1,721,144 research outputs found
Boron determination in twenty one silicate rock reference materials by isotope dilution ICP-MS
No full textPetrography, geochemistry and classification of ten new iron meteorites from Northwest Africa and Chile
Full text linkI present detailed petrographic descriptions and major- and trace-element data on a set
of ten new iron meteorites (irons) from Nortwest Africa and the Atacama Desert (Chile).
Part of these data were used to classify the meteorites upon their submission to the
Nomenclature Committee of the Meteoritical Society for official approval. The studied
irons belong to the following groups: IAB-complex (2 meteorites), IC (1), IIAB (1), IIE
(1), IIIAB (1), IVA (1). Three irons do not fall in any compositional group and, therefore,
are classified as ungrouped iron meteorites. Based on their structure, the ten irons were
subdivided into plessitic octahedrites (1 meteorite), fine octahedrites (2), medium
octahedrites (1), coarse octahedrites (1), ataxites (1) and in iron with anomalous structure
(4). The distribution of the studied irons among the chemical groups is consistent with
what has already been observed by other authors, that is, irons from northern Africa
and Antarctica have a high frequency of ungrouped irons and of members of the IAB-
complex with respect to irons from other parts of the world. This biased distribution
is discussed in relation to the smaller median size of irons from northern Africa and
Antarctica in comparison with meteorites from other parts of the world
A MACINTOSH BASIC PROGRAM FOR THE INTERACTIVE TESTING OF COMBINED ASSIMILATION AND FRACTIONAL CRYSTALLIZATION
No full textNATURA ED EVOLUZIONE DELLE VULCANITI DELL'ETNA E LORO RELAZIONI CON IL MAGMATISMO IBLEO
No full textTesi di Dottorat
Trace element determination in igneous rocks by ICP-MS: results on ten international reference samples
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Historical publications on meteorites (1867-1934) in the "Miscellanea D'Achiardi" (Dipartimento di Scienze della Terra, University of Pisa, ITALY)
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Simultaneous determination of neodymium and samarium in silicate rocks and minerals by isotope dilution inductively coupled plasma mass spectrometry: results on twenty geochemical reference samples
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