Sedimentary facies control on mechanical and fracture stratigraphy in turbidites

Ogata, Kei; Storti, Fabrizio; Balsamo, Fabrizio; Tinterri, Roberto; Bedogni, Enrico; Fetter, Marcos; Gomes, Leonardo; Hatushika, Raphael Siston

doi:10.1130/b31517.1

Cited by 21 publications

(6 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Diagenetic processes can create brittle zones that become preferentially fractured (Giorgioni et al, 2016). Sedimentary fabrics can be laterally anisotropic and produce spatially variable fracture patterns (Ogata et al, 2016). Finally, swarms of joints in the vicinity of magmatic dykes were attributed to tensile stresses related to dyke propagation (Delaney et al, 1986).…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Microfracture spacing distributions and the evolution of fracture patterns in sandstones

Hooker

Laubach

Marrett

2018

Journal of Structural Geology

View full text Add to dashboard Cite

Natural fracture patterns in sandstone were sampled using scanning electron microscope-based cathodoluminescence (SEM-CL) imaging. All fractures are opening-mode and are fully or partially sealed by quartz cement. Most sampled fractures are too small to be height-restricted by sedimentary layers. At very low strains (<~0.001), fracture spatial distributions are indistinguishable from random, whereas at higher strains, fractures are generally statistically clustered. All 12 large (N>100) datasets show spacings that are best fit by log-normal size distributions, compared to exponential, power law, or normal distributions. The clustering of fractures suggests that the locations of natural factures are not determined by a random process. To investigate natural fracture localization, we reconstructed the opening history of a cluster of fractures within the Huizachal Group in northeastern Mexico, using fluid inclusions from synkinematic cements and thermal-history constraints. The largest fracture, which is the only fracture in the cluster visible to the naked eye, among 101 present, opened relatively late in the sequence. This result suggests that the growth of sets of fractures is a self-organized

show abstract

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Microfracture spacing distributions and the evolution of fracture patterns in sandstones

Hooker

Laubach

Marrett

2018

Journal of Structural Geology

View full text Add to dashboard Cite

show abstract

“…Fracture networks in rocks of gently deformed foreland basins and intensively deformed fold-and-thrust belts promote the formation of vertical and/or lateral fluid migration pathways within different hydrostratigraphic units (Travé et al, 2007;Fischer et al, 2009;Evans and Fischer, 2012;Ogata et al, 2014;Muñoz-López et al, 2020a). Many studies have analysed factors controlling the distribution of fracture networks, particularly how the structural position and the characteristics of sedimentary rocks impact the resulting fracture networks (Underwood et al, 2003;Florez-Niño et al, 2005;Lorenz et al, 2006;Wennberg et al, 2006;Ortega et al, 2010;Ogata et al, 2017). Here we use the term 'fracture' in a wide sense to refer to discrete mechanical discontinuities in the rock mass formed under the action of stress, including low-or zero-offset fractures, joints, microfractures and veins (i.e., sealed fractures) (Peacock et al, 2016), and leave out high-offset faults within large fault zones.…”

Section: Introductionmentioning

confidence: 99%

Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)

X¹,

Gomez‐Rivas²,

Alcalde³

et al. 2021

Preprint

View full text Add to dashboard Cite

Sedimentary rocks of foreland fold-and-thrust belts typically undergo intensive fracturing as fold grows. The resulting fracture networks can present significant variations depending on the distribution of sedimentary facies and the complex structural characteristics of fold-and-thrust belts. The Puig-reig anticline, located in the south-eastern Pyrenees, mainly exposes proximal fluvial deposits in the north limb and medial fluvial deposits in the rest of the anticline. Thus, this anticline constitutes an excellent case study to investigate the main controls on the distribution of fracture networks in folded fluvial deposits, in terms of structural position and lithofacies variations. Outcrops were selected to be representative of different structural positions, from the fold hinge to its limbs, and of a variety of the main lithofacies, from proximal to medial fluvial deposits. Fracture data were acquired using the linear scanline method. Results indicate that the anticline is affected by four sets of fractures. The north limb is dominated by thick conglomerate bodies with interlayered sandstones deposited from unconfined flash floods and wide-shallow channel streams in the proximal fluvial fan, and presents large fracture spacing and low fracture intensity but relatively large fracture length and aperture. The crest and the crest-limb transition zones are mainly composed of interlayered conglomerates, sandstones, siltstones and clays, deposited from braided channel streams and overbanks in the medial fluvial fan and present fractures with relatively high fracture intensity and variable fracture length and aperture. The south limb, composed of channel filling sandstone layers and stable overbank fine deposits in the medial fluvial fan, is characterised by low fracture intensity and small fracture length and aperture. Based on multiple linear regression analysis, fracture intensity is mainly controlled by the structural position, bedding thickness and lithological associations, with relatively more intense fracturing in thin sandstone layers with multiple interlayers of fine deposits in the anticline crest. The fracture length is mainly controlled by bedding thickness 2 and is affected lithological associations. The fracture apertures are mainly controlled by lithofacies, with relatively higher apertures affecting conglomerate bodies. The results of this study are relevant for characterising similar systems in the subsurface, where data is scarce.

show abstract

“…Gillespie et al, 1993;Turcotte, 1997;Marrett et al, 2018). As also shown by Olson (2004), subcritical crack growth can result in clustered fracture distributions, which can be described as fracture corridors (sensu Sanderson and Peacock, 2019).…”

Section: Introductionmentioning

confidence: 85%

On a new robust workflow for the statistical and spatial analysis of fracture data collected with scanlines (or the importance of stationarity)

et al. 2020

Self Cite

View full text Add to dashboard Cite

Abstract. We present an innovative workflow for the statistical analysis of fracture data collected along scanlines, composed of two major stages, each one with alternative options. A prerequisite in our analysis is the assessment of stationarity of the dataset, which is motivated by statistical and geological considerations. Calculating statistics on non-stationary data can be statistically meaningless, and moreover the normalization and/or sub-setting approach that we discuss here can greatly improve our understanding of geological deformation processes. Our methodology is based on performing non-parametric statistical tests, which allow detecting important features of the spatial distribution of fractures, and on the analysis of the cumulative spacing function (CSF) and cumulative spacing derivative (CSD), which allows defining the boundaries of stationary domains in an objective way. Once stationarity has been analysed, other statistical methods already known in the literature can be applied. Here we discuss in detail methods aimed at understanding the degree of saturation of fracture systems based on the type of spacing distribution, and we evidence their limits in cases in which they are not supported by a proper spatial statistical analysis.

show abstract

Sedimentary facies control on mechanical and fracture stratigraphy in turbidites

Cited by 21 publications

References 62 publications

Microfracture spacing distributions and the evolution of fracture patterns in sandstones

Microfracture spacing distributions and the evolution of fracture patterns in sandstones

Fracture distribution in a folded fluvial succession: the Puig-reig anticline (South-eastern Pyrenees)

On a new robust workflow for the statistical and spatial analysis of fracture data collected with scanlines (or the importance of stationarity)

Contact Info

Product

Resources

About