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Geochemistry of the Heavy Metals in the Tansrift Mine (Atlas of Beni Mellal, Morocco) – A Pollution Assessment

Ouahzizi Youssef, Charroud Mohamed, Ali Abdelkhiar Ait, Choukrad Jaouad, El Azzab Driss

Ecological Engineering & Environmental Technology

2024

Vol. 25, iss. 3

253--263

The Tansrift mine is an open-pit exploitation mine that mines copper substances. It is located on the southwestern flank of the Beni Mellal Atlas, 9 km Northeast of Ouaouizaght village. The mining activity delivered about 650 000 t of 1.5% Cu, with an estimated reserve of 1 Mt to 1.32% Cu. In this study, seven hazardous heavy metals (Cd, Cr, Cu, Pb, Zn, Fe, and Ni) have been studied in the tailing and exploitation of the Tansrift mining district. The geochemical analysis contents of the metals were measured in the samples collected from this area. In addition, the pollution indexes, including the geo-accumulation index, the enrichment factor, the contamination factor, and the pollution load index, were used to assess pollution levels caused by those heavy metals. The Igeo index revealed a high to extreme copper contamination with a value above 4. As for the contamination factor, extreme and moderate contamination is shown by the copper and chrome in the totality of the exploitation and tailing areas. Moreover, the pollution load index shows very high pollution in all samples. The climatic conditions are also affecting the pollution of the atmosphere by contaminated dust and the water table and watershed by the contamination from the tailings and mineralized structures.

Astronium graveolens tree – mineral exploration guide in search for copper and potential use of this plant for reforestation of mining waste

Lutyński Piotr, Pieczonka Jadwiga, Piestrzyński Adam, Mosquera-Palacios Marvin, Del Castillo-Londoño Alma Cristina

Geology, Geophysics and Environment

2023

Vol. 49, no. 3

299--306

Geological mapping and sampling of sediment-hosted copper-silver mineralization in NE Colombia identified the association of the Astronium graveolens tree (Diomate Gusanero) with the elevated presence of copper (up to 317 ppm) and silver (up to 24 ppm) in plant ash. During the dry season, when most plants lose their leaves, young Astronium graveolens seedlings growing along copper sulfide-rich showings retain their green foliage. This observation allowed authors to effectively use this plant as an exploration guide in search for copper mineralization and Astronium graveolens can be potentially considered as a geobotanical indicator plant. The observed resistance of Astronium graveolens to the presence of copper sulfides suggests that this tree could be also a potential excellent species for reforestation and reclamation of tailings and other mining waste.

Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline

Pieczonka J.

Mineralogia

2010

Vol. 41, iss. 1/2

33--53

A new association of ore minerals has been found in the Lower and Middle Triassic rocks in the vicinity of the village of Woźniki in the NW part of the Upper Silesian district. In addition to the typical Zn-Pb-Fe association in dolomites, copper sulphides have been detected in the sandstones and conglomerates of the Lower Bunter. Copper mineralization occurs in the sandstone matrix and is represented by bornite, chalcopyrite, chalcocite, tetrahedrite and covellite. High admixtures of zinc in Cu sulphides and admixtures of copper in Zn-Pb sulphides suggest a common source for the metal-transporting fluids and a single period of sulphide crystallization.