Tectonic inheritance at a continental margin

Thomas, William A.

doi:10.1130/1052-5173(2006)016[4:tiaacm]2.0.co;2

Cited by 321 publications

(233 citation statements)

References 35 publications

(40 reference statements)

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“…Both Thomas (2014) and Lefort and Miller (1999) concluded that these faults formed zones of weakness which were subsequently reactivated during rifting in the Mesozoic and Cenozoic with formation of the Atlantic Ocean. The concept was also supported by Thomas (2006) who concluded that these structures were related to transform faults and along with aligned compressional structures show repeated tectonic inheritance through successive Wilson cycles of supercontinent assembly and breakup. Faure et al (2006) and Williams et al (1995) built upon the concept of reactivation during Atlantic Ocean formation, noting that extensional structural features are well recorded along the east coast of Maritime Canada extending up to 400 km into the interior, as noted in Quebec and New England, in the form of widespread west-and northwestoriented extensional paleostress trends.…”

Section: Structural Hydrostratigraphic Unitsupporting

confidence: 48%

Geology and Hydrogeology of Faults on Cape Breton Island, Nova Scotia, Canada: an overview

Baechler¹

2015

atgeol

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Cape Breton Island provides a hydrogeological view into the roots of an ancient mountain range, now exhumed, glaciated, and tectonically inactive. It exhibits deep crustal faults and magma chambers associated with formation of the Appalachian mountain belt and the Maritimes Basin during the Paleozoic, as well as Mesozoic rifting relating to the opening of the Atlantic Ocean. Cenozoic exhumation brought these features near surface and into the active groundwater flow field where they were impacted by glaciation and fluctuating sea level. The faults have been important from a societal viewpoint in development of municipal groundwater supplies, controlling inflows to excavations, hydrocarbon exploration, quarry development, and geotechnical investigations. Conceptual models presented here outline fault control on groundwater flow based on seven case studies. Future research should focus on basin-bounding faults in support of managing their role in aquifer development and protection, mountain-front recharge, controlling large-magnitude springs, groundwater-stream interaction, and channel morphology. The hydrogeological importance of these faults has historically been underappreciated. rÉSUMÉ L'île du Cap Breton procure un aperçu hydrogéologique des racines d'une ancienne chaîne de montagnes, maintenant exhumée, érodée par la glaciation et tectoniquement inactive. Elle présente des chambres magmatiques et des failles crustales profondes associées à la formation de la ceinture montagneuse des Appalaches et du bassin des Maritimes au cours du Paléozoïque, ainsi qu'au rifting du Mésozoïque lié à l' ouverture de l' océan Atlantique. L' exhumation survenue durant le Cénozoïque a rapproché ces particularités de la surface à l'intérieur du champ d' écoulement des eaux souterraines actif, où elles ont été touchées par la glaciation et les fluctuations du niveau de la mer. Les failles se sont avérées importantes sur le plan sociétal pour l' établissement de réserves municipales d'approvisionnement en eau souterraine, le contrôle des infiltrations d' eau dans les excavations, la prospection des gisements d'hydrocarbures, l'aménagement des carrières et les études géotechniques. Les modèles conceptuels présentés illustrent le contrôle par les failles de l' écoulement des eaux souterraines d'après sept études de cas. Les recherches futures devraient porter sur les failles délimitant des bassins aux fins de la gestion de leur rôle dans le développement et la protection des aquifères, l'alimentation du front des secteurs montagneux, le contrôle des sources de forte magnitude, l'interaction entre les eaux souterraines et les cours d' eau et la morphologie des canaux. L'importance hydrogéologique de ces failles a été sousestimée par le passé. [Traduit par la redaction]

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Section: Structural Hydrostratigraphic Unitsupporting

confidence: 48%

Geology and Hydrogeology of Faults on Cape Breton Island, Nova Scotia, Canada: an overview

Baechler¹

2015

atgeol

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“…Klitgord and others (1984) and Thomas (1988Thomas ( , 2006 identified regional northwest-trending transform fault systems intersecting the Florida Platform that extend from the Bahamas into the northeastern Gulf of Mexico. The transform fault systems are related to the opening of the Atlantic Ocean (Klitgord and others, 1984;Thomas 1988Thomas , 2006. The strike-slip fault beneath Biscayne Bay is possibly related to movement along the regional transform fault systems.…”

Section: Tectonic Faultsmentioning

confidence: 99%

Seismic-sequence stratigraphy and geologic structure of the Floridan aquifer system near "Boulder Zone" deep wells in Miami-Dade County, Florida

Cunningham¹

2015

Scientific Investigations Report

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“…The AAP also occurs in a pervasive zone of weak crust and is bounded by the extension of several transform faults (Thomas 2006). Mickus and Keller (1992), using seismic and gravity data, constructed a north-south lithospheric cross section that passes slightly to the west of the AAP.…”

Section: Discussionmentioning

confidence: 99%