Fold top pair?

[kingstalker]

Pokerstars 35+3 double shootout
blinds 10/20
First hand
I have 1500 in chips
I am dealt [img]/images/graemlins/spade.gif[/img]A [img]/images/graemlins/diamond.gif[/img]J on the button
Folded to me, I raise to 60, BB calls
Flop is
[img]/images/graemlins/heart.gif[/img]J [img]/images/graemlins/heart.gif[/img]6 [img]/images/graemlins/club.gif[/img]4
BB checks, I bet the pot (145) he calls
Turn [img]/images/graemlins/spade.gif[/img]3
BB checks,I raise to 200, and he now mini check raises me to 400
I was a bit puzzled as to what to do here, surely he coulnt of called me with 5-7 or 5-2 before the flop, also I didnt think he could have J-6 or some other junk hand although its possible,although it is possible he flopped a small set or hit it on the turn, or was just perhaps putting me on A-K and thinking a K-J or Q-J type hand was the best hand.
River [img]/images/graemlins/spade.gif[/img]9
He bets 940 and is all in, I think about it for awhile and then fold.Should I pushed in on the turn? Or checked the turn to induce a bluff on the river?