Petrographic, vibrational spectroscopic and microscopic analyzes on the Vigarano-type carbonaceous meteorite NWA 5508
Project no. 22924 · Status: Kapanmış · 2021
Summary
<p>Vigarano, the type of carbonaceous meteorite NWA (NorthWest Africa) 5508, is a (CV3) carbonaceous chondrite that fell near Ferrara, Italy, on January 22, 1910. Here, C refers to the carbonaceous class, V refers to the Vigarano group and 3 petrographic types. Vigarano is a typical example of CV group meteorites, most of which are distinguished by large (mm-sized) chondrules surrounded by magmatic rims, large refractory inclusions, and abundant matrix (40% by volume), according to The Meteoritical Society. Meteorite NWA 5508 also contains abundant CAI structures. CAI structures shed light on events that occurred in the early Solar system and provide information about the time and environmental conditions in which these events occurred. Most CAIs are smaller than 1 mm in size. The largest CAIs can be up to 2-3 cm in size and occur in only one chondrite type (CV3).</p><p><br></p><p> Petrographic, vibrational spectroscopic and microscopic analyzes were carried out on the Vigarano type carbonaceous meteorite NWA 5508, and scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), micro-Raman spectroscopy will be used to identify the minerals, functional groups, petrographic type in this meteorite and to classify the meteorite in detail. It was aimed to identify the minerals present in the NWA 5508 carbonaceous meteorite, to measure their chondrule sizes and densities, and to determine the group and subgroup to which this meteorite belongs, using infrared spectroscopy and petrography (optical microscopy) analysis methods.</p>