northwest Witwatersrand Gold Deposits, South Africa
Welcome, Guest. Please login or register.
Monday June 25 2018 21:57:32 AEST PM
Home Help Login Register
News: Welcome to the Australianelectronicgoldprospectingforum founded in July 2010, an add free totally independent forum with over 70 boards and paid for and managed by the Admin.Total forum Topics: 9,052  Total forum Posts:43,905 Members:738 Total page views:11,460,730     Admin and  forum and domain name owner :marjen at Guests can only see a limited number of boards at present and cannot see any hot links. Guest cannot post and never will be permitted too!Registration of new members must be approved by admin.Anyone known to have any past or present association with Codan/ML or acting on their behalf as a proxy or intermediary  will not have their registration approved. All  original Photos and posts and  original materials displayed on this site are COPYRIGHTED and remain the property of the poster and the  Austalian All messages on this forum express the personal views of the author and should not be interpreted as necessarily being in accord with those of the forum owner and neither the owner of this forum and its domain name nor SMF or the forum software developers or the forum host shall be held responsible for the content of any message. Admin reserves the right to remove any offensive or objectionable posts. No defamatory material or politics/religion or issues of race will be permitted.
Proven forum hackers  and those permitting defamatory content  and engaging in misleading and deceptive conduct on their "forum" like the  village idiot- 1halfgram4three (whose forum has died of shame!!) will never  be permitted to join or rejoin the forum. The  village idiot- 1halfgram4three is permanently banned on this forum!
Why pay $200 /year to be a forum sponsor with all the limitations and restrictions placed on you when you can advertise your products/services(except any Codan/ML products/services) here for FREE just by joining this forum!
deep gold detectors. Over 14,000 views and 37 pages!!! This forum has brought you the QED("the best value for money Pi on the market"!),now to bring you  better coils!I do NOT receive ANY direct or indirect pecuniary or ANY other benefits from the sale or promotion of the QED.Any such assertions are untrue and defamatory!!
Doug is right on  climate change! "HappySAD7000user" and "Inhere"  and "Arizona"and the  village idiot 1halfgram4three("Halfie the stuff you write is rubbish")are wrong! "HappySAD7000user" and "Inhere"  and "Arizona" are  scientifically illiterate, climate denier easy beats!!!! They are terrified of the truth and too spineless to come here and debate  the climate issue!!!
The changing climate is NOT due to natural variation!
The  enormous body of diverse evidence, the physics and the overwhelming majority of climate scientists publishing in  recognized peer reviewed scientific journals agree that the earth is warming due predominately to  rising atmospheric  levels of anthropogenic C02!

australian electronic gold prospecting  |  Geology and occurrence of gold deposits  |  Gold deposits  |  Gold deposits of the world  |  Topic: Witwatersrand Gold Deposits, South Africa 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Witwatersrand Gold Deposits, South Africa  (Read 338 times)
Revered Supreme Hero Member
Online Online

Posts: 16118

« on: Monday January 31 2011 09:34:17 AEDT AM »

Recent Developments Concerning the Geological History and Genesis of the Witwatersrand Gold Deposits, South Africa
Although the gold mining industry in the Witwatersrand has passed its maturity, the Witwatersrand basin remains by far the most important known gold-producing province. Most of the gold occurs together with rounded pyrite and uraninite, and in places with bituminous carbon, along degradation surfaces in coarse grained siliciclastic rocks of the 2.97 to 2.91 Ga West Rand Group, and more importantly, in similar rocks of the 2.89 to 2.71 Ga Central Rand Group. Significant correlation between gold and detrital zircon distribution,as well as sedimentary lithofacies, preservation of detrital micronuggets in places, and absolute age data provide evidence of a detrital origin of the gold, which was derived from the weathered products of 3.1 to 2.9 Ga greenstone belts to the north and west, and transported and concentrated by fluvial selective entrainment processes. Eolian deflation led to further upgrading of the placer deposits. Microstructural, mineral chemical, and isotopic evidence indicate a detrital origin also for rounded compact pyrite and uraninite particles, from which reducing conditions are inferred for the Archean meteoric environment.
These conditions prevailed until at least 2.64 Ga, when the last Witwatersrand-type placer deposits were laid down at the base of the Transvaal basin.
doug happy face

All posts on this forum are the personal views of the author and should  not necessarily be  interpreted as those of Admin.
When is 1halfgram4three (a proven hacker and  village idiot!) going to stop telling lies on his “forum”?
Pages: [1] Go Up Print 
australian electronic gold prospecting  |  Geology and occurrence of gold deposits  |  Gold deposits  |  Gold deposits of the world  |  Topic: Witwatersrand Gold Deposits, South Africa « previous next »
Jump to:  

Login with username, password and session length

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2006-2009, Simple Machines
Simple Audio Video Embedder

BisdakworldClassic design by JV PACO-IN
Valid XHTML 1.0! Valid CSS!