Article
Geosciences, Multidisciplinary
L. Ponsaing, A. Mathiesen, H. I. Petersen, J. A. Bojesen-Koefoed, N. H. Schovsbo, H. P. Nytoft, L. Stemmerik
MARINE AND PETROLEUM GEOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Karen Dybkjaer, Erik Skovbjerg Rasmussen, Tor Eidvin, Kari Grosfjeld, Fridtjof Riis, Stefan Piasecki, Kasia K. Sliwinska
Summary: The study presents an updated stratigraphic subdivision of the Oligocene to Pleistocene succession in the Norwegian Sea area, based on the newly proposed type well for the Molo Formation and additional data from Danish North Sea wells. The stratigraphy is composed of five sedimentary units separated by hiati, with dating based on correlation to the more complete Neogene succession in the Danish central North Sea area. The study establishes a robust stratigraphic framework of these units, based on a combination of dinocyst stratigraphy and seismic data.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Henrik I. Petersen, Michael Hertle
Summary: This study evaluates the source rock potential of the Danish Central Graben by assessing the original source rock properties of the Farsund and Lola Formations. It finds that the quality of source rocks varies spatially and temporally, with the highest quality found in FSU6. The presence of oil-prone intervals in older parts of the shale succession is also important for assessing the generation potential of the Upper Jurassic petroleum system.
JOURNAL OF PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jon R. Ineson, Jussi Hovikoski, Emma Sheldon, Stefan Piasecki, Peter Alsen, Michael B. W. Fyhn, Morten Bjerager, Karen Dybkjaer, Pierpaolo Guarnieri, Bodil W. Lauridsen, Henrik Nohr-Hansen, Gunver K. Pedersen, Kristian Svennevig, Jens Therkelsen, Rikke Weibel, Jorgen A. Bojesen-Koefoed
Summary: The evaluation of the regional geotectonic impact of the High Arctic Large Igneous Province (HALIP) in the northern Atlantic region is hindered by poor correlation between the Svalbard-Barents Shelf region and eastern North Greenland. New sedimentological and biostratigraphic data from North Greenland reveal that the Lower Cretaceous palaeogeographic and sequence stratigraphic development in the area is comparable to that of Svalbard. This tectonically forced regression in North Greenland provides a link to a coeval well-known tectonostratigraphic event in Svalbard, indicating the regional tectono-magmatic uplift heralding the HALIP and the initiation of the Amerasia Basin.
Article
Energy & Fuels
Arka Rudra, Hamed Sanei, H. P. Nytoft, H. Petersen, Carlette Blok, Stephane Bodin, J. A. Bojesen-Koefoed
Summary: This study provides the first detailed organic geochemistry and petrography of the Lower Cretaceous tight reservoir units from the Valdemar Field in the Danish Central Graben. The reservoir units contain thermally immature marine Type II kerogen, with the more clay-rich layers acting as efficient seals for vertical migration. Evidence of significant oil migration is observed across all lithounits, with the Tuxen Formation constituting the main reservoir and showing the highest oil migration. Biomarkers indicate open-marine depositional conditions and a geochemical composition similar to oils charged from the Farsund Formation. The presence of solid bitumen within these heterogeneous reservoir units may influence reservoir quality and petrophysical properties.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
H. Petersen, F. C. Jakobsen
Summary: This paper defines the Mandal Formation in the Danish Central Graben and discusses its lithological characteristics, petroleum potential, and depositional environment. The formation is high in oil-prone shale and interbedded reservoir sandstones, formed in a marine environment with restricted oxygen supply. Mitigation structures such as the Coffee Soil Fault also play a role in the formation's composition and distribution.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geology
Steven D. Andrews, Henrik Nohr-Hansen, Pierpaolo Guarnieri, Karen Dybkjaer, Sofie Lindstroem, Peter Alsen
Summary: The structural relationships and distribution changes of Permian to Late Cretaceous strata in East Greenland are significant for regional paleogeographic reconstructions and exploration, indicating further understanding of the tectonic evolution in the area.
Article
Energy & Fuels
Henrik Petersen, Michael B. W. Fyhn, Hans Peter Nytoft, Karen Dybkjaer, Lars Henrik Nielsen
Summary: The Hanoi Trough in northern Vietnam is the landward extension of the Song Hong Basin in the South China Sea. This study examines the characteristics of Miocene coals in the Hanoi Trough using organic petrography, geochemistry, and sedimentology. The results indicate that these coals were formed in coastal mires, suggesting a relative sea-level rise in the Miocene. The dominant organic matter and biomarkers suggest the presence of gymnosperms related to Podocapaceae or Cupressaceae, as well as possibly Pinaceae. The coals are thermally immature but show evidence of liquid hydrocarbon migration and a working petroleum system in the area.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Energy & Fuels
H. I. Petersen, B. Holland, M. Olivarius
Summary: Hydrocarbon exploration onshore Denmark has been unsuccessful, but potential Zechstein carbonate plays and poor-quality source rocks have been identified in wells drilled in the Danish Baltic Sea area.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Henrik I. Petersen, Niels Springer, Rikke Weibel, Niels H. Schovsbo
Summary: This study evaluates the integrity and capacity of the seal complex in the Nini West depleted oil field in Danish North Sea as a potential storage site for CO2. The findings show that the seal complex has a high level of integrity and can hold a large amount of CO2, making it suitable for carbon capture storage.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Plant Sciences
Ali Soliman, Werner E. Piller, Karen Dybkjaer, Hamid Slimani, Gerald Auer
Summary: This study conducted pollen analysis on the Middle Miocene sediment in the Bad Deutsch-Altenburg area of the Vienna Basin, Austria for the first time. The results revealed a diverse and well-preserved in situ dinoflagellate cyst association, which showed similarities with the Middle Miocene assemblages of the Mediterranean. This suggests water exchanges between the Central Paratethys and the Mediterranean during the late Badenian.
Review
Geosciences, Multidisciplinary
Jon R. Ineson, Henrik Petersen, Claus Andersen, Morten Bjerager, Finn C. Jakobsen, Lars Kristensen, Finn Mork, Emma Sheldon
Summary: This integrated study focuses on the seismic-stratigraphic analysis of the Lower Cretaceous Cromer Knoll Group in the Danish Central Graben. The results provide insights into the distribution and sedimentation patterns of the Valhall, Tuxen, Sola, and Rodby Formations, highlighting the influence of inherited syn-rift morphology and inversion activity on the deposition process.
BULLETIN OF THE GEOLOGICAL SOCIETY OF DENMARK
(2022)
Article
Geosciences, Multidisciplinary
H. I. Petersen, F. W. H. Smit
Summary: Depleted chalk oilfields and chalk structures in the Danish Central Graben, North Sea, have the potential to be used as CO2 storage sites. This study proposes a workflow that combines mud gas data and seismic data to evaluate the seal integrity of these structures. The results show that mud gas data can provide detailed information about gas distribution, while seismic data can reveal leakage phenomena. Overall, the potential CO2 storage sites in the study area exhibit good seal integrity.
JOURNAL OF PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
H. I. Petersen, L. Lassen, A. Rudra, L. X. Nguyen, P. T. M. Do, H. Sanei
Summary: This study examines the stability of biochars produced from different agricultural waste products in southern Vietnam. The carbon stability was assessed based on organic geochemistry and petrology parameters, with higher pyrolysis temperatures resulting in increased stability. The research also found that the biochar composition and morphology were influenced by both the type of feedstock and pyrolysis temperature. Overall, the study highlights the potential of biochars as a stable carbon source.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Energy & Fuels
Agnieszka Drobniak, Maria Mastalerz, Zbigniew Jelonek, Iwona Jelonek, Tushar Adsul, Neza Malensek Andolsek, Omid Haeri Ardakani, Tara Congo, Batbold Demberelsuren, Bryon S. Donohoe, Ashley Douds, Deolinda Flores, Ranjin Ganzorig, Santanu Ghosh, Andrew Gize, Paula Alexandra Goncalves, Paul Hackley, Javin Hatcherian, James C. Hower, Stavros Kalaitzidis, Slawomir Kedzior, Wayne Knowles, Jolanta Kus, Kacper Lis, Grzegorz Lis, Bei Liu, Qingyong Luo, Meili Du, Divya Mishra, Magdalena Misz-Kennan, Theophile Mugerwa, Jennifer L. Nedzweckas, Jennifer M. K. O'Keefe, Jackie Park, Richard Pearson, Henrik I. Petersen, Julito Reyes, Joana Ribeiro, Genaro de la Rosa-Rodriguez, Piotr Sosnowski, Brett Valentine, Atul Kumar Varma, Malgorzata Wojtaszek-Kalaitzidi, Zhanjie Xu, Alexander Zdravkov, Konrad Ziemianin
Summary: Given global market trends and concerns about climate change and sustainability, the use of biomass for energy is expected to increase. Reflective light microscopy (RLM) has the potential to enhance the quality assessment of biomass fuels, but the petrographic classification used in this study requires further refinement before standardization.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Geography, Physical
Huyue Song, Shixue Hu, Michael Benton, Dayong Jiang
Summary: This article examines the end Permian to Middle Triassic interval, which witnessed a significant marine mass extinction and delayed recovery. The focus is on Triassic marine sediments in South China, providing unique documentation of the collapse and recovery of marine ecosystems. Several papers analyze different fossils and their ecological significance, while others study biostratigraphy, reconstruct paleoenvironments, and link records to volcanic eruptions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Mohammad Firoze Quamar, Upasana Swaroop Banerji, Biswajeet Thakur, Ratan Kar
Summary: The Indian Summer Monsoon is a crucial component of the Asian Monsoon System, impacting rainfall, agricultural productivity, and socio-economic growth in India and nearby regions. The central monsoon zone in India is more responsive to strong monsoon phases than weak ones.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Maria Laura Balestrieri, Valerio Olivetti, David Chew, Luca Zurli, Massimiliano Zattin, Foteini Drakou, Gianluca Cornamusini, Matteo Perotti
Summary: This study presents a multidisciplinary provenance study on legacy cores drilled in the central Ross Sea, Antarctica, providing insights into the oscillation of ice flows and advance and retreat phases of the West Antarctic Ice Sheet.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
P. Depuydt, S. Toucanne, C. Barras, S. Le Houedec, M. Mojtahid
Summary: This study provides a comprehensive overview of the dynamics of the upper branch of the Atlantic Meridional Overturning Circulation (AMOC) in the mid-latitudes of the Northeast Atlantic. It focuses on the European Slope Current (ESC) and its glacial equivalent known as the Glacial Eastern Boundary Current (GEBC). The study reveals significant changes in flow strength and ventilation during the glacial and deglaciation periods, as well as a gradual weakening of the slope current during the Holocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Junhee Park, Holly J. Stein, Judith L. Hannah, Svetoslav V. Georgiev, Oyvind Hammer, Snorre Olaussen
Summary: This study reports new Re-Os ages for black shales from Svalbard and evaluates the paleoenvironment during organic-rich shale deposition. The study also proposes correlations of specific Late Jurassic ammonite zones between the Boreal and Tethyan realms.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Guocheng Dong, Weijian Zhou, Feng Xian, Yunchong Fu, Li Zhang, Ling Tang, Pengkai Ding
Summary: The cause of ice-age cycles is still not fully understood, and studying the timing and magnitude of mountain glaciations can provide valuable insights. This study presents new dating results from the Niqingqu Valley in the Tibetan Plateau, showing multiple glacial activities prior to the Penultimate Glacial Maximum. The findings suggest that low atmospheric CO2 content and reduced summer solar insolation/high summer-monsoon precipitation played a role in these glacial fluctuations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Haoran Dong, Zhitong Chen, Yucheng Wang, Jie Chen, Zhiping Zhang, Zhongwei Shen, Xinwei Yan, Jianbao Liu
Summary: Through sediment records from Lake Nanyi in the lower Yangtze, we found that anthropogenic fire activity played a dominant role in the region, and the temporal pattern of fire activity was asynchronous from east to west. Archaeological evidence suggests an inverse relationship between agricultural and population levels and fire intensity during the mid-Holocene, with fire intensity being influenced by the diversity of landscape types associated with pre-historic subsistence patterns. Overall, changes in regional water-level delayed the transition from hunting-gathering to agriculture in the lower Yangtze region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Giovanni Coletti, Giulia Bosio, Alberto Collareta, Or Mordecai Bialik, Eleonora Regattieri, Irene Cornacchia, Gianni Insacco, John Buckeridge
Summary: This paper argues that sessile barnacles are an excellent proxy for palaeoenvironmental reconstructions. The shells of barnacles consist of diagenetically stable low-magnesium calcite and record short-term variations. Analyses of several Western Mediterranean barnacle-rich deposits demonstrate the utility of barnacles as proxies for water depth, distance from the coastline, and hydrodynamic conditions. Moreover, the stable isotope ratios of barnacle shells can provide detailed palaeoenvironmental information.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Feng Wu, Xinong Xie, Wen Yan, Youhua Zhu, Beichen Chen, Jianuo Chen, Mo Zhou
Summary: This paper describes the Quaternary evolution of Meiji Atoll in the southern South China Sea. The findings show how variations in sea surface temperature, eustatic sea level, and tectonics have influenced the development of the atoll. These findings have broader implications for understanding the Quaternary evolution of similar tropical carbonate atolls in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Ana Mateos, Ericson Hoelzchen, Jesus Rodriguez
Summary: The Epivillafranchian and the transition to the Galerian was a period of environmental fluctuations and faunal turnover. Hominins and giant hyenas could coexist during the Epivillafranchian, but the transition to the Galerian led to a disruption of the scavenging niche, coinciding with the extinction of P. brevirostris.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Tianyu Du, Wensheng Zhang, Bing Li, Linjing Liu, Yuecong Li, Yawen Ge, Shiyong Yu
Summary: This article presents sedimentary evidence for a dramatic channel displacement of the lower Yellow River about 3000-2600 years ago, and explains the impact of this displacement on the geomorphology and human migration.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Johann Mueller, Michael M. Joachimski, Oliver Lehnert, Peep Mannik, Yadong Sun
Summary: The Late Ordovician mass extinction occurred during an ice age, with maximum ice coverage and a substantial drop in global sea level. This led to the exposure or shallowing of shallow tropical shelf environments. The study suggests that the burial rate of nutrient phosphorus (P) on shelves was minimal during this glacial period, leading to excess bioavailable P entering the open ocean and stimulating phytoplankton production, which in turn lowered oxygen concentrations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Marina Addante, Patrizia Maiorano, Giovanna Scopelliti, Angela Girone, Maria Marino, Samanta Trotta, Antonio Caruso
Summary: This study presents the first high-resolution results on planktonic foraminiferal stable oxygen isotopes and calcareous plankton assemblages, providing insights into the glacial-interglacial variability and North Atlantic climate variability. The research also reveals evidence of the first significant southward migration of the Subarctic Front in the mid-latitudes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Bing-Cai Liu, Rui-Wen Zong, Kai Wang, Jiao Bai, Yi Wang, Hong-He Xu
Summary: Phytogeography plays a vital role in the evolution of plants. This paper describes a new species of a spore-bearing plant from the upper Silurian period in West Junggar, China. By analyzing global Silurian macrofossil records, the study reveals the spatial-temporal distribution of Silurian plant macrofossils and identifies two phytogeographic realms during the Pridoli Epoch.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Francois Fournier, Thomas Teillet, Alexis Licht, Jean Borgomano, Lucien Montaggioni
Summary: This study investigates the temporal evolution of neritic carbonates in the proto-South China Sea to reconstruct East Asian monsoonal currents and winds during the middle to late Paleogene. The results highlight that many of the features of the summer East Asian Monsoon large-scale circulation are rooted in the middle Paleogene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)