Thermal history modelling of the L chondrite parent body

Thermal constraints on the early history of the H-chondrite parent body reconsidered

Reconstructions of the early thermal history of the H-chondrite parent body have focused on two competing hypotheses. The first posits an undisturbed thermal evolution in which the degree of metamorphism increases with depth, yielding an “onion-shell” structure. The second posits an early fragmentation–reassembly event that interrupted this orderly cooling process. Here, we test these hypothese...

Joint Thermal and Collisional Modeling of the H-chondrite Parent Body

Grimm, W.F. Bottke, D. Durda, B. Enke, E.R.D. Scott, E. Asphaug, D. Richardson. Space Studies Department, Southwest Research Institute, 1050 Walnut St. #400, Boulder, CO 80302, [email protected]. Hawaii Institute of Geophysics and Planetology, University of Hawaii, Manoa. Earth Sciences Department, University of California, Santa Cruz. Department of Astronomy, University of Maryland, Colle...

Petrography of Mil05029, the First Accretional Impact Melt from the L- Chondrite Parent Body

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...

Very Short Delivery times of Meteorites after the L-chondrite Parent Body

Cosmic-ray exposure ages of 480 million year old fossil meteorites found in Southern Sweden constrain delivery times of meteorites from a large collision in the asteroid belt. Chromite grains from seven meteorites from four stratigraphic layers define an exposure age gradient as expected if the meteorites originated from the well-known L-chondrite parent body break-up event. The very short deli...

The Tagish Lake Chondrite and the Interstellar Parent Body