Oil shale and similar materials are sedimentary rocks containing kerogen, a complex mixture of high-molecular weight organic compounds, which yield pyrolyzed ).
32.
The generation of petroleum from the Lower Cruse formation is said to be of type II kerogen that is characterized by high oil to gas ratios.
33.
Coals are from type III kerogen mostly derived from terrestrial plants, which should have a primary D / H signal sensitive to local meteoric water.
34.
While still under debate, it appears likely that incorporation of water hydrogen isotopes is the more dominant process for kerogen D-enrichment during catagenesis.
35.
The kerogen, or bitumen, that is found in association with the gold deposits almost certainly represents what remains of these Archean photosynthesizing micro-organisms.
36.
The kerogen content of oil shale formations differs widely, and the economic feasibility of its extraction is highly dependent on international and local costs of oil.
37.
As the organic rich clay is buried under millions of years of sediment accumulation, the clay turns into shale and the organic material transforms into kerogen.
38.
Although Tmax is not very reliable for high maturity kerogens due to poor pyrolysis peak yields and peak shape, the extent of kerogen transformation can be utilized.
39.
Technically speaking, oil shales are not always shales and do not contain oil, but are fined-grain sedimentary rocks containing an insoluble organic solid called kerogen.
40.
There are varying classifications of oil shales depending on their mineral content, type of kerogen, age, depositional history, and organisms from which they are derived.
