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Cuantificación experimental del contenido de hidrógeno en el núcleo de la Tierra

Dongyang Huang^1,2, Motohiko Murakami³, Stephan Gerstl⁴

¹SKLab-DeepMinE, MOEKLab-OBCE, School of Earth and Space Sciences, Peking University, Beijing, China. dhuang@pku.edu.cn.

Nature communications

|February 10, 2026

Resumen

El núcleo de la Tierra puede contener grandes cantidades de hidrógeno, equivalente a 9-45 océanos de agua. Esto sugiere que la Tierra adquirió la mayor parte de su agua durante la formación, no de los cometas.

Área de la Ciencia:

La geoquímica es la geoquímica.
Ciencias planetarias Ciencias planetarias.
Física de los minerales de alta presión Física de los minerales de alta presión

Sus antecedentes:

Se supone que el núcleo de la Tierra es un gran depósito de hidrógeno.
Cuantificar el hidrógeno del núcleo es un desafío debido a las condiciones extremas.

Objetivo del estudio:

Para cuantificar el contenido de hidrógeno (H) en el núcleo de la Tierra.
Para investigar los mecanismos de secuestro de hidrógeno durante la formación del núcleo.

Principales métodos:

Experimentos de partición de silicato metálico superlíquido utilizando células de yunque de diamante calentadas con láser.
Tomografía de sonda atómica para la observación directa de H.

Principales resultados:

Observación directa de hidrógeno asociado con nanoestructuras ricas en silicio y oxígeno en aleaciones de hierro.
Evidencia de secuestro acoplado de Si, O y H durante la formación del núcleo.
Contenido estimado de hidrógeno en el núcleo de 0,07-0,36 por ciento en peso, equivalente a 9-45 océanos de agua.

Conclusiones:

El núcleo de la Tierra probablemente contiene una cantidad significativa de hidrógeno.
La relación Si/H observada sugiere un mecanismo de secuestro específico.
Este hallazgo implica que la Tierra obtuvo principalmente su agua durante la acreción, no a través de impactos cometarios.

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