Cosmogeochemistry: Direct Analysis of Meteorites
نویسندگان
چکیده
extreme challenge because of the limited sample amount available combined with possible contamination and chemical modification during sample storage and processing (1, 2). In general, many grams of meteorite material are required and their chemical analysis is laborious, often involving a series of extraction, purification, and identification steps (1, 3). We report here a new method for the direct analysis of meteorites, which is nondestructive from a mineralogical standpoint and requires only milligram quantities of meteorite material. It is based
منابع مشابه
Petrology and geochemistry of whole rock of Shahdad meteorites
In this study, meteorite pieces, with total weight of 259 grams, have been studied which is not listed in the world bulletin of meteorites. In order to classify these samples, after preparing microscopic thin sections and performing accurate petrography, using geochemical data of the major elements and trace elements of whole rock, obtained from XRF and ICPMS methods in Zarazma company’s labora...
متن کاملShock-transformation of whitlockite to merrillite and the implications for meteoritic phosphate
Meteorites represent the only samples available for study on Earth of a number of planetary bodies. The minerals within meteorites therefore hold the key to addressing numerous questions about our solar system. Of particular interest is the Ca-phosphate mineral merrillite, the anhydrous end-member of the merrillite-whitlockite solid solution series. For example, the anhydrous nature of merrilli...
متن کاملPetrologic Comparisons of Lunar Mare Basalt Meteorites Dh-287A and NWA
Introduction: It is intriguing that the majority of lunar meteorites (~30) have been discovered in the hot deserts of Middle-East and North Africa. In contrast, of 10s of thousands of meteorite finds from Antarctica over 30 years, only a handful (~5) are lunar. This bias towards the lunar meteorite recovery from the hot deserts may be due to the preferential fall of lunar meteorites in these re...
متن کاملMars Science Laboratory Search for Organics: Potential Contribution from Infall of Meteorites
Introduction: A major goal of the Mars Science Laboratory (MSL) mission is to search for past and present habitable environments at Gale crater [1]. To achieve this goal MSL has, in particular, the capability to detect complex organic molecules in rocks and soils using the Sample Analysis at Mars instrument (SAM). A primary goal of the SAM investigation is to carry out a search for organic comp...
متن کاملCombining meteorites and missions to explore Mars.
Laboratory studies of meteorites and robotic exploration of Mars reveal scant atmosphere, no evidence of plate tectonics, past evidence for abundant water, and a protracted igneous evolution. Despite indirect hints, direct evidence of a martian origin came with the discovery of trapped atmospheric gases in one meteorite. Since then, the study of martian meteorites and findings from missions hav...
متن کامل