17α(H) Hopane identified in Oil Shale of the Green River Formation (Eocene) by Carbon-13 NMR

Balogh, B.; Wilson, Donald M.; Christiansen, P. C.; Burlingame, Alma L.

doi:10.1038/242603a0

Cited by 44 publications

(6 citation statements)

References 9 publications

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“…'H NMR spectra were determined at 89. 6 MHz on the same instrument over a 900 Hz (10 ppm) window with 8K (4K real) data points. 'H and 13C NMR chemical shifts are reported relative to internal tetramethylsilane (TMS).…”

Section: Methodsmentioning

confidence: 99%

Carbon‐13 NMR study of some triterpene hydrocarbons of the hopane group

Wilkins

Bird

Jäger

1987

Magnetic Reson in Chemistry

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Section: Methodsmentioning

confidence: 99%

Carbon‐13 NMR study of some triterpene hydrocarbons of the hopane group

Wilkins

Bird

Jäger

1987

Magnetic Reson in Chemistry

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“…Note that the two C27 terpanes present in significant amounts in the pyrolyzate oil are practically absent in the bitumen, solvent-extractable oil from the Green River shale. 17-a(H)C3o hopane has been identified in Green River shale by Balogh et al 1973 (6). See Figure 8.…”

Section: Instrumentationmentioning

confidence: 98%

Terpane-sterane release from kerogen by pyrolysis gas chromatography-mass spectrometry

Gallegos¹

1975

Anal. Chem.

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Nb5+-V02+ can be effected simply by taking 0.1 M HNO3 as the developer, in only 30 minutes. This developer is also useful for separating Ba2+ from 38 metal ions. Some interesting aspects of aqueous nitric acid systems are summarized in Figures 1 and 2. Figure 1 shows the dependence of Ri on pH of the system for the alkali metals.As expected the Ri increases with pH indicating an increase in the exchange process at high pH. However, K+ shows an irregular behavior, which may probably be due to the incorporation of K+ ions in the matrix during the preparation of papers, when they were dipped in KSb(OH)6 solution. To understand the exchange process, ARf (= Rf in 4M HNO3 -Rf in 10-5 HNO3) was calculated for all the metal ions and the average ARf was obtained for monovalent and multivalent metal ions. A plot between average ARf and the charge of the metal ion (Figure 2) shows that as the charge increases, the difference in the Rf values also increases till charge = 3+. ARf suddenly falls with the further increase in charge probably because of the insoluble salt formation. Rm and log Rf values were also calculated for different metal ions. It was observed that these values are generally linearly dependent on pH of the solvent systems. Among alkali metals, K+ is an exception probably due to the reason explained earlier for Ri. There is no change in the Rm and log Rf values for W6+ and Mo6+ with the increase in pH. It is obvious because W6+ and Mo6+ are taken as anions which form insoluble stannic tungstate and molybdate, respectively.

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“…n-Alkanes, branched-and cyclic-alkanes, aromatics and polar compounds (including acids, alcohols, etc.) were identified in the Green River shale bitumen of Green River Basin, Wyoming [66,77], Grand Valley, Colorado [78 -80] and other locations [81][82][83][84], Organic compounds which have been identified from the Cenozoic shale bitumens are summarized in Table 3.…”

Section: Uinta Basin and Green River Basin: The Uintamentioning

confidence: 99%

A Review of the Organic Geochemistry of Shales and Possible Interactions Between the Organic Matter of Shales and Radionuclides

1990

Radiochimica Acta

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Shale formations have been suggested as potential host rocks for high level nuclear waste repositories. Several studies have demonstrated the interactions of nuclides with organic compounds found in shales. In order to understand the possibility of interaction between organic components of shales and trace elements, literature on the identification of organic compounds from various shales of the continental United States and evidences of interactions have been reviewed first. The Green River Formation of the Cenozoic era is the most studied shale followed by the Pierre Shale of the Mesozoic era and the Devonian Black Shale of the Paleozoic era. Organic compounds that have been identified from these shales are mainly hydrocarbons and carboxylates along with small amounts of other compounds. These organic compounds, however, constitute only a small fraction of the organic matter in shales; the majority of the organic compounds in shales are still unidentified. Interaction between organics and trace elements are found mostly due to the formation of complexes between carboxylates of shales and the elements.

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17α(H) Hopane identified in Oil Shale of the Green River Formation (Eocene) by Carbon-13 NMR

Cited by 44 publications

References 9 publications

Carbon‐13 NMR study of some triterpene hydrocarbons of the hopane group

Carbon‐13 NMR study of some triterpene hydrocarbons of the hopane group

Terpane-sterane release from kerogen by pyrolysis gas chromatography-mass spectrometry

A Review of the Organic Geochemistry of Shales and Possible Interactions Between the Organic Matter of Shales and Radionuclides

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