Hi Anoop K S

According to Hickey-Vargas (2018) "As an example of its geochemical impact, approximately 4% of seawater (Quinby-Hunt and Turekian, 1983) dissolved in a MORB basaltic magma (N-MORB, Edmond et al., 1979, Sun and McDonough, 1989) produces a slight decrease in the abundance of elements such as Rb, Ba, U, K and Na, in addition to all other elements shown in Fig. 8, whereas Cl (not analyzed in this work) increases by a factor of 20."

You can find the paper at the following link:

Article Origin of depleted basalts during subduction initiation and ...

Best Regards,

SHA

Thanks a lot for your answer and for the suggested reference.

Hello Dear Anoop K S

Maybe these basaltic lavas were derived from a heterogeneous mantle source. Pls, read the discussion section of the following published paper.

https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_5/b_fdi_18-19/24855.pdf

Also, you can try to find similar cases or other explanations for this depletion.

With best regards,

Mohamed Faisal