Microstructure of graptolite periderm in Silurian gas shales of Northern Poland

Rafał Morga; Mirosława Pawlyta

doi:10.1016/j.coal.2018.02.012

Microstructure of graptolite periderm in Silurian gas shales of Northern Poland

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Abstrakt

Core samples of Silurian graptolite shales from an exploration borehole within the Baltic Basin were examined by optical microscopy, Raman spectroscopy and high resolution transmission electron microscopy. Graptolite periderm is composed of poorly ordered carbonaceous material of mainly aromatic structures. The dimension of the coherent domains is 1–2 nm. They are composed of two to three stacked layers. Raman spectral parameters of graptolite periderm are correlated with the mean random (R_r) and mean maximum (R_max) reflectance of graptolites. The spectral I_D1/I_G ratio predicts thermal maturity in a mean reflectance of graptolites (R_r) range between 1.30% and 1.80% (R_max ≈ 1.40–2.00%; Vitrinite Reflectance Equivalent VRE ≈ 1.10–1.50%). It is possible to calculate VRE_Raman from the I_D1/I_G ratio.

Język oryginału	angielski
Strony (od–do)	1-7
Liczba stron	7
Czasopismo	International Journal of Coal Geology
Tom	189
Identyfikatory DOI	https://doi.org/10.1016/j.coal.2018.02.012
Status publikacji	Opublikowano - 15 mar 2018

Obszary tematyczne ASJC Scopus

Technologia paliwowa
Geologia
Geologia ekonomiczna
Stratygrafia

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10.1016/j.coal.2018.02.012

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title = "Microstructure of graptolite periderm in Silurian gas shales of Northern Poland",

abstract = "Core samples of Silurian graptolite shales from an exploration borehole within the Baltic Basin were examined by optical microscopy, Raman spectroscopy and high resolution transmission electron microscopy. Graptolite periderm is composed of poorly ordered carbonaceous material of mainly aromatic structures. The dimension of the coherent domains is 1–2 nm. They are composed of two to three stacked layers. Raman spectral parameters of graptolite periderm are correlated with the mean random (Rr) and mean maximum (Rmax) reflectance of graptolites. The spectral ID1/IG ratio predicts thermal maturity in a mean reflectance of graptolites (Rr) range between 1.30\% and 1.80\% (Rmax ≈ 1.40–2.00\%; Vitrinite Reflectance Equivalent VRE ≈ 1.10–1.50\%). It is possible to calculate VRERaman from the ID1/IG ratio.",

keywords = "Gas shales, Graptolites, HRTEM, Microstructure, Raman spectroscopy",

author = "Rafa{\l} Morga and Miros{\l}awa Pawlyta",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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day = "15",

doi = "10.1016/j.coal.2018.02.012",

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TY - JOUR

T1 - Microstructure of graptolite periderm in Silurian gas shales of Northern Poland

AU - Morga, Rafał

AU - Pawlyta, Mirosława

PY - 2018/3/15

Y1 - 2018/3/15

N2 - Core samples of Silurian graptolite shales from an exploration borehole within the Baltic Basin were examined by optical microscopy, Raman spectroscopy and high resolution transmission electron microscopy. Graptolite periderm is composed of poorly ordered carbonaceous material of mainly aromatic structures. The dimension of the coherent domains is 1–2 nm. They are composed of two to three stacked layers. Raman spectral parameters of graptolite periderm are correlated with the mean random (Rr) and mean maximum (Rmax) reflectance of graptolites. The spectral ID1/IG ratio predicts thermal maturity in a mean reflectance of graptolites (Rr) range between 1.30% and 1.80% (Rmax ≈ 1.40–2.00%; Vitrinite Reflectance Equivalent VRE ≈ 1.10–1.50%). It is possible to calculate VRERaman from the ID1/IG ratio.

AB - Core samples of Silurian graptolite shales from an exploration borehole within the Baltic Basin were examined by optical microscopy, Raman spectroscopy and high resolution transmission electron microscopy. Graptolite periderm is composed of poorly ordered carbonaceous material of mainly aromatic structures. The dimension of the coherent domains is 1–2 nm. They are composed of two to three stacked layers. Raman spectral parameters of graptolite periderm are correlated with the mean random (Rr) and mean maximum (Rmax) reflectance of graptolites. The spectral ID1/IG ratio predicts thermal maturity in a mean reflectance of graptolites (Rr) range between 1.30% and 1.80% (Rmax ≈ 1.40–2.00%; Vitrinite Reflectance Equivalent VRE ≈ 1.10–1.50%). It is possible to calculate VRERaman from the ID1/IG ratio.

KW - Gas shales

KW - Graptolites

KW - HRTEM

KW - Microstructure

KW - Raman spectroscopy

UR - https://www.scopus.com/pages/publications/85044307219

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DO - 10.1016/j.coal.2018.02.012

M3 - Article

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SN - 0166-5162

VL - 189

SP - 1

EP - 7

JO - International Journal of Coal Geology

JF - International Journal of Coal Geology

ER -

Microstructure of graptolite periderm in Silurian gas shales of Northern Poland

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Obszary tematyczne ASJC Scopus

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