Academic literature on the topic 'Meteoritos'
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Journal articles on the topic "Meteoritos"
Pucheta, Flavia Noelia, Maria Elizabeth Zucolotto, Vitória Régia Péres da Rocha Oliveiros Marciano, César Mendonça Ferreira, Flávio Sandro Lays Cassino, and Antônio Luciano Gandini. "Estudo petrográfico e metalográfico dos meteoritos Bocaiúva e João Pinheiro aliado à técnica de MEV/EDS." Rem: Revista Escola de Minas 64, no. 2 (June 2011): 155–61. http://dx.doi.org/10.1590/s0370-44672011000200004.
Full textNobre, Augusto Gonçalves, Gaston Eduardo Enrich Rojas, Ananda Lopes Proença Ribeiro Fonseca, and Odila Florêncio. "História e desenvolvimento da ciência meteorítica." Terrae Didatica 17 (November 30, 2021): e021041. http://dx.doi.org/10.20396/td.v17i00.8667026.
Full textCarvalho, Wilton Pinto, Débora Correia Rios, Maria Elizabeth Zucolotto, Herbet Conceição, Acácio José Silva Araújo, and Amanda Araújo Tosi. "O meteorito Palmas de Monte Alto:." Geologia USP. Série Científica 18, no. 3 (October 3, 2018): 15–31. http://dx.doi.org/10.11606/issn.2316-9095.v18-132539.
Full textPEREIRA, GONZALO. "¿TIENEN EL MISMO ORIGEN LOS METEORITOS METÁLICOS ENCONTRADOS EN BOLIVIA?" Revista Boliviana de Física 38, no. 38 (November 30, 2021): 10–14. http://dx.doi.org/10.53287/eohr3986hv72b.
Full textPinto, Gabriel, Laura Flores, and Rodrigo Martínez. "Museos interactivos de ciencia y la alfabetización científica." Ápice. Revista de Educación Científica 4, no. 2 (December 1, 2020): 63–72. http://dx.doi.org/10.17979/arec.2020.4.2.5829.
Full textNascimento-Dias, Bruno. "Aplicação da espectroscopia Raman na identificação de olivinas em meteoritos." Journal of Experimental Techniques and Instrumentation 4, no. 2 (April 14, 2021): 21–28. http://dx.doi.org/10.30609/jeti.v4i2.12434.
Full textMendez Escamilla, Y., G. Gallegos Ortega, and J. A. Cobos-Murcia. "Micro-diamantes originados por impacto de meteoritos." Tópicos de Investigación en Ciencias de la Tierra y Materiales 5, no. 5 (May 10, 2022): 69–76. http://dx.doi.org/10.29057/aactm.v5i5.9116.
Full textGarcía Cruz, Cándido Manuel. "Miguel Rubín de Celis (1746-1799) and the meteorite of Campo del Cielo (El Chaco Austral, Argentina)." Boletín de la Real Sociedad Española de Historia Natural 2023/117 (2023): 89–105. http://dx.doi.org/10.29077/bol.2023.117.garciacruz.
Full textNascimento-Dias, Bruno Leonardo. "METEORITOS CONDRITOS: ROCHAS EXTRATERRESTRES PRIMITIVAS DO SISTEMA SOLAR." Revista Geociências - UNG-Ser 20, no. 1 (December 27, 2021): 36. http://dx.doi.org/10.33947/1981-741x-v20n1-4672.
Full textNASCIMENTO-DIAS, Bruno Leonardo. "METEORITOS MARCIANOS REALMENTE VIERAM DE MARTE?" Geosciences = Geociências 40, no. 3 (October 18, 2021): 771–80. http://dx.doi.org/10.5016/geociencias.v40i03.15623.
Full textDissertations / Theses on the topic "Meteoritos"
Moyano, Cambero Carles Eduard. "Physico-chemical properties of chondritic meteorites. Clues on the origin and evolution of their parent bodies." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/457741.
Full textIn the first million years of the solar nebula, specific conditions triggered, from aggregation and melting of dust and presolar grains, the formation of the first solid materials of the Solar System. Among them, a variety of igneous glassy spherules known as chondrules can be found. These materials progressively aggregated together with dust and interplanetary particles to form larger bodies, such as asteroids, planetesimals, and finally planets. From those, some experienced chemical segregation due to heating and melting of their materials. The bodies that did not melt, called undifferentiated, still conserve some of these very primordial materials of the Solar System. The meteorites coming from these objects, known as chondrites from the chondrules that they contain, are therefore samples of materials formed in the protoplanetary disk around the Sun about 4,600 million years ago. This thesis studies chondrites with a multidisciplinary approach, starting with the exploration of several instrumental techniques applied to a Martian meteorite. Those techniques allow the study of several physico-chemical properties of chondrites, and therefore provide clues about the complex accretionary histories of their parent bodies. The specific mineralogy and features related to thermal metamorphism, aqueous alteration, and the effects of shock of two chondrites are described here in the context of their possible parent asteroids. Besides, spectroscopic techniques are applied as suitable method to link the meteorite samples to specific asteroids currently populating the Solar System. Retrieving samples directly from asteroids is a very complex concept, and therefore terrestrial collections of meteorites become a very available source of samples. The information obtained from chondrites can be extrapolated to better understand the composition, structure, and physical properties of asteroids. Thus, the study of chondrites can facilitate the practical applications on asteroids, such as space mining or the concept explored in this thesis: the deflection through solid projectiles of asteroids that suppose a potential thread to life on Earth, one of the goals the ESA and NASA collaboration known as the AIDA mission. Most of these potentially dangerous objects are made of chondritic materials, and therefore the study of chondrites can provide valuable information about them, which is key in order to be prepared for the possible future catastrophic impact events.
Tanbakouei, Safoura. "Reflectance properties and mineralogy of asteroids by using carbonaceous chondrites." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670875.
Full textPara comprender el Sistema Solar en su forma actual y la formación de los planetas, los cuerpos pequeños juegan un papel clave. La composición de asteroides y cometas nos proporciona claves sobre el nacimiento del sistema solar y su evolución. Los pequeños cuerpos no diferenciados contienen los primeros materiales sólidos del Sistema Solar, formados a partir de la agregación y el fundido del polvo primordial. A partir de estos primeros bloques constitutivos se formaron cuerpos mayores como los asteroides, cometas y planetas. Los cuerpos rocosos con un tamaño mayor a pocos cientos de kilómetros de diámetro experimentaron segregación química debido a la diferenciación, pero los menores irradiaron el calor interior y nunca se fundieron. Los cuerpos no diferenciados han preservado los materiales prístinos que formaban el disco protoplanetario. Estos materiales preservados están alojados en meteoritos no diferenciados. Los meteoritos procedentes de estos objetos, conocidos como condritas, son muestras de materiales formados en el disco protoplanetario alrededor del Sol hace unos 4.600 millones de años. Entre ellos, las condritas carbonáceas son las únicas muestras disponibles que representan asteroides carbonáceos que son importantes para comprender sus propiedades físicas y para comparar con las muestras retornadas por las misiones Hayabusa 2 y OSIRIS-Rex. Esta tesis se centra en la composición química, mineralogía, así como las propiedades físico-químicas de los cuerpos menores del Sistema Solar mediante medidas en el laboratorio de sus meteoritos. Diversas técnicas descritas aquí permiten el estudio de las propiedades de las condritas y, de esta manera, obtener claves sobre las complejas historias acrecionarias de sus cuerpos progenitores. Los cambios mineralógicos asociados al metamorfismo térmico, la alteración acuosa o a los efectos de choque en condritas son descritos en el contexto de indagar en la naturaleza de sus asteroides padres. Además, técnicas espectroscópicas son aplicadas como un método adecuado para asociar los meteoritos a sus asteroides específicos, aunque una asociación inequívoca requerirá completar misiones de retorno de muestras. En la primera parte de este trabajo se comparan los espectros de reflexión de dos grupos de condritas carbonáceas químicamente relacionados: CV y CK. Las propiedades reflectivas de esos dos grupos de condritas son comparados con la clase espectral Cg de asteroides. Dado que los asteroides han sido expuestos a impactos desde su formación sus superficies están cubiertas por pequeñas partículas, rocas y bloques mayores. La misión Hayabusa de JAXA recolectó partículas del regolito del asteroide 25143 Itokawa. Los estudios en el laboratorio de esas partículas proporcionan una oportunidad científica dado que sus propiedades físicas pueden ser comparadas con aquellas de las condritas que pueden ser consideradas buenos ejemplos de los materiales constitutivos de los asteroides potencialmente peligrosos (PHAs). En la segunda parte de la tesis se presentan los resultados del estudio de las propiedades mecánicas de tres de esas partículas usando una técnica precisa denominada nanoindentación. Finalmente también se estudian las propiedades de cuerpos oscuros asociados con cometas evolucionados. En ese sentido el cometa 2P/Encke es uno de los mayores objetos del llamado complejo de las Táuridas. Su comportamiento espectral hace que sea similar a las condritas carbonáceas prístinas, pero se conocía bien poco a su naturaleza real. En este trabajo se ha encontrado un buen ajuste espectral entre el cometa y dos condritas carbonáceas sin agrupar, lo que permite hacernos una idea sobre la composición heterogénea de la superficie de un cometa de periodo corto.
To understand the solar system in its current form, and the formation of the planets, small bodies play a key role. The composition of asteroids and comets provides the clues about the birth of the solar system and its evolution. Small undifferentiated bodies contain the first solid materials of the Solar System, formed from the aggregation and melting of primordial dust. From these primordial building blocks much larger bodies such as asteroids, comets and planets were formed. Rocky bodies with a size of few hundreds of kilometers experienced chemical segregation due to differentiation, but the smaller ones irradiated the internal heat and never melted. These undifferentiated bodies have preserved pristine materials that were forming the protoplanetary disk. These materials are hosted by undifferentiated meteorites. The meteorites coming from these objects, known as chondrites, are samples of materials formed in the protoplanetary disk around the Sun about 4,600 million years ago. Among them, the carbonaceous chondrites are the only available samples representing carbonaceous asteroids which are important to understand their physical properties and for future comparison with samples returned by Hayabusa 2 and OSIRIS-Rex missions. This thesis focuses on the chemical composition, mineralogy, as well as the physical and mechanical properties of Solar System small bodies through laboratory measurements of their meteorites. Several techniques described here allow the study of the properties of chondrites, and therefore provide clues about the complex accretionary histories of their parent bodies. The mineralogical changes associated with thermal metamorphism, aqueous alteration, or to the effects of shock in chondrites are described here in the context of getting clues about their possible parent asteroids. Besides, spectroscopic techniques are applied as a suitable method to link the meteorite samples to specific asteroids, although an unambiguous association will require to complete future sample return missions. In the first part of the work, the reflectance spectra of two chemically-related carbonaceous chondrites groups, precisely the CVs and CKs are measured and compared. The reflective properties of these two chondrite groups and the comparison with the Cg asteroid reflectance class supports a common formation scenario. Asteroids have been exposed to impacts since their formation, and as a consequence their surfaces are covered by small particles, pebbles, and boulders. The Japanese JAXA Hayabusa mission collected particles from the regolith of asteroid 25143 Itokawa. Laboratory studies of these particles provide a scientific opportunity as their physical properties can be compared with those characteristic of chondrites that can be considered proxies of the building materials of potentially hazardous asteroids (PHAs). In the second part of the thesis the results from a study of the mechanical properties of three of these particles using a precise technique called nanoindentation are presented. Finally, the properties of dark bodies associated with evolved comets are studied. In that sense, comet 2P/Encke is one of the largest object of the so-called Taurid complex. Its spectral behaviour makes it similar to pristine carbonaceous asteroids, but little was known about its real nature. In this work a good spectral match between this comet and two ungrouped chondrites has been found, allowing us to make a first-guess about the heterogeneous composition of the surface of a short-period comet.
Cerón, Loayza Maria Luisa. "“Estudio y caracterización de meteoritos peruanos”." Master's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/8205.
Full textLos temas de investigación de esta tesis son muestras de meteoritos que han sido poco estudiadas en el Perú por técnicas físicas de caracterización. Esto motiva la elaboración de un proyecto con objetivos definidos para las muestras seleccionadas, enfatizando la determinación de su composición elemental, mineralógica y morfológica, así como de sus fases estructurales. En parte, estas muestras son recolectadas in situ en el área de impacto de un meteorito en Carancas, Puno, desde el cráter y el área adyacente. Las otras muestras estudiadas pertenecen a una colección del Museo de Historia Natural de la Universidad Nacional Mayor de San Marcos (UNMSM), Lima, Perú. Los resultados de los análisis de las muestras relacionadas con el meteorito de Carancas mediante fluorescencia de rayos X en energía dispersiva (FRXED) permiten contrastar la composición elemental de los residuos del propio meteorito con las muestras de suelo del cráter. Mediante difractometría de rayos X (DRX) se observa la presencia de fases mineralógicas como troilita (FeS), ringwoodita (Rw, (Mg, Fe)2 SiO4), olivino (Fe, Mg) 2SiO4 y piroxeno ((Mg, Ca, Mn, Fe) Si2O6). Los análisis por espectroscopía Mössbauer de transmisión (EMT) a temperatura ambiente (TA) permiten observar dos sextetos magnéticos, uno de ellos asignado a taenita (Fe-Ni) y el otro a troilita, y dos dobletes paramagnéticos asignados a Fe2 +: D1, asignados a olivino, y el otro, D2, a piroxeno. Los análisis de los espectros tomados a temperatura de helio líquido (THL) son una tarea compleja y permiten resolver la presencia de: a) dos componentes magnéticos de Fe3 + asociados a troilita (I) y troilita (II), dos componentes metálicos atribuidos a fases de Fe-Ni, que se asocian por una parte a la taenita cristalográficamente ordenada (tetrataenita) con Bhf= 34,5 T, y por otra parte a la taenita en una fase desordenada con Bhf = 38,8 T respectivamente, y c) una singlete S1 que es asignado a la antitaenite. Los resultados de los análisis de las muestras de suelo recogidas del cráter de Carancas y área adyacente (M1, M2 y M3) por el FRXED, DRX y EMT (TA y THL) informan transformaciones de fase que indican la presencia de elementos y minerales de impacto como coesita y stishovita (fases de SiO2). La presencia de estas fases de SiO2 en el suelo del cráter refuerza la hipótesis de su origen por el metamorfismo inducido por el impacto del meteorito. Además, se observa la presencia de sextetos magnéticos asignados al óxido de hierro: hematita y tres dobletes paramagnéticos, dos de ellos, D1 y D2, asignados a sitios de catión de Fe2 + y Fe3 + en illita y / o montmorillonita, respectivamente, y D3 asignado a un Fe3 + sitio de cationes aún no identificado. Los resultados de los análisis de ocho muestras de posibles meteoritos recogidos del Museo de Historia Natural (MHN) por las técnicas citadas revelan que no corresponden a muestras meteoriticas, sin embargo algunas de las muestras corresponden a piedras pelíticas magnéticas y otras son de impacto debido a la presencia de coesita y stishovita, así como de ringwoodita, que son polimorfo de olivino. Todos estos minerales se originan solo a través de un proceso de impacto meteorítico. Cabe mencionar que para una de éstas muestras del MHN-03 hubo necesidad de aplicar la técnica de Mössbauer por la modalidad de dispersión.
Universidad Nacional Mayor de San Marcos (Lima). Vicerrectorado de Investigación y Posgrado
Tesis
Silva, Dailto 1960. "A mobilidade dos elementos traço e geração de fusão félsica na crosta durante o impacto de meteoritos : implicações para a evolução da crosta hadeana." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287218.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociências
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Resumo: A pesquisa foi realizada na cratera de impacto de meteorito de Araguainha (Goiás / Mato Grosso, Brasil) e compreendeu três desenvolvimentos científicos principais. O primeiro engloba a petrografia e geoquímica de rochas graníticas parcialmente fundidas do núcleo da cratera de impacto. Foi possível separar, por petrografia e posicionamento geográfico, os litotipos do granito preservado (GP) dos litotipos de fusão (granito parcialmente fundido (GPF), veios de fusão (VF) e capa de fusão (CF)). Contudo, estes litotipos apresentam características geoquímicas muito semelhantes para elementos maiores, menores, traços e terras raras. O diagrama que se mostrou o melhor discriminante entre os litotipos de fusão e os granitos preservados foi o Th/U x TiO2, que indica enriquecimento relativo na razão Th/U nos granitos. O granito preservado é também rico em quartzo e apresenta empobrecimento em elementos como Ti, Zr, Ce, Y, Eu, Nb e elementos terras raras. Essas características permitem postular uma possível influência hidrotermal na geração dos litotipos de fusão. O segundo desenvolvimento aborda a mobilidade dos elementos traço e geração de fusões félsicas na crosta terrestre durante o impacto de meteoritos e implicações para a evolução da crosta Hadeana. Nesse caso, o processo de acresção crustal por impacto pode ser um mecanismo complementar, capaz de explicar uma importante modificação da crosta terrestre Hadeana ocorrida entre 3.9-4.5 Ga. O terceiro desenvolvimento trata dos efeitos do impacto na indução de fusão incongruente da crosta da Terra, tendo como base a fusão da biotita. O estudo mostrou que a biotita pré-impacto é distinta daquela pós-impacto, com texturas, estrutura e quimismo contrastantes. Demonstrou-se que até 9% do granito de Araguainha é produto de cristalização a partir da quebra da biotita. A biotita funde incongruentemente durante o processo de impacto, produzindo uma fusão aluminosa, que preenche bolsões e rede de fraturas nas rochas. Impactos do tamanho de Araguainha ou maiores são capazes de gerar volumes substanciais de fundidos aluminosos na crosta
Abstract: The focus of this PhD thesis is on granitic targets impacted by meteorites and felsic melting generation in the crust during impacts. Key features of the Araguainha impact crater (Goiás / Mato Grosso, Brazil) were employed as a control. Field, petrographic and analytical data collected in the study area were grouped into three, central scientific developments. The first comprises the petrography and geochemistry of partially melted granitic rocks observed in the core of the Araguainha crater. The work shows that it is possible to separate, by petrography and geographical positioning, preserved granite rocks from melt rock types, such as the partially melted granite (GPF), the melted veins (VF), and the melted caps (CF). These rock types have very similar geochemical characteristics regarding major, minor, trace and rare earth elements. However, melt rock types are readily discriminated from preserved granites in Th/U x TiO2 scatergrams; granites show relative enrichment in the ratio Th/U. Another noteworthy feature is that the preserved granite rich in quartz is depleted in Ti, Zr, Ce, Y, I, Nb and REE, indicating a possible influence of hydrothermal systems in the formation of melt products. The second development provides clues on the mobility of trace elements and generation of felsic melts in the crust during the meteorite impact, and implications for the evolution of the Hadean crust. It is argued that process of crustal accretion by impacts may have been one of the mechanisms that can explain important modification of the Earth's crust during the Hadean (3.9-4.5 Ga). The third development deals with the effects of shock-induced incongruent melting within Earth's crust, using the case of biotite melting. It was demonstrated that pre-impact and pos-impact biotites found in Araguainha show distinct textures, structures and chemistry. Results show that up to 9% of Araguainha granite is a product of magma crystallization from breakdown of biotite. The biotite melts incongruently during the impact process, producing an aluminous fusion, which fulfills pockets and fracture networks of the rocks. Impacts of the size of Araguainha or larger seem to be capable of generating substantial amounts of aluminous melt in the crust
Doutorado
Geologia e Recursos Naturais
Doutor em Ciências
Pucheta, Flávia Noelia. "Estudo petrográfico, metalográfico e geoquímico dos meteoritos Bocaiuva e João Pinheiro – Minas Gerais." Programa de Pós-Graduação em Evolução Crustal e Recursos Naturais. Departamento de Geologia. Escola de Minas, Universidade Federal de Ouro Preto, 2010. http://www.repositorio.ufop.br/handle/123456789/3353.
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Os meteoritos foram considerados durante muito tempo como meras curiosidades. De fato, foi só depois de Jean Baptiste Biot (1774 - 1862) estudar o meteorito da Águia, que caiu no norte da França em 1803, que a natureza extraterrestre dessas rochas foi claramente estabelecida (Gounelle 2006). Ainda assim, o local de origem dos meteoritos no Sistema Solar só pôde ser definitivamente identificado após a determinação da órbita do meteorito Pribram, que caiu em 7 de abril de 1959 na República Tcheca. Entretanto, nos últimos anos, o interesse no estudo dos meteoritos aumentou enormemente, isto aconteceu, basicamente, porque foi reconhecido que essas rochas são os objetos mais antigos que o homem já encontrou, guardando registros das várias etapas da formação do Sistema Solar. O Brasil possui 58 meteoritos devidamente catalogados pela Ciência Meteorítica, número bastante inferior comparados com países da Europa e os Estados Unidos. A coleção de meteoritos do exMuseu de Mineralogia Professor Djalma Guimarães - MMPDG, situada em Belo Horizonte, possui dezessete meteoritos, dentre eles dez são brasileiros. O meteorito Bocaiúva, encontrado em Minas Gerais, pesando 64kg, foi achado em 1965, na cidade de Bocaiúva, a 400km da capital do estado, Belo Horizonte. Porém somente no final do ano de 2006 foi entregue ao MMPDG e hoje se encontra em exposição. Além da massa principal do meteorito Bocaiuva, também há outro fragmento catalogado como “meteorito Bocaiuva”, de aspecto totalmente metálico. Segundo a bibliografia existente do meteorito Bocaiuva ele possui regiões silicatadas de até 1cm de diâmetro, claramente observadas a olho nu. Ele é considerado um meteorito raro por conter uma significativa quantidade de silicatos em uma matriz metálica, composta basicamente por Fe e Ni. As diferenças macroscópicas observadas entre a massa principal do meteorito Bocaiuva e os fragmentos catalogados como tal, levam a duas hipóteses: ambos pertencem ao mesmo corpo parental com características distintas das relatadas na literatura ou o pequeno fragmento catalogado como Bocaiúva é na verdade pertencente a outro meteorito. Portanto foram realizados diversos estudos, abrangendo as microestruturas; a mineralogia (minerais opacos e transparentes) e a geoquímica de ambos os meteoritos. Foram utilizadas diversas técnicas de análise laboratorial como Microscopia Óptica e Eletrônica, Espectrometria de Absorção no Infravermelho, Catodoluminescência, Difração de Raios X, Espectrometria de Emissão Óptica com Plasma Acoplado - (ICP-OES) e Espectroscopia de Emissão Óptica com Plasma Induzido por Laser - LIBS De acordo com os resultados obtidos, os fragmentos catalogados como meteorito Bocaiuva, pertencem na verdade ao meteorito João Pinheiro, nunca catalogado pela Ciência. Além do mais, no meteorito Bocaiuva foram descobertas inclusões fluidas e fundidas nunca observadas por outros pesquisadores. ________________________________________________________________________________
ABSTRACT: The meteorites were long considered as mere curiosities. In fact, it was only after Jean Baptiste Biot (1774 - 1862) to study the meteorite's Eagle, who fell in northern France in 1803, the extraterrestrial nature of these rocks has been clearly established (Gounelle 2006). Still, the place of origin of meteorite in the solar system could only be definitively identified after the determination of the orbit of Pribram meteorite, which fell on April 7, 1959 in the Czech Republic. However, in recent years, the interest in the study of meteorites has increased enormously, this has happened, basically, because it was recognized that these rocks are the oldest objects ever found that man, keeping records of the various stages of formation of the Solar System. Brazil has 58 meteorites properly cataloged by meteoric science, low number compared with European countries and the United States. The collection of meteorites from the exMuseum of Mineralogy Professor Djalma Guimarães - MMPDG, located in Belo Horizonte, has seventeen meteorites, among them ten are Brazilian. The Bocaiúva meteorite, found in Minas Gerais, weighing 64kg, was found in 1965 in the town of Bocaiuva, 400km from the state capital, Belo Horizonte. But only at the end of 2006 was delivered to MMPDG and is today on display. Besides the main mass of meteorite Bocaiuva, there is also another fragment cataloged as "meteorite Bocaiuva" aspect of all metal. According to the literature about the Bocaiuva meteorite, it has silicate regions up to 1cm in diameter, clearly visible to the naked eye. He is considered a rare meteorite to contain a significant amount of silicates in a metal matrix, composed mainly of Fe and Ni. Macroscopic differences observed between the main mass of the Bocaiuva meteorite and fragments cataloged as such, leads to two hypotheses: both belong to the same parent body with different characteristics than those reported in the literature or the small fragment cataloged as Bocaiuva is actually owned by another meteorite. Therefore was done several studies, including the microstructures, mineralogy (mineral opaque and transparent) and the geochemistry of both meteorites. Several techniques of laboratory analysis and Optical and Electron Microscopy, Infrared Absorption Spectrometry, Cathodoluminescense, Ray X Diffraction, Optical Emission Spectroscopy Coupled Plasma (ICP-OES) and Optical Emission Spectroscopy with Laser Induced Plasma (LIBS). According to the results, the meteorite fragments cataloged as Bocaiuva, actually belong to the meteorite João Pinheiro, never cataloged by science. Moreover, in the meteorite Bocaiuva fluid inclusions and melt inclusion were discovered ever observed by other researchers.
Aravena, González Claudia Samanta. "Inclusiones vítreas en condritos carbonáceos del Desierto de Atacama, Región de Antofagasta, Chile." Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/170659.
Full textAraújo, Acácio José Silva. "Metodologia para caracterização geoquímica de meteoritos de ferro utilizando a fluorescência de raios x portátil." Instituto de Geociências, 2018. http://repositorio.ufba.br/ri/handle/ri/25907.
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Meteoritos são amostras provenientes do espaço que chegam à superfície da Terra após vagarem pelo espaço. Trazem consigo preciosas informações sobre a formação do Sistema Solar e os primeiros momentos na formação e evolução do Planeta. Por sua raridade e importância, o estudo de meteoritos requer técnicas analíticas não destrutivas que permitam conhecer o material sem destruí-lo. Neste sentido, o avanço nos equipamentos e metodologias relacionadas à Fluorescência de Raios-X tem sido bastante promissor. O presente estudo traz uma avaliação das possibilidades de utilização da técnica de Fluorescência de Raios X portátil (PFRX) e seus impactos nas análises litogeoquímicas para determinações qualitativas e quantitativas de elementos maiores e traços em vários tipos de meteoritos férreos. O instrumento utilizado foi o S1 TITAN da BRUKER, com peso total de 1,5 kg, cujo sistema é composto por um tubo de Raios X, com anodo de Ródio (Rh) de 4W, 15-50kV, 5-100μA e um detector FAST SDD (Silicon Drift Detector) refrigerado a ar, onde sua operação é baseada no “Efeito Peltier”. Foi utilizada uma base de sustentação para estabilização do equipamento durante as leituras e o software utilizado foi o de análises em metais. Propomos aqui uma metodologia analítica baseada em leituras sequenciais e sistemáticas de superfícies polidas destas amostras e um tratamento estatístico para reduzir os erros e aumentar a confiabilidade e precisão das análises. O procedimento de verificação da calibração do equipamento utilizou amostras de referência contendo FeS (sulfeto férrico) e Cu (ânodo de cobre), cedidos pelo Grupo Paranapanema, e com laudo analítico por ICP-OES e WFRX de Bancada. Meteoritos de ferro - Bendegó, Vitória da Conquista, Palmas de Monte Alto e Patos de Minas – da coleção Wilton Carvalho atualmente sob a responsabilidade do Museu Geológico da Bahia foram selecionados para o estudo por serem espécimes com maior disponibilidade de massa e por já terem sido analisados previamente por métodos de analise geoquímica já consagrados no estudo de meteoritos. O objetivo deste critério de seleção foi permitir a comparação entre análises por diferentes técnicas e a fluorescência portátil. Os resultados obtidos através das análises utilizando a PFRX foram plotados em planilha eletrônica (EXCEL) e processados estatisticamente tornando possível testar hipóteses e desenvolver um protocolo analítico que permite contribuir para os avanços na meteorítica e viabilizar o uso da técnica de Fluorescência de Raios X portátil na caracterização de meteoritos férreos.
ABSTRACT - Meteorites are samples of space that reach the Earth's surface after wandering through space. They bring precious information about the formation of the Solar System and the first moments in the formation and evolution of the Planet. For its rarity and importance, the study of meteorites required non-destructive analytical that allow to know the material without destroying it. In this sense, the advance in equipment and methodologies related to X-ray Fluorescence has been very promising. The present study provides an assessment of the possibilities of using the portable X - ray fluorescence technique (PFRX) and its impacts on the litogeochemical analyzes for qualitative and quantitative determinations of larger documents and traces in various types of ferrous meteorites. The instrument used for BRUKER S1 TITAN, with a total weight of 1,5 kg, which system is composed of an X-ray tube, with Rhodium (Rh) anode of 4W, 15-50kV, 5-100μA and a detector FAST SDD (Silicon Traction Detector) air-cooled, where its operation and not "Peltier Effect". A support base was used to stabilize the equipment during the development and use of software used in metal analysis. We propose here a real-time analytical methodology in sequential and systematic readings of polished surfaces and samples for a statistical treatment to reduce errors and increase the reliability and precision of the analyzes. The procedure to verify the calibration of the equipment used in reference samples, containing FeS (ferric sulphide) and Cu (copper anode), provided by the Paranapanema Group, and analytical analyzer by ICPOES and WFRX de Bancada. Iron meteorites - Bendegó, Vitória da Conquista, Palmas de Monte Alto and Patos de Minas - from the collection Wilton Carvalho in singleton under the responsibility of the Geological Museum of Bahia were selected for the study par excellence of greater availability of mass and for having already been analyzed Previously by methods of geographic analysis already consecrated without meteorite study. The objective of this selection criterion is to allow comparison between analyzes by different techniques and portable fluorescence. The results obtained through the analyzes using PFRX were plotted in a spreadsheet (EXCEL) and processed statistically making it possible to test hypotheses and the development of an analytical protocol that allows to contribute to the advances in the meteorology and to make possible the use of the technique of portable X-ray fluorescence in the characterization of ferrous meteorites. Keywords: Handheld X-Ray Fluorescence; litogeochemical; iron meteorites.
Ramos, Ruiz Adrián. "Centro de Investigación y Difusión Meteorítica." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/170057.
Full textValenzuela, Picón Edith Millarca. "Procesos de Meteorización en Condritos Ordinarios del Desierto de Atacama, Norte de Chile: Nuevos Antecedentes sobre Meteorización de Material Extraterrestre en Ambientes Desérticos." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/102591.
Full textSmith, Toby Russell. "Impact crater particulates : microscopic meteoritic material surrounding meteorite craters /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/5434.
Full textBooks on the topic "Meteoritos"
Gladysheva, O. G. Tungusskai︠a︡ katastrofa: Detali golovolomki. Sankt-Peterburg: "Nauka", 2011.
Find full textRétyi, Andreas von. Meteorite, Boten aus dem Weltall. 2nd ed. Coburg: Naturkunde-Museum Coburg, 1996.
Find full textBarakat, Aly A. The precious gift of meteorites and meteorite impact processes. Hauppauge, N.Y: Nova Science Publishers, 2011.
Find full textMcSween, Harry Y. Meteorites and their parent planets. Cambridge [Cambridgeshire]: Cambridge University Press, 1987.
Find full textMcSween, Harry Y. Meteorites and their parent planets. Cambridge: Cambridge University Press, 1987.
Find full textCevolani, Giordano. Fermo: La meteorite, l'ultima pietra celeste del secondo millennio. Fermo (Ascoli Piceno): Zefiro books, 2005.
Find full textSavichev, A. A. Patomskiĭ krater: Nauchnye issledovanii︠a︡ v XXI veke. Irkutsk: IGU, 2011.
Find full textZhuravlev, V. K., and B. U. Rodionov. Sto let Tungusskoĭ probleme: Novye podkhody : sbornik stateĭ. Moskva: Binom--Laboratorii︠a︡ znaniĭ, 2012.
Find full textMonod, Théodore. Le fer de Dieu: Histoire de la météorite de Chinguetti. Le Méjean, Arles: Actes Sud, 1992.
Find full textAmbrose, David. Catalogue of stones from the strewn field of the Thuathe meteorite of 21 July 2002. Roma, Lesotho: House 9 Publications, 2003.
Find full textBook chapters on the topic "Meteoritos"
Heide, F., and F. Wlotzka. "Introduction." In Meteorites, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57786-4_1.
Full textHeide, F., and F. Wlotzka. "Fall Phenomena." In Meteorites, 5–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57786-4_2.
Full textHeide, F., and F. Wlotzka. "The Meteorites." In Meteorites, 97–168. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57786-4_3.
Full textHeide, F., and F. Wlotzka. "The Origin and Formation of Meteorites." In Meteorites, 169–201. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57786-4_4.
Full textHeide, F., and F. Wlotzka. "Appendix." In Meteorites, 203–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-57786-4_5.
Full textWeisberg, Michael K. "Meteorites." In Encyclopedia of Earth Sciences Series, 1–9. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-39193-9_331-1.
Full textWeisberg, Michael K. "Meteorites." In Encyclopedia of Earth Sciences Series, 917–24. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-39312-4_331.
Full textOkrusch, Martin, and Hartwig E. Frimmel. "Meteorites." In Springer Textbooks in Earth Sciences, Geography and Environment, 583–603. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-57316-7_31.
Full textRobert, François. "Meteorites." In Encyclopedia of Astrobiology, 1–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_975-2.
Full textRobert, François. "Meteorites." In Encyclopedia of Astrobiology, 1539–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_975.
Full textConference papers on the topic "Meteoritos"
Schechtel Kodum, Karuane, Antonio Liccardo, and Sérgio da Costa Saab. "COMPARAÇÃO DA TÉCNICA DE EDS DOS EQUIPAMENTOS DE FRX E MEV-FEG ATRAVÉS DA CARACTERIZAÇÃO DE METEORITOS." In XXI Semana da Física. Ponta Grossa, Paraná: Even3, 2018. http://dx.doi.org/10.29327/xxifisica.128791.
Full textFlynn, George J., Daniel D. Durda, Mason J. Molesky, Brian A. May, Spenser N. Congram, Colleen L. Loftus, Jacob R. Reagan, Melissa M. Strait, and Robert J. Macke. "Momentum transfer in hypervelocity cratering of meteorites and meteorite analogs: Implications for asteroid deflection." In 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-028.
Full textSipiera, Paul P., Richard B. Hoover, and Gregory A. Jerman. "Meteorites and microbes: meteorite collection and ice sampling at Patriot Hills, Thiel Mountains, and South Pole, Antarctica." In International Symposium on Optical Science and Technology, edited by Richard B. Hoover. SPIE, 2000. http://dx.doi.org/10.1117/12.411617.
Full textMoura, Rui, Ana Cristina Pires, Vitor Martins, Maria Cristina Marques, Ana Caldeira, Ivan Sa, and Diogo Machado. "MIFIRE- A PLANETARY GEOLOGY AND GEOPHYSICS RESEARCH PROJECT USING A SUBORBITAL MICROGRAVITY SPACEFLIGHT." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023/1.1/s05.69.
Full textRoca Cladera, Josep, and Blanca Arellano Ramos. "La distribución del tamaño de las ciudades: la Ley de Zipf revisitada." In International Conference Virtual City and Territory. Mexicali: Universidad Autónoma de Baja California, 2010. http://dx.doi.org/10.5821/ctv.7629.
Full textZhang, Yiheng, Xuhai Tang, Jingjing Xu, and Quansheng Liu. "Investigating the Minerals and Laboratory-Scale Property of Planetary Rocks Using AGBM." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0412.
Full textHoover, Richard B. "Microfossils in carbonaceous meteorites." In SPIE Optical Engineering + Applications, edited by Richard B. Hoover, Gilbert V. Levin, Alexei Y. Rozanov, and Kurt D. Retherford. SPIE, 2009. http://dx.doi.org/10.1117/12.832643.
Full textAmari, Sachiko, and Ernst Zinner. "Supernova grains from meteorites." In ASTROPHYSICAL IMPLICATIONS OF THE LABORATORY STUDY OF PRESOLAR MATERIALS. ASCE, 1997. http://dx.doi.org/10.1063/1.53330.
Full textHoover, Richard B. "Meteorites, microfossils, and exobiology." In Optical Science, Engineering and Instrumentation '97, edited by Richard B. Hoover. SPIE, 1997. http://dx.doi.org/10.1117/12.278766.
Full textNash, Bill. "Meteorites of New Mexico." In 24th Annual New Mexico Mineral Symposium. Socorro, NM: New Mexico Bureau of Geology and Mineral Resources, 2003. http://dx.doi.org/10.58799/nmms-2003.268.
Full textReports on the topic "Meteoritos"
Herd, R., and D. Thibault. The St-Robert meteorite. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/226113.
Full textFarley, Karla. Classification of Four Meteorite Samples. Portland State University Library, January 2014. http://dx.doi.org/10.15760/honors.100.
Full textZellner, N. Shock Chemistry of Sugars and Implications for Delivery by Meteorites. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/15009735.
Full textPonganis, K. V., B. Lavielle, B. Spettel, V. F. Buchwald, K. Nishiizumi, M. W. Caffee, and K. Marti. A New IAB Lab Iron Meteorite from China. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/15013415.
Full textFurnish, M. D., G. T. III Gray, and J. L. Remo. Dynamical behavior of octahedrite from the Henbury meteorite. Office of Scientific and Technical Information (OSTI), August 1993. http://dx.doi.org/10.2172/10179576.
Full textCuadra, Jefferson A., Kavan Hazeli, K. T. Ramesh, and Harry Martz. In-situ X-ray CT results of damage evolution in L6 ordinary chondrite meteorites. Office of Scientific and Technical Information (OSTI), June 2016. http://dx.doi.org/10.2172/1321441.
Full textLawrence, R. Jeffery, John L. Remo, and Michael David Furnish. Soft x-ray shock loading and momentum coupling in meteorite and planetary materials. Office of Scientific and Technical Information (OSTI), December 2010. http://dx.doi.org/10.2172/1005079.
Full textBecker, L., J. L. Bada, R. E. Winans, J. E. Hunt, T. E. Bunch, and B. M. French. The discovery of fullerenes in the 1.85 billion-year-old Sudbury meteorite crater. Office of Scientific and Technical Information (OSTI), February 1996. http://dx.doi.org/10.2172/191550.
Full textTurner, B., M. Quat, M. Boiridy, R. Debicki, and P. Thurston. A.Y. Jackson Lookout, Greater Sudbury: High Falls and Greater Sudbury's famous meteorite crater. Natural Resources Canada/CMSS/Information Management, 2015. http://dx.doi.org/10.4095/329881.
Full textTurner, B., M. Quat, M. Boiridy, R. Debicki, and P. Thurston. Dynamic Earth, Greater Sudbury: ancient seafloor, meteorite-blasted rock, ice age sculpture and Greater Sudbury's smelter. Natural Resources Canada/CMSS/Information Management, 2015. http://dx.doi.org/10.4095/329900.
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