Publications
401 results found
Reeve M, Magee C, Bastow I, et al., 2021, Nature of the Cuvier Abyssal Plain crust, offshore NW Australia
Pichel L, Jackson C, Peel F, et al., 2021, The Merluza Graben: how a failed spreading centre influenced margin structure, salt deposition and tectonics in the Santos Basin, Brazil
Norcliffe J, Magee C, Jackson CAL, et al., 2021, Fault inversion contributes to ground deformation above inflating igneous sills, Volcanica, Vol: 4, Pages: 1-21
Space for magma is commonly generated by uplift of the overburden and free surface. If this deformation is elastic, we can invert the shape and kinematics of ground movement to model the geometry and dynamics of underlying intrusions. However, magma emplacement can be spatially accommodated by viscoelastic and/or plastic host rock deformation, although few studies have quantified the contributions of these processes. We restore ground deformation above a sill, imaged in 3D seismic reflection data, and show that: (i) where uplift equalled sill thickness, host rock bending accommodated intrusion; but (ii) where sill thickness exceeded uplift, normal fault inversion and overburden compaction generated space for intrusion. Our results support work showing intrusion-induced ground deformation may be restricted if multiple deformation processes accompany emplacement. We also demonstrate intrusion-induced uplift can drive fault inversion, meaning the present pattern of displacement on the faults surface may not reflect its tectonic growth history.
Abu C, Francis M, Jackson CAL, 2021, Strike-slip overprinting of initial co-axial shortening within the toe region of a submarine landslide: A case study from the Angoche Basin, offshore Mozambique, Pages: 1146-1150, ISSN: 1052-3812
Submarine landslides (slides) are some of the most voluminous sediment gravity flows on Earth and they dominate the stratigraphic record of many subaqueous basins. The general kinematics and internal structure of slides are relatively well understood, although the way in which they increase in volume and internally deform as they evolve, and how these processes relate to the development of their basal (shear) surface, remains largely unknown. We here use three high-resolution 3D seismic surveys (two broadband time-migrated seismic reflection datasets and a depth-migrated volume) from the Angoche Basin, offshore Mozambique to undertake detailed mapping and intra-slide strain analysis of a shallowly buried, large, and thus well-imaged submarine landslide (c. 530 km3). We also provide detailed documentation of the along-strike variations in the structural style and evolution of the toe region, and how these relate to the overall emplacement of the slide. Seismic attribute analysis image several key kinematic indicators, including broadly NW-trending (i.e., flow-parallel) lateral margins, longitudinal shears, and sub-orthogonal shears in the main body of the deposit, and broadly NE-trending (i.e., flow-normal) symmetric pop-up blocks in the toe region. The slide exhibits varying degrees of frontal emergence along strike, displaying a single frontal (toe) wall in the SW to a more complex, stair-step geometry in the NE. Basal grooves are noticeably absent, with a key observation being that contractional structures are locally observed c. 7 km downdip of the present toe wall. Based on the distribution of cross-cutting relationship between intra-slide structures, we propose an emplacement model involving two distinct phases of deformation; (i) bulk shortening, parallel to the overall SE-directed emplacement direction, accommodated by the formation of NE-trending symmetric pop-up blocks bound by fore-thrusts and back-thrusts; and (ii) the development of NW-trending sinistral
Jackson CA-L, McAndrew AE, Hodgson DM, et al., 2021, REPEATED DEGRADATION AND PROGRADATION OF A SUBMARINE SLOPE OVER GEOLOGICAL TIMESCALES, JOURNAL OF SEDIMENTARY RESEARCH, Vol: 91, Pages: 116-145, ISSN: 1527-1404
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- Citations: 4
Cumberpatch ZA, Kane IA, Soutter EL, et al., 2021, INTERACTIONS BETWEEN DEEP-WATER GRAVITY FLOWS AND ACTIVE SALT TECTONICS, JOURNAL OF SEDIMENTARY RESEARCH, Vol: 91, Pages: 34-65, ISSN: 1527-1404
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- Citations: 16
Pichel LM, Jackson CA-L, 2020, Four-dimensional Variability of Composite Halokinetic Sequences, BASIN RESEARCH, Vol: 32, Pages: 1277-1299, ISSN: 0950-091X
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- Citations: 13
Chiarella D, Yarbrough J, Jackson CA-L, 2020, Using alt text to make science Twitter more accessible for people with visual impairments, NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
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- Citations: 5
Fazlikhani H, Aagotnes SS, Refvem MA, et al., 2020, Strain migration during multiphase extension, Stord Basin, northern North Sea rift, Basin Research, Vol: 33, Pages: 1474-1496, ISSN: 0950-091X
In regions experiencing multiple phases of extension, rift-related strain can vary along and across the basin during and between each phase, and the location of maximum extension can differ between the rift phase. Despite having a general understanding of multiphase rift kinematics, it remains unclear why the rift axis migrates between extension episodes. The role pre-existing structures play in influencing fault and basin geometries during later rifting events is also poorly understood. We study the Stord Basin, northern North Sea, a location characterised by strain migration between two rift episodes. To reveal and quantify the rift kinematics, we interpreted a dense grid of 2D seismic reflection profiles, produced time-structure and isochore (thickness) maps, collected quantitative fault kinematic data and calculated the amount of extension (β-factor). Our results show that the locations of basin-bounding fault systems were controlled by pre-existing crustal-scale shear zones. Within the basin, Permo-Triassic Rift Phase 1 (RP1) faults mainly developed orthogonal to the E-W extension direction. Rift faults control the locus of syn-RP1 deposition, whilst during the inter-rift stage, areas of clastic wedge progradation are more important in controlling sediment thickness trends. The calculated amount of RP1 extension (β-factor) for the Stord Basin is up to β = 1.55 (±10%, 55% extension). During the subsequent Middle Jurassic-Early Cretaceous Rift Phase 2 (RP2), however, strain localised to the west along the present axis of the South Viking Graben, with the Stord Basin being almost completely abandoned. Rift axis migration during RP2 is interpreted to be related to changes in lithospheric strength profile, possibly related to the ultraslow extension (<1 mm/year during RP1), the long period of tectonic quiescence (ca. 50 myr) between RP1 and RP2 and possible underplating. Our results highlight the very heterogeneous nature of temporal and lat
Pichel LM, Jackson CA-L, 2020, The enigma of the Albian Gap: spatial variability and the competition between salt expulsion and extension, JOURNAL OF THE GEOLOGICAL SOCIETY, Vol: 177, Pages: 1129-1148, ISSN: 0016-7649
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- Citations: 12
Nugraha HD, Jackson CA-L, Johnson HD, et al., 2020, Lateral variability in strain along the toewall of a mass transport deposit: a case study from the Makassar Strait, offshore Indonesia, JOURNAL OF THE GEOLOGICAL SOCIETY, Vol: 177, Pages: 1261-1279, ISSN: 0016-7649
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- Citations: 13
Armstrong ES, Persaud DM, Jackson CA-L, et al., 2020, Redefining the scientific conference, PHYSICS WORLD, Vol: 33, Pages: 21-21, ISSN: 0953-8585
Steventon MJ, Jackson CA-L, Hodgson DM, et al., 2020, LATERAL VARIABILITY OF SHELF-EDGE AND BASIN-FLOOR DEPOSITS, SANTOS BASIN, OFFSHORE BRAZIL, JOURNAL OF SEDIMENTARY RESEARCH, Vol: 90, Pages: 1198-1221, ISSN: 1527-1404
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- Citations: 10
Ge Z, Gawthorpe RL, Rotevatn A, et al., 2020, Minibasin depocentre migration during diachronous salt welding, offshore Angola, BASIN RESEARCH, Vol: 32, Pages: 875-893, ISSN: 0950-091X
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- Citations: 9
Dowey N, Barclay J, Fernando B, et al., 2020, Diversity Crisis in UK Geoscience Research Training
Phillips TB, Jackson CA-L, Norcliffe JR, 2020, Pre-inversion normal fault geometry controls inversion style and magnitude, Farsund Basin, offshore southern Norway, SOLID EARTH, Vol: 11, Pages: 1489-1510, ISSN: 1869-9510
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- Citations: 12
Claringbould JS, Bell RE, Jackson CA, et al., 2020, Pre‐breakup extension in the northern North Sea defined by complex strain partitioning and heterogeneous extension rates, Tectonics, Vol: 39, Pages: 1-29, ISSN: 0278-7407
The early stages of continental rifting are accommodated by the growth of upper‐crustal normal fault systems that are distributed relatively evenly across the rift width. Numerous fault systems define fault arrays , the kinematics of which are poorly understood due to a lack of regional studies drawing on high‐quality subsurface data. Here we investigate the long‐term (~150 Myr) growth of a rift‐related fault array in the East Shetland Basin, northern North Sea, using a regionally extensive subsurface dataset comprising 2D and 3D seismic reflection surveys and 107 boreholes. We show that rift‐related strain during the pre‐Triassic‐to‐Middle Triassic was originally distributed across several sub‐basins. The Middle‐to‐Late Triassic saw a decrease in extension rate (~14 m/Myr) as strain localized in the western part of the basin. Early Jurassic strain initially migrated eastwards, before becoming more diffuse during the main, Middle‐to‐Late Jurassic rift phase. The highest extension rates (~89 m/Myr) corresponded with the main rift event in the East Shetland Basin, before focusing of strain within the rift axis and ultimate abandonment of the East Shetland Basin in the Early Cretaceous. We also demonstrate marked spatial variations in timing and magnitude of slip along‐strike of major fault systems during this protracted rift event. Our results imply that strain migration patterns and extension rates during the initial, pre‐breakup phase of continental rifting may be more complex than previously thought; this reflects temporal and spatial changes in both thermal and mechanical properties of the lithosphere, in addition to varying extension rates.
Oppo D, Evans S, Iacopini D, et al., 2020, Leaky salt: pipe trails record the history of cross-evaporite fluid escape in the northern Levant Basin, Eastern Mediterranean
Evans S, Jackson C, Oppo D, 2020, Taking the pulse of salt-detached gravity gliding in the eastern Mediterranean
Jackson CA-L, Duffy OB, Fernandez N, et al., 2020, The stratigraphic record of minibasin subsidence, Precaspian Basin, Kazakhstan, BASIN RESEARCH, Vol: 32, Pages: 739-763, ISSN: 0950-091X
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- Citations: 17
Wu N, Jackson C, Johnson H, et al., 2020, The formation and implications of giant blocks and fluid escape structures in submarine lateral spreads
Britton TB, Jackson CA-L, Wade J, 2020, The reward and risk of social media for academics, Publisher: Center for Open Science
We are three academics who are active on social media. We explore the motivations for and benefits of engaging with social media, as well as its costs and risks. Overall, we believe this engagement to be a net benefit for us, our employers and for wider society.
Sun Q, Magee C, Jackson CA-L, et al., 2020, How do deep-water volcanoes grow?, EARTH AND PLANETARY SCIENCE LETTERS, Vol: 542, ISSN: 0012-821X
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- Citations: 12
Fernandes A, Abeyta A, Mahon R, et al., 2020, “Enriching Lives within Sedimentary Geology”: Actionable Recommendations for Making SEPM a Diverse, Equitable and Inclusive Society for All Sedimentary Geologists
Erdi A, Jackson C, 2020, What Controls Salt‐Detached Contraction in the Translational Domain of the Outer Kwanza Basin, Offshore Angola?
Evans S, Jackson C, 2020, Intrasalt Structure and Strain Partitioning in Layered Evaporites: Implications for Drilling Through Messinian Salt in the Eastern Mediterranean
Jackson CA-L, Whipp PS, Gawthorpe RL, et al., 2020, Structure and kinematics of an extensional growth fold, Hadahid Fault System, Suez Rift, Egypt, SOLID EARTH, Vol: 11, Pages: 1027-1051, ISSN: 1869-9510
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- Citations: 3
Fazlikhani H, Aagotnes S, Refvem M, et al., 2020, Strain migration during multiphase extension, Stord Basin, northern North Sea rift, Publisher: California Digital Library (CDL)
In multirifted regions, rift-related strain varies along and across the basin during and between each extensional event, and the location of maximum extension often differs between rift phases. Despite having a general understanding of multiphase rift kinematics, it remains unclear why some parts of the rift are abandoned, with strain accumulating in previously less deformed areas, and how seismic and sub-seismic scale pre-existing structures influence fault and basin geometries. We study the Stord Basin, northern North Sea, a location characterized by strain migration between two rift episodes. To reveal and quantify the kinematics, we interpreted a dense grid of 2D seismic reflection profiles, produced time-structure and isochore maps, collected quantitative fault kinematic data and calculated the amount of extension (β-factor). Our results show that the locations of basin-bounding fault systems were controlled by pre-existing crustal-scale shear zones. Within the basin, rift faults mainly developed at high angles to the Permo-Triassic Rift Phase 1 (RP1) E-W extension. Rift faults control the locus of syn-RP1 deposition, whilst during the inter-rift stage, sedimentary processes (e.g. areas of clastic wedge progradation) are more important in controlling sediment thickness trends.The calculated amount of RP1 extension (β-factor) for the Stord Basin is up to β=1.55 (±10%, 55% extension). During Middle Jurassic-Early Cretaceous (Rift Phase 2, RP2) however, strain localises to the west along the present axis of the South Viking Graben, with the Stord Basin being almost completely abandoned. Migration of rift axis during RP2 is interpreted to be related to the changes in lithospheric strength profile and possible underplating due to the ultraslow extension (<2mm/yr during RP1) and the long period of tectonic quiescence (ca. 70 myr) between RP1 and RP2. Our results highlight the very heterogeneous nature of temporal and lateral strain migration
Lathrop B, Jackson C, Bell R, et al., 2020, Normal fault kinematics and the role of lateral tip retreat: An example from offshore NW Australia
Jackson C, Whipp P, Gawthorpe R, et al., 2020, Structure and kinematics of an extensional growth fold, Hadahid Fault System, Suez Rift, Egypt
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