Catalogue of Meteorites from South America

Acevedo, Rogelio Daniel; Rocca, Maximiliano C. L.; García, Víctor Manuel Núñez

doi:10.1007/978-3-319-01925-3

Cited by 6 publications

(3 citation statements)

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“…More recent expeditions in the Arabian Peninsula (Hezel et al., 2011; Hofmann et al., 2018), Northern and Western China (Fan et al., 2022), Lut Desert (Pourkhorsandi et al., 2019), and the Atacama Desert (Gattacceca et al., 2011; Hutzler et al., 2016) have allowed the characterization of an extensive set of new DCAs. These new DCA studies are useful to constrain (i) the flux of extraterrestrial material to Earth over time (Drouard et al., 2019), (ii) the statistics of number and mass of meteorites at continental scale (Acevedo et al., 2014; Ouknine et al., 2019), and (iii) the paleoclimatic conditions of the areas from which meteorites have been recovered (Bland et al., 2006).…”

Section: Introductionmentioning

confidence: 99%

Dense collection areas and terrestrial alteration of meteorites in the Atacama Desert

Pinto,

Tavernier,

Gattacceca

et al. 2024

Meteorit & Planetary Scien

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In the last 15 years, more than 2700 meteorites have been recovered and officially classified from the Atacama Desert. Although the number of meteorites collected in the Atacama has risen, the physical and climatic properties of the dense collection areas (DCAs) have not been fully characterized. In this article, we compiled the published data of all classified meteorites found in the Atacama Desert to (i) describe the distribution by meteorite groups, (ii) compare the weathering degree of chondrites among different Atacama DCAs and other hot and cold deserts, and (iii) determine the preservation conditions of chondrites in the main Atacama DCAs in relation with the local climatic conditions. The 35 DCAs so far identified in the Atacama Desert are located in three main morphotectonic units: The Coastal Range (CR), Central Depression (CD), and Pre‐Andean Range/Basement. A comparison with reported weathering data from other cold and hot deserts indicates that the mean terrestrial weathering of Atacama chondrites (W1–2), displays less alteration than other hot deserts (W2–3) and resembles the weathering distribution of the Antarctic meteorites (W1–2). The highest abundance of Atacama chondrites with low weathering (≤W2) is localized in the CD (78.8%, N = 1435), which is protected from the coastal fog influence and seasonal rainfalls and displays the oldest surfaces in the Atacama Desert. The morphogenetic classification based on present‐day temperatures and precipitations of the main Atacama DCAs reveals similar regional/subregional climatic conditions in the most productive areas and a truly productive surface for meteorite recovery between 5% and 58% of the quadrangles formally defined for each Atacama DCA. Our morphogenetic classification lacks consideration of some meteorological parameters such as the coastal fog, so it cannot fully explain the differences in weathering patterns among CR chondrites. Future studies of chondrite preservation in the Atacama DCAs should consider other meteorological variables such as relative humidity, specific humidity, or dew point, in combination with exposure ages of meteorites and its surfaces.

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Section: Introductionmentioning

confidence: 99%

Dense collection areas and terrestrial alteration of meteorites in the Atacama Desert

Pinto,

Tavernier,

Gattacceca

et al. 2024

Meteorit & Planetary Scien

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“…Indeed, they can be as small as grains of dust up to bodies larger than 100 m in diameter. Speaking of that, this dimension is used as a marker of a nominal separation, i.e, those rocky objects without ice with diameters smaller than 100 m are classified as meteoroids, the largest being asteroids (ACEVEDO et. Al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…According to Acevedo et. al (2014) the amount of meteorites recovered in South America represents about 1% of the world total.…”

Section: Introductionmentioning

confidence: 99%

Chemical Composition and Classification of the Caçapava Do Sul Meteorite / Composição Química E Classificação Do Meteorito De Caçapava Do Sul

Soares

Souza

Werb

et al. 2021

BJD

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The amount of material present in the interplanetary space of the Solar System is still not completely known, as well as its size. Incidentally, they can be as small as grains of dust to bodies larger than 100 m in diameter. Meteoroids are a kind of these materials present in the interplanetary space are meteoroids. These are the bodies that penetrated the atmosphere reaching the Earth's surface, in this case, they are renaming like meteorite. They are similar ages to the origin of the Solar System, presenting geological characteristics similar to the known rocky planets. In fact, they can be an indirect means to extract information regarding the origin of the Solar System and the Earth. At the beginning of March 2017, a 26 cm wide and 27-kilo rock fallen in the early twentieth century, was confirmed as a meteorite. It receives the name of Caçapava do Sul Meteorite referring to the homonymous city. The meteorite was donated to the Universidade Federal do Pampa (UNIPAMPA), Campus Caçapava do Sul, Brazil, by the son of the person who finds the rock. This donation enabled the beginning of studies aimed at determining its chemical composition and its classification. This work is justified by the importance of understanding meteorites, as they keep records of the composition of the celestial bodies that make up the Solar System. Therefore, this work aims to classify the Caçapava do Sul Meteorite through geochemistry and determining its composition. And as a secondary, its classification according to the weather. Samples of the meteorite were sent to Prof. Dr.

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