Dec 9 (Reuters) - Monadelphous Group Ltd MND.AX :
* Mgjv secures karratha gas plant services contract MND.AX
* Mgjv will provide a range of services to the karratha gas plant life extension program
* Says plant has the capacity to produce 12,000 tonnes of domestic gas per day
* Source text for Eikon ID:nASXb2cpj1