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Iberian Pyrite Belt
The Iberian Pyrite Belt is a vast geographical area with particular geological features that stretches along much of the south of the Iberian Peninsula, from Portugal to Spain. It is about 250 km long and 30–50 km wide, running northwest to southeast from Alcácer do Sal (Portugal) to Sevilla (Spain). The mining activity in this region goes back thousands of years. The Iberian Pyrite Belt has had more than 2000 million tons of ore and still has more than 400 million left to exploit. It is the largest concentration of massive sulfides in the world. Formation The Iberian Pyrite Belt was formed 350 million years ago in the Devonian Period, connected to active and hydrothermal volcanism that led to the formation of a volcanic-sedimentary complex. Volcanic activity in the region led to eight giant volcanogenic massive sulfide ore deposits (VMS) associated with polymetallic massive flanks of volcanic cones in the form of pyrite, and also chalcopyrite, sphalerite, galena and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IPB Zone
IPB can refer to one of the following: *Bogor Agricultural University (''Institut Pertanian Bogor''), an agricultural institute in Indonesia *Intelligence preparation of the battlespace, US Field Manual FM 3.05-301 *International Peace Bureau *Investiční a poštovní banka, Czech bank *Invision Power Board * UK Investigatory Powers Bill *Isolated-phase bus *Italian Peoples Bakery, a bakery based in Trenton, New Jersey *Leibniz Institute of Plant Biochemistry, research institute in Halle, Germany *Presbyterian Church of Brazil The Presbyterian Church of Brazil (Portuguese: ''Igreja Presbiteriana do Brasil'', or ''IPB'') is an Evangelical Protestant Christian denomination in Brazil. Oldest of the Reformed family of Protestantism in Brazil. It is the largest Presbyter ... (''Igreja Presbiteriana do Brasil''), a Brazilian Protestant church * UPLB Institute of Plant Breeding at the University of the Philippines, Los Baños * IPB compression, a method of video compression using I- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roman Empire
The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Republican period of ancient Rome. As a polity, it included large territorial holdings around the Mediterranean Sea in Europe, North Africa, and Western Asia, and was ruled by emperors. From the accession of Caesar Augustus as the first Roman emperor to the military anarchy of the 3rd century, it was a Principate with Italia as the metropole of its provinces and the city of Rome as its sole capital. The Empire was later ruled by multiple emperors who shared control over the Western Roman Empire and the Eastern Roman Empire. The city of Rome remained the nominal capital of both parts until AD 476 when the imperial insignia were sent to Constantinople following the capture of the Western capital of Ravenna by the Germanic barbarians. The adoption of Christianity as the state church of the Roman Empire in AD 380 and the fall of the Western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadiana River
The Guadiana River (, also , , ), or Odiana, is an international river defining a long stretch of the Portugal-Spain border, separating Extremadura and Andalusia (Spain) from Alentejo and Algarve (Portugal). The river's basin extends from the eastern portion of Extremadura to the southern provinces of the Algarve; the river and its tributaries flow from east to west, then south through Portugal to the border towns of Vila Real de Santo António (Portugal) and Ayamonte (Spain), where it flows into the Gulf of Cádiz. With a course that covers a distance of , it is the fourth-longest in the Iberian peninsula, and its hydrological basin extends over an area of approximately (the majority of which lies within Spain). Etymology The Romans referred to the river as the , the "River of Ducks". During the Moorish occupation and settlement, the name was extended and referred to as ''Wadi Ana'' (''wādī'' being the Arab term for "river"), later passed on to Portuguese and Spanish settle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mértola
Mértola () is a municipality in southeastern Portuguese Alentejo near the Spanish border. In 2011, the population was 7,274, in an area of approximately : it is the sixth-largest municipality in Portugal. Meanwhile, it is the second-lowest population centre by density with approximately 5.62 persons/ (second to the adjacent Alcoutim). The seat of the municipality is the town of Mértola, which has around 2800 inhabitants (2011), located on a hill over the Guadiana River. Its strategic location made it an important fluvial commercial port in Classical Antiquity, through the period of Umayyad conquest of Hispania: Mértola's main church (the Church of Nossa Senhora da Anunciação) was the only medieval mosque to have survived the period in Portugal. In 2017 Mértola started the process to become a UNESCO World Heritage Site. History Romans Mértola was inhabited at least since the Iron Age at least by Conni and Cynetes settlements, was influenced by the Phoenicians and finally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aljustrel
Aljustrel () is a town and a municipality in the Portuguese district of Beja. The population in 2011 was 9,257, in an area of 458.47 km2. The present mayor is Nelson Domingos Brito, elected by the Socialist Party. The municipal holiday is June 13. History During the Roman era, Aljustrel was known as ''Metallum Vispascense''. It was occupied by the Moors but in 1235 the town was conquered from them by King D. Sancho II. The first foral (''charter'') was only conceded by King Sancho in 1252. A new foral was issued on 20 September 1510, by King D. Manuel I. On 28 January 2013, the civil parishes of Aljustrel and Rio dos Minhos were aggregated into one local authority called Aljustrel (Decree 11-A/2013, Diário da República, Série 1, 19). Geography Administratively, the municipality is divided into 4 civil parishes: * Aljustrel e Rio de Moinhos * Ervidel * Messejana * São João de Negrilhos International relations Aljustrel is twinned with: * Hem, in the département of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aljustrel Mine
The Mines of Aljustrel ( pt, Minas de Aljustel) is a zinc/lead mine situated in the civil parish of Aljustrel e Rio de Moinhos, in the municipality of Aljustrel, in the Portuguese Alentejo district of Beja. It was classified as a monument in 1982. History With more than 80 known deposits, the Iberian Pyrite Belt became an area of intensive mining of sulphide ore since the Chalcolithic era.J.M. Leistel et al (1998), p.3 The Aljustrel camp consists of six separate orebodies (Estação, Feitais, Algares, Moinho, São João and Gavião) that lie on the limbs of four main SWverging folds: the Feitais anticline (towards the northeast), the Central anticline, the São João sincline and the southwestern anticline.Jorge M.R.S. Relvas et al (2011), p.72 The Aljustrel Group structures are truncated and rejected by a major northeast-southwest fault (the Messejana fault). It terminates in the northwest with a hidden by tertiary cover and constitutes the Paleozoic basement where the main two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Tinto (river)
The Río Tinto (, ''red river'' or Tinto River) is a river in southwestern Spain that rises in the Sierra Morena mountains of Andalusia. It flows generally south-southwest, reaching the Gulf of Cádiz at Huelva. The Rio Tinto river has a unique red and orange colour derived from its chemical makeup that is extremely acidic and with very high levels of iron and heavy metals. The river maintains its colour for an approximate length of 50 kilometres. After the 50 kilometre mark, the chemistry that makes the Rio Tinto river so unique appears to slowly decline, as does the odd colouring. The location where the chemistry of the river is altered is near a town called Niebla. The river's chemistry begins to significantly change following the town of Niebla owing to the fact that the Rio Tinto blends itself with other streams that are connected to the Atlantic Ocean. The river is approximately long and is located within the Iberian Pyrite Belt. This area has large amounts of ore and sul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron
Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in front of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. In its metallic state, iron is rare in the Earth's crust, limited mainly to deposition by meteorites. Iron ores, by contrast, are among the most abundant in the Earth's crust, although extracting usable metal from them requires kilns or furnaces capable of reaching or higher, about higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BCE and the use of iron tools and weapons began to displace copper alloys, in some regions, only around 1200 BCE. That event is considered the transition from the Bronze Age to the Iron A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
