Fault slip envelope: a new parametric investigation tool for fault slip based on geomechanics and 3-D fault geometry

Soliva, Roger; Maerten, Frantz; Maerten, Laurent; Mattila, Jussi

doi:10.5194/se-10-1141-2019

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…We tested the validity of the structural model by comparing the faults response to regional stress with the present-day kinematics and topography through a boundary element method (BEM) numerical model 17 . This technique was performed successfully in other tectonic settings but on a much smaller scale 18 – 20 . This research provides new insights into the structural complexity of the LRB.…”

Section: Introductionmentioning

confidence: 99%

A validated geomechanical model for the strike-slip restraining bend in Lebanon

Fedorik

Maesano

Afifi

2022

Sci Rep

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Most of the methodologies used to validate complex strike-slip structures mainly rely on comparison with other well-known geological features or analogue laboratory models. This study adopts an approach based on the boundary element method at the regional scale to test the structural interpretation of a complex transpressional mountain range. Lebanon restraining bend represents the most prominent topographic transpressional feature along the Dead Sea Transform (DST). It consists of two mountain ranges: the Mount Lebanon and the Anti-Lebanon ranges. We built a 3D geometrical model of the fault surfaces based on previously studied natural examples, structural maps, satellite images, DEM interpretation and experimental analogue models of restraining bend or transpressional structures. Using a boundary element method, we modelled fault deformation response to the regional stress field. The simulation accurately predicts the shape and magnitude of positive and negative topographic changes and fault slip directions throughout the study area. We propose an original approach, which uses implementation of well-known fault geometries, surface and subsurface data, for structural validation in the complex strike-slip domain. Our results, validated by structural evidences, highlight that various structural styles lead to formation of Mt. Lebanon, Anti-Lebanon and Palmyrides structures. Furthermore, this simulation supports the hypothesis that the restraining bend of the DST formed in the widespread crustal weakness zone developed in the Late Jurassic to Early Createceous. We also propose recent Neogene tectonic evolution of the region based on our modelling and integrated with published U/Pb dating of fault zones and tectonostratigraphic evidence.

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Section: Introductionmentioning

confidence: 99%

A validated geomechanical model for the strike-slip restraining bend in Lebanon

Fedorik

Maesano

Afifi

2022

Sci Rep

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“…Reactivation of inherited structures will depend on their more or less favorable orientations with respect to the stress regime (e.g. Sibson, 1985;Soliva et al, 2019;Martín-Gonzalez et al, 2021), especially in foreland, where inherited fault zones weaken an overall strong crust (e.g. Butler et al, 2006;Lescoutre & Manatschal, 2020).…”

Section: Introductionmentioning

confidence: 99%

Structural style of the Languedoc Pyrenean thrust belt in relation with the inherited Mesozoic structures and with the rifting of the Gulf of Lion margin, southern France

Hemelsdaël¹,

Séranne²,

Husson³

et al. 2021

BSGF - Earth Sci. Bull.

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The “Wilson cycle” involves reactivation of rifting structures during convergence-driven inversion, then thrust reactivation during post-orogenic dismantling and extension. Classic documented examples of the Wilson cycle, such as in the pyrenean orogen, are based on sequential sections normal to the orogen. However oblique convergence/divergence that involves strain partitioning, and arcuate segments of the orogen prevent simple tectonic restorations. Languedoc region (southern France) provides a case study of a complex poly-phased deformation involving a range of reactivated structures and cross-cutting relationships, acquired in response to different stress-regimes of varying orientations. We analyse and correlate the onshore-offshore structures of the Languedoc, based on reassessment of existing and newly acquired subsurface data. New results in the previously poorly documented coastal area point to the existence of unrecognized major structures that improves onshore-offshore correlations. Our results show i) the part played by the Mesozoic (early Jurassic, then mid-Cretaceous) extensional phases in the development and the localization of pyrenean-related contractional structures; ii) the control of the later Oligocene rifting of the Gulf of Lion. Restoration of the Pyrenean shortening and Oligocene rifting, constructed along sections of relevant orientation (i.e. close to perpendicular to each other) indicate minimum shortening of 26 km and extension of 14km, respectively, in the Languedoc foreland. Integration of the Pyrenean structural framework of Languedoc reveals a wide, NE-trending transfer zone linking the Iberian Pyrenees to Provence.

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Underground energy-related product storage and sequestration: site characterization, risk analysis and monitoring

Schultz

Williams-Stroud

Horváth

et al. 2023

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This paper presents a high-level overview of site characterization, risk analysis, and monitoring priorities for underground energy-related product storage or sequestration facilities. The siting of an underground energy-related product storage or sequestration facility depends on several important factors beginning with the area of review. Collection of all existing and available records and data from within the rock volume, including potential vulnerabilities such as prior containment issues, proximity to infrastructure and/or population centers, must be evaluated. Baselining of natural processes before storage or sequestration operations begin provides the basis for assessing the effects of storage or sequestration on the surroundings. These initial investigations include geological, geophysical, and geochemical analyses of the suitability of the geological host rock and environs for storage or sequestration. A risk analysis identifies and evaluates threats and hazards, the potential impact should they develop into unwanted circumstances or events, and the consequences to the facility should any of them occur. This forms the basis for framing effective mitigation measures. combines the identified threats (unactualized hazards) and hazards, their potential magnitudes, and the consequences to the facility should any of them occur. This forms the basis for framing effective mitigation measures. Risk analyses produce deterministic and/or probabilistic predictions whose utility depends on the quality of threat, hazard, and consequence characterization. A comprehensive monitoring program that may include downhole well surveillance, observation wells, geochemical sampling, and well testing ensures that the facility operates as designed and that unforeseen issues, such as product migration or loss of integrity, can be identified and mitigated. In addition to these technical issues, human factors and public perception of a project are a critical part of the site characterization, construction, and operational phases of a project. Despite differences between underground storage and sequestration, sets of characterization, risk analysis, and monitoring approaches that were developed for underground natural gas storage or for carbon dioxide sequestration could be used for underground storage or sequestration of any type of energy-related product. Recommendations from this work include: (1) develop an industry-standard evaluation protocol (workflow) for the evaluation of salt beds, aquifers, depleted reservoirs, underground mines and cased wellbores for potential underground storage or sequestration development beyond those in use today; and (2) develop an industry-wide collaborative process whereby incident and near-miss data related to underground storage or sequestration operations can be reported, documented, and shared for use in refining risk analysis modeling.

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Fault slip envelope: a new parametric investigation tool for fault slip based on geomechanics and 3-D fault geometry

Cited by 3 publications

References 52 publications

A validated geomechanical model for the strike-slip restraining bend in Lebanon

A validated geomechanical model for the strike-slip restraining bend in Lebanon

Structural style of the Languedoc Pyrenean thrust belt in relation with the inherited Mesozoic structures and with the rifting of the Gulf of Lion margin, southern France

Underground energy-related product storage and sequestration: site characterization, risk analysis and monitoring

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