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Line 63: + + + − The figure below shows gas chromatograms of two oils from Texas and Oklahoma. Full-scale chromatograms on the left show the oils are not degraded, a condition necessary for this type of correlation. The shaded areas indicate the regions expanded on the right. Based on the many similarities in the expanded-scale chromatograms and on other geo-chemical similarities, it was concluded that these two oils were derived from the same Lower Paleozoic source facies.+ − − [[file:oiloil-and-oilsource-rock-correlations_fig8-12.png|thumb|{{figure number|8-12}}From Curiale;<ref name=ch08r10>Curiale, J., A., 1992, Petroleum geochemistry of Texas and Oklahoma oils from the Marathon/Ouachita foldbelt: Chemical Geology, vol. 98, p. 151–173., 10., 1016/0009-2541(92)90096-N</ref> reprinted with permission from Elsevier.]]
Gas chromatography: data obtained (view source)
Revision as of 14:39, 4 February 2014
, 14:39, 4 February 2014→Other minor components
==Other minor components==
==Other minor components==
[[file:oiloil-and-oilsource-rock-correlations_fig8-12.png|thumb|{{figure number|8}}From Curiale;<ref name=ch08r10>Curiale, J., A., 1992, Petroleum geochemistry of Texas and Oklahoma oils from the Marathon/Ouachita foldbelt: Chemical Geology, vol. 98, p. 151–173., 10., 1016/0009-2541(92)90096-N</ref> reprinted with permission from Elsevier.]]
Other minor components present in gas chromatograms can be used for correlations, even when compound identities are not known. However, one should always treat unidentified compounds with caution, since they may represent contaminants, or their concentrations may be affected by maturity or alteration effects.
Other minor components present in gas chromatograms can be used for correlations, even when compound identities are not known. However, one should always treat unidentified compounds with caution, since they may represent contaminants, or their concentrations may be affected by maturity or alteration effects.
[[:file:oiloil-and-oilsource-rock-correlations_fig8-12.png|Figure 8]] shows gas chromatograms of two oils from Texas and Oklahoma. Full-scale chromatograms on the left show the oils are not degraded, a condition necessary for this type of correlation. The shaded areas indicate the regions expanded on the right. Based on the many similarities in the expanded-scale chromatograms and on other geo-chemical similarities, it was concluded that these two oils were derived from the same Lower Paleozoic source facies.
==Star diagrams==
==Star diagrams==