geometry and kinematics allows for predictive modelling of ore lens distribution and identification of dilational zones, which are crucial for …

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    Evolution of the uranium mineralisation in the Zoujiashan deposit

    Mineralisation is mainly distributed in porphyroclastic rhyolite and rhyo-dacite along the NE-SW fault and adjacent fractures. The deposit has four major ore zones, ore zone 4 being the largest one (Fig. 2 C). Ore zones mainly consist of vein clusters and some stratiform ore bodies (Dahlkamp, 2009, Jiang et al., 2006). Veins are of variable ...

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    EPITHERMAL ZONES OF THE PORPHYRY-SKARN …

    Epithermal zones of the porphyry-skarn-epithermal.. Due to the special geodynamic evolution of the region, the ore complex at Recsk is a uniquely preserved portion of the Alpine subduction-related ...

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    Quantified spatial relationships between gold mineralisation and …

    Many recent studies used spatial analysis to explain ore forming processes (Carranza, 2009, Carranza and Hale, ... However, there are also areas where our predictive map is inconsistent with known mineralisation zones, i.e., zones A to E in Fig. 8. Zone A is an elongate, NNW-trending belt that is parallel to the known, highly endowed ...

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    Tin Mineralisation in Nigeria: A Review

    Nigeria is endowed with vast but largely untapped solid mineral resources including tin ores (cassiterite and stannite). Tin, which is one of the oldest metals known to man, is invaluable in a ...

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    Evolution of the uranium mineralisation in the Zoujiashan deposit

    Mineralisation is mainly distributed in porphyroclastic rhyolite and rhyo-dacite along the NE-SW fault and adjacent fractures. The deposit has four major ore zones, ore zone 4 being the largest one (Fig. 2C). Ore zones mainly consist of vein clusters and some stratiform ore bodies (Dahlkamp, 2009; Jiang et al., 2006).

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    Spatial coupling relationship between faults and gold deposits in …

    Many developed countries have adopted 3D visualisation of mineral deposits as an important basis for geological prospecting and research on mineralisation regularity (Goleby et al., 2002, Malehmir et al., 2006).In recent years, China has also made substantial progress in the exploration of the 3D geological structure of mineral deposits and metallogenic zones.

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    Formation of orogenic gold deposits by progressive movement of …

    Orogenic gold deposits are comprised of complex quartz vein arrays that form as a result of fluid flow along transcrustal fault zones in active orogenic belts. Mineral precipitation …

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    Boiling Zones and Precious Metal Mineralisation in …

    Ore bodies are localized in zones of strong paleo-permeability commonly controlled by subvertical extensional structures where very strong fluxes of boiling fluid develop episodically. The mineralogical products of boiling, comprising ore-grade mineralisation, distinct vein textures, and zoned hydrothermal alteration, have been used

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    Porphyry-copper mineralisation in the central Srednogorie zone

    The porphyry-copper systems in the central part of the Srednogorie zone (Bulgaria) are represented by three major deposits (Elatsite, Medet and Assarel) and several smaller deposits and occurrences, all of them within the Panagyurishte ore district. The hydrothermal systems are related to Late Cretaceous calc-alkaline igneous complexes. Ore mineralisation is …

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    Hydrothermal alterations and U-REE mineralisation in the …

    the shear zone had been the locale of profuse hydrothermal alteration and there is general consensus about hydrothermal mineralisation, the alteration types vis-a-vis ore mineralisation are not amply clear. In this paper, we describe ore mineralogy and multiple alteration types vis-a-vis uranium-rare earth element

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    The use of GIS/remote sensing in determining gold potential

    The ratio 5/6 was used for mapping ferrous minerals (e.g. iron ore, manganese, nickel or chromite) due to the high reflectance of those minerals in the band ratio. The area is …

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    Ore Textures and their Implications for Gold Recovery at …

    indicator of gold mineralisation, this research was conducted to determine the ore textural relationship between gold and sulphides and the implication of the ore textures on the current gold recovery methods employed on the deposit. Block (polished) sections were prepared from samples from the ore zones: Transition and Cobra.

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    Alteration and mineralization patterns in orogenic gold deposits

    Orogenic ore fluids are capable of transporting sufficient gold from deep (5 kbar and 600°C) to shallow (1 kbar and 200°C) crustal levels, resulting in alteration and …

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    Gold mineralisation by pyrite recrystallisation and arsenopyrite

    Ore-forming fluids in most hydrothermal gold deposits are in fact Au-undersaturated and contain very low both Au and As contents (1–100 ppb Au, 0.10–100 ppm As; Mikucki, 1998; Goldfarb and Groves, 2015), the refinement processes that can efficiently produce high As–Au contents in arsenian pyrite or arsenopyrite (e.g., Reich et al., 2005, Sung et al., 2009) exert a …

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    The role of zircon in hydrothermal heavy REE mineralisation: The …

    We suspect similar ore genesis processes were responsible for unconformity-related, HREE mineralisation at John Galt, Mount Mansbridge, and Watts Rise-Castella (also known as Killi Killi Hills) Australia; (Fig. 1), and the Maw Zone, Athabasca Basin, Canada (Rabiei et al., 2017), all of which are associated with Archean to Paleoproterozoic ...

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    URANIUM MINERALISATION IN NAMIBIA

    Enriched zones are commonly found on or near contact with country rock xenoliths, and the degree of darkness of the quartz is indicative of the relative uranium content. A feasibility study was completed in 1989, when total resources were estimated at 42.7 million tonnes of ore with an average ... mineralisation, ore grade is most efficiently ...

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    (PDF) Understanding High-grade Mineralization in the …

    The Zone 5 Cu-Ag deposit is the most consistently (for ~4.2 km) mineralized deposit in the Khoemacau district in northwestern Botswana, with an underground mineable resource of ~100 Mt grading ...

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