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Nature

Resumen/Descripción – provisto por la editorial en inglés

Nature is a weekly international journal publishing the finest peer-reviewed research in all fields of science and technology on the basis of its originality, importance, interdisciplinary interest, timeliness, accessibility, elegance and surprising conclusions. Nature also provides rapid, authoritative, insightful and arresting news and interpretation of topical and coming trends affecting science, scientists and the wider public.

Palabras clave – provistas por la editorial

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Información

Tipo de recurso:

revistas

ISSN impreso

0028-0836

ISSN electrónico

1476-4687

Editor responsable

Springer Nature

País de edición

Reino Unido

Fecha de publicación

1869-

Cobertura temática

Ciencias naturales

Ingeniería y tecnología

Ciencias médicas y de la salud

Ciencias agrícolas y veterinarias

Tabla de contenidos

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doi: 10.1038/35077031

Conversion of silicon carbide to crystalline diamond-structured carbon at ambient pressure

Yury Gogotsi; Sascha Welz; Daniel A. Ersoy; Michael J. McNallan

Palabras clave: Multidisciplinary.

Pp. 283-287

doi: 10.1038/35077041

A 300-million-year record of atmospheric carbon dioxide from fossil plant cuticles

Gregory J. Retallack

Palabras clave: Multidisciplinary.

Pp. 287-290

doi: 10.1038/35077048

Strong coherence between solar variability and the monsoon in Oman between 9 and 6â€‰kyr ago

U. Neff; S. J. Burns; A. Mangini; M. Mudelsee; D. Fleitmann; A. Matter

Palabras clave: Multidisciplinary.

Pp. 290-293

doi: 10.1038/35077056

Metamorphic devolatilization of subducted marine sediments and the transport of volatiles into the Earth's mantle

D. M. Kerrick; J. A. D. Connolly

<jats:title>Abstract</jats:title><jats:p>Volatiles, most notably CO<jats:sub>2</jats:sub>, are recycled back into the Earth's interior at subduction zones<jats:sup>1,2</jats:sup>. The amount of CO<jats:sub>2</jats:sub> emitted from arc volcanism appears to be less than that subducted, which implies that a significant amount of CO<jats:sub>2</jats:sub> either is released before reaching the depth at which arc magmas are generated or is subducted to deeper depths. Few high-pressure experimental studies<jats:sup>3,4,5</jats:sup> have addressed this problem and therefore metamorphic decarbonation in subduction zones remains largely unquantified, despite its importance to arc magmatism, palaeoatmospheric CO<jats:sub>2</jats:sub> concentrations and the global carbon cycle<jats:sup>6</jats:sup>. Here we present computed phase equilibria to quantify the evolution of CO<jats:sub>2</jats:sub> and H<jats:sub>2</jats:sub>O through the subduction-zone metamorphism of carbonate-bearing marine sediments (which are considered to be a major source for CO<jats:sub>2</jats:sub> released by arc volcanoes<jats:sup>6</jats:sup>). Our analysis indicates that siliceous limestones undergo negligible devolatilization under subduction-zone conditions. Along high-temperature geotherms clay-rich marls completely devolatilize before reaching the depths at which arc magmatism is generated, but along low-temperature geotherms, they undergo virtually no devolatilization. And from 80 to 180â€‰km depth, little devolatilization occurs for all carbonate-bearing marine sediments. Infiltration of H<jats:sub>2</jats:sub>O-rich fluids therefore seems essential to promote subarc decarbonation of most marine sediments. In the absence of such infiltration, volatiles retained within marine sediments may explain the apparent discrepancy between subducted and volcanic volatile fluxes and represent a mechanism for return of carbon to the Earth's mantle.</jats:p>

Palabras clave: Multidisciplinary.

Pp. 293-296