Video Experimental Relacionado
Updated: Jul 12, 2026
10:42
Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
Published on: December 29, 2016
Origen del plomo en las lavas calc-alcalinas andinas, sur del Perú
Science (New York, N.Y.)
|December 12, 1980
Resumen
Análisis de isótopos de plomo del sur del Perú.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Geología de Isótopos Geología de Isótopos.
- Volcanología Volcanología.
Sus antecedentes:
- Las lavas andesíticas en el sur del Perú proporcionan información sobre las interacciones entre la corteza y el manto.
- Comprender el origen de los magmas es crucial para descifrar los procesos tectónicos.
Objetivo del estudio:
- Para investigar la composición isotópica del plomo de lavas andesíticas cuaternarias y gneises precámbricos en el sur del Perú.
- Determinar las fuentes de plomo en la lava andesítica y el papel de los componentes de la corteza.
Principales métodos:
- Análisis de isótopos de plomo de rocas volcánicas (lavas andesíticas) y rocas de la corteza terrestre (gneises granulíticos).
- Aplicación de modelos de mezcla de múltiples componentes para interpretar los datos de isótopos.
Principales resultados:
- Los datos de isótopos de plomo indican una contribución significativa de gneises granulíticos del Precámbrico a las lavas andésticas del Cuaternario.
- El plomo en las lavas puede explicarse por la mezcla entre fuentes derivadas del manto y fuentes de la corteza inferior.
Conclusiones:
- La corteza inferior del Precámbrico es una fuente clave de plomo en los magmas andesíticos del sur del Perú.
- La génesis de magma en esta región implica complejos procesos de mezcla entre el manto y las reservas de la corteza.
Más Videos Relacionados
Videos de Conceptos Relacionados
03:46Qualitative Analysis
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
00:52Washing, Drying, and Ignition of Precipitates
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
00:56Extraction: Advanced Methods
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
00:49Gravimetry: Inorganic And Organic Precipitating Agents
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...