Waste rock dump investigation at Roşia Montană gold mine (Romania): a geostatistical approach

Servida, Diego; Comero, Sara; Santo, Mara Dal; Capitani, Luisa De; Grieco, G.; Marescotti, Pietro; Porro, Silvia; Forray, Ferenc L.; Gál, Ágnes; Szakács, Alexandru

doi:10.1007/s12665-012-2100-6

Cited by 16 publications

(9 citation statements)

References 34 publications

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“…Since fine-grained materials are generally much more reactive than coarse grained materials (Strömberg and Banwart 1994), there is a strong connection between physical and geochemical heterogeneities that can have a key implication for the release and mobility of ARD in heterogeneous waste rocks. Heterogeneity associated with the distribution of secondary mineral contents (i.e., the post-weathered mineralogical content) is another important element controlling the extension of ARD (Servida et al 2013;Wisotzky 1994). Al et al (2000) concluded that ''reactions with the secondary minerals, rather than the primary mineral substrate, probably represent the principal controls on trace-element distributions in the pore water''.…”

Section: Models Embedding Geochemical Heterogeneitymentioning

confidence: 99%

Mechanistic models supporting uncertainty quantification of water quality predictions in heterogeneous mining waste rocks: a review

Muniruzzaman

Pedretti

2020

Stoch Environ Res Risk Assess

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Polluted drainage from weathering of sulfide-rich waste rock deposits can cause long-term impairment to waterways and biodiversity near mining sites. Mechanistic models represent established tools to support the predictions of the quantity and quality of waste rock drainage, and their associated risks. Yet, model-based predictions in typical waste rock systems are ubiquitously uncertain because of the strongly heterogeneous nature of these waste deposits. Embedding heterogeneity within predictive modeling is complicated by the magnitude and level of knowledge of the waste rock heterogeneity, and the large number of scale-dependent parameters feeding the model equations. This review encompasses deterministic and stochastic modeling approaches that emphasize consolidated tools and emerging modeling solutions to deal with heterogeneity for the modeling of waste rocks. Physical (e.g., variability of texture, hydraulic and pneumatic properties), geochemical (e.g., variability of mineralogy and kinetic parameters), and thermal heterogeneities are evaluated. The review points out the importance of stochastic modeling as a fundamental approach to embed uncertainty in long-term model-based decisions. Regulators and decision makers must be convinced of the benefit of using stochastic modeling, which is still considered to belong mainly to the academic sphere.

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Section: Models Embedding Geochemical Heterogeneitymentioning

confidence: 99%

Mechanistic models supporting uncertainty quantification of water quality predictions in heterogeneous mining waste rocks: a review

Muniruzzaman

Pedretti

2020

Stoch Environ Res Risk Assess

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“…Volcanic massive sulfide (VMS) copper deposits, like those of the Northern Albania mining district, add to this frame the high concentration of sulfides in the massive ore and the high pyrite content (e.g., [4][5][6]). Pyrite is, by far, the main responsible of AMD in these ores due to its abundance and its high sulfur to metal ratio that leads to the highest sulfuric acid production per mass unit (e.g., [6][7][8][9][10][11][12] and references therein). Moreover, pyrite is nowadays always dumped with the tailings during beneficiation as it is no longer used to produce sulfuric acid as in the past.…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact Variability of Copper Tailing Dumps in Fushe Arrez (Northern Albania): The Role of Pyrite Separation during Flotation

et al. 2021

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Acid mine drainage and potentially toxic elements release are a major source of pollution in sulfide-rich mining sites. Pyrite is the most impacting mineral due to its high acidification potential when it reacts with water under oxidizing conditions. At the Fushe Arrez dressing plant in Northern Albania, a volcanic massive sulfide copper mining district, pyrite was in past separated, with a double flotation process, to produce a pyrite concentrate and relatively-pyrite-poor tailings. In the last twenty years single flotation has replaced the double flotation process and pyrite has been deposited in pyrite-rich tailings stacked separately from the old ones. The study of the solid tailing materials and natural waters flowing through the dumping area, together with leaching tests show that waters interacting with single flotation tailings are slightly more acidic and much higher in total metal contents than those interacting with double flotation tailings. Also, the metal distribution is different, with the former being higher in sulfide-hosted metals and the latter higher in gangue-hosted metals. It is thus suggested that separation of pyrite can play an important role in the sustainable mining of pyrite-rich ores, either for dumping high hazardous pyrite concentrate separately or for marketing it as a by-product. An implementation of studies for the industrial uses of pyrite is pivotal in this last case.

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“…Waste-draining waters are the main contamination of the Roșia stream. It is highly acidic and also has elevated contents of As (arsenic), Cd (cadmium), Al (aluminum),Cr (chromium), Se (selenium), and So (sulfate) 4 ^2-81 .The acidic 72 solutions are iron-rich, and fill voids such as intragranular species, intraclast fractures and other porous objects 82 . Acid rain containing heavy metals such as cadmium, chromium, copper, iron, lead, and zinc, also emanate from the areas around the Abrud river 83 .…”

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confidence: 99%

Inter-Mountain Resource Extraction: A Comparative Study of Gold Mining in Appalachia and Carpathia

Wright

2020

BUT PCS

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In regions such as Appalachia and Carpathia, gold mining has existed for centuries. However, the lucrative cost of gold in the regions has also produced a devastating environmental impact which deeply shaped the sociocultural and economic development of the regions. Utilizing case studies in Dahlonega, Georgia and Rosia Montana, Romania, I illuminate the closely tied human-geography of the regions. Through my research, I draw direct connections between the exploitation of human labor, culture, and the environment. By detailing how intrinsically connected people are to place, I examine the importance of vigilant politics, locally-oriented economics, and the need for cultural and environmental preservation.

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Waste rock dump investigation at Roşia Montană gold mine (Romania): a geostatistical approach

Cited by 16 publications

References 34 publications

Mechanistic models supporting uncertainty quantification of water quality predictions in heterogeneous mining waste rocks: a review

Mechanistic models supporting uncertainty quantification of water quality predictions in heterogeneous mining waste rocks: a review

Environmental Impact Variability of Copper Tailing Dumps in Fushe Arrez (Northern Albania): The Role of Pyrite Separation during Flotation

Inter-Mountain Resource Extraction: A Comparative Study of Gold Mining in Appalachia and Carpathia

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