0.68 g – AGUAS ZARCAS METEORITE – Carbonaceous CM2 – 2019 Witnessed fall – The Bus Mods – Omsi 2 Mods

0.68 g - AGUAS ZARCAS METEORITE - Carbonaceous CM2 - 2019 Witnessed fall

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Location: Peoria, Arizona
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Item: 326062328845

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My name is Ruben Garcia – aka MrMeteorite – and I’m a meteorite hunter, dealer, and collector. I began my meteorite adventures in 1998 and since then I have found many thousands of meteorites as well purchased and sold many thousands more. I’ve been featured in many books and magazines about meteorites. Publications like Sky and Telescope, Discover, Iguana, Meteorite Times, and even the latest book by O. Richard and Dorothy Norton, called “What’s so Mysterious about Meteorites?” I’ve also been featured in such TV shows as, Cash and Treasures, Meteorite Men, Nova Science NOW with Neil deGrasse Tyson, and the United Stats of America – a program all about various statistics – with Sklar Brothers as hosts. Of course, I’ve also been the subject of newspaper articles all across the country as well as various NPR and BBC radio shows. Normal 0 false false false EN-US X-NONE X-NONE You can bid with confidence since everything I sell is guaranteed to be exactly as listed. I include a handwritten (business card size) certificate of authenticity with each specimen. If you have a question, please feel free to send a message before bidding. ———————————————————————————————- Here’s information (from the Meteorite Bulletin) about this particular meteorite.Aguas Zarcas Basic information Name: Aguas Zarcas This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: Yes, confirmed fall Year fell: 2019 Country: Costa Rica Mass: 27 kg Classification history: Meteoritical Bulletin: (2020) CM2 Recommended: CM2 This is 1 of 633 approved meteorites classified as CM2. Comments: Approved 30 May 2019 Revised 31 May 2019: corrected fall date Writeup Aguas Zarcas 10°23’29.03″N, 84°20’28.58″W Alajuela, Costa Rica Confirmed fall: 2019 Apr 23 Classification: Carbonaceous chondrite (CM2) History: (G.J. Soto; P. Madrigal, O. Lücke, Escuela Centroamericana de Geología, Universidad de Costa Rica; M. Farmer, Arizona) At 21:07 local time on 23 April 2019, a meteorite fall was reported in Aguas Zarcas, San Carlos county, Alajuela province, Costa Rica. The fireball traveled WNW to ESE and was caught on cameras of the National Seismological Network (RSN) at the summit of Poás and Turrialba volcanoes, and from the Volcanological and Seismological Observatory of Costa Rica (OVSICORI). Sightings were reported from Quepos (Central Pacific) in the south and north to La Palmera in San Carlos. The first piece recovered, 1152 g, crashed through a house at 10°23’29.03″N, 84°20’28.58″W. A dog house was hit by a 280 g piece at 10°24’9.35″N 84°21’51.26″W. The BRAMON (Brazilian Meteors Observation Network), UNESP (São Paulo State University) and USP (University of São Paulo) teams determined the atmospheric trajectory of the bolide from four security videos and dashcam cameras. The bolide had an entry angle of 73° relative to the ground, traveling 20.7 km in the 4-s analyzed interval, with an atmospheric velocity of 14 km/s. Analysis shows a projected elliptical strewn-field with major axis length of 6.3 and minor axis of 3.3 km. Hundreds of stones were recovered within the projected strewn-field. The bolide orbit was determined, with the follow preliminary elements: semi-major axis 2.7 AU, eccentricity 0.63, inclination 3.09°, pericenter longitude of 185.3° and ascending node 33.4°. Current total recovered mass is around 27 kg, of which ~11 kg was collected before rain fell over the fall site. Physical characteristics: (L. Garvie, ASU) Hundreds of fusion-crusted stones ranging from 0.1 to 1868 g. Stones under ~50 g are typically angular to blocky and lack regmaglypts. Also found were several plate-like, oriented stones. For example, one oriented plate is 13 cm wide and 1 cm thick. Many stones are oriented with a domed leading edge and well-developed roll-over lip along the rim of the trailing edge. Larger stones, especially those near 1 kg, show broad regmaglypts, some well developed. The fusion crust on several of the trailing edge surfaces is iridescent. Pre-rain material crushed in a few ml of water emits a powerful “Murchison-like” odor, though with a more prominent compost-like scent. Petrography: (L. Garvie, ASU) The interior of the stones is uniformly dark gray and studded with small light-colored speckles. Stones are brecciated and dominated by two lithologies: chondrule poor, constituting ~80 areal% of the broken surfaces examined (~2 kg of material), and chondrule rich. Chondrules constitute ~10 areal% of the chondrule-poor lithology and ~40 areal% in the chondrule-rich lithology. Some broken surfaces show clasts of the chondrule-rich lithology in the chondrule-poor type. Clasts with lower chondrule to matrix ratio also present; for example, one 3 g half stone shows <1 areal% chondrules. A probe mount of the dominant chondrule-poor lithology (sample area 1.5 × 2.2 cm) shows scattered small chondrules (mean 275 μm, n=40), with prominent fine-grained rims. Rare chondrules to 2 mm. Fe-Ni metal, which is Cr-bearing, was only found as rounded grains in one 100-μm type I chondrule. The section contains several Al-rich CAIs to 300 μm. The matrix is dominated by two components of roughly equal proportions: anhedral clumps (typically 50 microns) that are Fe and S rich (e.g., 37.5 wt% Fe and 5.8 wt% S, with microprobe total of 93%), surrounded by fine-grained material poorer in Fe and S (e.g., 12.8 wt% Fe, 13.9 wt% Mg, and 0.5 wt% S, with microprobe total of 80.0%). Powder XRD from five stones (one chondrule rich) shows patterns dominated by serpentine. In two stones, the serpentine 001 reflection sits on a broad peak centered at 0.843 nm. Reflections for tochilinite and calcite occur in all patterns. The intensities of olivine and pyroxene reflections were generally low, but most prominent in the chondrules-rich stone. Geochemistry: Oxygen isotopes (K. Ziegler, UNM): 7 pre-rain fragments analyzed by laser fluorination gave δ18O= 10.342, 10.807, 11.591, 12.314, 12.249, 12.669, 9.748; δ17O= 2.381, 2.932, 3.360, 3.843, 3.995, 3.959, 2.143; Δ17O=-3.080, -2.775, -2.759, -2.659, -2.472, -2.730, -3.004 (linearized, all per mil, TFL slope=0.528). Microprobe (L. Garvie, ASU): Fa0.4-41.0, n=10. Classification: Geochemistry and oxygen isotopic data consistent with CM2. Specimens: 248 g ASU; MFarmer - 6.5 kg; Achim Karl - 2.5 kg; Robert Ward - 3.2 kg; Kevin Kichinka - 489 g.

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