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Ashalim (archaeological Site)
''Ashalim'' is one of four metallurgical sites investigated by Ezra Ben-Yosef in his 2008 study of the Arabah Valley (the others being ''‘Ein Yahav'', ''Giv’at Hazeva'', and ''Khirbat Hamra Ifdan''). His attempt to place the four copper production sites in a chrono-cultural context using archaeomagnetic dating was noted for its metallurgical significance. Geographical '' '' The Arabah Valley is located in Jordan and Israel west of Mount Sodom, 40 kilometers northwest of the Faynan copper-ore district. ''Ashalim'' was discovered in 1964 by a research team led by Yoram Tsafrir and is believed to be associated with the Faynan ore deposits, as the nearest significant source of ore was over 100 kilometers away. In 2002, Y. Israel re-surveyed the site. Ben-Yosef's study's main goal was to place four copper production sites of the Arabah Valley in their chrono-cultural context. The information gathered through archaeomagnetic dating provides insight into this region's copper pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arabah
The Arabah, Araba or Aravah ( he, הָעֲרָבָה, ''hāʿĂrāḇā''; ar, وادي عربة, ''Wādī ʿAraba''; lit. "desolate and dry area") is a loosely defined geographic area south of the Dead Sea basin, which forms part of the border between Israel to the west and Jordan to the east. The old meaning, which was in use up to the early 20th century, covered almost the entire length of what today is called the Jordan Rift Valley, running in a north–south orientation between the southern end of the Sea of Galilee and the northern tip of the Gulf of Aqaba of the Red Sea at Aqaba– Eilat. This included the Jordan River Valley between the Sea of Galilee and the Dead Sea, the Dead Sea itself, and what today is commonly called the Arava Valley. The contemporary use of the term is restricted to this southern section alone. Geography The Arabah is in length, from the Gulf of Aqaba to the southern shore of the Dead Sea. Topographically, the region is divided into three se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Remanent Magnetization
Natural remanent magnetization (NRM) is the permanent magnetism of a rock or sediment. This preserves a record of the Earth's magnetic field at the time the mineral was laid down as sediment or crystallized in magma and also the tectonic movement of the rock over millions of years from its original position. Natural remanent magnetization forms the basis of paleomagnetism and magnetostratigraphy. Types There are several kinds of NRM that can occur in a sample. Many samples have more than one kind superimposed. Thermoremanent magnetization (TRM) is acquired during cooling through the Curie temperature of the magnetic minerals and is the best source of information on the past Earth's field. Magnetization formed by phase change, chemical action or growth of crystals at low temperature is called chemical remanent magnetization. Sediments acquire a ''depositional remanent magnetization'' during their formation or a ''post-depositional remanent magnetization'' afterwards. Some kinds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mining
Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining operations, the ore must usually be beneficiated (concentrated). The processing techniques depend on the nature of the ore. If the ore is primarily sulfide copper minerals (such as chalcopyrite), the ore is crushed and ground to liberate the valuable minerals from the waste ('gangue') minerals. It is then concentrated using mineral flotation. The concentrate is typically sold to distant smelters, although some large mines have smelters located nearby. Such colocation of mines and smelters was more typical in the 19th and early 20th centuries, when smaller smelters could be economic. The sulfide concentrates are typically smelted in such furnaces as the Outokumpu or I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeological Sites In Jordan
Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for learning about prehistoric societies, for which, by definition, there are no written records. Prehistory includes over 99% of the human past, from the Paleolithic until the advent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatolia
Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The region is bounded by the Turkish Straits to the northwest, the Black Sea to the north, the Armenian Highlands to the east, the Mediterranean Sea to the south, and the Aegean Sea to the west. The Sea of Marmara forms a connection between the Black and Aegean seas through the Bosporus and Dardanelles straits and separates Anatolia from Thrace on the Balkan peninsula of Southeast Europe. The eastern border of Anatolia has been held to be a line between the Gulf of Alexandretta and the Black Sea, bounded by the Armenian Highlands to the east and Mesopotamia to the southeast. By this definition Anatolia comprises approximately the western two-thirds of the Asian part of Turkey. Today, Anatolia is sometimes considered to be synonymous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taurus Mountains
The Taurus Mountains (Turkish language, Turkish: ''Toros Dağları'' or ''Toroslar'') are a mountain range, mountain complex in southern Turkey, separating the Mediterranean Region, Turkey, Mediterranean coastal region from the central Anatolia#Anatolian plateau, Anatolian Plateau. The system extends along a curve from Lake Eğirdir in the west to the upper reaches of the Euphrates and Tigris rivers in the east. It is a part of the Alpide belt in Eurasia. Etymology The mountain range under the current name was mentioned in The Histories (Polybius), ''The Histories'' by Polybius as Ταῦρος (''Taûros''). Heinrich Kiepert writes in ''Lehrbuch der alten Geographie'' that the name was borrowed into Ancient Greek from the Semitic languages, Semitic (Old Aramaic) root טורא ''ṭūrā'', meaning "mountain". Geography The Taurus mountains are divided into three chains from west to east as follows; * Western Taurus (Batı Toroslar) *Central Taurus (Orta Toroslar) *Southeaster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead Ore
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the group, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalcolithic
The Copper Age, also called the Chalcolithic (; from grc-gre, χαλκός ''khalkós'', " copper" and ''líthos'', " stone") or (A)eneolithic (from Latin ''aeneus'' "of copper"), is an archaeological period characterized by regular human manipulation of copper, but prior to the discovery of bronze alloys. Modern researchers consider the period as a subset of the broader Neolithic, but earlier scholars defined it as a transitional period between the Neolithic and the Bronze Age. The archaeological site of Belovode, on Rudnik mountain in Serbia, has the world's oldest securely dated evidence of copper smelting at high temperature, from (7000 BP). The transition from Copper Age to Bronze Age in Europe occurred between the late 5th and the late In the Ancient Near East the Copper Age covered about the same period, beginning in the late and lasting for about a millennium before it gave rise to the Early Bronze Age. Terminology The multiple names resu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
Lead is a chemical element with the Symbol (chemistry), symbol Pb (from the Latin ) and atomic number 82. It is a heavy metals, heavy metal that is density, denser than most common materials. Lead is Mohs scale of mineral hardness#Intermediate hardness, soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable nuclide, stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and base (chemistry), bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slag
Slag is a by-product of smelting ( pyrometallurgical) ores and used metals. Broadly, it can be classified as ferrous (by-products of processing iron and steel), ferroalloy (by-product of ferroalloy production) or non-ferrous/ base metals (by-products of recovering non-ferrous materials like copper, nickel, zinc and phosphorus). Within these general categories, slags can be further categorized by their precursor and processing conditions (e.g., Blast furnace (BF) slags, air-cooled blast furnace (ACBF) slag, basic oxygen furnace (BOF) slag, and electric arc furnace (EAF) slag) . Due to the large demand for these materials, slag production has also significantly increased throughout the years despite recycling (most notably in the iron and steelmaking industries) and upcycling efforts. The World Steel Association (WSA) estimates that 600 kg of by-products (~90 wt% is slags) are generated per tonne of steel produced. Composition Slag is usually a mixture of metal oxides and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ein Yahav
Ein Yahav ( he, עֵין יַהַב) is a moshav in Israel. Located 100 m below sea level in the northern Arava, 12 km south of Hatzeva and between the Yahav and Nikrot streams, it falls under the jurisdiction of the Central Arava Regional Council. In it has a population of . Etymology Moshav Ein Yahav is named after the Yahav Spring, located southwest of the moshav. History In 1950, an agricultural experimentation station was set up at Ein Yahav by members of Shahal, a movement to settle arid areas of Israel. The station was abandoned and on 7 October 1953, Israel Defense Forces veterans settled there. In 1959 a Nahal settlement Nahal settlements ( he, היאחזות נח"ל, ''Heahzut Nahal'') were settlements established by Nahal soldiers in Israel and Israeli-occupied territories. Supporting Jewish settlement growth and expansion throughout Israel was once the main f ... was established 5 km to the east of the original. In 1962 it was civilianized by senio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeomagnetic Dating
Archaeomagnetic dating is the study and interpretation of the signatures of the Earth's magnetic field at past times recorded in archaeological materials. These paleomagnetic signatures are fixed when ferromagnetic materials such as magnetite cool below the Curie point, freezing the magnetic moment of the material in the direction of the local magnetic field at that time. The direction and magnitude of the magnetic field of the Earth at a particular location varies with time, and can be used to constrain the age of materials. In conjunction with techniques such as radiometric dating, the technique can be used to construct and calibrate the geomagnetic polarity time scale. This is one of the dating methodologies used for sites within the last 10,000 years. The method was conceived by E. Thellier in the 1930s and the increased sensitivity of SQUID magnetometers has greatly promoted its use. Instances of use The Earth's magnetic field has two main components. The stronger componen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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