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Geochemical Journal
Geochemical Journal An open access journal for geochemistry
Published for geochemistry community from Geochemical Society of Japan.

Thermal alteration of kerogen as an indicator of contact metamorphism to sedimentary rocks; 1H-NMR T1 and elemental composition

Yoshihiro Ujiié
Geochemical Journal, Vol. 18, No. 3, P. 163-166, 1984


Kerogen in sedimentary rocks metamorphosed by an igneous dyke intrusion was studied by 1H-NMR and elemental analyses. The spin-lattice relaxation time (T1) of kerogen in 1H-NMR increases toward the contact of the dyke, and atomic ratios in H/C, N/C and O/C of kerogen decrease in the dyke proximity. 1H-NMR T1 of kerogen is a useful parameter for contact metamorphism.

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