the ventersdorp contact reef model in the kloof gold mine as

The - University of Texas at Austin

Two post-symposium excursions examined 1) the Witwatersrand and Ventersdorp supergroups, and Kimberley diamond district for five days, and 2) Karoo flood basalts in Kruger National Park for three days. Highlights of the trips included inspecting the Merensky Reef and the Dwars River chromitite lay~rs

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K-Ar dating of white micas from the Ventersdorp Contact Reef of the ...

The K-Ar ages obtained here for the white mica fractions of the Ventersdorp Contact Reef in the Witwatersrand Basin confirm that the period between 2.0 and 1.9 Ga was significant, as far as alteration, and possibly also gold mobilization, was concerned. ... Kloof Gold Mine. S Afr J Geol 97: 297-307 ... Chronological framework for the ...

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Kloof-Driefontein Complex (KDC) - Gold Fields

KDC exploits three primary reefs, namely the Ventersdorp Contact Reef (VCR) located at the top of the Central Rand Group, the Carbon Leader Reef (CL) near the base of the Group and the Middelvlei Reef (MR), which stratigraphically occurs some 50 to 75 metres above the CL.

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Volume 98 Issue 4 | South African Journal of Geology - GeoScienceWorld

Aspects of bedding-parallel faulting associated with the Ventersdorp contact reef on the Kloof gold mine. J. W. Berlenbach. View article. Add to Citation Manager. ... Whole-rock/mineral O-isotope fractionations as a tool to model fluid-rock interaction in deep seated shear zones of the southern marginal zone of the Limpopo Belt, South Africa ...

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Integrated interpretation of 3D seismic data to enhance the ... - Earthdoc

Three‐dimensional seismic data reveal that faults with throws greater than 25 m that offset the Carbon Leader Reef can clearly be seen. Faults with throws less than 25 m but greater than 2‐m throw were identified through horizon‐based attribute analysis, while most dykes and sills with thickness less than 25 m were invisible.

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Desulfotomaculum and Methanobacterium spp. dominate a 4- to 5-kilometer ...

The outlet (2.716 kmbls) was located within the Ventersdorp supergroup; the VCR was intersected at 400 m (3.058 kmbls), and the Carbon Leader reef was intersected at 720 m (3.340 kmbls). In the corresponding core, faults were recorded within the VCR, at 650 and 670 m (3.28 and 3.30 kmbls).

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Who We Are - Brima Logistics

From humble beginnings Brima is pushing towards a strong future. Brima Logistics was established in 2005 on the vision of Tshepo Mokholo, founder and owner. The founding vision was, and continues to be, to offer customers a broad spectrum of logistics services that will honour the principles of excellence, efficiency and productivity.

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A Study of The Behaviour of The' Rock Mass Surrounding the Ventersdorp ...

longwall at Kloof Gold Mine. The strategies adopted to study the rock mass behaviour included laboratory testing of rock samples, convergence and extensometer monitoring, mapping of mining induced stress fractures and geological features, and the use of a conceptual model to investigate the mechanisms which could be responsible for the

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Myths, Legends & Old-folks' stories - capeinfo

The Witwatersrand Super Group of gold-rich sedimentary rock derives its name from the Ridge, originally called Wit Watters Rant, where the Main Reef of gold bearing quartzite was discovered in 1886. A discovery of gold was made at Magaliesburg on the farms Zuikerboschfontein and Blaaubank in 1874, which proved disappointing, but was later shown ...

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Reprocessing of legacy seismic data for gold exploration ... - Earthdoc

The purpose of the study is to improve the imaging of the gold orebody known as the Ventersdorp Contact Reef (VCR), which is mined at the Kloof Gold Mine. The VCR occurs at an interface between the Ventersdorp Supergroup and Central Rand Group with contrasting densities and seismic velocities, which makes it a good target for the seismic methods.

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definition of flat tabular reef in gold mining - github

—The act of excavating ore by means of horizontal, vertical, or inclined workings in veins or large irregular bodies of ore, or by rooms in flat tabular deposits, and also the mining of ore by caving methods. It covers the breaking and removal of ore from underground openings except those driven for exploration and development.

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GOLD FIELDS LTD - GFI Annual and Transition Report (foreign private ...

• a 100% interest in Kloof Gold Mining Company Limited, or Kloof, which ... and the Ventersdorp Contact Reef, or VCR, occur at depths between 500 meters and 3,400 meters. The Middelvlei Reef is the third reef and is a minor contributor to reserves and production. ... A five year agreement with GBF commenced in April 2004, and it operates ...

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Mark Gibson - Chief Operating Officer - Ivanhoe Electric | LinkedIn

3D seismic reflection data acquired for Kloof and South Deep mines forms an integral part of their Ventersdorp Contact Reef mine planning and development programme. The recent advances in 3D...

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The state-of-the-art in 3D orebody modelling: a case study of KDC East ...

The geologically complex Kloof-Driefontein Complex (KDC) East of South Africa hosts one of the richest gold orebodies in the Witwatersrand Basin, the Ventersdorp Contact Reef (VCR, ~1.5 m in thickness). The complex geometry of the VCR, the increase in mining depth, and inherit structural complexity of the

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Libanon Gold Mine In Gauteng, South Africa | The Diggings™

The Libanon Gold Mine is in Gauteng, South Africa. The site was first discovered in 1930. The Libanon Gold Mine is a underground mining operation. Initial production took place in 1949. Mine operations consist of 2 distinct underground workings. There are a total of 7 shafts. Subsurface depth reaches a maximum of 2,200 meters (7,218 feet).

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86Kr excess and other noble gases identify a billion-year-old ...

Cornell DH, Meintjes PG, Van der Westhuizen WA, Kristoffersen M, Frei D. Dating detrital zircon from the gold-bearing Ventersdorp Contact Reef in the Ventersdorp Supergroup of South Africa. Precambrian Res. 2021; 357 :106131. doi: 10.1016/j.precamres.2021.106131.

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86Kr excess and other noble gases identify a billion-year-old ... - Nature

Zhao, B. et al. K-Ar dating of white micas from the Ventersdorp Contact Reef of the Witwatersrand Basin, South Africa: Timing of post-depositional alteration. Mineral. Petrol. 66, 149-170 (1999).

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Operational review | Sustainability | Annual reports 2013 | Sibanye Gold

Gold mining commenced at Beatrix in 1985 and at Oryx in 1993. ... the Carbon Leader Reef (Carbon Leader), the Ventersdorp Contact Reef (VCR) and the Middelvlei Reef (MVR), which occur at depths of between 500m and 4,000m. ... The MVR is classified as Kloof's secondary reef and further minor production volumes are delivered from the Kloof Reef ...

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Browsing Theses and Dissertations (Geology) by Title

An assessment of the economic viability of mining the UG2 Reef within the no.12 Shaft lease area, Impala Platinum Limited. Balakrishna, Manivasan (University of Pretoria, 2008-07-08) The Impala Platinum Mines are located in the western limb of the Bushveld Complex. The economic platinum mineralization which is currently being mined at Impala ...

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Underground mining: 69 Research Articles - daneshyari

The Ventersdorp Contact Reef model in the Kloof Gold Mine as derived from 3D seismics, geological mapping and exploration borehole datasets Fulltext Access17 Pages2014 Legal aspects related to the effect of underground mining close to the site entered into the list of potential Natura 2000 network areas Fulltext Access8 Pages2014

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South deep gold mine south africa - cvcwrh.easytt.fr

The deepest gold mine in the world is Mponeng, a 2.5-mile hole in the ground in South Africa . A whole underground city — lightless and lawless — lives inside the mine . Journalist Matthew Hart. a like her aftermath video; nantucket beadboard; bash escape newline; y2k avatar creator; vscode ruby solargraph; fifa 22 mobile xyz ...

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South Deep Gold Mine - Wikimapia

The discovery of the payable Ventersdorp contact reef (VCR) and Upper Elsburg conglomerates in the early 1950s, in the southern part of the goldfields, led to the establishment of the Elsburg Gold Mining Company in 1965, which was later consolidated to form Western Areas gold mine.

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Charles Mendelow & Associates Inc | Defective Products, in Orchards

Charles Mendelow & Associates Inc Contact Details No. 46,Oaklands Road,Orchards,Johannesburg,Orchards,City of Johannesburg Metropolitan Municipality,Gauteng - 825741777

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ujcontent.uj.ac.za

OPSCM1ING Die Witp:>ortjieverskuiwing kom as 'nprominente afskuiwing voor wat die oostelike grens van die Venterspost-, Libanon- en Kloof goudmyne van die wes-Witslynvorm, In di

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Tesi: "Witwatersrand" - Grafiati

The identified variation is discussed in terms of depositional and post-depositional processes, and it is shown that there appear to be two populations of gold within the Ventersdorp Contact Reef (VCR), i.e. one alluvial and the other hydrothermal.

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Sibanye Stillwater Limited

Shaft (Ventersdorp Contact Reef (VCR) and secondary reefs additions), at Kloof No. 4 Shaft, and also at Driefontein No. 4 Shaft (decreases due a change in pillar design), which sum to an additional 0.2Moz.

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New approach for the digital reconstruction of complex mine faults and ...

this methodology for the digital reconstruction of complex fault structures comprises the following four aspects: (1) collection and fidelity of multi-physical field data of the fault structures, (2) the transmission of multi-physical field data, (3) the normalization of multi-physical field data, and (4) digital model reconstruction of fault .

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South deep gold mine south africa - vjol.overbrookgarage.fr

New documentary explores South Africa mine shootings. In this photo taken Thursday, Feb. 20, 2014, a miner is photographed underground during a journalist's tour to the South Deep gold mine south of Johannesburg. Miners work some 2.4 kilometers (1.5 miles) underground in 12-hour shifts, where safety is a constant concern and everyone depends on.

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Investigating the dynamic-load demand on support ... - ScienceDirect

The Ventersdorp Contact Reef model in the Kloof Gold Mine as derived from 3D seismics, geological mapping and exploration borehole datasets. International Journal of Rock Mechanics and Mining Sciences, Volume 66, 2014, pp. 97-113. Show abstract. A model of the Ventersdorp Contact Reef (VCR) orebody at Kloof Gold Mine was derived by integrating ...

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Interpretation of the Western Ultra Deep Levels 3-D seismic survey ...

The Ventersdorp Contact Reef model in the Kloof Gold Mine as derived from 3D seismics, geological mapping and exploration borehole datasets. ... Neoarchaean tectonic history of the Witwatersrand Basin and Ventersdorp Supergroup: New constraints from high-resolution 3D seismic reflection data. Tectonophysics, Vol. 590.

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Improved structural interpretation of legacy 3D seismic data ... - Earthdoc

The Ventersdorp Contact Reef model in the Kloof Gold Mine as derived from 3D seismics, geological mapping and exploration borehole datasets. ... BrovkoO. and DurrheimR.J. 2018. 3D seismic attributes for structural mapping and enhancement of deep gold mining: a case study from the West Wits Line goldfields, South Africa. Exploration Geophysics ...

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Carletonville Herald 13 Februarie 2014 by Carletonvilleherald -

Carletonville Herald 13 Februarie 2014. 14 Februarie 2014 Prys: R4.10 Weekliks meer as 23 400 lesers. 'We want to learn, not stay away'. No bail for alleged drug man. Sparks fly over 3 injured ...

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Kloof-Driefontein Complex (KDC) Technical Short Form Report 31 December ...

Kloof Gold Mine (KDC East) and Driefontein Gold Mine (KDC West) have new order mining rights in respect of the mining area totalling 28,648 hectares. ... Ventersdorp Contact Reef The bottom band is most exclusively the economic horizon of In addition to the many economically viable reefs found in the the MR, ranging from a single pebble lag to ...

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Beneficiation of Witwatersrand Type Gold Ores by Means of Optical Sorting

particular to recover misplaced reef from surface waste rock dumps. This research comprises two case studies to prove the effectiveness and viability of optical sorting of Witwatersrand type conglomerate ores. The first case study deals with recovering gold reef from surface rock dumps (SRD) at Kloof Gold Mine.

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A cratonic foreland model for Witwatersrand Basin development in a ...

Corpus ID: 130813357; A cratonic foreland model for Witwatersrand Basin development in a continental back-arc, plate-tectonic setting @article{Winter1987ACF, title={A cratonic foreland model for Witwatersrand Basin development in a continental back-arc, plate-tectonic setting}, author={H. de la R. Winter}, journal={South African Journal of Geology}, year={1987}, volume={90}, pages={409-427} }

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Sibanye Southern Africa EXCO 26 July 2017 - AMMSA

Ventersdorp contact reef (VCR). 2. Mining depth 3000m - 3500m (deepening extension to 3750m). 3. Various facies (apple green, milky cobble, sandy 1 and sandy 2), resulting ... • For this model the ƒ was down graded to 0,4 ... The acceptable RCF for tunnels at Kloof gold mine, Ikamva shaft is 1,7. Modelling results

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Ant Tracking Manzi Et Al 2013 GEOPHYSICS - Scribd

It forms the footwall to the gold-bearing Ventersdorp Contact Reef (VCR ~ 1.5 m thick) and can be best described as an east-dipping, divergent clastic wedge that hosts a low acoustic-impedance package of stacked gold-bearing reefs (Fig. 4), the richest being the EC at the base of UER.

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The Ventersdorp Contact Reef model in the Kloof Gold Mine as derived ...

The (basal) auriferous conglomeratic lithofacies of the VCF is referred to as the Ventersdorp Contact Reef (VCR) and is dated at 2729±19 Ma (discordant U-Pb SHRIMP ages) from igneous-detrital xenotime/zircon aggregate [32]. The Kloof Gold Mine is situated on the eastern limb of the first order crustal-scale Libanon Anticline [18].

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Refining the methodology for geological zoning used in resource ...

Ventersdorp Contact Reef (VCR) and the processes followed to ascertain whether the depositional process of the reef has control over the spatial distribution of the gold value at Kloof Gold Mine and finally concluded that this does have bearing on the gold mineralisation. 1.1 Research Background

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The Relationship between ERR and seismic energy release for different ...

We report here on a re-analysis of previous work on the relationship between ERR and seismicity. Data from four mines spanning the Ventersdorp Contact, Carbon Leader and Vaal Reefs were analysed using the MINF suite of programs (e.g. Spottiswoode, 1999). For each area considered, seismicity was compared to energy release (ERR times area

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