Characterization of organic matter in the Torridonian using Raman spectroscopy

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Abstract

The degree of structural order in the organic carbon preserved in grey–black shales of the Neoproterozoic Torridon Group was characterized using Raman spectroscopy. All the samples contained kerogen rather than graphite, which is consistent with a low level of metamorphism. Samples of shale from the Diabaig Formation from six widely separated localities exhibited a consistently greater structural order than shales from five localities in formations higher in the Torridon Group. This supports previous models invoking an unconformity between the Diabaig Formation and the rest of the Torridon Group. The data further suggested that the Diabaig Formation experienced an additional episode of heating in the late stages of Grampian deformation.
Original languageEnglish
Pages (from-to)71-80
Number of pages10
JournalGeological Society Special Publications
Volume448
Early online date15 Sep 2016
DOIs
Publication statusPublished - 2017

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Torridonian
Kerogen
Raman spectroscopy
kerogen
Shale
Organic carbon
graphite
Biological materials
unconformity
shale
Graphite
metamorphism
organic carbon
heating
Heating
organic matter

Cite this

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title = "Characterization of organic matter in the Torridonian using Raman spectroscopy",
abstract = "The degree of structural order in the organic carbon preserved in grey–black shales of the Neoproterozoic Torridon Group was characterized using Raman spectroscopy. All the samples contained kerogen rather than graphite, which is consistent with a low level of metamorphism. Samples of shale from the Diabaig Formation from six widely separated localities exhibited a consistently greater structural order than shales from five localities in formations higher in the Torridon Group. This supports previous models invoking an unconformity between the Diabaig Formation and the rest of the Torridon Group. The data further suggested that the Diabaig Formation experienced an additional episode of heating in the late stages of Grampian deformation.",
author = "Muirhead, {D. K.} and J. Parnell and S. Spinks and Bowden, {S. A.}",
note = "We gratefully acknowledge two anonymous reviewers for their constructive comments on an earlier version of this manuscript. Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier. ed. / A. T. Brasier; D. McIlroy; N. McLoughlin. 978-1-78620-279-6",
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publisher = "Geological Society of London",

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TY - JOUR

T1 - Characterization of organic matter in the Torridonian using Raman spectroscopy

AU - Muirhead, D. K.

AU - Parnell, J.

AU - Spinks, S.

AU - Bowden, S. A.

N1 - We gratefully acknowledge two anonymous reviewers for their constructive comments on an earlier version of this manuscript. Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier. ed. / A. T. Brasier; D. McIlroy; N. McLoughlin. 978-1-78620-279-6

PY - 2017

Y1 - 2017

N2 - The degree of structural order in the organic carbon preserved in grey–black shales of the Neoproterozoic Torridon Group was characterized using Raman spectroscopy. All the samples contained kerogen rather than graphite, which is consistent with a low level of metamorphism. Samples of shale from the Diabaig Formation from six widely separated localities exhibited a consistently greater structural order than shales from five localities in formations higher in the Torridon Group. This supports previous models invoking an unconformity between the Diabaig Formation and the rest of the Torridon Group. The data further suggested that the Diabaig Formation experienced an additional episode of heating in the late stages of Grampian deformation.

AB - The degree of structural order in the organic carbon preserved in grey–black shales of the Neoproterozoic Torridon Group was characterized using Raman spectroscopy. All the samples contained kerogen rather than graphite, which is consistent with a low level of metamorphism. Samples of shale from the Diabaig Formation from six widely separated localities exhibited a consistently greater structural order than shales from five localities in formations higher in the Torridon Group. This supports previous models invoking an unconformity between the Diabaig Formation and the rest of the Torridon Group. The data further suggested that the Diabaig Formation experienced an additional episode of heating in the late stages of Grampian deformation.

U2 - 10.1144/SP448.2

DO - 10.1144/SP448.2

M3 - Article

VL - 448

SP - 71

EP - 80

JO - Geological Society Special Publications

JF - Geological Society Special Publications

SN - 0305-8719

ER -