South-East Europe

Author(s):  
William O'Brien

Copper was the first metal used by humans, a practice that began at different times in various parts of the world. The earliest evidence comes from the Near East around 10,000 years ago, when some early farming communities started to experiment with surface finds of native copper. Initially collected for their golden colour, it was soon discovered that these small pieces of pure copper could be cold-hammered into desired shapes, making them different from rock minerals. This first occurred in areas such as northern Iraq and eastern Anatolia where native copper occurs naturally. By 7000 BC there is evidence from sites such as Cayönü in Anatolia for the heating of native copper (annealing) to improve the production of beads, awls, and other small objects (Muhly 1988, 1989). In time, this led to another important discovery, namely that native copper could be melted and poured into moulds at temperatures around 1083º C. It is not certain when this first occurred, but most probably in the sixth millennium BC (see Pernicka and Anthony 2010 for overview). One of the reasons for the slow development of metallurgy in the Near East was the scarcity of native copper. The growing interest in metal eventually led to experimentation with copper minerals, such as malachite or azurite (Wertime 1973). These were initially used for non-metallurgical purposes, with malachite beads dating to the eleventh millennium BC known from a number of sites, including Shanidar Cave in northern Iraq (Solecki 1969). They were first recognized during the search for native copper, when rock outcrops were discovered bearing the distinctive green or blue staining produced by oxidation of copper minerals. The extraction of these surface minerals must have led in some instances to underground mining. It is not certain when copper ore was first smelted in the Near East. The dating of copper smelting slag at Catal Höyük in south-central Anatolia to the seventh millennium BC remains contentious. The earliest secure evidence comes from the later fifth millennium BC, at sites such as Norsuntepe in southeast Anatolia and Abu Matar in the northern Negev, Israel (Pernicka 1990; Golden et al. 2001).

Nematology ◽  
2010 ◽  
Vol 12 (1) ◽  
pp. 65-80 ◽  
Author(s):  
Nevin Keskin ◽  
Selcuk Hazir ◽  
Robin Giblin-Davis ◽  
W. Kelley Thomas ◽  
Canan Hazir ◽  
...  

AbstractThe diversity and distribution of nematodes associated with soil-dwelling bees in Turkey were examined. A total of 9456 wild bees were collected and dissected to detect nematodes and 173 female and 22 male bees were positive for an overall association level of 2.1%. Halictus resurgens was the most commonly collected bee found with nematodes with 82 and 19 nematode-infested female and male bees, respectively. Sixty-four of the nematode isolates were recovered from the Black Sea region (32.8%), 59 from Central Anatolia (30.3%), 35 from the Mediterranean (17.9%), 24 from the Aegean (12.3%), six from Eastern Anatolia (3.1%) and seven from Southeast Anatolia (3.6%). In 3.9% of all bees of the family Halictidae (173/4417), nematodes were observed in the Dufour's gland, poison sac, oviduct, bursa copulatrix and abdominal cavity of dissected female bees and from the genital capsule of male bees. Only abdominal glands of 0.6% (21/3279) of female bees from the family Andrenidae were observed with nematodes. Nematodes were isolated from the genital capsule of one male bee from the family Melittidae. The poison sac was the organ where nematodes were most often observed but the highest number of nematodes occurred in the abdominal cavity. Most nematodes were in the dauer juvenile stage making identification difficult. Sequence analysis using LSU D2/D3 domains and a fragment of mitochondrial cytochrome oxidase I (mtCOI) allowed for putative identification of nematode isolates. Two or three species of Bursaphelenchus (B. anatolius, B. debrae, and potentially one or more cryptic species closest in morphology to B. anatolius) were isolated from six different halictid species (two genera; Halictus and Lasioglossum) from different geographical regions in Turkey. An additional four species of diplogastrid were recovered from the abdominal glands of andrenids; a new species of Koerneria from Andrena limata and a separate sister clade to Mononchoides composed of three other possible species from four Andrena species. An additional unknown species in the order Tylenchida (near Allantonematinae) was recovered from three species of Lasioglossum. No molecular data were obtained from three mermithid juveniles from two Andrena and one Halictus species because samples were lost in transit. The associations of most nematode isolates with bees of the families Halictidae and Andrenidae were hypothesised to be phoretic, whereas the tylenchid and mermithids were parasites.


1992 ◽  
Vol 24 (3) ◽  
pp. 507-550 ◽  
Author(s):  
Luis Valenzuela

This article looks at the beginnings and early development of the modern copper smelting industry in Chile. It analyses the factors which led to its occurrence, contrasting it with other countries where no smelting industry developed. It argues that the development of the Chilean smelting industry stimulated copper mining and reinforced the expansion of coal mining. Furthermore, it permitted the retention in the country of a larger part of the rent generated by copper mining than would have been the case had all the copper ore been exported, and was therefore an important factor in the development of the Chilean economy as a whole.Until 1879 tne Chilean copper industry was the most dynamic sector of the economy of the Republic. During the period 1844—79 it generated exports of 341 million pesos (around £64 million), or 42.3 % of the total value of the exports of the country, and contributed 29 million pesos, or almost 10% of the ordinary fiscal income, through the export duty levied.1 Most of this copper left Chile in the shape of ingots of over 99% fine (that is pure) copper, bar copper of c. 96 % fine or regulus, a semi-processed form of copper of around 50% fine; only 12.1 % left in the shape of copper ores of different types.2 The smelting and, to an even greater extent, the refining of the copper ore in Chile permitted the miners to develop a wider variety of potential markets. It also facilitated the Luis Valenzuela is a Lecturer at the Centre for Development Studies, University College of Swansea.


Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2998 ◽  
Author(s):  
Krzysztof Skrzypkowski

The article presents the impact of geological and mining factors on the stability of room excavations in the Legnica-Głogów Copper District (LGOM) in Poland. In underground mining, the primary task of bolting of mining excavations is to ensure their stability as an essential condition of work safety. Appreciating the role and importance of the rock bolting in Polish ore mining; rock bolt load sensors were designed, manufactured and tested under laboratory conditions. The purpose of the research was to characterize the sensors and determine the elastic range of the bearing plate, which are an integral part of the sensor. The sensors have been verified in industrial conditions. The tests were carried out in the underground copper ore mine in Poland. Three rooms in the exploitation field were selected for testing, where exploitation was carried out at a depth of 809–820 m below the ground surface with the application of room and pillar with roof deflection and maintaining the central part of the field. The exploitation field included 60 rooms and pillars. The effectiveness of the mechanical load sensor of the expansion rock bolt support has been experimentally confirmed. Based on mine research, it was found that the largest increases in the load of the rock bolting, vertical stress and convergence occur in the middle of the mining field.


2020 ◽  
Author(s):  
Karolina Owczarz ◽  
Anna Kopeć ◽  
Dariusz Głąbicki

<p>The level of intensity of induced seismic phenomena occurring in areas of mining activity is very diverse. Induced shocks may be directly related to the exploitation carried out or to mining and tectonic factors. In the case of impact on the surface, two types of mining tremors are distinguished: energetically weak shocks, not causing surface deformation, and shocks exceeding a certain energy level, which cause terrain deformations. Surface displacements are the most common form of the effects of underground mining operations, including induced seismicity. Geological research uses Sentinel-1 imagery to determine the geometry of surface displacements that were caused by induced shocks by satellite radar interferometry. In this research four induced shocks with magnitude M>4.0 was used, which occurred in the Legnica-Glogow Copper District in the Rudna mine. This area is one of the most seismically active places in Poland due to the underground exploitation of copper ore. For calculations, the differential satellite radar interferometry (DInSAR) method was used. The DInSAR technique allowed the determination of surface displacement towards the Line of Sight (LOS) between two images acquired at different times (before and after induced shock) with millimeter accuracy. In the presented research calculations were carried out separately for observations acquired in descending and ascending orbits. The Sentinel-1 satellites are a constellation of two radar satellites that observe the surface of lands and oceans at a time interval of 6 days. Therefore, 6 days, 12 days, 18 days and 24 days were assumed as the time intervals between the images. Vertical displacements were calculated based on the generated LOS displacement maps. In addition, charts of subsidence in the N-S and W-E directions were prepared, 3D models of subsidence were made, and deformation geometry was analyzed for individual shocks. As a result of the research, the spatial extent of deformation in the horizontal surface was determined: N-S and W-E, which in both directions was over 2 km. However, surface displacements caused by induced shocks reached values up to 10 cm.</p>


Kakosa South copper deposit is located about 450km northwest of Lusaka between Chingola and Chililabombwe. A comprehensive study of Kakosa South deposit was carried out. In Kakosa area the footwall aquifer rocks comprising sandstone and conglomerates which are thin and as such are not expected to represent major aquifers. Copper mineralisation is found in the upper quartzite and ore-shale. The inclination of the deposit ranges from 250 up to 350 . The hangingwall formations above the upper quartzite are represented by a sequence of dolomite and shale formations. Based on Kakosa geotechnical analysis and rock mass classification, fuzzy TOPSIS approach was employed for the selection of optimal extraction techniques. FTOPSIS approach has precise and specific quantities which are used in order to establish criteria and option weights. Triangular fuzzy numbers were determined to represent semantic variables. The fuzzy numbers for Kakosa South parameters were used as input data in the decision making model and matched against the criteria required for the mining method. Applying FDM model, extraction techniques were ranked. The results indicated that open pit extraction technique was ranked first with 78.90 scores followed by sublevel stoping with 66.88 scores. It is concluded that the Kakosa South copper ore deposit can optimally be extracted by open pit mining up to transition depth and transit from open pit mining to underground mining employing sublevel stoping.


2018 ◽  
Author(s):  
Michal Feldman ◽  
Eva Fernández-Domínguez ◽  
Luke Reynolds ◽  
Douglas Baird ◽  
Jessica Pearson ◽  
...  

AbstractAnatolia was home to some of the earliest farming communities. It has been long debated whether a migration of farming groups introduced agriculture to central Anatolia. Here, we report the first genome-wide data from a 15,000-year-old Anatolian hunter-gatherer and from seven Anatolian and Levantine early farmers. We find high genetic continuity (∼80-90%) between the hunter-gatherer and early farmers of Anatolia and detect two distinct incoming ancestries: an early Iranian/Caucasus related one and a later one linked to the ancient Levant. Finally, we observe a genetic link between southern Europe and the Near East predating 15,000 years ago that extends to central Europe during the post-last-glacial maximum period. Our results suggest a limited role of human migration in the emergence of agriculture in central Anatolia.


2010 ◽  
Vol 37 (11) ◽  
pp. 2705-2720 ◽  
Author(s):  
Gérard Poupeau ◽  
François-Xavier Le Bourdonnec ◽  
Tristan Carter ◽  
Sarah Delerue ◽  
M. Steven Shackley ◽  
...  

2005 ◽  
Vol 13 (6) ◽  
pp. 8-15 ◽  
Author(s):  
Gerhard O. Sperl

The beginning of metallurgy in the Old World is characterized by hammering native metals such as gold, copper and meteoric iron. Owing to the need of annealing the metal, for softening it after cold working, pyrometallurgy, the use of fire for producing metals from ores, could have been found by trial and error. Parallel to the rise of metallurgy is the use of a campfire (low temperature: max. 800°C) for baking clay-objects, which also seems to be an additional origin of metallurgy. The very first piece of molten copper-ore, dating back to the 7th millennium BC, was found in Catal Hoyiik, Turkey, together with hammered native copper and beads made of galena (PbS), initially mistakenly thought to be metallic lead.


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