Spade: An H chondrite impact-melt breccia that experienced post-shock annealing
نویسندگان
چکیده
منابع مشابه
Post-shock Annealing and Post-annealing Shock: Implications for the Thermal and Shock Histories of Ordinary-chondrite Parent Bodies
A common view of the thermal and shock histories of ordinary-chondrite (OC) parent bodies is that, for the most part, thermal and shock metamorphism were distinguishable and successive events; e.g., the decay of 26 Al heated chon-dritic planetesimals and subsequent impacts produced various shock effects. Although collisions have long been acknowledged as capable of producing significant heating...
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Introduction: Impact melts resulting from craterproducing impacts on asteroids can be used to understand the collisional evolution of our solar system. Part of that analysis includes an assessment of the cooling rates of the impact melts and/or the locations where the melts are deposited. In this study, we examined LAP 04751 [1], which is an impact melt breccia that came from the H-chondrite pa...
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J. McCoy, R. C. Greenwood, and I. A. Franchi. University of Arizona, Lunar and Planetary Laboratory (LPL), Tucson, AZ 85721, USA, ([email protected]), Dept. Physical Sciences, Kingsborough Community College of the City University of New York, 2001 Oriental Blvd., Brooklyn N.Y. 100235, USA, and the Dept. of Earth and Environmental Sciences, The Graduate Center of CUNY, Dept. Earth and Pla...
متن کاملLunar Meteorite Dhofar 026: a Shocked Granulitic Breccia, Not an Impact Melt
Introduction: Lunar meteorite Dhofar 026 was previously interpreted as an impact melt [1, 2]. Detailed studies of the rock and comparison to Apollo lunar samples 15418 and 60017 indicate that the rock instead is a shocked, partly melted, granulitic breccia. These studies, presented by [3], are summarized herein. Petrology of Dhofar 026: Most of the rock consists of blocky patches of monomineral...
متن کاملClast-rich H-chondrite Impact Melts
Introduction: The H-chondrite parent asteroid provides the second-most abundant type of meteorites that currently reach Earth's surface [1]. These rocks recorded their parent asteroid's collisional history and melted H-chondrites chronicle the most severe cratering events. Samples and Methods: Seven samples of clast-rich impact melt rocks from the La Paz Icefield, Antarctica were analyzed in Pl...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2003
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2003.tb00254.x