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Core–mantle differentiation is the set of processes that took place during the accretion stage of Earth's evolution (or more generally, of rocky planets) that results in the separation of iron-rich materials that eventually would conform a metal core, surrounded by a rocky mantle. According to the Safronov's model, protoplanets formed as the result of collisions of smaller bodies (planetesimals), which previously condensed from solid debris present in the original nebula. Planetesimals contained iron and silicates either already differentiated or mixed together. Either way, after impacting the Proto-Earth their materials very likely became homogenized. At this stage, the Proto-Earth was probably the size of Mars. Next followed the separation and stratification of the Proto-Earth's constitu

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  • Core–mantle differentiation is the set of processes that took place during the accretion stage of Earth's evolution (or more generally, of rocky planets) that results in the separation of iron-rich materials that eventually would conform a metal core, surrounded by a rocky mantle. According to the Safronov's model, protoplanets formed as the result of collisions of smaller bodies (planetesimals), which previously condensed from solid debris present in the original nebula. Planetesimals contained iron and silicates either already differentiated or mixed together. Either way, after impacting the Proto-Earth their materials very likely became homogenized. At this stage, the Proto-Earth was probably the size of Mars. Next followed the separation and stratification of the Proto-Earth's constituents, chiefly driven by their density contrasts. Factors such as pressure, temperature, and impact bodies in the primordial magma ocean were involved in the differentiation process. The differentiation process is driven by the higher density of iron compared to silicate rocks, but the lower melting point of the former constitutes an important factor. In fact, once iron has melted, differentiation can take place whether silicate rocks are completely melted or not. On the premises of these plausible scenarios, several models have been proposed to account for the core-mantle differentiation following the stage of nebular formation of the solar system. They can be summarized into three mechanisms: 1) Percolation of iron alloy through silicate crystals; 2) Separation of metal from rock in a primordial magma ocean; 3) Migration of iron diapirs or dikes through the mantle. (en)
  • La diferenciación núcleo-manto es el conjunto de procesos que tuvieron lugar durante la etapa de acreción​ de la evolución de la Tierra (o más generalmente, de planetas rocosos) que resulta en la separación de materiales ricos en hierro que eventualmente conformarían un núcleo metálico, rodeado por un manto rocoso Según el modelo de Safronov,​ los protoplanetas se formaron como resultado de colisiones de cuerpos más pequeños (planetesimales), que previamente se condensaron a partir de restos sólidos presentes en la nebulosa original. Los planetesimales contenían hierro y silicatos ya sea diferenciados o mezclados entre sí. De cualquier manera, después de impactar la proto-Tierra, sus materiales muy probablemente se homogeneizaron. En esta etapa, la proto-Tierra era probablemente del tamaño de Marte. Luego siguió la separación y estratificación de los constituyentes de la proto-Tierra, principalmente debido a sus contrastes de densidad. Factores como la presión, la temperatura y los cuerpos de impacto en el primordial océano de magma ​ han estado involucrados en el proceso de diferenciación. El proceso de diferenciación es impulsado por la mayor densidad de hierro en comparación con las rocas de silicato, pero el punto de fusión más bajo de la primera constituye un factor importante. De hecho, una vez que el hierro se ha derretido, se puede diferenciar si las rocas de silicato se derriten por completo o no.​ En las premisas de estos escenarios plausibles, se han propuesto varios modelos para explicar la diferenciación núcleo-manto después de la etapa de formación nebular del sistema solar.​ Se pueden resumir en tres mecanismos: 1. * Percolación de aleación de hierro a través de la masa de cristales de silicato; 2. * Separación del metal de la roca en un océano de magma primordial; 3. * Migración de diapiros o diques de hierro a través del manto.​ (es)
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  • Core–mantle differentiation is the set of processes that took place during the accretion stage of Earth's evolution (or more generally, of rocky planets) that results in the separation of iron-rich materials that eventually would conform a metal core, surrounded by a rocky mantle. According to the Safronov's model, protoplanets formed as the result of collisions of smaller bodies (planetesimals), which previously condensed from solid debris present in the original nebula. Planetesimals contained iron and silicates either already differentiated or mixed together. Either way, after impacting the Proto-Earth their materials very likely became homogenized. At this stage, the Proto-Earth was probably the size of Mars. Next followed the separation and stratification of the Proto-Earth's constitu (en)
  • La diferenciación núcleo-manto es el conjunto de procesos que tuvieron lugar durante la etapa de acreción​ de la evolución de la Tierra (o más generalmente, de planetas rocosos) que resulta en la separación de materiales ricos en hierro que eventualmente conformarían un núcleo metálico, rodeado por un manto rocoso Según el modelo de Safronov,​ los protoplanetas se formaron como resultado de colisiones de cuerpos más pequeños (planetesimales), que previamente se condensaron a partir de restos sólidos presentes en la nebulosa original. Los planetesimales contenían hierro y silicatos ya sea diferenciados o mezclados entre sí. De cualquier manera, después de impactar la proto-Tierra, sus materiales muy probablemente se homogeneizaron. En esta etapa, la proto-Tierra era probablemente del tamaño (es)
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  • Core–mantle differentiation (en)
  • Diferenciación núcleo-manto (es)
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