timeball hill goldmine

CHAPTER 2 THE GEOLOGY OF THE UITKOMST COMPLEX AND …

the gold is distributed erratically (Ward and Wilson, 1998). The vein is situated in the Timeball Hill shales that form part of the Pretoria Group and immediately overlies the Uitkomst Complex (Ward and Wilson, 1998). The flat reefs or bedding-parallel veins have

ECONOMIC GEOLOGY RESEARCH UNIT - 99mines.com

Gold Mine shows that gold deposition occurred in two stages, both linked to bedding-parallel thrusting within the sedimentary pile. The majority of gold was introduced in the second stage of mineralisation. New data on post-reef thrust deformation is presented. ... Timeball Hill Fm Rooihoogte Fm

Overview of the Olifants Catchment - AWARD

of gold and other minerals in the greenstone lavas. Overview of the Olifants Catchment |4 Figure 1: Map of the major geological systems of the Olifants catchment ... (Timeball Hill, Daspoort and Magalies) with intervening shales and lavas. It forms the mountains of Sekhukhuneland (eastern

Dating the rise of atmospheric oxygen | Nature

The Rooihoogte Formation and the conformably overlying Timeball Hill Formation of the Pretoria Group, South Africa (Figs 1 and 2 24. Several lines of …

Stream sediment geochemistry of the Olifants catchment ...

The Blyde catchment drains the rocks of the Timeball Hill Formation of the Transvaal Supergroup. Area-A has elevated metals of Al-Fe-Mn-Ti-As-Cu-Ni-V-Zn-Pb-Co-U. Many of the gold mines are hosted in Malmani dolomites, and to a lesser extent in the Timeball …

(PDF) Primitive Os and 2316 Ma age for marine shale ...

Runs LL-1 and LL-7 for Timeball Hill core (EBA-2, drilled by Gold Fields; Fig. 1) in highly sample EBA-2/30 represent two separate dissolutions carbonaceous shales spanning the boundary between of the same mineral separate. The isochron age, 48 J.L. Hannah et al. / Earth and Planetary Science Letters 225 (2004) 43–52 Table 1 Re–Os isotopic ...

timeball photos on Flickr | Flickr

A short tunnel was cut through the hill beyond the railway station in 1875 to allow trains to travel to South Geelong and on to Colac. By the mid-1850s Geelong was the third biggest town in the Australian colonies and a well-established city and it continued to greatly significantly in the 1860s.

A reassessment of the structure of the dolomite inliers ...

Timeball Hill Formation, which has 150 to 200m of poorly exposed shale and siltstone at the base. This shale unit grades upwards into a zone containing three continuous quartzites and a lower discontinuous quartzite interbedded with siltstones; the lower two are white, …

Controls to hydrothermal gold mineralization in the ...

The Timeball Hill shales therefore do not appear to be a better protore for gold than any other shale. Thus if there is a lithogeochemical control to the mineralization, it must be as a favoured depositional environment rather than as a source of Au.

Iron formations A global record of Neoarchaean to ...

2.32 Ga oolitic GIF of the Timeball Hill Formation in South Africa, are composed of concentric cortices of hematite (Dorland, 1999) that were likely precipitated where Fe(II)-rich waters met more oxygenated shallow seawater. The granules are either grain- or cement-supported; in the case of the latter, it appears that the cement precipitated early,

Geochemical characterization of karst groundwater in the ...

ridge underlain by the quartzite of the Timeball Hill for-mation (Pretoria group). The south-eastern boundary transects the western part of the granitic Johannesburg dome and neighbouring ridges of gold-bearing Witwaters-rand formations, forming the faulted rim of the Witwatersrand basin. Towards the west of the Johannesburg

Dating deposition and low-grade metamorphism by in situ U ...

Rasmussen, Birger and Fletcher, Ian R. and Muhling, Janet R. 2013. Dating deposition and low-grade metamorphism by in situ U-Pb geochronology of titanite in the Paleoproterozoic Timeball Hill Formation, southern Africa. Chemical Geology. 351: pp. 29-39.

Aerobic bacterial pyrite oxidation and acid rock drainage ...

Data representing the lower end of mean Cr/Fe values reported for the Timeball Hill iron formation (197 p.p.m. Cr, 47 wt% Fe, molar Cr/Fe of 0.00046; ref. …

DARTFORD TO ROCHESTER – TIMEBALL AND TELEGRAPH TRAIL…

Timeball and Telegraph Trail Part 2 (Dartford to Rochester), a social walk organised by the Kent group of the LDWA - Sunday 17 February 2019. Part 1 (Greenwich to Dartford) can be read here. A linear route mainly on footpaths, tracks and field …

Enhanced geological modelling of the Upper Elsburg reefs ...

South Deep Gold Mine, owned by Gold Fields Ltd., is situated near Westonaria in the Gauteng Province of South Africa and mines the ... quartzite and interbedded shale of the Timeball Hill Formation. These sediments are best exposed on the east-trending ridges that dominate the northern portion of the

The Bushy bend lavas, a new volcanic member of the ...

Rooihoogte and succeeding Timeball Hill Formations of the Pretoria Group. Due to a widespread association of the basal black shales of the latter formation with tuffaceous lithologies, the Bushy Bend lavas are assigned to this unit. The lavas comprise massive and amygdaloidal flows and subordinate porphyritic rocks.

Culture & Heritage Visit Hobsons Bay

Culture & Heritage. Hobsons Bay's rich history is visible across the city. Experience a slice of the first settlement in the seaside town of Williamstown with Victorian era pubs throughout Nelson Place, maritime museums and the Cannons in John Morley Reserve. Originally known as Edom, Spotswood was established itself as a hub for ...

Historic timeball brought up to the Guildhall in Hull as ...

Historic timeball brought up to the Guildhall in Hull as part of a £ 452,000 makeover. By Cynthia D. Caldwell. ... were finished with 23.5 karat English gold leaf. The restoration is part of the Yorkshire Maritime City project. ... Including the famous Time Balls in Greenwich and at Nelson's Monument on Calton Hill, Edinburgh, there are ...

Magaliesburg Gold Mining | Prospectors are back with ...

Cold Gold Trading is in the process of lodging an application for prospecting rights Gold and Silver on portion 12, 13, 21 and 22 of Golden Valley 621 farm with the Department of Mineral Resources Gauteng. This is the low quality document we received which you can peruse. Name: MmuBua Minerals (acting on behalf of Cold Gold Trading) Tel: 079 ...

gold mines in magaliesburg

Geology. The gold bearing quartz veins are interbedded within Timeball Hill shales. Description. Blaauwbank Historic Gold Mine is called the oldest Gold Mine in Gauteng as it was established as early as 1874. The early years are not very well documented …

Sequence stratigraphy of the Precambrian Rooihoogte ...

Pretoria Group, that is, the Rooihoogte and Timeball Hill (Fig. 3). A generalized lithostratigraphic profile for the Rooihoogte and Timeball Hill formations is presented in Fig. 4. The basal contact of the Rooihoogte Formation, as well as the top contact of the Timeball Hill Formation, are both marked by major angular unconformities.

Controls to hydrothermal gold mineralization in the ...

The deposits of the Witwatersberg Goldfield are also preferentially located in the Klapperkop Quartzite Member and overlying shales of the Timeball Hill Formation, Transvaal Supergroup. The rocks do not appear to form a particularly favourable protore but rather represent a favourable depositional site.

A review of the sequential grid mining method employed at ...

shales belonging to the Timeball Hill Formation, which forms the west-south-westerly trending range of hills known as the Westwitsrante. A diabase sill is present near the base of the quartzites. Andesitic lavas belonging to the Hekpoort Formation cover the southern part of the Elandsrand mining lease area. The Malmani Subgroup Dolomites, the ...

Correlation of Paleoproterozoic glaciations based on U–Pb ...

The Timeball Hill Formation comprises two upward coarsening sequences: the lower unit grades from carbonaceous shale and siltstone into sandstone and oolitic ironstone marking the sequence boundary, whereas the upper unit passes from shale and siltstone into glacial diamictite and conglomerate (Coetzee, 2001, Coetzee et al., 2006, Eriksson et ...

Environment South Africa | Green Blog | Eco Bulletin

Timeball Hill Location Phases Geology Gold Reserves Valuation DME (Department of Minerals and Energy) Licenses Descri tion The mining prospecting rights held by M.J. Cornelius of Elma Mining Consultants ximatel 400 hectares of 'vatel owned land. cc on Province, RSA Four areas of adoin. oximatel 400 Ha maki u Epigenetic Gold deposits.

Blyde River und Umgebung (Süd-Afrika)

Transvaal-System: Quartzite: Timeball Hill (2), Daspoort (4), Magaliesberg (5), Witrand (9). Dewal Heuvel (10). Black Reef (13) Tonschiefer (3) Dolomite (1) Alte Granite (14) Sedimente begann der Gondwanakontinent in einzelne Teile zu zerbrechen. An der Grenze von M09ambique und der Republik Süd-Afrika bildete sich so entlang den Lebombobergen in

OF THE GEOLOGICAL SURVEY

''''Ilspimlous conical koppie composed of Timeball Hill Quartzite, aptly known locally as " Wonderkop " (Kee Plate VI, Fig. 1). The high dip of this very massive quartzite, its contorted nature, and isolated position, due to a powerful dip fault (see Platc XVII), produce a hill type which is unique in this HJ ea..

Gold Mining Tour - Amethyst

The old Blaauwbank Mine near Magaliesberg village for a fascinating guided underground trip. Here interbedded quartz veins within Timeball Hill shales were mined from 1874. This was the first producing mine in the region. We also see real gold being panned from the crushed ore!