Artisanal and Small-Scale Mining

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Environmental Mineralogy and Biogeochemistry".

Deadline for manuscript submissions: closed (1 December 2019) | Viewed by 6494

Special Issue Editor


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Guest Editor
British Geological Survey, Nicker Hill, Keyworth NG12-5GG, UK
Interests: mine waste and mine water: characterisation, environmental impact, remediation; environmental liability of abandoned mines; diffuse pollution source apportionment; mine water geothermal potential; critical metal recovery from mine waste; geochemical modelling of low temperature water-rock interaction

Special Issue Information

Dear Colleagues,

Artisanal and small-scale mining (ASM), broadly defined as informal mining using rudimentary processes to extract minerals or gems, often with no or very little mechanization, occurs in many developing countries throughout the world. While an estimated 20–30 million people worldwide work in ASM, representing a key source of revenue in many developing nations, ASM can simultaneously create new or exacerbate existing environmental, health, and socio-economic challenges. Examples of ASM activities include (but are not limited to) digging for gemstones, sand winning, coal mining, gold mining, clay mining, and peat extraction. The effects of single ASM activities on the environment and public health may well be non-significant; however, when they occur simultaneously, their effect may increase by orders of magnitude. The negative impacts on ecosystems via the unsustainable use of natural resources with land/water quality degradation and deforestation are well recognised. The type of mine, method of mining and refinement of extracted material will have various impacts on the environment. In particular, mercury use in ASM (and artisanal and small-scale gold mining (ASGM)) is the largest source of mercury releases to the environment globally, and mercury emissions from the sector are transported through the environment on both a local and global scale.

With the increase of worldwide initiatives to introduce sustainable ASM practices, this Special Issue aims to capture emerging research, practices, and approaches to tackle the environmental challenges and related public health issues posed by ASM. We welcome submissions on the following topics: The role of ore deposit geology, geochemistry and mineralogy in ASM practices and environmental impact; case studies of integrated (socio-economic-health and environment) assessments of ASM, also including climate change considerations; sustainable ASM practices; remediation strategies; the applicability of earth observation for identifying and monitoring ASM.

Dr. Barbara Palumbo-Roe
Guest Editor

Manuscript Submission Information

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Keywords

  • sustainable ASM mining
  • artisanal mining resources
  • ASM mine tailings characterisation
  • ASM environmental hazards
  • ASM management and remediation
  • integrated assessment of ASM
  • mercury gold
  • mercury and small-scale mining
  • mining and cyanide

Published Papers (1 paper)

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Research

20 pages, 2492 KiB  
Article
The Importance of Mineralogical Knowledge in the Sustainability of Artisanal Gold Mining: A Mid-South Peru Case
by Pura Alfonso, Hernan Anticoi, Teresa Yubero, Marc Bascompta, Laura Henao, Maite Garcia-Valles, Silvia Palacios and Juan Yáñez
Minerals 2019, 9(6), 345; https://doi.org/10.3390/min9060345 - 5 Jun 2019
Cited by 17 | Viewed by 5590
Abstract
Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy. The deposits from this belt are intrusion gold related to mineralization in [...] Read more.
Mineralogy and gold processing techniques from several mining areas of the Nazca-Ocoña gold belt, Mid-South Peru, were investigated to assess the efficiency of gold extraction methods in relation to their mineralogy. The deposits from this belt are intrusion gold related to mineralization in quartz veins. Native gold occurs as micrometric grains encapsulated in pyrite and in minor amounts in other sulfides and quartz. Electrum is found mainly in fractures of pyrite and attains up to 35 wt. % Ag. In addition to these occurrences, gold tellurides also occur and they are abundant in San Luis. Gold processing is carried out by amalgamation with mercury and/or cyanidation. The comparison of the gold grade in the mineralizations and in the residual tailings indicates that a significant amount of gold is not recovered using the mercury amalgamation process and also, in the case of the gold recovery by cyanidation, except when cement was added to the cyanide solution. This was due to an increase in the pH that favours the dissolution of the gold matrix. In the cyanidation process carried out in tailings previously treated with mercury, part of the mercury retained in them is released to the atmosphere or to the cyanidation fluids. Full article
(This article belongs to the Special Issue Artisanal and Small-Scale Mining)
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