Oct 19 (Reuters) - South32 Ltd S32.AX
* qtrly metallurgical coal production 494 kt versus 1,437 kt in prior quarter
* qtrly manganese ore production 1,304 kwmt versus 1,314 kwmt in prior quarter
* Maintained annual production guidance for operations
* Confirmed will operate one Longwall at the illawarra metallurgical coal Appin mine across the remainder of fy18
* Qtrly aluminium production 249 kt versus 248 kt in prior quarter
* "fy18 production guidance for Illawarra metallurgical coal will be provided in due course"
* Longwall 707 is expected to be completed in june 2018 quarter