Analysis of the evolution and rank distribution of coals from the Oyon basin (Upper Jurassic) of Peru
The Oyon Coal Basin (Upper Jurassic) is located in the central part of Peru and it is centered around two nuclei of very faulted and strongly tectonized anticlines. The middleupper part of the Oyon Formation which is representative of the sedimentary registry of this Basin contains the coal producti...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1996 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | inglés |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/12249 |
| Acceso en línea: | http://hdl.handle.net/10272/12249 |
| Access Level: | acceso abierto |
| Palabra clave: | Peru Oyon Basin Coal Rank Upper Jurassic Andean orogeny Cuenca de Oyón Carbón Rango Jurásico Superior Orogenia Andina |
| Sumario: | The Oyon Coal Basin (Upper Jurassic) is located in the central part of Peru and it is centered around two nuclei of very faulted and strongly tectonized anticlines. The middleupper part of the Oyon Formation which is representative of the sedimentary registry of this Basin contains the coal productive series. This series is formed by sandstones and clay sediments among which 5 very faulted coal seams are interlayered. Coals from this Basin are hum ic and they are mainly com po sed o fv itrin ite (85-97% vol.) with a relative to moderate mineral matter content (ash: 6-36%). Their degree of evolution was determined from vitrinite reflectance measurements a nd carbon con te n t. The co a l rank into this Basin sh o w s a definite distribution w hich is successively represented by low volatile bituminous coals, semi-anthracites, anthracites and metaanthracites. The high degree of evolution reached by these coals is due to the high thermal gradient resulting from the location of important intrusive stocks (belonging to the Coast Batholit) and the subsequent volcanic activity of the different phases of the Andean Orogeny, consequence of the collision ad subduction processes of the Nazca Plate under South American lithospheric Plate |
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