Thomas Birchall
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View article: High-resolution digital outcrop model of the faults, fractures, and stratigraphy of the Agardhfjellet Formation cap rock shales at Konusdalen West, central Spitsbergen
High-resolution digital outcrop model of the faults, fractures, and stratigraphy of the Agardhfjellet Formation cap rock shales at Konusdalen West, central Spitsbergen Open
Structure-from-motion (SfM) photogrammetry has become an important tool for the digitalisation of outcrops as digital outcrop models (DOMs). DOMs facilitate the mapping of stratigraphy and discontinuous structures like folds, faults, and f…
View article: Permafrost trapped natural gas in Svalbard, Norway
Permafrost trapped natural gas in Svalbard, Norway Open
Permafrost is widespread in the High Arctic, including the Norwegian archipelago of Svalbard. The uppermost permafrost intervals have been well studied, but the processes at its base and the impacts of the underlying geology have been larg…
View article: Svalbox Digital Model Database: A geoscientific window into the High Arctic
Svalbox Digital Model Database: A geoscientific window into the High Arctic Open
Digital outcrop models (DOMs) have revolutionized the way twenty-first century geoscientists work. DOMs are georeferenced three-dimensional (3-D) digital representations of outcrops that facilitate quantitative work on outcrops at various …
View article: Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard)
Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) Open
Sedimentary injectites are increasingly documented in many hydrocarbon plays at various scales, either interpreted as potential risks (e.g., topseal bypass, a drilling hazard) or benefits (e.g., reservoir interconnection, increased hydroca…
View article: Investigating sub-seismic sedimentary intrusions in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard)
Investigating sub-seismic sedimentary intrusions in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) Open
Meso-scale (sub-seismic) sedimentary injectites are inferred to play an important role in controlling subsurface fluid flow as documented in many hydrocarbon plays at various scales. Detailed characterisation of such units, usually unresol…
View article: Svalbard Composite Tectono-Sedimentary Element, Barents Sea
Svalbard Composite Tectono-Sedimentary Element, Barents Sea Open
The Svalbard Composite Tectono-Sedimentary Element (SCTSE) is located on the northwestern corner of the Barents Shelf and comprises a Carboniferous–Pleistocene sedimentary succession. Due to Cenozoic uplift, the succession is subaerially e…
View article: High resolution digital outcrop model of faults and fractures in caprock shales, Konusdalen West, central Spitsbergen
High resolution digital outcrop model of faults and fractures in caprock shales, Konusdalen West, central Spitsbergen Open
Structure-from-motion (SfM) photogrammetry has become an important tool for quantitative characterisation of outcrops. Digital outcrop models (DOMs) allow for the mapping of stratigraphy and discontinuous structures like folds, faults and …
View article: Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) [Supplementary material/digital model data]
Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) [Supplementary material/digital model data] Open
Supplementary model data for the publication Ogata et al. (in review): Most of the models suffer from incorrect location metadata, limiting their use to mostly qualitative interpretations. Shallow and deep subsurface sediment remobilizatio…
View article: Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) [Supplementary material/digital model data]
Shallow and deep subsurface sediment remobilization and intrusion in the Middle Jurassic to Lower Cretaceous Agardhfjellet Formation (Svalbard) [Supplementary material/digital model data] Open
Supplementary model data for the publication Ogata et al. (in review): Most of the models suffer from incorrect location metadata, limiting their use to mostly qualitative interpretations. Shallow and deep subsurface sediment remobilizatio…
View article: Svalbox-DOM_2019-0019_Criocerasdalen
Svalbox-DOM_2019-0019_Criocerasdalen Open
Model description: Outcrop model of the faulted caprock shales of the Janusfjellet Subgroup in Criocerasdalen. The faulted, mudstone-dominated sequences form the caprock to the proposed Longyearbyen CO2 Lab reservoir. Obs: Images contain a…
View article: Svalbox-DOM_2019-0020_Deltaneset
Svalbox-DOM_2019-0020_Deltaneset Open
Model description: Digital outcrop model of the cliffs along the first beach section to the east of Deltaneset, i.e., in the direction of Diabasodden. These form the reservoir units for the proposed Longyearbyen CO2 Lab reservoir. Data a…
View article: Svalbox-DOM_2019-0020_Deltaneset
Svalbox-DOM_2019-0020_Deltaneset Open
Model description: Digital outcrop model of the cliffs along the first beach section to the east of Deltaneset, i.e., in the direction of Diabasodden. These form the reservoir units for the proposed Longyearbyen CO2 Lab reservoir. Data a…
View article: Svalbox-DOM_2019-0019_Criocerasdalen
Svalbox-DOM_2019-0019_Criocerasdalen Open
Model description: Outcrop model of the faulted caprock shales of the Janusfjellet Subgroup in Criocerasdalen. The faulted, mudstone-dominated sequences form the caprock to the proposed Longyearbyen CO2 Lab reservoir. Obs: Images contain a…
View article: Naturally occurring underpressure – a global review
Naturally occurring underpressure – a global review Open
Several mechanisms have been suggested as drivers of naturally occurring underpressure. However, the phenomenon is largely underrepresented in literature. Previous studies have focused on individual cases in North America, where challenges…
View article: Reply on RC1
Reply on RC1 Open
Permafrost has become an increasingly important subject in the High Arctic archipelago of Svalbard. However, whilst the uppermost permafrost intervals have been well studied, the processes at its base and the impacts of the underlying geol…
View article: Reply on RC3
Reply on RC3 Open
Permafrost has become an increasingly important subject in the High Arctic archipelago of Svalbard. However, whilst the uppermost permafrost intervals have been well studied, the processes at its base and the impacts of the underlying geol…
View article: Reply on RC2
Reply on RC2 Open
Permafrost has become an increasingly important subject in the High Arctic archipelago of Svalbard. However, whilst the uppermost permafrost intervals have been well studied, the processes at its base and the impacts of the underlying geol…
View article: Teaching with digital geology in the high Arctic: opportunities and challenges
Teaching with digital geology in the high Arctic: opportunities and challenges Open
The Covid-19 pandemic occurred at a time of major revolution in the geosciences – the era of digital geology. Digital outcrop models (DOMs) acquired from consumer drones, processed using user-friendly photogrammetric software and shared wi…
View article: Comment on tc-2021-226
Comment on tc-2021-226 Open
Abstract. Permafrost has become an increasingly important subject in the High Arctic archipelago of Svalbard. However, whilst the uppermost permafrost intervals have been well studied, the processes at its base and the impacts of the under…
View article: Review Article: Permafrost Trapped Natural Gas in Svalbard, Norway
Review Article: Permafrost Trapped Natural Gas in Svalbard, Norway Open
Permafrost has become an increasingly important subject in the High Arctic archipelago of Svalbard. However, whilst the uppermost permafrost intervals have been well studied, the processes at its base and the impacts of the underlying geol…
View article: Comment on gc-2021-9
Comment on gc-2021-9 Open
Abstract. The COVID-19 pandemic hindered the ability to conduct field geology courses in a hands-on and boots-on traditional manner. In response, we designed a multi-part virtual field module that encompasses many of the basic requirements…
View article: Teaching with digital geology in the high Arctic: opportunities and challenges
Teaching with digital geology in the high Arctic: opportunities and challenges Open
The Covid-19 pandemic occurred at a time of major revolution in the geosciences – the era of digital geology. Digital outcrop models (DOMs) acquired from consumer drones, processed using user-friendly photogrammetric software and shared wi…
View article: Underpressure in the northern Barents shelf: Causes and implications for hydrocarbon exploration
Underpressure in the northern Barents shelf: Causes and implications for hydrocarbon exploration Open
The underexplored Barents shelf petroleum province is a globally unique example where naturally occurring underpressure is observed offshore and onshore. In the offshore parts of the northern Barents shelf, minor underpressure (up to 23 ba…
View article: Resistivity of reservoir sandstones and organic rich shales on the Barents Shelf: Implications for interpreting CSEM data
Resistivity of reservoir sandstones and organic rich shales on the Barents Shelf: Implications for interpreting CSEM data Open
Marine controlled source electromagnetic (CSEM) data have been utilized in the past decade during petroleum exploration of the Barents Shelf, particularly for de-risking the highly porous sandstone reservoirs of the Upper Triassic to Middl…
View article: Digital Drill Core Models: Structure-from-Motion as a Tool for the Characterisation, Orientation, and Digital Archiving of Drill Core Samples
Digital Drill Core Models: Structure-from-Motion as a Tool for the Characterisation, Orientation, and Digital Archiving of Drill Core Samples Open
Structure-from-motion (SfM) photogrammetry enables the cost-effective digital characterisation of seismic- to sub-decimetre-scale geoscientific samples. The technique is commonly used for the characterisation of outcrops, fracture mapping,…
View article: Discovery of shale gas in organic-rich Jurassic successions, Adventdalen, Central Spitsbergen, Norway
Discovery of shale gas in organic-rich Jurassic successions, Adventdalen, Central Spitsbergen, Norway Open
Thermogenic dry gas flowed from Jurassic sections in the DH5R research well drilled onshore in Adventdalen, central Spitsbergen, Arctic Norway. The DH5R gas originates from the organic-rich units of the mudstone-dominated Middle Jurassic t…