Introduction: Asteroidal fragments in lunar breccias and soils are critical to an understanding of the nature of the major impactors of the Moon. Observing FeNi metal is typically the simplest way for identifying asteroidal fragments. Schreibersite [(Fe,Ni) 3 P] in FeNi metal is a clear indicator of asteroidal contamination , although this was validated only after the realization that schreiber...

CHONDRITE PARENT BODY. A. Wittmann, J. R. Weirich, T. D. Swindle, D. Rumble III, and D. A. Kring Lunar & Planetary Institute, Houston, TX. 77058, [email protected], [email protected], Lunar & Planetary Laboratory, University of Arizona, Tucson, AZ 85721, [email protected], [email protected]. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, drumb...

EXTRATERRESTRIAL CHROMITE GRAINS FROM SWEDEN AND CHINA: DEBRIS OF THE L CHONDRITE PARENT ASTEROID BREAKUP P. R. Heck, T. Ushikubo, B. Schmitz, N. T. Kita, M. J. Spicuzza and J. W. Valley, Wisc-SIMS, Department of Geology and Geophysics, University of Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA, [email protected], Department of Geology, University of Lund, Sölvegatan 12, SE-22362 Lund, ...

The new metal-enriched anomalous chondrite Sierra Gorda 013 (SG 013) contains two different lithologies. Lithology 1 (L1) is represented by CBa-like material containing ~80 vol% of Fe,Ni-metal particles and globules up to 6 mm in size; chondrules clasts types POP, BO, SO (up 5 diameter); rare sulfides; shock melted silicate–metal areas. It does not contain any fine-grained matrix. Several chrom...

Crystals of halite and sylvite within the Monahans (1998) H5 chondrite contain aqueous fluid inclusions. The fluids are dominantly sodium chloride-potassium chloride brines, but they also contain divalent cations such as iron, magnesium, or calcium. Two possible origins for the brines are indigenous fluids flowing within the asteroid and exogenous fluids delivered into the asteroid surface from...

Raman spectroscopy and scanning electron microscopy methods were used to study the fragment of Markovka (H4 chondrite) meteorite. A characteristic set silicate minerals (olivine pyroxene), oxides hydroxides (maghemite goethite), troilite, carbonates (aragonite) was determined. The structural features revealed by allow us draw important conclusions on thermal history parent body including both t...