Papers by Christina Palacios
El propósito de este ensayo es dar a conocer la vida y obra de David Alfaro Siqueiros, uno de los... more El propósito de este ensayo es dar a conocer la vida y obra de David Alfaro Siqueiros, uno de los tres grandes muralistas del México del siglo XX. Siqueiros es considerado como un teórico del arte que va siempre en busca de nuevas técnicas y nuevas formas. Es una de las figuras más importantes del arte mexicano del siglo pasado, por eso es necesario resaltar algunos aspectos de su vida y sobre todo de su obra, la cual afortunadamente sigue existiendo en nuestros días.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
Nature, 1986
The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subae... more The islands of San Felix, San Ambrosio and the Juan Fernandez group comprise one of the few subaerial occurrences of intraplate oceanic volcanism between the Mid-Atlantic Ridge and the East Pacific Rise south of 20° S, and are therefore valuable in the assessment of large-scale geochemical heterogeneities in the Earth's mantle1-3. We present here the results of a preliminary Sr, Nd and Pb iosotpic study of basic lavas from these islands. All samples show a moderate Dupal3 signature (anomalous Sr, Nd and Pb isotopic compositions). Basalts from the Juan Fernandez group lie close to the mantle plane4, whereas basalts from San Felix display unusual isotopic characteristics which plot well below the Nd-Sr oceanic array. Based on this data, we propose the delineation of a new mantle array, linear in Nd-Sr-Pb isotopic space, with Tubuaii and Walvis Ridge as end members. The mixing relationships exhibited by this array suggest that both end members are geographically contiguous, and probably reside in delaminated sub-continental lithosphere.
El propósito de este ensayo es dar a conocer la vida y obra de David Alfaro Siqueiros, uno de los... more El propósito de este ensayo es dar a conocer la vida y obra de David Alfaro Siqueiros, uno de los tres grandes muralistas del México del siglo XX. Siqueiros es considerado como un teórico del arte que va siempre en busca de nuevas técnicas y nuevas formas. Es una de las figuras más importantes del arte mexicano del siglo pasado, por eso es necesario resaltar algunos aspectos de su vida y sobre todo de su obra, la cual afortunadamente sigue existiendo en nuestros días.
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Papers by Christina Palacios