Characterization of organic matter in the Torridonian using Raman spectroscopy

D. K. Muirhead; J. Parnell; S. Spinks; S. A. Bowden

doi:10.1144/SP448.2

Characterization of organic matter in the Torridonian using Raman spectroscopy

D. K. Muirhead, J. Parnell, S. Spinks, S. A. Bowden

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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 language	English
Pages (from-to)	71-80
Number of pages	10
Journal	Geological Society Special Publications
Volume	448
Early online date	15 Sept 2016
DOIs	https://doi.org/10.1144/SP448.2
Publication status	Published - 2017

Bibliographical 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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Accepted Author Manuscript
Final published version available in: Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier, vol. 448. http://sp.lyellcollection.org/content/early/2016/09/14/SP448.2 © Geological Society of London (2016). http://www.geolsoc.org.uk/Publications/Lyell-Collection/Using-the-Lyell-Collection/Copyright-Permissions-and-Terms-of-Use/Copyright-Policy-and-Terms-of-Use-for-Authors
Accepted author manuscript, 209 KB
Accepted Manuscript
Final published version available in: Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier, vol. 448. http://sp.lyellcollection.org/content/early/2016/09/14/SP448.2 © Geological Society of London (2016). http://www.geolsoc.org.uk/Publications/Lyell-Collection/Using-the-Lyell-Collection/Copyright-Permissions-and-Terms-of-Use/Copyright-Policy-and-Terms-of-Use-for-Authors
Accepted author manuscript, 41.9 KBLicence: Unspecified
MuirheadTorridonFigure1
Final published version available in: Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier, vol. 448. http://sp.lyellcollection.org/content/early/2016/09/14/SP448.2 © Geological Society of London (2016). http://www.geolsoc.org.uk/Publications/Lyell-Collection/Using-the-Lyell-Collection/Copyright-Permissions-and-Terms-of-Use/Copyright-Policy-and-Terms-of-Use-for-Authors
Accepted author manuscript, 875 KBLicence: Unspecified
MuirheadTorridonFigure2
Final published version available in: Earth System Evolution and Early Life: a Celebration of the Work of Martin Brasier, vol. 448. http://sp.lyellcollection.org/content/early/2016/09/14/SP448.2 © Geological Society of London (2016). http://www.geolsoc.org.uk/Publications/Lyell-Collection/Using-the-Lyell-Collection/Copyright-Permissions-and-Terms-of-Use/Copyright-Policy-and-Terms-of-Use-for-Authors
Accepted author manuscript, 20.8 KBLicence: Unspecified
MuirheadTorridonFigure3Accepted author manuscript, 16.8 KBLicence: Unspecified
MuirheadTorridonFigure4Accepted author manuscript, 37.4 KBLicence: Unspecified
MuirheadTorridonFigure5Accepted author manuscript, 140 KBLicence: Unspecified
MuirheadTorridonFigure6Accepted author manuscript, 36.5 KBLicence: Unspecified
MuirheadTorridonTable1Accepted author manuscript, 31.5 KBLicence: Unspecified

David Muirhead
- School of Geosciences, Geology and Geophysics - Personal Chair
Person: Academic

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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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

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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.

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DO - 10.1144/SP448.2

M3 - Article

SN - 0305-8719

VL - 448

SP - 71

EP - 80

JO - Geological Society Special Publications

JF - Geological Society Special Publications

ER -

Characterization of organic matter in the Torridonian using Raman spectroscopy

Abstract

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David Muirhead

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