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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] |
Magnetic Anomaly
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, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami Magnetic Anomaly -magnetics Map
Temagami, formerly spelled Timagami, is a municipality in northeastern Ontario, Canada, in the Nipissing District with Lake Temagami at its heart. The Temagami region is known as ''n'Daki Menan'', the homeland of the area's First Nations community, most of whom are Anishinaabe (Ojibwe), living on Bear Island. The official name for this group is the Temagami First Nation. However, a larger group that includes these people, plus non-status residents and some non-residents is called the Teme-Augama Anishnabai. Some of the main tourist attractions within the community include old-growth red and white pine, Lake Temagami, Caribou Mountain, fishing, showings of Grey Owl from the 1930s, and over of canoe routes. It is also known as the staging point for cottage vacationing and wilderness canoeing trips on Lake Temagami, in Lady Evelyn-Smoothwater Provincial Park, and vast tracts of wilderness in the area. There are several outfitters here that cater to outdoor activity. The c ... [...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] |
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] |
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] |
Maple Mountain (Ontario)
Maple Mountain is a mountain, located within Lady Evelyn-Smoothwater Provincial Park, Northeastern Ontario, Canada, estimated above mean sea level. It has a higher vertical rise over the surrounding landscape, higher than the Ishpatina Ridge, which is the highest point of land in Ontario rising over Scarecrow Lake. Maple Mountain rises over Tupper Lake and is considerably better known than Ishpatina Ridge. It ranks thirteenth, but when ranked by vertical rise it is the highest of the top 25 peaks in Ontario. The {{cvt, 30, m, ft, -1 fire tower is also still intact and attracts many hikers. A 3.2-kilometre-long hiking trail leads to the abandoned fire tower. Located in Timiskaming District of Northeastern Ontario, the mountain is not very accessible; roads and trails in the remote area are difficult to travel in poor weather. The most popular approach routes to Maple Mountain are by canoe and/or float plane. The indigenous Temagami First Nation call the mountain ''Chee-bay-ji ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudbury Igneous Complex
The Sudbury Igneous Complex is a 1,844 million year-old impact melt sheet in Greater Sudbury, Northern Ontario, Canada. It is part of the Sudbury Basin impact structure, and is classified as a lopolith A lopolith is a large igneous intrusion which is lenticular in shape with a depressed central region. Lopoliths are generally concordant with the intruded strata with dike or funnel-shaped feeder bodies below the body. The term was first defined .... ReferencesSignificance Of Back-To-Back Facing Directions Along The South Range Of The Sudbury Igneous Complex, Ontario Geology of Greater Sudbury Igneous petrology of Ontario Paleoproterozoic magmatism {{NorthernOntario-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orders Of Magnitude (magnetic Field)
This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude. The magnetic flux density does not measure how strong a magnetic field is, but only how strong the magnetic flux is in a given point or at a given distance (usually right above the magnet's surface). For the ''intrinsic'' order of magnitude of magnetic fields, see: Orders of magnitude (magnetic moment). Note: * Traditionally, the magnetizing field, H, is measured in amperes per meter. * Magnetic induction B (also known as magnetic flux density) has the SI unit tesla or Wb/m2 * One tesla is equal to 104 gauss. * Magnetic field drops off as the inverse cube of the distance from a dipole source. * Energy required to produce laboratory magnetic fields increases with the square of magnetic field. Examples These examples attempt to make the measuring point clear, usually the surface of the item mentioned. References See also * Orders o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Precambrian Research
''Precambrian Research'' is a peer-reviewed scientific journal covering the geology of the Earth and its planetary neighbors. It is published by Elsevier and, , the editor-in-chief is V. Pease (Stockholm University). It was established in 1974. According to the ''Journal Citation Reports'', the journal has a 2022 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 3.8. References External links * Geology journals Elsevier academic journals English-language journals Academic journals established in 1974 {{geology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temagami Greenstone Belt
The Temagami Greenstone Belt (TGB) is a small 2.7 billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earth's lithosphere that forms the core of the North American continent and Canadian Shield. The belt is composed of metamorphosed volcanic rocks that range in composition from basalt to rhyolite. These form the east-northeast trend of the belt and are overlain by metamorphosed sedimentary rocks. They were created during several volcanic episodes involving a variety of eruptive styles ranging from passive lava eruptions to viscous explosive eruptions. Part of the Canadian Shield, the TGB contains some of the oldest known rocks on Earth. The belt is made up of a number of geologic features such as batholiths, stocks, dikes, volcanic complexes, layered intrusions and deformation zones. These are situated in several geographical townships in the municipality of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadian Shield
The Canadian Shield ( ), also called the Laurentian Shield or the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the ancient geologic core of the North American continent. Glaciation has left the area with only a thin layer of soil, through which exposures of igneous bedrock resulting from its long volcanic history are frequently visible. As a deep, common, joined bedrock region in eastern and central Canada, the shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada and most of Greenland; it also extends south into the northern reaches of the continental United States. Geographical extent The Canadian Shield is a physiographic division comprising four smaller physiographic provinces: the Laurentian Upland, Kazan Region, Davis and James. The shield extends into the United States as the Adirondack Mountains ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudbury Basin
The Sudbury Basin (), also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geology, geological structure in Ontario, Canada. It is among the oldest- and largest-known List of impact structures on Earth, impact structures on Earth. The structure, the eroded remnant of an Impact structure, impact crater, was formed by the impact of an asteroid 1.849 billion years ago in the Paleoproterozoic era. The ores of the Sudbury Basin are known to contain nickel, copper, gold, silver, platinum, palladium, rhodium, iridium, and ruthenium. The basin is located on the Canadian Shield in the city of Greater Sudbury, Ontario. The former municipalities of Rayside-Balfour, Valley East and Capreol lie within the Sudbury Basin, which is referred to locally as "The Valley". The urban core of the former city of Sudbury lies on the southern outskirts of the basin. An Ontario Historical Plaque was erected by the province to commemorate the discovery of the Sudbury Basin. Format ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
