Mineralogy and petrogenesis of lunar magnesian granulitic meteorite Northwest Africa 5744
نویسندگان
چکیده
منابع مشابه
Mafic Granulitic Impactite Northwest Africa 3163: a Unique Meteorite from the Deep Lunar Crust
Petrology and Mineral Compositions: The fresh, pale gray interior of this specimen has multiple shock fractures (with very minor calcite coatings) and some thin glass veinlets (Figure 2). This rock is a poikiloblastic recrystallized breccia, with larger grains of plagioclase (~70%) enclosing much smaller grains (less than 100 microns across) of pyroxene (~20%), olivine (~10%) and accessory Ti-c...
متن کاملPetrogenesis of lunar meteorite EET 96008
Lunar meteorite EET 96008 is a fragmental breccia that predominantly consists of basaltic mineral clasts (0.5–2 mm), along with minor lithic fragments and breccia clasts. The matrix consists mainly of smaller mineral fragments ( 0.5 mm), bound by glassy cement, the majority of which are pyroxene and plagioclase. The pyroxene possesses extensive exsolution lamellae. These lamellae, up to 1 m in ...
متن کاملEXPOSURE HISTORY OF LUNAR METEORITE NORTHWEST AFRICA 5000. K. Nishiizumi,
Caffee, N. Vogel, R. Wieler, M. D. Leclerc, and A. J. T. Jull, Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USA ([email protected]), Department of Physics, Purdue University, West Lafayette, IN 47907-1396, USA ([email protected]), ETH-Zürich, CH-8092, Switzerland ([email protected], [email protected]), NSF Arizona AMS Facility, University of Arizona, Tuc...
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 کاملPetrogenesis of the Northwest Africa 4898 high-Al mare basalt
Northwest Africa (NWA) 4898 is the only low-Ti, high-Al basaltic lunar meteorite yet recognized. It predominantly consists of pyroxene (53.8 vol%) and plagioclase (38.6 vol %). Pyroxene has a wide range of compositions (En12–62Fs25–62Wo11–36), which display a continuous trend from Mg-rich cores toward Ca-rich mantles and then to Fe-rich rims. Plagioclase has relatively restricted compositions (...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2017
ISSN: 1086-9379,1945-5100
DOI: 10.1111/maps.12898