Stylolite interfaces and surrounding matrix material: Nature and role of heterogeneities in roughness and microstructural development

Ebner, Marcus; Piazolo, Sandra; Renard, François; Koehn, Daniel

doi:10.1016/j.jsg.2010.06.014

Cited by 61 publications

(46 citation statements)

References 46 publications

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“…A single primitive stylolite texture is observed in the fine-ooid layer which may be described as an initial interface (Ebner et al, 2010). This initial interface is concentrated in porosity and minor phases ( Figure 39, Figure 15b).…”

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 98%

“…Original radial ooid growth creates grain boundaries that are aligned to the centre of the ooid and when these boundaries are aligned to a shear zone, grains undergoing GBS are unlikely to rotate and the CPO/SPO is likely to be preserved. GBS is a highly efficient deformation mechanism where pressure solution is active (Gratier et al, 2013) and localised pressure solution associated with stylolites is known to also affect the surrounding material surrounding the dissolution seam (Ebner et al, 2010).…”

Section: Ooid Deformationmentioning

confidence: 99%

“…Fundamentally, there must be an underlying variation in the material properties prior to D1 that enhances one or more of these processes in the coarse-ooid layer. Stylolites are an example of localised pressure solution that are formed along fluid-filled surfaces when subjected to stress (Ebner et al, 2010). Their formation is influenced by the abundance of dissolution resistant particles in the surrounding rock, such as clays and quartz (Koehn et al, 2007).…”

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

“…Their formation is influenced by the abundance of dissolution resistant particles in the surrounding rock, such as clays and quartz (Koehn et al, 2007). Initial interfaces are early-stage primitive stylolite surfaces that, after progressive dissolution, may form into continuous stylolite seams (Ebner et al, 2010). The development of initial interfaces into mature stylolites appears to require clay minerals along the interface which enhance localised dissolution (Aharonov and Katsman, 2009).…”

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

“…The development of initial interfaces into mature stylolites appears to require clay minerals along the interface which enhance localised dissolution (Aharonov and Katsman, 2009). Minor phases such as clays and quartz are also known to influence the roughness and morphology of stylolite teeth (Ebner et al, 2010) and affect the relative rate of dissolution on each side of the stylolite seam (Koehn et al, 2012).…”

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

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Millimetre-Scale Localisation of Strain and Dissolution in Oolitic Grainstone

Lynch¹

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Millimetre-scale localisation of strain and dissolution in oolitic grainstone ii KeywordsCarbonate, clay dissolution, cement, CPO, ductile, deformation mechanisms, EBSD, grain boundary sliding, geological history, initial interfaces, microfabric, ooid, oolite, porosity, pressure solution, SPO, strain localisation, stylolite, viscosity, XFMMillimetre-scale localisation of strain and dissolution in oolitic grainstone iii AbstractLocalisation of finite strain in rocks is commonly explained by variations in loading conditions, rock mechanical properties and rock fabric. In a geological sequence of layered rocks where loading conditions (such as temperature and far-field stress) are similar, strain variations are commonly constrained to layers with differing material properties. The examined Gudman Oolite presents a unique and interesting example of how variable finite strain is influenced by minor variations in material properties.The Carboniferous Gudman Oolite features alternating millimetre-to centimetre-thick layers of coarse ooids (mean diameter ~1-3mm) and fine ooids (mean diameter ~0.5-1mm) within a sparitic cement (30-300µm grains). Each layer is predominantly (>95%) calcite, formed in the same depositional environment and experienced the same tectonic history. However, the coarse-ooid layers show high non-coaxial deformation and extensive stylolite textures. In contrast, the fine-ooid layers appear nearly undeformed, and are almost devoid of dissolution textures.To shed light on the reasons for this marked localisation of deformation and dissolution, the rock mechanical properties and rock fabric were measured using a combination of X-ray Fluorescence Microscopy (XFM), Electron Backscatter Diffraction (EBSD), X-ray Diffraction (XRD), palaeotemperature analysis and petrographic methods including Scanning Electron Microscopy (SEM), Cathodoluminescence (CL) and transmitted light microscopy. Examination of overprinting relationships in the coarse-ooid layer shows that localised dissolution (D1) occurred prior to localised non-coaxial strain (D2). Primitive stylolite textures suggest that dissolution seams formed in concentric mica-rich layers within ooids which occasionally linked to surrounding ooids to form laterally extensive stylolite seams. I argue that the relatively larger ooids in the coarse-ooid layer contain more extensive micaceous layers which promoted linking and dissolution to form laterally continuous stylolite seams.I conclude that D1 dissolution destroyed the C3 cement framework and reduced the strength of the coarse-ooid layer relative to the largely preserved fine-ooid layer. The later D2 shear deformation event localised strain in the weakened coarse-ooid layer.

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Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 98%

Section: Ooid Deformationmentioning

confidence: 99%

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

Section: Concentrated Stylolite Development In the Coarse-ooid Layersmentioning

confidence: 99%

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Millimetre-Scale Localisation of Strain and Dissolution in Oolitic Grainstone

Lynch¹

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Fingerprinting stress: Stylolite and calcite twinning paleopiezometry revealing the complexity of progressive stress patterns during folding—The case of the Monte Nero anticline in the Apennines, Italy

et al. 2016

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In this study we show for the first time how quantitative stress estimates can be derived by combining calcite twinning and stylolite roughness stress fingerprinting techniques in a fold-and-thrust belt. First, we present a new method that gives access to stress inversion using tectonic stylolites without access to the stylolite surface and compare results with calcite twin inversion. Second, we use our new approach to present a high-resolution deformation and stress history that affected Meso-Cenozoic limestone strata in the Monte Nero Anticline during its late Miocene-Pliocene growth in the Umbria-Marche Arcuate Ridge (northern Apennines, Italy). In this area an extensive stylolite-joint/vein network developed during layer-parallel shortening (LPS), as well as during and after folding. Stress fingerprinting illustrates how stress in the sedimentary strata did build up prior to folding during LPS. The stress regime oscillated between strike slip and compressional during LPS before ultimately becoming strike slip again during late stage fold tightening. Our case study shows that high-resolution stress fingerprinting is possible and that this novel method can be used to unravel temporal relationships that relate to local variations of regional orogenic stresses. Beyond regional implications, this study validates our approach as a new powerful toolbox to high-resolution stress fingerprinting in basins and orogens combining joint and vein analysis with sedimentary and tectonic stylolite and calcite twin inversion techniques.

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