UV laser ablation and irm-GCMS microanalysis of 18O/16O and 17O/16O with application to a calcium-aluminium-rich inclusion from the Allende meteorite

Abstract-The Villalbeto de la Peña meteorite that fell in 2004 in Spain was originally classified as a moderately shocked L6 ordinary chondrite. The recognition of fragments within the Villalbeto de la Peña meteorite clearly bears consequences for the previous classification of the rock. The oxygen isotope data clearly show that an exotic eye-catching, black, and plagioclase-(maskelynite)-rich clast is not of L chondrite heritage. Villalbeto de la Peña is, consequently, reclassified as a polymict chondritic breccia. The oxygen isotope data of the clast are more closely related to data for the winonaite Tierra Blanca and the anomalous silicate-bearing iron meteorite LEW 86211 than to the ordinary chondrite groups. The REE-pattern of the bulk inclusion indicates genetic similarities to those of differentiated rocks and their minerals (e.g., lunar anorthosites, eucritic, and winonaitic plagioclases) and points to an igneous origin. The An-content of the plagioclase within the inclusion is increasing from the fragment/host meteorite boundary (approximately An 10 ) toward the interior of the clast (approximately An 52 ). This is accompanied by a successive compositionally controlled transformation of plagioclase into maskelynite by shock. As found for plagioclase, compositions of individual spinels enclosed in plagioclase (maskelynite) also vary from the border toward the interior of the inclusion. In addition, huge variations in oxygen isotope composition were found correlating with distance into the object. The chemical and isotopical profiles observed in the fragment indicate postaccretionary metamorphism under the presence of a volatile phase.

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“…Complete descriptions of the performed O‐isotope analysis techniques are given in Young et al. (1998) and Dyl et al. ().…”

Section: Samples and Analytical Techniquesmentioning

confidence: 99%

Reclassification of Villalbeto de la Peña—Occurrence of a winonaite‐related fragment in a hydrothermally metamorphosed polymict L‐chondritic breccia

Bischoff¹,

Dyl

Horstmann³

et al. 2013

Meteorit & Planetary Scien

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“…Laser micro‐sampling devices also hold potential to ultimately be hybridized with a gas‐accepting AMS system because of their suitability in analyzing intact carbon‐bearing materials at high precision. In the geosciences, such laser systems have been widely used to ablate material into a colloidal suspension of fine particles in a flowing gas for various analyses 2–6. The energy from laser sampling devices also heats surfaces which they contact in addition to ablating the surface; thus simultaneous chemical reaction and/or decomposition is expected.…”

mentioning

confidence: 99%

Selected‐Control Fabrication of Multifunctional Fluorescent–Magnetic Core–Shell and Yolk–Shell Hybrid Nanostructures

Liu

Wang

Zhang

et al. 2012

Chemistry A European J

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The selected-control preparation of uniform core-shell and yolk-shell architectures, which combine the multiple functions of a superparamagnetic iron oxide (SPIO) core and europium-doped yttrium oxide (Y(2)O(3):Eu) shell in a single material with tunable fluorescence and magnetic properties, has been successfully achieved by controlling the heat-treatment conditions. Furthermore, the shell thickness and interior cavity of SPIO@Y(2)O(3):Eu core-shell and yolk-shell nanostructures can be precisely tuned. Importantly, as-prepared SPIO@Y(2)O(3):Eu yolk-shell nanocapsules (NCs) modified with amino groups as cancer-cell fluorescence imaging agents are also demonstrated. To the best of our knowledge, this is the first report on the selected-control fabrication of uniform SPIO@Y(2)O(3):Eu core-shell nanoparticles and yolk-shell NCs. The combined magnetic manipulation and optical monitoring of magnetic-fluorescent SPIO@Y(2)O(3):Eu yolk-shell NCs will open up many exciting opportunities in dual imaging for targeted delivery and thermal therapy.

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“…Tourmaline samples of the pre‐ore and ore stages were analyzed using a modified laser‐based gas chromatography isotope ratio monitoring mass spectrometry (irm‐GCMS) extraction technique, which was previously described by Young et al . (1998).…”

Section: Methodsmentioning

confidence: 99%

Magmatic Nature of Mineralizing Fluids in the Solnechnoye Sn Deposit (Russia) Deduced from Isotopic (H, O) Compositions of Tourmaline

2011

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In this paper, we present new isotopic (H, O) data of fluids in tourmalines from the large Sn deposit at Solnechnoye (Far East Russia). These data indicate that the deposit formed by fluid-rock interactions in a hydrothermal system where the mineralizing fluid was mainly magmatic and to a lesser extent meteoric. This is in agreement with a magmatic fluid model. Our interpretation of the new isotopic data is consistent with earlier findings of the studies on fluid-rock interactions that magmatic fluids form larger Sn deposits than exogenic fluids. We propose that isotopic (H, O) data of fluids in tourmaline, rather than those in quartz, muscovite, or chlorite, support robust interpretation on the nature of mineralizing fluids associated with Sn deposits.

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UV laser ablation and irm-GCMS microanalysis of 18O/16O and 17O/16O with application to a calcium-aluminium-rich inclusion from the Allende meteorite

Cited by 41 publications

References 28 publications

Reclassification of Villalbeto de la Peña—Occurrence of a winonaite‐related fragment in a hydrothermally metamorphosed polymict L‐chondritic breccia

Reclassification of Villalbeto de la Peña—Occurrence of a winonaite‐related fragment in a hydrothermally metamorphosed polymict L‐chondritic breccia

Selected‐Control Fabrication of Multifunctional Fluorescent–Magnetic Core–Shell and Yolk–Shell Hybrid Nanostructures

Magmatic Nature of Mineralizing Fluids in the Solnechnoye Sn Deposit (Russia) Deduced from Isotopic (H, O) Compositions of Tourmaline

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