Kerogen amorphous

Lewan M. D. (1986) Stable carbon isotopes of amorphous kerogens from Phanerozoic sedimentary rocks. Geochim. Cosmochim. Acta 50, 1977-1987. 

Molecular Composition of Brazilian oil shales. Oil shales may be considered as composed of two main (chemical) phases an inorganic phase, constituted of mineral species (crystaline and/or amorphous) and an organic phase that, in its turn, can be divided into two oth er (sub) phases the bitumen, the soluble (in organic solvents) frac tion and the kerogen defined as the insoluble organic matter of organic. 

The relative proportions of amorphous, exinous and vitrinous plus fusinous kerogen material in the few samples examined to date are shown in Figure 7. Whitby Formation kerogens from the Collingwood area are highest in amorphous material and so one... 

Figure 7. The relative proportions of amorphous (am), exinous (ex), and vitrinous plus fusinous (vit. + fus.) kerogen macerals. Key to formations , Kettle Point a, Marcellus , Manitoulin, Whitby A, Collingwood, Whitby and o, Toronto, Whitby.

Price L.C., Barker C.E. (1985) Suppression of vitrinite reflectance in amorphous rich kerogen—a major unrecognised problem.J. Pet. Geol. 8, 59—84. 

M., Lugardon, B., Raynaud, J.F. and Connan, J., 1990. Occurrence and origin of ultralaminar structures in amorphous kerogens of various source rocks and oil shales. Org. Geochem., 16 889-895. 

---