Formation of the lunar crust - An electrical source of heating

摘要: Abstract Electrical heating of the outer layers Moon just after formation is shown to lead melting in a time order 10 5 –10 7 yr. The mechanism based upon eddy current induction from disordered magnetic fields swept outwards by an intense (T Tauri-like) plasma flow Sun. Threshold temperature for development electrical lies between 300–400°C depending bulk conductivity function used. alternate short period accretion as source heat evolution lunar maria and highlands, provided that long-lived radioactives are not surface too large melt volume during initial thermal episode. Thus highlands does intrinsically require rapid accretion, nor on this basis planets generally restricted very time. threshold attained either solar nebula at or low-energy long-period accumulation Moon. Variations among laws mass flux unimportant attaining heating. Eddy currents correspond transverse electric mode; they complementary mode discussed earlier asteroidal parent body melting. Joint excitation these two modes would modify intensify