There are a handful of articles suggesting that a new preposition has appeared in the form of "because-noun":
Isn't "Because (of)... whatever" a causitive? Causitives are adverbs; in fact they are at very core of "adverbiality." That happened and now this is the result. The only way pre- and post-conditions arise is through a change (read: action) in condition or state. (Temporal consituents are more associated with adverbs, as well.) Prepositional phrases can ornament verbs, but not be inherent to them.
"I am an astronaut because science." = "Science is what made me an astronaut." There is no prepositional context here.
So I submit that there is actually no new "because-noun" grammatical form in American English, only a mildly-interesting economical shortening, like "Nope, he dead."