Quantified, whole section trace element mapping of carbonaceous chondrites by Synchrotron X-ray Fluorescence Microscopy: 1. CV meteorites
MetadataShow full item record
We present the application of a new synchrotron-based technique for rapid mapping of trace element distributions across large areas of the CV3 meteorites Allende and Vigarano. This technique utilizes the Australian Synchrotron X-ray Fluorescence Microscopy (XFM) beam line with its custom designed and built X-ray detector array called Maia. XFM with Maia allows data to be collected using a 2 µm spot size at very low dwell times (~0.1–0.5 ms), resulting in maps of entire thin sections in ~5 h. Maia is an energy dispersive detector system with a large collection solid-angle, which allows full spectral acquisition and high sensitivity. Hence, there is no need to constrain the elements of interest a priori.We collected whole section maps (~2 cm × 1 cm) from 3 thick sections of Allende and a single map (2 cm × 1.5 cm) from a thick section of Vigarano. Our experimental conditions provide data for elements with 20 ? Z ? 40 (K-shell, Ca through Zr) and the L-emissions of Os, Ir, Pt, Au, and Pb. We illustrate the unique capabilities of this technique by presenting observations across myriad length scales, from the centimeter-scale down to the detection of sub-micrometer particles within these objects. Our initial results show the potential of this technique to help decipher spatial and textural variations in trace element chemistry between CAIs, chondrules, matrix, and other chondritic components. We also illustrate how these datasets can be applied to understanding both nebular and parent-body processes within meteorites.
Showing items related by title, author, creator and subject.
Isotopic and elemental tracers in ice and snow as indicators of source regions of aerosols and changing environmental conditionsBurn, Laurie (2009)Pioneering studies of lead (Pb) concentrations in polar ice by Clair C. Patterson and co-workers (e.g. Murozumi et al., 1969; Boutron and Patterson, 1983, 1986) revealed important information on climatic changes dating ...
Investigation of the production and mechanical properties of porous Beta Titanium alloy compacts prepared by powder metallurgy processes for biomedical applicationsNugroho, Aris Widyo (2013)Titanium and its alloys are known to be widely used for biomedical applications due to their biocompatibility, and excellent corrosion resistance. The introduction of porosity into the metals may reduce the stiffness to ...
Chemical alterations to murine brain tissue induced by formalin fixation: Implications for biospectroscopic imaging and mapping studies of disease pathogenesisHackett, Mark; McQuillan, J.; El-Assaad, F.; Aitken, J.; Levina, A.; Cohen, D.; Siegele, R.; Carter, E.; Grau, G.; Hunt, N.; Lay, P. (2011)Understanding biochemical mechanisms and changes associated with disease conditions and, therefore, development of improved clinical treatments, is relying increasingly on various biochemical mapping and imaging techniques ...