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Kursk Magnetic Anomaly
The Kursk Magnetic Anomaly () is recognized as the largest magnetic anomaly on Earth. It is a territory rich in iron ores located within the Kursk, Belgorod, and Voronezh oblasts in Russia, and constitutes a significant part of the Central Black Earth Region. The Kursk Magnetic Anomaly (KMA) was first discovered in 1773 by the Russian astronomer and academic Pyotr Inokhodtsev while preparing the maps of the General Land Survey () at the behest of the Russian government. It was not investigated again until 1874 when I. N. Smirnov conducted the first geomagnetic survey of European Russia. In 1883, N. D. Pilchikov, an assistant professor at Kharkiv University, conducted a series of 71 observations of the Kursk Magnetic Anomaly. These revealed a much larger extent than previously measured and for the first time attributed the anomaly to the presence of iron ore. In 1884, on the basis of this discovery, Pilchikov was awarded the silver medal of the Russian Geographical Society. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Map Of Russia - Black Earth
A map is a symbolic depiction of interrelationships, commonly spatial, between things within a space. A map may be annotated with text and graphics. Like any graphic, a map may be fixed to paper or other durable media, or may be displayed on a transitory medium such as a computer screen. Some maps change interactively. Although maps are commonly used to depict geographic elements, they may represent any space, real or fictional. The subject being mapped may be two-dimensional such as Earth's surface, three-dimensional such as Earth's interior, or from an abstract space of any dimension. Maps of geographic territory have a very long tradition and have existed from ancient times. The word "map" comes from the , wherein ''mappa'' meant 'napkin' or 'cloth' and ''mundi'' 'of the world'. Thus, "map" became a shortened term referring to a flat representation of Earth's surface. History Maps have been one of the most important human inventions for millennia, allowing humans t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granitoids
A granitoid is a broad term referring to a diverse group of coarse-grained igneous rocks that are widely distributed across the globe, covering a significant portion of the Earth's exposed surface and constituting a large part of the continental crust. These rocks are primarily composed of quartz, plagioclase, and alkali feldspar. Granitoids range from plagioclase-rich tonalites to alkali-rich syenites and from quartz-poor monzonites to quartz-rich quartzolites. As only two of the three defining mineral groups (quartz, plagioclase, and alkali feldspar) need to be present for the rock to be called a granitoid, foid-bearing rocks, which predominantly contain feldspars but no quartz, are also granitoids. Nomenclature and classification The terms ''granite'' and ''granitic rock'' are often used interchangeably for granitoids; however, granite is just one particular type of granitoid. Granitoids are diverse. No classification system for granitoids can give a complete and unique ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geography Of Kursk Oblast
Kursk Oblast (, ) is a federal subjects of Russia, federal subject of Russia (an oblast). Its administrative center is the types of inhabited localities in Russia, city of Kursk. As of the 2021 Russian census, 2021 census, Kursk Oblast had a population of 1,082,458. History The territory of Kursk Oblast has been populated since the end of the Last Glacial Period, last ice age. Slavic tribes of the Severians inhabited the area. From 830 the current Kursk Oblast was part of the Rus' Khaganate and Kievan Rus' states. The oldest towns in the region are Kursk and Rylsk, Russia, Rylsk, first mentioned in 1032 and 1152, respectively, both capitals of small medieval eponymous duchies. In the 13th century, the region was Mongol invasion of Kievan Rus', conquered by the Mongol Empire. In the 15th century it was part of the Grand Duchy of Lithuania under the Jagiellonian dynasty. It was lost in the 16th-century Muscovite–Lithuanian Wars to the Grand Duchy of Moscow. A real growth of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Anomalies
In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation (geomagnetic reversals) in successive bands of ocean floor parallel with mid-ocean ridges was important evidence for seafloor spreading, a concept central to the theory of plate tectonics. Measurement Magnetic anomalies are generally a small fraction of the magnetic field. The total field ranges from 25,000 to 65,000 nanoteslas (nT). To measure anomalies, magnetometers need a sensitivity of 10 nT or less. There are three main types of magnetometer used to measure magnetic anomalies: # The fluxgate magnetometer was developed during World War II to detect submarines. It measures the component along a particular axis of the sensor, so it needs to be oriented. On land, it is often oriented vertically, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining In Russia
The mineral industry of Russia is one of the world's leading mineral industries and accounts for a large percentage of the Commonwealth of Independent States' production of a range of mineral products, including metals, industrial minerals, and mineral fuels. In 2005, Russia ranked among the leading world producers or was a significant producer of a vast range of mineral commodities, including aluminum, arsenic, cement, copper, magnesium compounds and metals, nitrogen, palladium, silicon, nickel and vanadium.Richard M. Levine and Glenn J. Wallace"The Mineral Industries of the Commonwealth of Independent States". ''2005 Minerals Yearbook''. U.S. Geological Survey (December 2007). ''This article incorporates text from this U.S. government source, which is in the public domain. In 2005, the Russian economy benefited significantly from high oil, gas, and metal prices. Oil revenues accounted for about 14% of the gross domestic product. Following the mineral fuel industry, the next lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of European Russia
Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology. It is integrated with Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface and the processes that have shaped that structure. Geologists study the mineralogical composition of rocks in order to get insight into their history of formation. Geology determines the relative ages of rocks found at a given location; geochemistry (a branch of geology) determines their absolute ages. By combining various petrological, crystallographic, and paleontological tools, geologists are able to chronicle the geological history of the Earth as a whole. One aspect is to demonstrate the age of the Earth. Geology provides evidence for plate tectonics, the evolutionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exploration Geophysics
Exploration geophysics is an applied branch of geophysics and economic geology, which uses physical methods at the surface of the Earth, such as seismic, gravitational, magnetic, electrical and electromagnetic, to measure the physical properties of the subsurface, along with the anomalies in those properties. It is most often used to detect or infer the presence and position of economically useful geological deposits, such as ore minerals; fossil fuels and other hydrocarbons; Geothermal energy, geothermal reservoirs; and groundwater reservoirs. It can also be used to detect the presence of unexploded ordnance. Exploration geophysics can be used to directly detect the target style of mineralization by measuring its physical properties directly. For example, one may measure the density contrasts between the dense iron ore and the lighter silicate host rock, or one may measure the electrical conductivity contrast between conductive sulfide minerals and the resistive silicate host roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ishpatina Ridge
Ishpatina Ridge is the highest point of land in the Canadian province of Ontario, at an estimated above sea level. Ishpatina Ridge rises approximately above the immediate area. It was only truly recognized as Ontario's highest point after topographical mapping by the Government of Canada revealed this fact in the 1970s. Before then, the more popular Maple Mountain was thought to be higher. The ridge lies in Lady Evelyn-Smoothwater Provincial Park. Due to its remote location, Ishpatina Ridge is a challenge to reach. The closest major highway, Highway 560, is more than 30 km north. There are a few logging roads and trails in the remote area, but they are difficult to travel in poor weather. The most popular approach route to Ishpatina is by canoe/portage via a logging road to the south out of the town of Capreol north of Sudbury. While a northern route exists (out of Gowganda, the nearest community), there are numerous portages making it particularly onerous. This route ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami Magnetic Anomaly
The Temagami Magnetic Anomaly, also called the Temagami Anomaly or the Wanapitei Anomaly, is a magnetic anomaly resulting from a large buried geologic structure in the Canadian Shield near Temagami, Ontario, Canada. It stretches from Lake Wanapitei in the west to Bear Island (Lake Temagami), Bear Island in Lake Temagami. The Aboriginal community of Teme-Augama Anishnabai lies partly within the Temagami Magnetic Anomaly, including the Temagami First Nation on Bear Island. Located nearby are a number of other geological structures, including the Sudbury Basin, the Lake Wanapitei, Lake Wanapitei impact crater, and the Temagami Greenstone Belt. Discovery and structure The Temagami Magnetic Anomaly is egg-shaped, long and wide. The central section has the greatest amplitude and an east–west strike. The Temagami Magnetic Anomaly was first found in the late 1940s during a magnetic survey by Norman Bell Keevil. The western portion appears smoother in character while the eastern sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangui Magnetic Anomaly
The Bangui magnetic anomaly is a local variation in the Earth's magnetic field centered at Bangui, the capital of the Central African Republic. The magnetic anomaly is roughly elliptical, about , and covers most of the country, making it one of the "largest and most intense crustal magnetic anomalies on the African continent". The anomaly was discovered in the late 1950s, explored in the 1970s, and named in 1982. Its origin remains unclear. History In 1962, Raymond Godivier and Lucien Le Donche reported on a magnetic anomaly in the Central African Republic, which they identified by analyzing their surface magnetic activity data of 1956. These results were confirmed and built upon by the high-altitude aeromagnetic surveys carried out by the US Naval Oceanographic Office, as well as by the satellite measurements conducted in 1964 with Cosmos 49 and in the 1970s with the Orbiting Geophysical Observatory at altitudes. This data was combined in 1973 and yielded a spatial map of Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoilensky GOK
OJSC Stoilensky GOK is an iron ore company in Russia. Its main facility, the Stoilensky Mining and Beneficiation Plant (SGОК), is located in Stary Oskol, in the Belgorod region. Stoilensky is associated with Novolipetsk Steel and accounts for roughly 16% of Russia's iron ore production. Stoilensky GOK is listed in the MICEX and RTS exchanges in Russia. Operations The Stoilensk deposit is in the northeastern part of the Kursk Magnetic Anomaly. The company's mine is confirmed to have reserves of 26.6 million tons of high-grade iron ore Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the f ... and 1.4 billion tons of ferruginous quartzite. References External linksOJSC Stoilensky ROKStoilensky GOK at Novolipetsk Steel{{in lang, en Mining companies of Russia Iron ore mining co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground Mining
Mining is the extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes, veins, seams, reefs, or placer deposits. The explo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
