Post-tectonic clastic dykes in the Dalradian of Scotland and Ireland: implications for delayed lithification and deformation of sediments

Phillips, Clair; Alsop, G. Ian

doi:10.1002/1099-1034(200004/06)35:2<99::aid-gj844>3.0.co;2-x

Cited by 12 publications

(5 citation statements)

References 28 publications

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“…Smyers and Peterson, 1971;Truswell, 1972;Hiscott, 1979;Hillier and Cosgrove, 2002;Hubbard et al, 2007;Cartwright et al, 2008;Monnier et al, 2014), sometimes downward (e.g. Gottis, 1953;Parize, 1988;Huang, 1988;Scholz, 2009Scholz, , 2010, and rarely in all directions (Philips and Alsop, 2000;Surlyk, 2001Surlyk, , 2007Rowe et al, 2002;Ribeiro et Terrinha, 2007). Based on the precise 3D architecture of the sand injectite network, we propose a new model of upward and lateral sand injection in the Vocontian basin consistent with other similar studies of sand injectites (Truswell, 1972;Hiscott, 1979;Levi, 2006;Hubbard et al, 2007;Jackson, 2007;Cartwright et al, 2008;Andresen et al, 2009;V etel and Cartwright, 2009;Kane, 2010).…”

Section: Models Of Sand Injectionmentioning

confidence: 99%

“…(b) Subtrusive injection occurs where rapid infill of unlithified sediments occurs into meter to kilometerescale deep fractures/faults suddenly opened or reeopened (mode I), either in an extensional regime (e.g. Vitanage, 1954;Harms, 1965;Rowe et al, 2002;Wall and Jenkyns, 2004;Ribeiro and Terrinha, 2007;Scholz et al, 2009Scholz et al, , 2010, or a compressional regime (Winslow, 1983;Philips and Alsop, 2000). The material is sucked into the fractures/faults as the opening of the fractures locally leads to underpressuring (Scholz et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Sand injectites network as a marker of the palaeo–stress field, the structural framework and the distance to the sand source: Example in the Vocontian Basin, SE France

Monnier

Gay

Imbert

et al. 2015

Journal of Structural Geology

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Sand injectites network as a marker of the palaeoestress field, the structural framework and the distance to the sand source: Example in the Vocontian Basin, SE France a b s t r a c t A large sand injectite network is very well exposed in the area of Bevons, Southeast France. The associated sandstone turbiditic channelefill and the host marls are the AptianeAlbian rocks of the Vocontian Basin. The sand injection network is composed of dykes, sills and sedimentary laccoliths ranging in thickness from mm to pluriem. The dykes and sills have vertical and horizontal lengths of up to and over 100 m and 1 km, respectively. Outcrop observations show that the architecture and morphology of the sand injectites in the marls is governed by the local stress field during injection, preeexisting faults, the hosterock lithology, compaction, and distance to the potential sand source(s). The main set of dykes is oriented N50e60 perpendicular to the minimum compressive stress s 3 during sand injection. Two other sets of dykes are intruded along preeexisting synesedimentary faults oriented N140e150 (set 2) and N90 (set 3) during the AptoeCenomanian interval. Sills and dykes thin laterally away from their potential sand sources and thin laterally away from them. The vertical thickness variations of the dykes and wings are more complex, as thinning away from the sand sources is often compensated by thickening toward the palaeoesurface. Based on field observations and measurements, we characterized the 3D architecture of the sand injectites and showed that the injectites probably formed due to a forceful injection from an overpressured sand body sealed by lowepermeability lithologies.

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Section: Models Of Sand Injectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sand injectites network as a marker of the palaeo–stress field, the structural framework and the distance to the sand source: Example in the Vocontian Basin, SE France

Monnier

Gay

Imbert

et al. 2015

Journal of Structural Geology

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“…It also has implications for sediment mobility during deformation. This includes the preferential exploitation of pre-existing tectonic fabrics by emplacement of clastic dikes (Dewey andRyan, 1990, Phillips andAlsop, 2000). These results also highlight the importance of demonstrating passive clast/matrix behavior when deriving meaningful finite strain estimates using most Click here to download Figure Figure 3.pdf Click here to download Figure Figure 4.pdf…”

Section: Discussionmentioning

confidence: 84%

Prelithification and synlithification tectonic foliation development in a clastic sedimentary sequence

Meere

Mulchrone

McCarthy

et al. 2016

Geology

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14The current view regarding the timing of regionally developed penetrative 15 tectonic fabrics in sedimentary rocks is that their development postdates lithification of 16 those rocks. In this case, fabric development is achieved by a number of deformation 17 mechanisms including grain rigid body rotation, crystal-plastic deformation and pressure 18 solution. The latter is believed to be the primary mechanism responsible for the domainal 19 structure of cleavage in low-grade metamorphic rocks. In this study we combine field 20 observations with strain studies to characterize considerable (>50%) Acadian crustal 21 shortening in a Devonian clastic sedimentary sequence from southwest Ireland. Despite 22

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“…In clastic rocks with inhibited chemical diagenesis (e.g. Phillips & Alsop, 2000), lithi¢cation can be a slow, protracted process dominated by gradual burial and compaction in which sediments spend a considerable amount of their history in a state in which they are more consolidated than a soil and have become rocks, but are much weaker than a cemented limestone or a zeolite facies low-grade metamorphic sandstone. Fast burial in an overpressure regime can also result in such very slow consolidation.…”

Section: Conceptual Frameworkmentioning

confidence: 99%

Superposed deformation in turbidites and syn‐sedimentary slides of the tectonically active Miocene Waitemata Basin, northern New Zealand

Spörli

Rowland

2007

Basin Research

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The Miocene Waitemata Basin was deposited on a moving base provided by the Northland Allochthon, which was emplaced in the Late Oligocene, as a new convergent plate boundary was established in northern New Zealand. The basin experienced complex interaction between tectonic and gravity‐driven shallow deformation. Spectacular examples of the resulting structures exposed on eastern Whangaparaoa Peninsula 50 km north of Auckland provide a world‐class example of weak rock deformation, the neglected domain between soft‐sediment and hard rock deformation. Quartz‐poor turbidite sequences display a protracted sequence of deformations: D1, synsedimentary slumping; D2, large scale deeper‐seated sliding and extensional low‐angle shearing, associated with generation of boudinage and broken formation; D3, thrusting and folding, indicating transport mostly to the SE; D4, thrusting and folding in the opposite direction; D5, further folding, including sinistral shear; D6, steep faults. The deformation sequence suggests continuous or intermittent southeastward transport of units with increasing sedimentary and structural burial. By phase D3, the rocks had passed from the soft‐sediment state to low levels of consolidation. However, with a compressive strength of ∼5 MPa they are weak rocks even today. Such weak‐rock deformation must be important in other sedimentary basins, especially those associated with active convergent plate boundaries and with immature source areas for their sediments.

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Post-tectonic clastic dykes in the Dalradian of Scotland and Ireland: implications for delayed lithification and deformation of sediments

Cited by 12 publications

References 28 publications

Sand injectites network as a marker of the palaeo–stress field, the structural framework and the distance to the sand source: Example in the Vocontian Basin, SE France

Sand injectites network as a marker of the palaeo–stress field, the structural framework and the distance to the sand source: Example in the Vocontian Basin, SE France

Prelithification and synlithification tectonic foliation development in a clastic sedimentary sequence

Superposed deformation in turbidites and syn‐sedimentary slides of the tectonically active Miocene Waitemata Basin, northern New Zealand

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