The role of post-shock heating by plastic deformation during impact devolatilization of calcite

1 The role of post-shock heating by plastic deformation during impact devolatilization of calcite Kosuke Kurosawa 1,* , Hidenori Genda 2 , Shintaro Azuma 3 , and Keishi Okazaki 4 1 Planetary Exploration Research Center, Chiba Institute of Technology, 2-17-1, Narashino, Tsudanuma, Chiba 275-0016, Japan. 2 Earth–Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan. 3 Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan. 4 Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 200 Monobe Otsu, Nankoku, Kochi 783-8502, Japan. *Corresponding author Kosuke Kurosawa PhD Planetary Exploration Research Center, Chiba Institute of Technology E-mail: [email protected] Tel: +81-47-4782-0320 Fax: +81-47-4782-0372 Accepted for publication in Geophysical Research Letters. Abstract An accurate understanding of the relationship between the impact conditions and the degree of shock-induced thermal metamorphism in meteorites allows the impact environment in the early Solar System to be understood. A recent hydrocode has revealed that impact heating is much higher than previously thought. This is because plastic deformation of the shocked rocks causes further heating during decompression, which is termed post-shock heating. Here we compare impact simulations with laboratory

The role of post-shock heating by plastic deformation during impact devolatilization of calcite

Documents

plastic deformation

geology

rocks

thermal metamorphism

postshock heating

strengths