open pit method of mining bitumen

Extraction of Resources | Geology- open pit method of mining bitumen ,Open-pit mining, or open-cast mining ... underground mining methods extract the valued material. Open-pit mines that ... from open-pit mines include: Bitumen;Athabasca oil sands - WikipediaOnly 20 percent of bitumen can be extracted using open pit mining methods, ... 2005 production of crude bitumen in the Athabasca oil sands was as follows: