Interactions between footwall-, hangingwall-and axial-derived depositional systems make syn-rift stratigraphic architecture difficult to predict, and preservation of neterosional source landscapes is limited. Distinguishing between deposits derived from fault-scarp degradation (consequent systems) and those derived from long-lived catchments beyond the fault block crest (antecedent systems) is also challenging, but important for hydrocarbon reservoir prospecting. We undertake geometric and volumetric analysis of a fault-scarp degradation complex and adjacent hangingwall-fill associated with the Thebe-2 fault block on the Exmouth Plateau, NW Shelf, offshore Australia, using high resolution 3D seismic data. Vertical and headward erosion of the complex and fault throw are measured. Seismic-stratigraphic and seismic facies mapping allow us to constrain the spatial and architectural variability of depositional systems in the hangingwall. Footwall-derived systems interacted with hangingwalland axial-derived systems, through diversion around topography, interfingering or successive onlap. We calculate the volume of footwall-sourced hangingwall fans (V HW) for nine quadrants along the fault block, and compare this to the volume of material eroded from the immediately up-dip fault-scarp (V FW). This analysis highlights areas of sediment bypass (V FW > V HW) and areas fed by sediment sources beyond the degraded fault scarp (V HW > V FW). Exposure of the border fault footwall and adjacent fault terraces produced small catchments located beyond the fault block crest that fed the hangingwall basin. One source persisted throughout the main synrift episode, and its location coincided with: (a) an intra-basin topographic high; (b) a local fault throw minimum; (c) increased vertical and headward erosion within the fault-scarp degradation complex; and (d) sustained clinoform development in the immediate hangingwall. Our novel quantitative volumetric approach to identify through-going sediment input points could be applied to other rift basin-fills. We highlight implications for hydrocarbon exploration and emphasize the need to incorporate interaction of multiple sediment sources and their resultant architecture in tectono-stratigraphic models for rift basins.
Upscaling Carbon Capture and Storage requires identification of suitable storage sites, with robust reservoir seals. The Utsira Formation in the northern North Sea has been flagged as a target for further storage. However, there are no regional studies of seal variability addressing heterogeneities that could facilitate seal bypass. This study aims to: (a) identify, assess and map the elements that promote or restrict fluid migration, (b) develop a matrix to regionally map containment confidence (CC) and (c) rank the different areas for CO 2 containment across the Utsira Formation. The seal and overburden were mapped using a high-resolution, pre-stack depth-migrated
Highlights• There is not a laterally-extensive and homogenous seal above the Utsira Formation.• Regional high-resolution data and modern interpretation approaches illuminate potential seal bypass systems.• A novel containment confidence matrix is used to rank the potential CO 2 storage areas.• The workflow for detailed seal and overburden assessment is highly applicable to other basins. | 1987 EAGE LLOYD et aL. F I G U R E 1 Study area with wells and data extent. (a) Context of the study area in the North Sea and the location of the Sleipner injection site. Satellite imagery from the World Imagery layer of ArcMap online. Bathymetry from EMODnet Bathymetry Consortium (2018). (b) A simplified map showing the main structural elements in the study area (modified from Faerseth et al., 1996). (c) Utsira Fm. thickness map (Eidvin et al., 2013) with seismic dataset extent (yellow box). Dots show wells used in this study, and data from those highlighted in white are presented in this study.Oil and gas fields in the region are also indicated. (d) Regional west-east profile of the Jurassic Rift and overlying stratigraphy split into groups to show main structural elements for reference. Inset shows the studied interval.
Five cases of late-stage abortion in dama gazelle (Gazella dama) occurred in the United Arab Emirates. Histopathologic and molecular diagnostics found the abortions to be associated with Coxiella burnetii infection. Examination of the herd 6 mo later revealed a significant number of serologically positive animals but failed to detect the antigen in genital swabs. There are few reports in the literature of C. burnetii abortion in nondomestic ungulates and no published reports from the United Arab Emirates.
Universal approaches to the prevention and treatment of human diseases fail to take into account profound immune diversity resulting from genetic variations across populations. Personalized or precision medicine takes into account individual lifestyle, environment, and biology (genetics and immune status) and is being adopted in several disease intervention strategies such as cancer and heart disease. However, its application in infectious diseases, particularly global diseases such as tuberculosis (TB), is far more complex and in a state of infancy. Here, we discuss the impact of human genetic variations on immune responses and how they relate to failures seen in current TB diagnostic, therapy, and vaccine approaches across populations. We offer our perspective on the challenges and potential for more refined approaches going forward.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.