Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry

Details Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003natur.422..502t&link_type=abstract

Nature, Volume 422, Issue 6931, pp. 502-506 (2003).

Computer Science

72

Scientific paper

Our Solar System formed ~4.6 billion years ago from the collapse of a dense core inside an interstellar molecular cloud. The subsequent formation of solid bodies took place rapidly. The period of <10 million years over which planetesimals were assembled can be investigated through the study of meteorites. Although some planetesimals differentiated and formed metallic cores like the larger terrestrial planets, the parent bodies of undifferentiated chondritic meteorites experienced comparatively mild thermal metamorphism that was insufficient to separate metal from silicate. There is debate about the nature of the heat source as well as the structure and cooling history of the parent bodies. Here we report a study of 244Pu fission-track and 40Ar-39Ar thermochronologies of unshocked H chondrites, which are presumed to have a common, single, parent body. We show that, after fast accretion, an internal heating source (most probably 26Al decay) resulted in a layered parent body that cooled relatively undisturbed: rocks in the outer shells reached lower maximum metamorphic temperatures and cooled faster than the more recrystallized and chemically equilibrated rocks from the centre, which needed ~160Myr to reach 390K.

Affiliated with

Also associated with

No associations

Rating

Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure and thermal history of the H-chondrite parent asteroid revealed by thermochronometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1544158