MarkWest Energy Partners L.P. (NYSE: MWE) has closed the acquisition of 49% interest in MarkWest Liberty Midstream & Resources LLC, held by The Energy & Minerals Group. The acquisition included approximately $1 billion of cash and the issuance of 19.95 million unregistered MWE Class B Units to EMG. 

MarkWest and EMG are also entering into a new Utica Shale midstream joint venture to develop natural gas processing and NGL fractionation, transportation, and marketing infrastructure in eastern Ohio beginning in 2012. Under the terms of the Utica joint venture, EMG will ...