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Pogo Mine
The Pogo mine is a gold mine in the state of Alaska. By 31 December 2017 Pogo had produced 3.6 million ounces of gold at a grade of 13.6 g/t. Annual production for 2020 was 205,878 ounces. At 31 December 2019 the mine had Proven and Probable Reserves of 1.5 million ounces of gold at a grade of 7.5 g/t (JORC). It is located northeast of Delta Junction and east of Fairbanks. Northern Star Resources Ltd announced in May 2020 that it had entered into an agreement with the Japan based Sumitomo Metal Mining Co and Sumitomo Corp to acquire the Pogo Gold mine. Orebody and mining method The orebody consists of numerous highly irregular quartz veins, ranging in thickness from with being typical, and ranging in dip from horizontal to vertical with 30-45 degrees being normal. A complex system of faulting offsets the veins both parallel and perpendicular to the strike, resulting in a "chopped-up" orebody. Until 2019 the mine utilized drift-and-fill and overhand cut-and-fill mining m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta Junction, Alaska
Delta Junction ( uk, Делта-Джанкшен, Delta Dzhankshen) is a city in the Southeast Fairbanks Census Area, Alaska, United States. As of the 2010 census, the population was 958, up from 840 in 2000. The 2018 estimate was down to 931. The city is located a short distance south of the confluence of the Delta River with the Tanana River, which is at Big Delta. It is about south of Fairbanks. Native inhabitants are Tanana Athabaskans. History For at least 10,000 years, Athabascan indigenous peoples have inhabited portions of the interior of Alaska. Early inhabitants survived by hunting and fishing. The early history of non-native settlement in the area occurred at the river crossing at Big Delta and is found at the entry, Big Delta, Alaska. In 1904, the town first served as a telegraph station. In 1928, a herd of 23 bison were brought from the National Bison Range in Montana to an area south of Big Delta to provide an additional game species for hunters. Buffalo C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., it borders the Canadian province of British Columbia and the Yukon territory to the east; it also shares a maritime border with the Russian Federation's Chukotka Autonomous Okrug to the west, just across the Bering Strait. To the north are the Chukchi and Beaufort Seas of the Arctic Ocean, while the Pacific Ocean lies to the south and southwest. Alaska is by far the largest U.S. state by area, comprising more total area than the next three largest states (Texas, California, and Montana) combined. It represents the seventh-largest subnational division in the world. It is the third-least populous and the most sparsely populated state, but by far the continent's most populous territory located mostly north of the 60th parallel, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Star Resources
Northern Star Resources is an Australian gold mining company with operations in Western Australia, Northern Territory and Alaska. History Northern Star Resources (NSR) was founded in December 2003 to search for and develop ore deposits in the East Kimberley region of Western Australia. It was listed on the Australian Securities Exchange in December 2003. In July 2010, it became a gold miner with the purchase of Paulsens Gold Mine. In October 2020, a merger between NSR and Saracen Metal Holdings, its joint venture partner in the Super Pit gold mine, was proposed. The merger was completed in February 2021 when Saracen was de-listed from the Australian Securities Exchange. Operations Current *Carosue Dam Gold Mine (4 underground mines: Karari, Whirling Dervish, Porphyry 45 km north and Deep South mine 70 km to the North) *Thunderbox Gold Mine (1 underground mine: Thunderground & 2 Open Pit Mines) * Jubilee Gold Mine * Jundee Gold Mine * Kanowna Belle Gold Mine *Paulsens Gold Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineral Resource Classification
There are several classification systems for the economic evaluation of mineral deposits worldwide. The most commonly used schemes base on the International Reporting Template, developed by the CRIRSCO - Committee for Mineral Reserves International Reporting Standards, like the Australian Joint Ore Reserves Committee - JORC Code 2012, the Pan-European Reserves & Resources Reporting Committee' – PERC Reporting Standard from 2021, the Canadian Institute of Mining, Metallurgy and Petroleum - CIM classification and the South African Code for the Reporting of Mineral Resources and Mineral Reserves (SAMREC). A more detailed description of the historical development concerning reporting about mineral deposits can be found on the PERC web site. Mineral resources A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that there are reasonable prospects for eventual economic extraction. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JORC
There are several classification systems for the economic evaluation of mineral deposits worldwide. The most commonly used schemes base on the International Reporting Template, developed by the CRIRSCO - Committee for Mineral Reserves International Reporting Standards, like the Australian Joint Ore Reserves Committee - JORC Code 2012, the Pan-European Reserves & Resources Reporting Committee' – PERC Reporting Standard, PERC Reporting Standard from 2021, the Canadian Institute of Mining, Metallurgy and Petroleum - CIM classification and the South African Mineral Reporting Codes, South African Code for the Reporting of Mineral Resources and Mineral Reserves (SAMREC). A more detailed description of the historical development concerning reporting about mineral deposits can be found on the PERC web site. Mineral resources A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairbanks
Fairbanks is a home rule city and the borough seat of the Fairbanks North Star Borough in the U.S. state of Alaska. Fairbanks is the largest city in the Interior region of Alaska and the second largest in the state. The 2020 Census put the population of the city proper at 32,515, and the population of the Fairbanks North Star Borough at 95,655 making it the second most populous metropolitan area in Alaska after Anchorage. The Metropolitan Statistical Area encompasses all of the Fairbanks North Star Borough and is the northernmost Metropolitan Statistical Area in the United States, located by road ( by air) south of the Arctic Circle. Fairbanks is home to the University of Alaska Fairbanks, the founding campus of the University of Alaska system. History Native American presence Athabascan peoples have used the area for thousands of years, although there is no known permanent Alaska Native settlement at the site of Fairbanks. An archaeological site excavated o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cut And Fill
In earthmoving, cut and fill is the process of constructing a railway, road or canal whereby the amount of material from cuts roughly matches the amount of fill needed to make nearby embankments to minimize the amount of construction labor. Overview Cut sections of roadway or rail are areas where the roadway has a lower elevation than the surrounding terrain. Fill sections are elevated sections of a roadway or trackbed. Cut and fill takes material from cut excavations and uses this to make fill sections. It costs resources to excavate material, relocate it, and to compact and otherwise prepare the filled sections. The technique aims to minimise the effort of relocating excavated material while also taking into account other constraints such as maintaining a specified grade over the route. Other considerations In addition to minimising construction cost, other factors influence the placement of cut or filled sections. For example, air pollutants can concentrate in the valle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stoping
Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping is used when the country rock is sufficiently strong not to collapse into the stope, although in most cases artificial support is also provided. The earliest forms of stoping were conducted with hand tools or by fire-setting; later gunpowder was introduced. From the 19th century onward, various other explosives, power-tools, and machines came into use. As mining progresses the stope is often backfilled with tailings, or when needed for strength, a mixture of tailings and cement. In old mines, stopes frequently collapse at a later time, leaving craters at the surface. They are an unexpected danger when records of underground mining have been lost with the passage of time. Stoping is considered "productive work", and is contrasted with "deadwork", the work required merely to access the mineral deposit, such as sinking shafts and winz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moose
The moose (in North America) or elk (in Eurasia) (''Alces alces'') is a member of the New World deer subfamily and is the only species in the genus ''Alces''. It is the largest and heaviest extant species in the deer family. Most adult male moose have distinctive broad, palmate ("open-hand shaped") antlers; most other members of the deer family have antlers with a dendritic ("twig-like") configuration. Moose typically inhabit boreal forests and temperate broadleaf and mixed forests of the Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the Equator. For other planets in the Solar System, north is defined as being in the same celestial hemisphere relative to the invariable plane of the solar system as Earth's Nort ... in temperate to subarctic climates. Hunting and other human activities have caused a reduction in the size of the moose's range over time. It has been reintroduced to some of its former habitats. Currently, most moose occ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
