Partitioning of potassium between iron and silicate at the core-mantle boundary

Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

7

Mineral Physics: High-Pressure Behavior, Tectonophysics: Earth'S Interior: Composition And State (1212, 7207, 7208, 8105), Tectonophysics: Heat Generation And Transport

Scientific paper

Chemical reactions and the partitioning of potassium between metallic iron and potassium-silicate were studied at the core-mantle boundary (CMB) condition, 2900 km deep in the Earth, in a laser-heated diamond-anvil cell (LHDAC). Analytical transmission electron microscope (ATEM) analysis of the recovered samples from 134 GPa and 3500 K, prepared with Focused Ion Beam (FIB) techniques, revealed significant dissolution of potassium (0.8 wt.%) into molten iron, indicating that the partition coefficient of potassium between iron and silicate is 0.15. Our results show that the Earth's core can contain 35 ppm total potassium, i.e., 4.1 × 10-3 ppm of 40K, which could serve as a heat source corresponding to 0.23 TW in the Earth's core.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Partitioning of potassium between iron and silicate at the core-mantle boundary 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 Partitioning of potassium between iron and silicate at the core-mantle boundary, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partitioning of potassium between iron and silicate at the core-mantle boundary will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1499183

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.