Using Sigmoid Functions For Modelling South African Gold Production

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F10%3A10224687" target="_blank" >RIV/61989100:27350/10:10224687 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Using Sigmoid Functions For Modelling South African Gold Production

Original language description

Sigmoid functions were used to approximate the cumulative gold production curve of Southern Africa and to extrapolate them into the future. Southern Africa was chosen because one third of the historic global world gold production comes from the Witwatersrand basin area, and also because the peak gold point was already reached in 1970. All models give a good agreement with reality, when the negative effects of World War II and the positive effects of the apartheid boom 1950 - 1970 are compensated for. From today's viewpoint the Gompertz function was found to give the best model, although this model implies the peak occurred 10 years earlier and due to the apartheid boom was about 300 tons higher. It also shows that the production could possibly rise again in the future to a level of 400 or even 500 metric tons a year.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DH - Mining industry including coal mining and processing

OECD FORD branch

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Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2010

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

GeoScience Engineering

ISSN

1802-5420

e-ISSN

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Volume of the periodical

2010

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

15

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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