Article
Multidisciplinary Sciences
Priyadarshi Chinmoy Kumar, Tiago M. Alves, Kalachand Sain
Summary: This study investigates how submarine canyon systems can focus sub-surface fluid using a high-quality 3D seismic volume from offshore Canterbury Basin, New Zealand. The results reveal multiple pockmarks, eroded gullies, and intra-slope lobe complexes associated with the Waitaki Submarine Canyon. The findings suggest that subsurface fluid may migrate from Cretaceous strata through shallow channel-fill deposits and lobes to seep out through the canyon and associated gullies.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Abosede O. Abubakre, Michiel O. de Kock
Summary: The study presents rock and paleomagnetic magnetic analyses of the lower Ecca Group in the southwestern Karoo Basin, South Africa, proposing an Artinskian to Kungurian age for the rocks. By constructing a magnetostratigraphic profile, the first composite profile spanning the entire Ecca Group in the region is produced.
Article
Geology
Mengnan Liu, Hao Liu, Antonius Johannes (Tom) van Loon, Jie Xu, Shimeng Hao, Yingzhao Zhang
Summary: Based on high-quality seismic profiles and well data, this study analyzed the seismic reflection characteristics of the late Pliocene and Pleistocene succession in the Qiongdongnan Basin in the South China Sea. The study identified different clinothem types and their geometric parameters, as well as the relationships between them and controlling factors. Additionally, the study examined the development of lowstand fans at the foot of the slope. The findings have significant implications for understanding the characteristics and development of continental slopes in the Qiongdongnan Basin and other basins.
Article
Geochemistry & Geophysics
M. O. De Kock, A. O. Abubakre
Summary: Paleomagnetic results for a magnetostratigraphic section of Permian rocks in the Karoo Basin of South Africa are reported. The study identifies titanomagnetite as the carrier of the recorded magnetization, which represents the Permian geomagnetic field during a reverse polarity superchron and subsequent mixed polarity interval. The timing of the magnetization is further constrained by Jurassic-aged dolerite intrusions. A paleopole is calculated based on the primary remanence, and the end of the Kiaman Reverse Polarity Superchron is correlated across the basin.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Multidisciplinary Sciences
Pia A. Viglietti, Roger B. J. Benson, Roger M. H. Smith, Jennifer Botha, Christian F. Kammerer, Zaituna Skosan, Elize Butler, Annelise Crean, Bobby Eloff, Sheena Kaal, Joel Mohoi, William Molehe, Nolusindiso Mtalana, Sibusiso Mtungata, Nthaopa Ntheri, Thabang Ntsala, John Nyaphuli, Paul October, Georgina Skinner, Mike Strong, Hedi Stummer, Frederik P. Wolvaardt, Kenneth D. Angielczyk
Summary: The study analyzed fossil data from South Africa's Karoo Basin, revealing a period of high extinction rates lasting approximately 1 million years during the Permo-Triassic Transition. This period was characterized by rapid turnover and the emergence of short-lived species, indicating ecosystem instability.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Geology
Kevin Boulesteix, Miquel Poyatos-More, Stephen S. Flint, David M. Hodgson, Kevin T. Taylor, Rufus L. Brunt
Summary: This study investigates the sedimentology and stratigraphy of mudstones in the Laingsburg depocentre of the Karoo Basin, South Africa. It presents criteria to distinguish between slope and basin-floor mudstones and discusses their depositional processes and facies organization. The findings challenge the common attribution of deep-water mudstones to periods of sediment starvation, suggesting mud can be delivered to deep-water environments dominantly by sediment gravity flows.
DEPOSITIONAL RECORD
(2022)
Article
Geosciences, Multidisciplinary
L. A. S. Hansen, R. S. Healy, L. Gomis-Cartesio, D. R. Lee, D. M. Hodgson, A. Ponten, R. J. Wild
Summary: This study documents a large-scale, composite erosion surface from the exhumed deep-marine stratigraphy of Unit 5 from the Permian Karoo Basin succession in South Africa. The study utilizes sedimentary logs, cored boreholes, and extensive data to identify lower heterolithic-dominated and upper sandstone-dominated parts separated by an erosion surface. The findings provide insights into the formation and evolution of submarine channels and the transition from erosion-dominated flows to depositional flows in deep-marine systems.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
T. M. Tladi, J. M. Ndambuki, R. W. Salim
Summary: This study assessed the adequacy of NCEP-CFSR and ERA5 rainfall data in monitoring meteorological drought in the Upper Olifants sub-basin, South Africa. The results showed that ERA5 had better correlation, lower error, and lower bias compared to CFSR. ERA5 also detected more major drought events. The study concluded that ERA5 is a better product for meteorological drought monitoring in the study area.
PHYSICS AND CHEMISTRY OF THE EARTH
(2022)
Article
Energy & Fuels
Okwudiri A. Anyiam, Nicholas Hoggmascall, Daniel K. Amogu
Summary: The study investigates how the basin margin sediment wedge influences shelf-edge migration over time in the eastern Niger Delta using high-resolution seismic data, identifying different sediment characteristics along the shelf edge in different regions with varying structural styles.
JOURNAL OF PETROLEUM EXPLORATION AND PRODUCTION TECHNOLOGY
(2021)
Article
Environmental Sciences
Tsholofelo Mmankwane Tladi, Julius Musyoka Ndambuki, Thomas Otieno Olwal, Sophia Sudi Rwanga
Summary: This study utilized a Gradient Boosting (GB) regression modeling approach to predict groundwater levels based on rainfall and antecedent groundwater levels. Correlation and trend analyses were conducted to understand the relationship between groundwater levels and climate events. The GB predictive model performed well for all groundwater stations, demonstrating its potential for future groundwater level predictions.
Article
Geosciences, Multidisciplinary
Donald N. Christie, Frank J. Peel, Gillian M. Apps, David Stan Stanbrook
Summary: The stratal architecture of deep-water minibasins is mainly controlled by the interplay of structure growth and sediment supply. Through the use of a reduced-complexity computational method, this study successfully identified different compressional phases and a salt withdrawal/diapirism event in the Miocene sediments, providing insight into sediment types and key geological surfaces within the stratigraphy.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Jinan Guan, Xiaorong Cong, David E. Archer, Lihua Wan, Deqing Liang
Summary: This study investigates the distribution and development potential of stratigraphic-diffusive hydrate reservoirs formed by biogenic methane flowing laterally into hydrate stable zones. Through analysis of the Pearl River Mouth Basin in the northern slope of the South China Sea, the research reveals the accumulation mechanism and distribution pattern of stratigraphic-diffusive methane hydrates in this region, as well as the influence of geological conditions and controlling factors on the evolution process. The two-dimensional model designed in this study effectively depicts the occurrence and accumulation characteristics of stratigraphic-diffusive hydrates, demonstrating their exploration value and exploitation possibility.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Nils Lenhardt, Christophe Galerne, Petrus Le Roux, Annette E. Goetz, Francois J. P. Loetter
Summary: The igneous intrusions of the Karoo Large Igneous Province (LIP) provide important information on the magma plumbing system and its role in source rock maturation and fluid flow. The study reveals that at least one of the intrusions acted as a reservoir for CO2 sequestration.
Article
Environmental Sciences
Oksana Rybchak, Justin du Toit, Jean-Pierre Delorme, Jens-Kristian Juedt, Mari Bieri, Guy Midgley, Kanisios Mukwashi, Christian Thau, Gregor Feig, Antje Lucas-Moffat, Christian Bruemmer
Summary: This study finds that long-term resting of overutilized semi-arid vegetation in southern Africa can lead to enhanced carbon sequestration potential, even when vegetation composition has been transformed due to overutilization. However, this enhanced potential can be quickly diminished by reintroduction of grazing, even after a period of 10 years of resting. The achievement of carbon sequestration in these ecosystems is influenced by average to above-average precipitation and its distribution throughout the year, with sequestration activity mostly observed after seasonal rains during the warm season.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Marine & Freshwater Biology
Errol Wiles, Carlos Loureiro, Hayley Cawthra
Summary: Coastal erosion can have significant socio-economic consequences, but changes in shoreline position are not always indicative of increased coastal hazards. This study investigated short-term shoreline changes in a specific embayment in Mossel Bay, South Africa, and found that while there were significant variations in wave conditions and shoreline position, the areas experiencing the highest shoreline change did not necessarily have the worst detrimental effects. The study highlights the importance of understanding the site-specific dynamics and vulnerabilities of coastal areas.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Timothy M. Cullen, Richard E. Ll. Collier, Robert L. Gawthorpe, David M. Hodgson, Bonita J. Barrett
Article
Geology
Jeff Peakall, Jim Best, Jaco H. Baas, David M. Hodgson, Michael A. Clare, Peter J. Talling, Robert M. Dorrell, David R. Lee
Article
Geography, Physical
Stephen J. Eaton, David M. Hodgson, Natasha L. M. Barlow, Estelle E. J. Mortimer, Claire L. Mellett
JOURNAL OF QUATERNARY SCIENCE
(2020)
Article
Geosciences, Multidisciplinary
Harya D. Nugraha, Christopher A. -L. Jackson, Howard D. Johnson, David M. Hodgson
JOURNAL OF THE GEOLOGICAL SOCIETY
(2020)
Article
Geosciences, Multidisciplinary
Bonita J. Barrett, David M. Hodgson, Christopher A. -L. Jackson, Christopher Lloyd, Junia Casagrande, Richard E. Ll. Collier
Summary: Interactions between footwall-, hangingwall- and axial-derived depositional systems in rift basins make stratigraphic architecture prediction challenging. Distinguishing between deposits derived from fault-scarp degradation and long-lived catchments is crucial for hydrocarbon exploration. The study emphasizes the need to consider multiple sediment sources for tectono-stratigraphic models in rift basins.
Article
Geosciences, Multidisciplinary
L. A. S. Hansen, D. M. Hodgson, A. Ponten, C. Thrana, A. Obradors Latre
Summary: The study of the Halten and Donna terraces in offshore mid-Norway reveals that sedimentation in weakly confined post-rift sub-basins is predominantly influenced by axial and transverse sources, leading to a complex stratigraphic architecture.
Article
Geology
Aurelia M-L J. Privat, David M. Hodgson, Christopher A-L Jackson, Ernesto Schwarz, Jeff Peakall
Summary: The study reveals the stratigraphic architecture of Early Jurassic strata along the Chachil Graben, documenting the sedimentological and stratigraphic expression of the syn-rift to post-rift transition, as well as variations in sediment supply and dispersal patterns across rift-related topography. The effects of sediment gravity flows on intraslope lobes are highlighted, along with the influence of inherited compaction hinges on early post-rift lobes.
Article
Geosciences, Multidisciplinary
Euan L. Soutter, Ian A. Kane, David M. Hodgson, Stephen Flint
Summary: Submarine canyons are important conduits for sediment transport, with tectonics being the dominant control on their concavity. The position of canyons and present-day onshore climate also influence their concavity.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Geology
Jaco H. Baas, Megan L. Baker, Patricia Buffon, Lorna J. Strachan, Helen C. Bostock, David Hodgson, Joris T. Eggenhuisen, Yvonne T. Spychala
Summary: A revised equation for the hindered settling of non-cohesive particles in fluids is proposed in this study, based on a large dataset from various scientific fields. This equation allows for predictions of settling velocity for different particle sizes, densities, and fluid conditions, with a focus on sediment particles in water. The study also reveals that hindered settling becomes more significant as particle size decreases, and even a small percentage of particle concentration can affect the settling behavior.
DEPOSITIONAL RECORD
(2022)
Article
Geology
Charlotte Allen, Luz E. Gomis-Cartesio, David M. Hodgson, Jeff Peakall, Juan-Pablo Milana
Summary: This study documents the evolution of two adjacent and partially contemporaneous submarine channel-fills, highlighting the formation of submarine landslides and their impact on geomorphology changes. The channels show deep incision and steep lateral margins, with the landslide material being covered by stepped basal erosion surfaces and clasts. This study provides insight into the complex sedimentary processes associated with submarine landslides and their influence on channel evolution.
DEPOSITIONAL RECORD
(2022)
Article
Geology
Hannah L. Brooks, Makoto Ito, Valentin Zuchuat, Jeff Peakall, David M. Hodgson
Summary: This article presents a rare example of an exhumed channel-lobe transition zone from an active-margin setting in Japan. The study reveals obliquity-driven glacioeustatic sea-level cycles and the impact of climate changes on stratigraphic architecture.
DEPOSITIONAL RECORD
(2022)
Article
Geology
Kevin Boulesteix, Miquel Poyatos-More, Stephen S. Flint, David M. Hodgson, Kevin T. Taylor, Rufus L. Brunt
Summary: This study investigates the sedimentology and stratigraphy of mudstones in the Laingsburg depocentre of the Karoo Basin, South Africa. It presents criteria to distinguish between slope and basin-floor mudstones and discusses their depositional processes and facies organization. The findings challenge the common attribution of deep-water mudstones to periods of sediment starvation, suggesting mud can be delivered to deep-water environments dominantly by sediment gravity flows.
DEPOSITIONAL RECORD
(2022)
Article
Geosciences, Multidisciplinary
Junia Casagrande, David M. Hodgson, Jeff Peakall, Pedro Monteiro Benac
Summary: This study investigates the evolution of a sand-prone turbidite system in offshore Brazil, proposing a new stratigraphic model to explain the resultant depositional architecture impacted by vertical and lateral deformation. The study highlights the complex stratigraphic patterns resulting from subtle dynamic slope deformation punctuated by discrete sediment supply cycles, indicating repeated cycles of fill-and-spill, tilt-and-repeat in other stepped slope systems.
Article
Geosciences, Multidisciplinary
Roxana M. M. Stanca, David M. M. Hodgson, Dave J. J. McCarthy, Estelle J. J. Mortimer
Summary: Continental break-up is often accompanied by intracontinental wrenching, leading to the formation of transform margins and transform marginal plateaus. The Falkland Plateau is an example of a transform marginal plateau, where regional wrenching resulted in a mosaic of crustal types in the Falkland Plateau Basin. The uncertainties in crustal boundaries have hindered the development of a reliable plate reconstruction of Southern Gondwana. By integrating seismic reflection, gravity, and magnetic data, an updated crustal architecture of the Falkland Plateau Basin is proposed, providing new insights into the tectonic evolution of the plateau and our understanding of such areas.
Article
Geology
Bonita J. Barrett, Rob L. Gawthorpe, Richard E. Ll Collier, David M. Hodgson, Timothy M. Cullen
DEPOSITIONAL RECORD
(2020)
