2. Meteoritic Magnetism: Implications for Parent Bodies of Origin

Differentiation of Metal-rich Meteoritic Parent Bodies

Introduction: There is now increasing evidence that the timescale between the formation of CAIs and of chondrules is < 1-2 Ma, and that the achondritic parent planets may have formed and differentiated within 2-4 Ma of the origin of the Solar System [1,2]. Long-lived chronometers (such as 187 Re

Meteoritic Parent Bodies: Their Number and Identification

Extensive collection efforts in Antarctica and the Sahara in the past 10 years have greatly increased the number of known meteorites. Groupings of meteorites according to petrologic, mineralogical, bulkchemical, and isotopic properties suggest the existence of 100–150 distinct parent bodies. Dynamical studies imply that most meteorites have their source bodies in the main belt and not among the...

Iron meteorites: Crystallization, thermal history, parent bodies, and origin

We review the crystallization of the iron meteorite chemical groups, the thermal history of the irons as revealed by the metallographic cooling rates, the ages of the iron meteorites and their relationships with other meteorite types, and the formation of the iron meteorite parent bodies. Within most iron meteorite groups, chemical trends are broadly consistent with fractional crystallization, ...

A Post Accretionary Origin for Meteoritic and Cometary Organic Solids?

Introduction: The insoluble organic matter (IOM) contained with in all chondritic meteorites constitutes a significant reservoir of extraterrestrial organic matter that in some cases may be as high as 3.5 wt. % [1]. Whereas considerable effort has been made to develop a molecular understanding of meteoritic IOM, there remains considerable uncertainty regarding its origins, i.e., was IOM formed ...

Modeling of Cm Parent Bodies