Quarterly of the Colorado School of Mines v. 18 no. 1: Supplement A: A chemical examination of the organic matter in oil shales
Samples of oil shale from DeBeque (Colo.) were examined by a microscope at a magnification of 50 diameters. Thin sections showed clear quartz grains, dense black grains of pyrite coalesced to form irregular masses, mixed clay substances, sericitic products, and carbonates. Oil shales were treated with sulfur dioxide, selenium oxychloride, sulfuryl chloride, and chlorine gas. Oven-dried oil shale from DeBeque (Colo.) of 40- to 60-mesh per inch size was extracted with various solvents in a Sohxlet-type apparatus. Only part of the kerogen of the shale could be extracted by solvents, and the material ...
(For more, see "View full record.")