EARTH SCIENCE
GEOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Show high atomic C (>1.5), low O/C (<0.1).
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Show low atomic H/C (<1.0) d high O/C (<0.3)
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Contains sufficient hydrogen to be gas generative but not enough hydrogen to be oil prone .
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A maceral formed from land plant wood.
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Detailed explanation-1: -Kerogen type III contains sufficient hydrogen to be gas generative but not enough hydrogen to be oil prone. In its pure form, it is composed of vitrinite, a maceral formed from land plant wood.
Detailed explanation-2: -Kerogen is insoluble in water and in organic solvents such as benzene or alcohol. Upon heating under pressure, however, the large paraffin molecules break down into recoverable gaseous and liquid substances resembling petroleum. This property makes oil shale a potentially important source of synthetic crude oil.
Detailed explanation-3: -Type II is a type of kerogen that is composed of a mix of terrestrial and marine organic materials and can sometimes produce oil. Type III kerogen is composed mainly of wood-like material along with some algae and plankton, generally creating natural gas.
Detailed explanation-4: -Type I: Algal/Sapropelic. Type I kerogens are characterized by high initial hydrogen-to-carbon (H/C) ratios and low initial oxygen-to-carbon (O/C) ratios. Type II: Planktonic. Type II-S: Sulfurous. Type III: Humic. Type IV: Inert/Residual.