Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
Rock Physics of Shale - Stanford University
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Vitrinite is a type <strong>of</strong> maceral with a shiny appearance resembling glass (vitreous). It is formed<br />
diagenetically by the thermal alteration <strong>of</strong> lignin and cellulose in plant cell walls. Chemically,<br />
it is composed <strong>of</strong> polymers, cellulose and lignin. It is therefore common in sedimentary rocks<br />
with a terriginous origin, containing plant matter.<br />
Vitrinite Reflectance, R o : percentage <strong>of</strong> light reflected from polished vitrinite samples,<br />
usually at wavelengths <strong>of</strong> 546 nm. R o is sensitive to temperature ranges that are responsible<br />
for hydrocarbon maturation; R o increases with thermal maturity <strong>of</strong> a source rock.<br />
20<br />
Gary Mavko – <strong>Stanford</strong> <strong>Rock</strong> <strong>Physics</strong> Laboratory
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