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Report on Canadian graptolites

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Graptolite reflectance anomaly

International Journal of Coal Geology, 2022
Thermal maturation is traditionally evaluated based on vitrinite reflectance (VRo) measurements and its relationship to oil and gas generation and diagenetic transformation are ingrained in many basin modeling tools. However, vitrinite derives from higher land plants that evolved in Devonian.
Zheng, Xiaowei, Schovsbo, Niels H., Luo, Qingyong, Wu, Jia, Zhong, Ningning, Goodarzi, Fariborz, Sanei, Hamed   +6 more
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Ordovician graptolite biostratigraphy of the Röstånga-2 drill core (Scania, southern Sweden)

GFF, 2020
The graptolite biostratigraphy of the 116.11-m-long Röstånga-2 drill core from Scania, southern Sweden, includes the Darriwilian (Middle Ordovician) Holmograptus lentus, Nicholsonograptus fasciculatus, Pterograptus elegans, Pseudamplexograptus distichus ...
J. Maletz, P. Ahlberg, Frans Lundberg
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Graptolite biostratigraphy of the Ordovician Almelund and Sularp Shale formations of the Fågelsång-3 drill core, Scania, Sweden

GFF, 2020
The upper Middle to basal Upper Ordovician succession (Darriwilian to Sandbian) of the Fågelsång-3 drill core provides new important information on the graptolite biostratigraphy of Scania, southern Sweden.
J. Maletz, P. Ahlberg
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Optical characteristics of graptolite-bearing sediments and its implication for thermal maturity assessment

International Journal of Coal Geology, 2018
Graptolite reflectance was thought to be one of the most useful thermal maturity indicators for graptolite-bearing sediments, however, the relationship between graptolite reflectance and vitrinite reflectance is not well-established.
Q. Luo, Jingyue Hao, C. Skovsted, Yao-hui Xu, Yan Liu, J. Wu, Shuning Zhang, Wanli Wang   +7 more
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The mid-Homerian (Silurian) biotic crisis in offshore settings of the Prague Synform, Czech Republic: Integration of the graptolite fossil record with conodonts, shelly fauna and carbon isotope data

Palaeogeography, Palaeoclimatology, Palaeoecology, 2019
The middle Homerian biotic crisis resulted in the almost complete eradication of graptolites. The shale-dominated Kosov Quarry section, central Bohemia, preserves the most complete graptolite record across the crisis in peri-Gondwanan Europe.
Š. Manda, P. Štorch, J. Frýda, L. Slavík, Z. Tasáryová   +4 more
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Raman spectroscopy of graptolite periderm and its potential as an organic maturity indicator for the Lower Paleozoic in southwestern China

International Journal of Coal Geology, 2019
The determination of organic maturity for Lower Paleozoic sediments is challenging due to the lack of vitrinite. Many studies have been completed on the morphology and optical properties of graptolite periderm, but little is known about vibrational ...
Hao Jingyue, N. Zhong, Q. Luo, Dehan Liu, J. Wu, L. Anji   +5 more
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Organic petrographic analysis of artificially matured chitinozoan- and graptolite-rich Upper Ordovician shale from Hudson Bay Basin, Canada

International Journal of Coal Geology, 2018
Chitinozoan, graptolite and organic-rich immature Upper Ordovician mudstone was artificially matured using closed hydrous pyrolysis. The pyrolysis was performed at isothermal temperatures of 310-350 °C at 10 °C increments for 72 h. This temperature range
J. Reyes, Chunqing Jiang, D. Lavoie, D. Armstrong, M. Milović, R. Robinson   +5 more
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Katian (Ordovician) to Aeronian (Silurian, Llandovery) graptolite biostratigraphy of the YD‐1 drill core, Yuanan County, Hubei Province, China

Papers in Palaeontology, 2019
The graptolite succession of the YD‐1 drill core provides a new view into the lower Silurian (Llandovery) biostratigraphy of the Yichang region on the Yangtze platform of China. A thick succession of black to greenish, fine to silty shales and siltstones
J. Maletz, Chuanshang Wang, Xiaofeng Wang   +2 more
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Graptolite‐Derived Organic Matter and Pore Characteristics in the Wufeng‐Longmaxi Black Shale of the Sichuan Basin and its Periphery

Acta Geologica Sinica - English Edition, 2019
A key target of shale gas exploration and production in China is the organic‐rich black shale of the Wufeng Formation‐Longmaxi Formation in the Sichuan Basin and its periphery.
J. Wu, Wen Zhou, Shasha Sun, Shangwen Zhou, Zhensheng Shi   +4 more
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