kerogenn.
/ˈkɛrədʒən/ Geology.
Originally: the carbonaceous material in oil shale that gives rise to crude oil on distillation. In later use extended to denote any organic material in sedimentary rock which, like the oil-yielding kind, is insoluble in the usual organic solvents.
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the world > the earth > minerals > types of mineral > hydrocarbon minerals > [noun] > other hydrocarbon minerals
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kerogen1906
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the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > other hydrocarbons
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the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > kerogen
kerogen1906
1906 D. R. Steuart in H. M. Cadell et al. Oil-Shales of Lothians iii. 142 We are indebted to Professor Crum Brown, F.R.S., for suggesting the term Kerogen to express the carbonaceous matter in shale that gives rise to crude oil in distillation.
1913 H. M. Cadell Story of Forth 199 Wherever the oil has thus been robbed of its Kerogen, it is, of course, rendered worthless.
1923 P. E. Spielmann Genesis of Petroleum ii. 17 In some cases it may have been that kerogen consisting of unicellular algae and of spores like those of the lycopods, had actually been distilled.
1923 Nature 17 Mar. 374/1 The marine kerogen shales from the oil-fields of Japan.
1941 Jrnl. Inst. Petroleum 27 426 The term ‘kerogen’..is merely a convenient name for the organic matter from which oil is obtained when rocks containing it are heated; hence the kerogens of different deposits may be chemically different.
1941 Jrnl. Inst. Petroleum 27 427 The insolubility of kerogen in organic solvents is a characteristic property which serves to distinguish true kerogen rocks from such materials as oil- or tar-sands, bituminous limestones, etc.
1958 Habitat of Oil (Amer. Assoc. Petroleum Geol.) 758 Kerogens isolated from the marine rocks were obtained as very fine, amorphous, soft powders that varied from dark brown to jet black... When the samples were heated in an open test tube only small amounts of an oily distillate were formed.
1961 Fuel XL. 387 Colorado oil-shale kerogen is predominantly a cyclic material, highly saturated with hydrogen, and contains oxygen, nitrogen and sulphur atoms associated with ring structures.
1963 J. P. Forsman in I. A. Breger Org. Geochem. v. 148 The term ‘kerogen’..may be defined as the insoluble organic matter occurring in sedimentary rocks.
1963 J. P. Forsman in I. A. Breger Org. Geochem. v. 148 Since the dividing line between oil shales and other rocks is rather arbitrary, there appears to be no logical reason for restricting the name ‘kerogen’ to a certain rock type.
1968 Times 16 Nov. 9/6 The most ancient kerogen yet known comes from the Fig Tree System of rocks in Swaziland, thought to be 3,100 million years old.
This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2019).
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n.1906