Neotectonic and seismic activity in the Armorican and Cornubian Massifs: Regional stress field with glacio-isostatic influence?

Vliët-Lanoé, Brigitte van; Bonnet, Stéphane; Hallégouët, Bernard; Laurent, Michel

doi:10.1016/s0264-3707(96)00035-x

Cited by 42 publications

(31 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As previously mentioned (Van Vliet-Lanoë et al 1997a;Brault et al 2001), it seems clear that the more intense deformation features almost always developed above a fault affecting the basement, which fault is frequently outlined by specific grey argillaceous rocks. Few striations were observed on these grey clays.…”

Section: Quaternary Faultingmentioning

confidence: 61%

“…The dominant imbricate fabric of the conglomerate is related to a swash-stacking of cobbles in the form of large, faintly stratified bodies: it attests to a longshore transit towards the NW (N-315E to N-350E), which is similar to the present one. At its base, it includes flat-lying blocks of quartizitic sandstones ( ''Grès Laderes'' ) and vertical frost-jacked cobbles (frost jacking) stacked into the saprolite forming cryogenic pattern ground interpreted as the result of a longshore transportation by anchored ice rafting (Van Vliet-Lanoë et al 1997a. It is also characterized by a variegated petrographic composition common for anchored ice-rafting drift.…”

Section: Sedimentological Data and Stratigraphymentioning

confidence: 99%

“…2c) where they were first interpreted either as pingo scars (Jenkins and Vincent 1981;Rivière and Vernhet 1962) or as more complex features attributed to permafrost by Eisseman (1981) and Strunk (1983). More recently it has been suggested that these ''fold trains'' could be interpreted as induced by seismic shaking (Van Vliet-Lanoë et al 1997a or as Quaternary synsedimentary tectonic folding (Brault et al 2001).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Seismically induced shale diapirism: the Mine d’Or section, Vilaine estuary, Southern Brittany

Vliët-Lanoé¹,

Hibsch²,

Csontos³

et al. 2008

Int J Earth Sci (Geol Rundsch)

Self Cite

View full text Add to dashboard Cite

The Pénestin section (southern Brittany) presents large regular undulations, commonly interpreted as evidence of periglacial pingos. It is an upper Neogene palaeoestuary of the Vilaine River reactivated during the middle Quaternary (middle terrace). It is incised into a thick kaolinitic saprolite and deformed by saprolite diapirs. This paper presents the arguments leading to a mechanistic interpretation of the deformations at Pénestin. Neither recent transpressive tectonics nor diagnostic evidence of periglacial pingo have been found despite evidence for a late paleo-permafrost. The major deformational process is shale diapirism, initially triggered by co-seismic water supply, with further loading and lateral spreading on an already deformed and deeply weathered basement, which allowed the shale diapirism to develop. Deformations are favoured by the liquefaction of the saprolite and a seaward mass movement and recorded, rather distant, effects of an earthquake (c. 280 ka B.P.) resulting from the progressive subsidence of the southern Armorican margin. These deformations triggered by an earthquake are similar to those induced by classical shale diapirism. They are probably common in tectonically active continental environments with shallow water table.

show abstract

Section: Quaternary Faultingmentioning

confidence: 61%

Section: Sedimentological Data and Stratigraphymentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Seismically induced shale diapirism: the Mine d’Or section, Vilaine estuary, Southern Brittany

Vliët-Lanoé¹,

Hibsch²,

Csontos³

et al. 2008

Int J Earth Sci (Geol Rundsch)

Self Cite

View full text Add to dashboard Cite

show abstract

“…transmitted into the interior of the Eurasian plate has been repeatedly proposed by European scientists investigating Britain (e.g. Ziegler et al, 1995;Nikishin et al, 1997;Van Vliet-Lanoë et al, 1997;Cloetingh et al, 2005). Conversely, the 'plumist' idea, that these vertical crustal motions are being caused by interactions between mantle plumes and the continental lithosphere, was developed in the 1990s at Cambridge University (e.g.…”

Section: Discussionmentioning

confidence: 98%

Cenozoic uplift of southwest England

Westaway

2010

J Quaternary Science

View full text Add to dashboard Cite

The uplift history of southwest England is inferred using a composite dataset including marine and fluvial terraces and karstic data. The estimated post-Mid-Pliocene uplift increases eastward from $130 m in west Cornwall and $135 m in south Devon to $150 m in the Hampshire Basin. The post-Early-Pleistocene uplift likewise increases eastward, from $55 m in west Cornwall to $60 m in south Devon and $80 m in Hampshire. Landscape and thermochronological evidence also indicates Eocene uplift, caused by the British Tertiary Igneous Province magmatism; this component tapers eastward from $300 m in west Cornwall to $50 m in south Devon, with subsidence in east Devon. This uplift accompanied magmatic underplating; the mafic layer added to the basal crust thins eastward from $6 km in west Cornwall to $2 km in south Devon, evidently tapering to zero farther east. The laterally variable crustal properties caused by this variation in underplating have affected the post-MidPliocene uplift; the study region is thus intermediate, in terms of crustal strength and landscape evolution, between central-southern England, with no underplating, and Ireland, where $10 km thick underplating has resulted in extreme Late Cenozoic landscape stability. The Eocene mantle-plumerelated uplift is distinct from the post-Mid-Pliocene phase which, the modelling indicates, has been driven by surface processes and, thus, by climate change.

show abstract

“…La littérature fait état de plusieurs séismes survenus durant la période historique (Grellet et al, 1993). Toutefois, ces événements se concentrent essentiellement le long des grandes failles hercyniennes, parfois réactivées, dont le tracé reste assez éloigné de nos secteurs d'étude situés en rade de Brest (Van Vliet-Lanoë et al, 1997).…”

Section: Les Sites D'étudeunclassified

Colmatage sédimentaire des marais maritimes et variations relatives du niveau marin au cours des 6 000 dernières années en rade de Brest (Finistère)

Stéphan¹

2011

norois

View full text Add to dashboard Cite

NoroisEnvironnement, aménagement, société | 2011Géoarchéologie dans l'Ouest de la FranceColmatage sédimentaire des marais maritimes et variations relatives du niveau marin au cours des 6 000 dernières années en rade de Brest (finistère) De nombreuses études des variations relatives du niveau marin à l'Holocène ont été réalisées sur les côtes françaises de l'Atlantique et de la Manche (Fairbridge, 1961 ;

show abstract

Neotectonic and seismic activity in the Armorican and Cornubian Massifs: Regional stress field with glacio-isostatic influence?

Cited by 42 publications

References 30 publications

Seismically induced shale diapirism: the Mine d’Or section, Vilaine estuary, Southern Brittany

Seismically induced shale diapirism: the Mine d’Or section, Vilaine estuary, Southern Brittany

Cenozoic uplift of southwest England

Colmatage sédimentaire des marais maritimes et variations relatives du niveau marin au cours des 6 000 dernières années en rade de Brest (Finistère)

Contact Info

Product

Resources

About