scholarly journals Kherzet Youcef Mine Flooding of 2nd June 1990 Revisited (Northeastern of Algeria) Origine and Hydrogeological Consequences

2021 ◽  
Author(s):  
CHEDDAD Souhila ◽  
Haouchine Abdelhamid
Keyword(s):  
Aquifer System ◽  
Ore Bodies ◽  
Lead And Zinc ◽  
Hydrogeological Study ◽  
Zn Content ◽  
North Eastern ◽  
Mine Flooding ◽  
Hydrogeological Studies ◽  
Eastern Algeria ◽  
And Storage

Abstract This work is part of the hydrogeological study of the Kherzet Youcef deposit. The polymetallic deposit of Kherzet Youcef, known, since the beginning of the 20th century, by the exploitation of Lead and Zinc ore, is located 50 Km southeast of Setif (North-eastern Algeria) and 5.5 Km west of Ain Azel. Mineralization is represented by some ore bodies (about 25). The thickness variate from a few centimeters up to 3m. These bodies are located on the layers of dolomites and dolomitized marls and along the Kherzet Youcef fault. The geological reserves of Zinc and Lead ore are of the order of 1.6 million tons. This ore has a Pb content of 3.6% and Zn content of 18.4%. The projected annual exploitation was 100 thousand tons per year. Hydrogeological studies carried out successively (1973-1977) and (1981-1983) revealed the existence of an aquifer system located west of the Kherzet Youssef fault characterized by the presence of Karts and by strong cracking due to local brittle tectonics. These two characteristics define the filtration and storage capacity of very abundant groundwater. This groundwater represented a major handicap for mining in view of the large amounts of water that required the installation of major pumping and drainage devices. The Kherzet Youssef mine has experienced frequent flooding in the past at a time when technology could not pump efficiently. It caused the mine to close several times. In June 1990, the mine experienced a flood of great magnitude that has never been observed and despite the large installed means of pumping, this "water cost" led to the total drowning of the mine, the death of 19 workers and the stoppage of the exploitation of this deposit since. Pitting attempts were carried out with a pumping capacity of 1100 m3/h, then 1800 m3/h but without success. The interpretation of the drawdown data and field observations made it possible to conclude that this accident was only the result of the general destabilization of the massif. Our complementary work by geophysical prospecting made it possible to represent the configuration of the underground layers and demonstrate the hydrodynamic communication between the two East and West compartments of the deposit.

scholarly journals Kherzet Youcef Mine Flooding of 2nd June 1990 Revisited (Northeastern of Algeria) Origine and Hydrogeological Consequences

2021 ◽  
Author(s):  
CHEDDAD Souhila ◽  
Haouchine Abdelhamid
Keyword(s):  
Storage Capacity ◽  
Aquifer System ◽  
The Past ◽  
Ore Bodies ◽  
Lead And Zinc ◽  
Zn Content ◽  
North Eastern ◽  
Mine Flooding ◽  
Eastern Algeria ◽  
And Storage

Abstract This work is part of the hydro geological study of the Kherzet Youcef deposit. The polymetallic deposit of Kherzet Youcef is known since the beginning of the 20th century. It is known by the exploitation of Lead and Zinc ore. It is located 50 Km southeast of Setif (North-eastern Algeria) and 5.5 Km west of Ain Azel. Mineralization can be described by some ore bodies (about 25). The thickness variate from a few centimeters up to 3 m. These bodies are located on the layers of dolomite and dolomitized marl and along the Kherzet Youcef fault. The geological reserves of Zinc and Lead ore are of the order of 1.6 million tons. This ore has a Pb content of 3.6% and Zn content of 18.4%. The projected annual exploitation was 100 thousand tons per year. Hydro geological studies carried out successively (1973-1977) and (1981-1983) revealed the existence of an aquifer system located west of the Kherzet Youssef fault. It is characterized by the presence of Karts and by strong cracking due to local brittle tectonics. These two characteristics define the filtration and storage capacity of very abundant groundwater. This groundwater represented a major handicap for mining in view of the large amounts of water that required the installation of major pumping and drainage devices. The Kherzet Youssef mine has experienced frequent flooding in the past at a time when technology could not pump efficiently. It caused the mine to close several times. In June 1990, the mine experienced a flood of great magnitude that has never been observed and despite the large installed means of pumping, this 'water costled to the total drowning of the mine, the death of 19 workers and the stoppage of the exploitation of this deposit since. Pitting attempts were carried out with a pumping capacity of 1100 m3/h, then 1800 m3/h but without success. The interpretation of the drawdown data and field observations made it possible to conclude that this accident was only the result of the general destabilization of the massif. Our complementary work by geophysical prospecting made it possible to represent the configuration of the underground layers and demonstrate the hydrodynamic communication between the two East and West compartments of the deposit.

The Study of Biogeoavailability of Calcium in Ashaka Cement Industry Environs of North Eastern Zone of Nigeria

2009 ◽  
Vol 62-64 ◽  
pp. 380-384
Author(s):  
A.I. Inegbenebor
Keyword(s):  
Standard Deviation ◽  
Standard Error ◽  
Cement Industry ◽  
Statistical Interpretation ◽  
Base Metals ◽  
Ore Bodies ◽  
Lead And Zinc ◽  
Eastern Zone ◽  
North Eastern ◽  
The Common

The samples in the study of Ashaka cement environs were collected on both mineralized and unmineralized ground. These were analyzed to determine the amounts of the elements absorbed by the plants in the area under study using analytical methods (IR, AAS). The observations and prediction of the results show that secondary carbonate minerals, especially those of the common base metals such as magnesium, lead and zinc may be found in Gombe-Bauchi ore bodies include associate minerals. The associate minerals that may be found are hydrozincite, Zn5(CO3)2(OH)6, hydrocerussite, Pb3 (CO3)2 (OH)2 and the very rare mineral plumbonacrite, PbOO(OH)6(CO3)2, Dypingite, Mg5(CO3)4(OH)2.5H2O etc. This is in accordance with the statistical interpretation of the results. The standard deviation were identified as action line , which is equivalent to 59.16 and 49.84 , while two standard error as warning lines, that is resulting in 58.91 . The expectation of these minerals in abundance depends on the ratio of a(Ca2+)/a(Mg2+), a(Ca2+)/a(Zn2+) and a(Ca2+)/a(Pb2+). The technological importances of these associate and very rare minerals are discussed.

Ground beetles (Coleoptera: Carabidae) assemblages in two agricultural landscapes in North-Eastern Algeria

2014 ◽  
Vol 40 (2) ◽  
pp. 5-16 ◽  
Author(s):  
Yasmina Saouache ◽  
Salaheddine Doumandji ◽  
Nadia Ouchtati
Keyword(s):  
Ground Beetles ◽  
Agricultural Landscapes ◽  
North Eastern ◽  
Eastern Algeria

Environmental determinants of mayfly assemblages in the Seybouse River, north‐eastern Algeria (Insecta: Ephemeroptera)

Biologia ◽  
2021 ◽  
Author(s):  
Boudjéma Samraoui ◽  
Zineb Bouhala ◽  
Khemissa Chakri ◽  
Joaquín Márquez-Rodríguez ◽  
Manuel Ferreras-Romero ◽  
...  
Keyword(s):  
Environmental Determinants ◽  
North Eastern ◽  
Eastern Algeria

Biogeography, ecology, and conservation of mayfly communities of relict mountain streams, north‐eastern Algeria

2021 ◽  
Author(s):  
Boudjéma Samraoui ◽  
Joaquín Márquez‐Rodríguez ◽  
Manuel Ferreras‐Romero ◽  
Hamed A. El‐Serehy ◽  
Farrah Samraoui ◽  
...  
Keyword(s):  
Mountain Streams ◽  
North Eastern ◽  
Eastern Algeria

scholarly journals Hydrogeological study of mangrove areas around Guanabara Bay, Rio de Janeiro, Brazil

2003 ◽  
Vol 26 ◽  
pp. 92-100
Author(s):  
Gerson Cardoso da Silva Júnior ◽  
Carlos Eduardo Braga ◽  
Ingrid De Carvalho Lage
Keyword(s):  
Rio De Janeiro ◽  
Research Effort ◽  
Industrial Effluents ◽  
Field Work ◽  
Mangrove Ecosystem ◽  
Analytical Models ◽  
Guanabara Bay ◽  
Petrochemical Complex ◽  
Hydrogeological Study ◽  
Hydrogeological Studies

The study area covers part of the mangrove belt located around Guanabara Bay, Rio de Janeiro, Brazil. Representing a continental-marine transition, the mangrove ecosystem is very susceptible to environmental variations and impacts. The vegetation cover plays an important role in prevention of erosion and contamination processes in those areas. An ongoing extensive research effort in the Petrochemical Complex of Duque de Caxias, Rio de Janeiro State, Brazil, focuses on the man-induced changes in the physical environment (soils, groundwater flow system, type and volumes of contaminants, geochemical aspects) and the consequences on the neighboring mangrove ecosystem. This article describes the importance of hydrogeological studies in mangrove areas as part of an appropriate environmental assessment, taking as an example an industrial dumping area located in that Petrochemical Complex. Field work included extensive drilling and sampling to obtain basic geological and hydrogeological parameters and data in the pilot area, such as hydraulic conductivity and piezometric heads; emphasizing the tracking of possible contamination by industrial effluents and the marine influence; validation of the conceptual model with mathematical models (numerical and analytical models) was carried out. Results show the great importance of well conducted and detailed hydrogeological studies to properly address environmental problems caused by industrial plants in mangrove areas.

scholarly journals Biodiversity of bulbous and tuberous geophytes from the El Kala National Park (North-Eastern Algeria): checklist, vulnerability and conservation

2019 ◽  
pp. 25-38
Author(s):  
Besma Dechir ◽  
Atef Chouikh ◽  
Tarek Hamel ◽  
Nawel Nadia Azizi ◽  
Nawel Ganaoui ◽  
...  
Keyword(s):  
New Species ◽  
Environmental Variables ◽  
National Park ◽  
Multivariate Analyses ◽  
North Eastern ◽  
Floristic Analysis ◽  
The Subject ◽  
Eastern Algeria ◽  
A New Species

Treinta estaciones en el Parque Nacional El Kala (Noreste de Argelia) fueron objeto de un inventario florístico que se centró en el estudio de la ecología de geófitos bulbosos y tuberosos. La flora se caracteriza por una alta proporción de taxones raros y/o endémicos, entre ellos, 6 especies son endemismos algero-tunecinos pertenecientes a la familia Orchidaceae. En este trabajo, se da a conocer la presencia de una nueva especie para la flora argelina, Ophrys fusca subsp. lupercalis. Los análisis multivariantes revelaron, ciertas variables ambientales que determinan la distribución de los geófitos. Los lugares de interés son particularmente sensibles a las amenazas, particularmente las de origen antrópico. Thirty stations at the El Kala National Park (North Eastern Algeria) were the subject of a floristic focused on the study of the ecology of bulbous and tuberous geophytes. The floristic analysis was used to draw up a checklist of 67 species belonging to 36 genera and 14 families, among of which 19 species a high proportion of rare and/or endemic taxa; among them six signed taxa are endemic to algerian-tunisian mainly represented by family of Orchidaceae. In this work, we recorded the presence of a new species for the Algerian flora which is Ophrys fusca subsp. lupercalis. Multivariate analyses revealed certain environmental variables determining the distribution of geophytes. The visited sites show an alarming vulnerability and subject to threats, particularly anthropogenic ones.

scholarly journals Storage and Condition of Biomass Influence to Biosorption of Lead (II) and Zinc(II) by Saccharomyces cerevisiae Biomass

2010 ◽  
Vol 1 (1) ◽  
pp. 11-15
Author(s):  
Jasmidi Jasmidi ◽  
Eko Sugiharto ◽  
Mudjiran Mudjiran
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Atomic Absorption ◽  
Room Temperature ◽  
Final Concentration ◽  
Biomass Storage ◽  
Lead And Zinc ◽  
The Difference ◽  
Biomass Influence ◽  
And Storage ◽  
Zinc Storage

The influence of length and condition of Biomass Storage on the biosorption of lead and zinc that present together in a solution by Saccharomyces cerevisiae biomass were studied. In this experiment, variables of length and condition of biomass storage were examined. Concentration of lead and zinc were determined by atomic absorption spectrophotometric (AAS) using air-acetilene as atomizing flame. Loading of lead and zinc on the biomass were determined as the difference between the initial and the final concentration of lead and zinc in the solution. Biosorption of lead and zinc were influenced by condition and storage of the biomass. Storage of biomass in the room temperature for one week cause an increasing uptake. Storage for longer period result in decrease of lead and zinc uptake. Storage of biomass in a freezer up to 2 weeks increased the uptake of lead, but did not influence the uptake of zinc. Storage for longer period decreased the uptake of both of lead and zinc. For all condition the uptake of lead higher than the uptake of zinc by Saccharomyces cerevisiae.

Nesting ecology of Ferruginous DuckAythya nyrocain north-eastern Algeria

2015 ◽  
Vol 50 (4) ◽  
pp. 299-305 ◽  
Author(s):  
Aicha Fouzari ◽  
Farrah Samraoui ◽  
Ahmed H Alfarhan ◽  
Boudjéma Samraoui
Keyword(s):  
Nesting Ecology ◽  
North Eastern ◽  
Eastern Algeria
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