Following an unexpected hold and extended vectoring; a commuter jet encountered windshear on final approach and executed a windshear escape maneuver before returning to land. The combination of delays resulted in a low fuel condition and the flight crew declared minimum fuel; believing it would provide priority handling.

Narrative

Before leaving the gate; I added 500 LBS of extra fuel due to strong winds in DTW; this brought us to within several hundred pounds of our maximum allowable takeoff weight. On the POLAR arrival into DTW we were assigned a hold at POLAR Intersection. We contacted Dispatch and planned to divert into FNT or LAN if we had to hold to the EFC time. We only completed 2 turns in the holding pattern then were cleared to DTW via radar vectors. We departed the hold with about 3;300 LBS of fuel.After extended vectoring we were cleared for a visual approach for Runway 27R. The surface winds in DTW were 280/27 with gusts to 39. At about 1;000 FT AGL we received a windshear warning and executed the windshear escape maneuver. Abeam the airport on downwind we had 2;400 LBS of fuel remaining. We declared minimum fuel because we projected landing fuel around 1;800 LBS after our next approach. The second visual approach resulted in a normal landing and we did not get any windshear alerts or warnings. We landed with 1;800 LBS of fuel.We departed with sufficient fuel for multiple approaches. Holding and extended downwind vectors used most of our contingency fuel. In the future; I will consider an increased fuel load even if it requires a reduction in payload.