Syndepositional fractures and architecture of the lastoni di formin carbonate platform: Insights from virtual outcrop models and field studies

Inama, Riccardo; Menegoni, Niccolò; Perotti, Cesare

doi:10.1016/j.marpetgeo.2020.104606

Cited by 19 publications

(32 citation statements)

References 53 publications

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“…All images acquired by the UAV or by ground based camera were processed with Agisoft Metashape (version 1.6) following the procedure proposed by Menegoni et al (2019); Inama et al (2020). The workflow included: 1) removal of defective and blurry images (pre-processing), 2) image matching and generation of a sparse point cloud, 3) generation of colorized dense point cloud and 4) generation of topview orthoimage.…”

Section: Fracture Data Acquisitionmentioning

confidence: 99%

Structure and fracture characterization of the Jizan group: Implications for subsurface CO2 basalt mineralization

et al. 2023

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The coastal region of southwest Saudi Arabia contains a thick sequence of Late Oligocene basalts in the Jizan Group, which accumulated along the continental rift that preceded the opening of the Red Sea. These basalts are targeted for the disposal of CO2 emitted from industrial sources by subsurface carbon mineralization processes. The disposal potential of the Jizan Group basalts depends on having adequate permeability along fracture networks capable of conducting injected fluids away from the wellbores. The basalts in the Jizan Group generally lack primary permeability due to hydrothermal alteration, but are cross-cut by a dense network of fractures. In this paper, we describe and interpret the structural geology of the area based on field and geophysical data, and characterize the fracture development in the Jizan Group. The Jizan Group in the area comprises a bimodal suite of 30–21 Ma volcanic and volcaniclastic rocks and lacustrine sediments that accumulated in a continental rift valley similar to the East African rift. It consists predominantly of basaltic lavas that were fed by dense swarms of sheeted basalt dikes intruded parallel to the rift axis. Structurally the area is composed of half grabens bounded from the west by antithetic normal faults, and from the east by a megaflexure. Fractures in the Jizan Group were characterized by ground and aerial digital photogrammetry of outcrops. Mean P21 fracture intensities from 12 scattered meter scale outcrops are in the range 5–54 m−1, which demonstrates that the Jizan Group is highly fractured. Fracture directions are multimodal. The dominant fracture trend is 140–160 N, which is parallel to the sheeted dike swarms and normal faults, and therefore parallel to the paleo-rift axis. Additional conjugate and orthogonal fracture sets are also recognized. The presence of pervasive fracture-based permeability in the Jizan Group will facilitate the injection and mineral carbonation of carbon dioxide in the mafic volcanic rocks in this region.

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Section: Fracture Data Acquisitionmentioning

confidence: 99%

Structure and fracture characterization of the Jizan group: Implications for subsurface CO2 basalt mineralization

et al. 2023

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“…Various studies explain some perspective errors because they focus specifically on outcrops that have flat surfaces. The main steps of the photogrammetry method (Menegoni et al, 2019;Inama, Menegoni & Perotti, 2020), as seen in Figure 4, require (1) data acquisition: collected images, both aerial and land acquisition. Dronedeploy software could provide acquisition aerial photography automatically with GPS onboard position in every shot.…”

Section: Photogrammetrymentioning

confidence: 99%

Carbonate rocks in northern of West Jiwo Hills Bayat: The indication of thrust belt development in southern Central Java

Farisan¹,

Rachman

2022

Ris.Geo.Tam

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Bayat, Klaten, Central Java, is one of three locations in Java with complete types of rocks exposed at the earth’s surface. All those rocks are scattered over a short distance in Bayat, revealing past processes of rock deformation (folding, fracturing, and faulting) and present-day processes of rock weathering and erosion. In this study, we present how clastic carbonate rock of the Oyo Formation at northern Jiwo Hills could be separated about ±15 km northern from its platforms as an indication of thrust fault growth. This study uses aerial photography for photogrammetry (drones) combined with structural geology and microfossil analyses (to know the exact formation) from the outcrop observation. Recent studies have certified that drones are one reliable observation tool in various aspects with better resolution, especially in structural geology studies. Aerial photogrammetry is very well done to see the exact condition of a wide area combined with high resolution on an outcrop scale. The result shows that the carbonate rocks are from Oyo Formation (N9–N11) with the Middle Neritic bathymetric zone. The structural geology phenomenon kinematically indicates the impact of the transpressional movement called flower structure. Based on subsurface interpretation, the authors hypothesize this area was the product of an imbrication thrust stack uplifted basement as the result of the thrust fault rather than horst or paleo-basement high.

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“…This 600 m long and 300 m high cliff (Figure 3) exposes remnants of an exhumed Cassian carbonate platform of the Upper Ladinian to Lower Carnian age, including the transition from platform (Cassian Dolomite Formation) to basinal (San Cassiano Formation) facies [26]. The Cassian Dolomite is a greyish-white fine grained dolostone with sucrose texture that, due to the pervasive dolomitisation of the Cassian platform, preserves few original characteristics of the rock (e.g., original textures, fossils or sedimentary structures; [27]). The San Cassiano Formation comprises alternating marls and limestones with oolitic/bioclastic grainstone [26,27].…”

Section: Locationmentioning

confidence: 99%

“…The Cassian Dolomite is a greyish-white fine grained dolostone with sucrose texture that, due to the pervasive dolomitisation of the Cassian platform, preserves few original characteristics of the rock (e.g., original textures, fossils or sedimentary structures; [27]). The San Cassiano Formation comprises alternating marls and limestones with oolitic/bioclastic grainstone [26,27]. In general, the geometries of the Cassian platform and the San Cassiano Formation (Figure 3) suggest a north-east (NE) progradation of the slope deposits onto the basinal unit [25,28].…”

Section: Locationmentioning

confidence: 99%

Mineralogical Mapping with Accurately Corrected Shortwave Infrared Hyperspectral Data Acquired Obliquely from UAVs

et al. 2021

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While uncrewed aerial vehicles are routinely used as platforms for hyperspectral sensors, their application is mostly confined to nadir imaging orientations. Oblique hyperspectral imaging has been impeded by the absence of robust registration and correction protocols, which are essential to extract accurate information. These corrections are especially important for detecting the typically small spectral features produced by minerals, and for infrared data acquired using pushbroom sensors. The complex movements of unstable platforms (such as UAVs) require rigorous geometric and radiometric corrections, especially in the rugged terrain often encountered for geological applications. In this contribution we propose a novel correction methodology, and associated toolbox, dedicated to the accurate production of hyperspectral data acquired by UAVs, without any restriction concerning view angles or target geometry. We make these codes freely available to the community, and thus hope to trigger an increasing usage of hyperspectral data in Earth sciences, and demonstrate them with the production of, to our knowledge, the first fully corrected oblique SWIR drone-survey. This covers a vertical cliff in the Dolomites (Italy), and allowed us to distinguish distinct calcitic and dolomitic carbonate units, map the qualitative abundance of clay/mica minerals, and thus characterise seismic scale facies architecture.

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Syndepositional fractures and architecture of the lastoni di formin carbonate platform: Insights from virtual outcrop models and field studies

Cited by 19 publications

References 53 publications

Structure and fracture characterization of the Jizan group: Implications for subsurface CO2 basalt mineralization

Structure and fracture characterization of the Jizan group: Implications for subsurface CO2 basalt mineralization

Carbonate rocks in northern of West Jiwo Hills Bayat: The indication of thrust belt development in southern Central Java

Mineralogical Mapping with Accurately Corrected Shortwave Infrared Hyperspectral Data Acquired Obliquely from UAVs

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