Board Thread:Theories and Speculation/@comment-28832247-20160624022502/@comment-734582-20160719103650

GreatestSin wrote: or the additional lightning of sasuke caused a imbalance in the earth-lightning mix which screwed up the entire KKG :) He specifically says it defuses his bombs, and Sasuke mentions he uses Earth Style seals for his clay. Furthermore, Deidara needs to gather clay, he can't create it. Deidara however is explicitly said to be an Explosion Release user in the 4th war.

This suggests that 1: Explosion Release can't possibly contain Earth Release (else Deidara doesn't need to gather clay)

and 2: It suggests Deidara's secret jutsu (which combines Explosion Release with clay), not the explosion release itself, is defused by Lightning.