|
Nevado De Longaví
Nevado de Longaví is a volcano in the Andes of central Chile. The high volcano lies in the Linares Province, which is part of the Maule Region. It features a summit crater and several parasitic vents. The volcano is constructed principally from lava flows. Two collapses of the edifice have carved collapse scars into the volcano, one on the eastern slope known as Lomas Limpias and another on the southwestern slope known as Los Bueye. The volcano features a glacier and the Achibueno River, Achibueno and Rio Blanco (Maule), Blanco rivers originate on the mountain. The oldest volcanic activity occurred one million years ago. After a first phase characterized by the production of basaltic andesite, the bulk of the edifice was constructed by Andesite, andesitic lava flows. The volcanic rock that makes up Nevado de Longaví features an unusual magma chemistry that resembles adakite (having geochemical characteristics of magma thought to have formed by partial melting of altered basalt t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Partial Melting
Partial melting occurs when only a portion of a solid is melted. For mixed substances, such as a rock containing several different minerals or a mineral that displays solid solution, this melt can be different from the bulk composition of the solid. Partial melting occurs where the solidus and liquidus temperatures are different. For single minerals this can happen when they exhibit solid solution, for example in olivines between iron and magnesium. In rocks made up of several different minerals, some will melt at lower temperatures than others. Partial melting of the mantle Melting in the mantle requires one of three possible events to occur: an increase in temperature, a decrease in pressure, or the addition of volatiles to the system (a change in composition). Temperature In the case of raising the temperature, mantle melting will only occur if the mantle is heated past the normal geotherm. It is believed that heat flux from the core and lower mantle is responsible for incr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Volcanic Zone
The Andean Volcanic Belt is a major volcanic belt along the Andean cordillera in Argentina, Bolivia, Chile, Colombia, Ecuador, and Peru. It is formed as a result of subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones which are separated by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products, and morphology. While some differences can be explained by which volcanic zone a volcano belongs to, there are significant differences within volcanic zones and even between neighboring volcanoes. Despite being a type location for calc-alkalic and subduction volcanism, the Andean Volcanic Belt has a broad range of volcano-tectonic settings, as it has rift systems and extensional zones, transpressional faults, subduction of mid-ocean ridges and seamount chains as well as a large range of crustal thicknesses and magma ascent paths and different amounts of crustal assimi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communes Of Chile
A commune ( es, comuna, ) is the smallest administrative subdivision in Chile. It may contain cities, towns, villages, hamlets as well as rural areas. In highly populated areas, such as Santiago, Valparaíso and Concepción, a conurbation may be broken into several communes. In sparsely populated areas, conversely, a commune may cover a substantial rural area together with several settled areas which could range from hamlets to towns or cities. The term "commune" is ambiguous in English, but the word is commonly used in translation for "comuna", although with some controversy among translators. A comuna is similar to a "county" in Anglo-American usage and practice, and may be more universally understood as a "municipality". Each commune or municipality is governed by a directly elected body known as a municipal council (''concejo municipal'') consisting of a mayor (''alcalde'') and a group of councillors (''concejales''), for a period of four years. The communal civil service a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longaví
Longaví (in Mapudungun: ''snake's head'') is a Chilean city and commune located in Linares Province, one of the four provinces that make up the Maule Region, in the geographical center of Chile. Geography The commune has a surface of and is bordered by Linares in the north, Retiro and Parral in the south, San Javier in the west and Colbún in the east. The Achibueno River separates Longaví from Linares while the Longaví River separates it from Retiro. The city of Longaví lies on the left margin of the Liguay River, in the fertile central plain, and is located to the south of Santiago, the nation's capital, and to the south of Linares, the provincial capital. Longaví is linked with the rest of the country by the Pan-American Highway ('' Ruta 5 Sur''). The foothills of the Andes occupy the eastern part of the commune. The terrain there is mountainous and hilly, with beautiful landscapes, a well-developed hydrographic network and dense woods on the hills. Among the sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geology And Mining Service
250px, Sernageomin building in Providencia, Santiago. The National Geology and Mining Service ( es, Servicio Nacional de Geología y Minería; SERNAGEOMIN) is a Chilean government agency. Its function is to provide geological information and advice, technical assistance to government, public and private interests, and to regulate the mining industry in Chile. The service was formed in 1980 by the combination of the previous Institute of Geological Investigations and the State Mines Service. Its director is appointed by the President of Chile The president of Chile ( es, Presidente de Chile), officially known as the President of the Republic of Chile ( es, Presidente de la República de Chile), is the head of state and head of government of the Republic of Chile. The president is r ....United States Geological Survey">United States Geological Survey web site, The volcanos in Chile are monitored by SERNAGEOMIN Since 1974, SERNAGEOMIN has published the scientific journal ''An ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
