News Article | May 8, 2017
Workers stand next to an open pit at Barrick Gold Corp's Veladero gold mine in Argentina's San Juan province, April 26, 2017. REUTERS/Marcos Brindicci SAN JUAN, Argentina(Reuters) - Barrick Gold Corp failed to complete improvements to the Veladero mine in Argentina that could have prevented the third spill of cyanide solution in 18 months, leading to eventual sanctions for the world's biggest gold miner, a judge told Reuters. Barrick appears to have missed deadlines on three orders from local authorities, including replacing pipes, before the March 28 spill, said Pablo Oritja, the judge overseeing cases related to Veladero in the nearby town of Jachal, where “Barrick out" graffiti lines the streets. "If they had changed pipes as ordered, the decoupling (of pipes) would not have occurred," Oritja told Reuters on Friday, the day after meeting the head of the mining police in western Argentina's San Juan province, where Veladero and Jachal are located. The findings "will eventually end in sanctions against the company," said Oritja, judge at the Judicial Court of Jachal. The investigation into past negligence, along with the provincial government's review of Barrick's mine improvement plan, could delay the Canadian company's goal of restoring one of its top five mines worldwide to normal production in June. Barrick has followed established regulatory procedures to comply with the requirements issued by San Juan authorities following the recent spills at Veladero, spokesman Andy Lloyd told Reuters in response to Oritja's comments. Sanctions would come from the San Juan government and could include a fine and restrictions to operating Veladero. Oritja, who indicted nine current and former Barrick executives accused of negligence after Barrick's first spill in 2015, could also levy more charges if he determines cyanide posed harm to people or the environment. San Juan's government suspended the addition of cyanide to Veladero's gold processing facility after the latest spill, and gave the mine an ultimatum to overhaul safety and environmental operations. Cyanide is used to separate the gold from ore. In September, all operations at Veladero were temporarily shut down, adding to Barrick's troubles in South America, where its Pascua-Lama project on the Argentine-Chile border has been on hold since 2013 due to environmental issues, political opposition, labor unrest and development costs. San Juan province Mining Minister Alberto Hensel says the repeated Veladero spills may result in a fine higher than the $9.8 million Barrick paid after the first spill, when a United Nations agency said 1 million liters of solution containing cyanide spilled into a river providing drinking water. The spills in September 2016 and March of this year were smaller and contained in the mine site, Barrick and the San Juan mining police said. Still, Oritja ordered blood tests last month to check for health problems related to cyanide in residents of Jachal, a town of mostly mud homes 150 kilometers from Veladero that remains poor despite its proximity to Argentina's largest gold reserves. Lloyd said there have been no health risk to communities or the environment, though the company seeks to improve transparency and relations with nearby towns. The incomplete orders referenced by Oritja were given in December and February and involve fixing Veladero's pipe system, a source at the San Juan government told Reuters. Hensel said Barrick also failed to complete an "urgent review" of the pipe system before the third spill. Lloyd said an engineering report on the pipes was completed "in recent weeks." Lloyd said Veladero had 2,685 active environmental obligations and a compliance rate of 99 percent, and was taking action on the one percent. "This is a strong track record when you step back and consider the number of permits and obligations involved, and the fact that at any mine, there is always an ongoing process to respond to and implement regulatory actions that take time to complete and involve ongoing discussions with regulators," Lloyd said. Barrick presented San Juan province with a new plan in late April, Hensel told Reuters, after an initial one was rejected. All proposed work would need to be approved and completed before restrictions are lifted, he said. Primary repairs, included in a $500 million five-year investment plan, should be finished before a recently announced sale of half of Veladero to Shandong Gold Mining Co <600547.SS> is finalized, Lloyd said, though Shandong will share future costs.
Zhai S.,Appraisal Center for Environment and Engineering |
Zhai S.,China University of Petroleum - Beijing |
Xiao H.,Wuhan University |
Zhao Z.,Shandong Gold Mining Co.
Chinese Journal of Geochemistry | Year: 2013
This article gives a review on heavy metal pollution prevention and control, and it also discusses heavy metal pollutant discharge, prediction and evaluation of environmental impact, and pollution prevention and monitoring. © 2013 Science Press, Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg.
Lan T.,CAS Institute of Geology and Geophysics |
Fan H.,CAS Institute of Geology and Geophysics |
Hu F.,CAS Institute of Geology and Geophysics |
Jang K.,CAS Institute of Geology and Geophysics |
And 2 more authors.
Acta Petrologica Sinica | Year: 2012
Changyi iron deposit, located at Jiaobei terrane, eastern North China Craton (NCC), is a banded iron formation (BIF) deposit kept in Paleoproterozoic Fenzishan Group. Ore bodies of the deposit are lens- or layer-like and mainly composed of amphibolitebearing magnetite quartzite, which have expericed <636°C amphibolite facies metamorphism. Major contents of SiO2 and Fe2O3 T(SiO2 + Fe 2O3 T =82.5% -97.7%) coupled with minor Al 2O3, MgO and CaO suggest that the ores originated from chemical deposition contaminated by clasitic or pelitic materials. LREE depletion, high Y/Ho ratios and positive La and Y anomalies indicate a marine environment. In addition, high Ti/V ratios, high Cr, Co and Ni concentrations as well as positive Eu anomalies suggest involvement of high-temperature hydrothermal fluids, implying ore-forming elements were related to submarine volcanic activities. The lack of negative Ce anomalies also suggests an anoxic environment. Compared with Archean BIFs of NCC, the higher Al2O 3, MgO, CaO and K2O contents as well as weaker positive Eu anomalies indicate that the Paleoproterozoic Changyi BIF deposit obtained more clastic or pelitic materials and less hydrothermal fluids in a shallower marine environment.
Zhou Y.,University of Science and Technology Beijing |
Wu S.C.,University of Science and Technology Beijing |
Wang X.Q.,Hebei University of Technology |
Ding J.F.,Shandong Gold Mining Co.
Rock Mechanics: Achievements and Ambitions - Proceedings of the 2nd ISRM International Young Scholars' Symposium on Rock Mechanics | Year: 2012
Particle Flow method is widely applied in meso mechanical research field. Codes such as PFC 3D program generate calculation model with particles. Meso-scale mechanical parameters can only be obtained by varying them until the macro mechanical parameters of the numerical sample match that of the laboratory rock-soil mass sample. The corresponding parameters maybe then used in asimulation of problem containing the same solid material as the sample. Based on PFC 3D program, a nonlinear network model linked macro mechanical parameters and meso-scale mechanical parameters is founded by adopting BP neural network, so meso-scale mechanical parameters can be inversed rapidly and accurately by inputting macro mechanical parameters. Some studying results are drawn as follows: (1) Precision of macro mechanical parameters calculated by inversed results is generally over 90%; (2) Inversion performance of BP neural network model is best when Resolution(RES) equals 10 and the hidden layer has six neurons. © 2012 Taylor & Francis Group.
Li G.,University of Science and Technology Beijing |
Hu N.,University of Science and Technology Beijing |
Chen Y.,Shandong Gold Mining Co. |
Xiu G.,Shandong Gold Mining Co.
ICMHPC - 2010 International Conference on Mine Hazards Prevention and Control | Year: 2010
The components of safety management for underground metal mines were summarized according to the requirements of safety production, which include the safety of environment states, personnel behaviors, and equipment operations as well as the safety guarantee system. Therefore, a framework of integrated management of production safety for underground metal mines was built up based on the technology of Geographical Information System (GIS). Several drawings, such as the vertical projection drawing of stopes, the plan of levels, and the layout plan of production system were selected as base maps, so that the function system of the production safety management was figured out by taking the stopes, excavation faces, and key equipment as basic unit respectively. Both the distributed collection and integrated demonstration of the production safety information are available in the system. © Atlantis Press, 2010.
Wang R.-J.,Shandong Gold Mining Co. |
Wang C.-Z.,Shandong Gold Mining Co. |
Liu H.-L.,Shandong Gold Mining Co. |
Liu H.-L.,Northeastern University China |
And 2 more authors.
Dongbei Daxue Xuebao/Journal of Northeastern University | Year: 2015
As the failure of rock is a size-invariant process, the study of acoustic emission in the failure process of rock sample can enhance the understanding of the engineering rock mass instability process. The characteristics of rock acoustic emission activity in uniaxial compression were discussed and the condition of “acoustic emission quiet period phenomenon” before rock failure was intensively researched. According to the comparative analysis of “silence zone” in acoustic emission monitoring results during the rock failure process, it is concluded that the variation of the acoustic emission characteristics and the stress state during rock process should be thoroughly investigated when monitoring the stability of underground engineering rock mass. Thus it is possible to accurately identify the precursory phenomena of rock mass failure, and make a forecast of geological disasters effectively. ©, 2015, Northeastern University. All right reserved.