subchondritic
adjEtymology From sub- + chondritic.
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Astronomy, Natural sciences, Planetology Of an elemental ratio Less than that found in a typical chondrite.
- According to the model, a magma ocean that differentiated chiefly at low pressure and contained 6-8 wt% A1203 and a subchondritic Ca/Al ratio probably formed the lunar crust.1979, International Aerospace Abstracts, page 3096:
- The subcontinental lithospheric mantle as a mantle reservoir may be modeled by the time-integrated growth of radiogenic ¹⁸⁷Os along retarded (subchondritic) Re/Os trajectories, which results in subchondritic Os isotope compositions.1999, David Dillon Lambert, Application of radiogenic isotopes to ore deposit research and exploration, page 35:
1 more example
- If all the Ag were delivered prior to the main phase, the core segregation by about 30 Ma when the Earth was 90% accreted, then a subchondritic ¹⁰⁷Ag/¹⁰⁹Ag would be expected because of strong depletion of siderophile element Pd in the silicate Earth.2016, Hidenori Terasaki, Deep Earth: Physics and Chemistry of the Lower Mantle and Core:
- Related terms
- superchondritic