Metamorphic Rock-Hosted Orogenic Gold Deposit Type as a Source of Langkowala Placer Gold, Bombana, Southeast Sulawesi - Idrus, Arifudin; Department of Geological Engineering, Gadjah Mada University, Jln. Grafika No. 2 Bulaksumur Yogyakarta - 55281 (Geological Agency, 2014)