According to the legal docs, obtained by TMZ, Tareq is citing adultery and abandonment as the reason for the divorce.

Tareq says in the papers, "the paramour [Neal] sent to my email account ... a email with an attachment of a [a male sex part]" -- presumably his.

Tareq blasts his wife, claiming, "She continually exposes our friends and acquaintances to her adulterous relationship and has flaunted the same throughout the community, the nation and indeed the world, and thus caused me to suffer great harm, humiliation and embarrassment."

Tareq says his wife has been banging Schon "for a period of months."

And he also blames the band, claiming Journey has been paying for her travel accommodations and other expenses.