Please refer : 

jorg A Pfander , Trace elements in magmatic  system and geochemical model.(on line available).

geo.tu-Freiberg.de

Dear Hong Anh,

Jörg A Pfänder gives you a good explanation for MORB.  However, it will not give you a clue on how to calculate the contrubution of such and such a geological environment to your sample at hand.  I would just do a trend analysis of trace elements and then find out which families you can identify via that analysis.  You could then do a qualitative interpretation of the data and say which family is dominant (say pelagic,  mafic intrusive or extrusive, etc).  May  be I am totally wrong and such models that you can use for doing the calculations you want to do have become available recently.  But that would be a surprise to me.

Best,

Wolf

Dear Virendra Kumar Saxena,

Thank you for your suggestion 

Anh,

Dear Wolf Gehrish,

First, thank you for your answer. 

I have been using the trace element mixing model which was mentioned in Eisele et al., 2002

Till now, my trouble is how to adjust mathematically the proportions of these six components to the calculated mixtures most matched the averages of the incompatible element ratios measured in my samples (within ± 20% is acceptable)

j. Eisele et al., (2002) The role of sediment recycling in EM-1 inferred from Os, Pb, Hf, Nd, Sr isotope and trace element systematics of the Pitcairn hotspot. EPSL 196 197-212

Best regard,

Anh

I recommend Virendra's answer

Best Regards