Determining apparent exhumation from Chalk outcrop samples, Cleveland Basin/East Midlands Shelf

Menpes, Robert J.; Hillis, Richard R.

doi:10.1017/s0016756800024596

Cited by 8 publications

(2 citation statements)

References 21 publications

(46 reference statements)

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“…3). At the end of the Cretaceous and continuing through earlier parts of the Cenozoic, the region underwent tectonic inversion in response to the Alpine orogeny (Kirby and Swallow, 1987; Menpes and Hillis, 1996). This resulted in the uplift and exhumation of pre‐existing bedrock by as much as 2 km and the development of extensive west–east‐trending faults that formed prominent crustal blocks (Fig.…”

Section: Study Areamentioning

confidence: 99%

New geomorphic evidence for a multi‐stage proglacial lake associated with the former British–Irish Ice Sheet in the Vale of Pickering, Yorkshire, UK

Eddey

Bateman

Livingstone

et al. 2022

J Quaternary Science

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Former proglacial lakes provide insight into the temporal and spatial evolution of past ice sheet dynamics and the glaciohydrological systems associated with them. Glacial Lake Pickering was a proglacial lake in North Yorkshire impounded by the British-Irish Ice Sheet. However, geomorphic evidence for its existence and extent is weak and contested. This paper presents, for the first time, systematic mapping of geomorphic features from high-resolution (50 cm to 5 m) digital terrain model data and undertakes palaeogeographical reconstructions to establish Palaeolake Pickering's extent and levels. Results show only weak evidence for a 70-m lake. This and the fact that the present landscape configuration is unable to impound such a large lake suggests that it either did not exist or is much older and that considerable landscape erosion has since taken place. There is good geomorphological evidence to support lake levels between 45 and 20 m. The new palaeogeographical reconstructions show these lake levels were initially controlled by the balance between the North Sea and the Vale of York Lobes of the British-Irish Ice Sheet with lower and later levels impounded by the Filey moraine. A multi-stage Palaeolake Pickering with various extents and levels possibly spanning more than one glacial period has implications for other British-Irish Ice Sheet palaeolake extents reconstructed only from undifferentiated lacustrine sediments and their maximal elevation. The existence of an extensive multi-phase proglacial Palaeolake Pickering along with other similar ones in Eastern England would have impacted mass loss and frontal dynamics via subaqueous melting and iceberg calving, potentially playing a role in controlling the dynamic behaviour of the North Sea Lobe.

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Section: Study Areamentioning

confidence: 99%

New geomorphic evidence for a multi‐stage proglacial lake associated with the former British–Irish Ice Sheet in the Vale of Pickering, Yorkshire, UK

Eddey

Bateman

Livingstone

et al. 2022

J Quaternary Science

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“…The Upper Cretaceous Chalk, however, is relatively insignificant as a productive reservoir within the UK sector. The maximal burial depth of chalk deposits ranges from 0.8 to 1.8 km, depending on the authors [26][27][28]. Structural and petrographic studies in Flamborough Head suggest that chalk experienced several episodes of fracturing related to the tectonic reactivation of basement faults [13,23,29].…”

Section: Geological Settingmentioning

confidence: 99%

Understanding Fluid Flow during Tectonic Reactivation: An Example from the Flamborough Head Chalk Outcrop (UK)

et al. 2018

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Flamborough Head chalks are located at the extremities of E-W and N-S trending fault systems along the Yorkshire coast (UK). Rock deformation is expressed in Selwicks Bay where a normal fault is exposed along with a high density of calcite veins. The fault mineralization is tested using geochemistry. Crosscutting relationships are used to differentiate between three vein generations: a network of parallel veins that are oriented perpendicular to stratigraphy (Group I), hydraulic breccia with typical jigsaw puzzle structure (Group II), and a third generation of calcite veins crosscutting the two previous generations (Group III). Geochemical analyses revealed that all three generations possess the same chemical signature and must reflect successive pulses from the same mineralizing fluid source. Strontium isotope analyses showed that the veins have elevated 87Sr/86Sr ratios, that is, up to 7.110, while ratios of the chalk matrix equal 7.707. The latter value is in agreement with the signature of Late Cretaceous seawater. Consequently, the source of the fluid is external, reflecting an open system. The radiogenic Sr-isotope ratios, combined with low iron concentration, suggest that fluids migrated through sandy deposits. Fluid inclusion salinities range from 0 to 12 eq. wt% NaCl equiv. with a dominance of very low salinity inclusions, reflecting a meteoric signal. This leads to a model where meteoric fluids stored in an underlying confined sandstone aquifer were remobilized. The wide range of salinities could result from mixing of the meteoric fluid with some more saline fluids present in the rock sequence or from the dissolution of salts in the subsurface. In addition to the understanding of the local paragenetic evolution of the veining in Flamborough Head chalks, this study offers an insight into the way how fluid flows and mineralizes along fault zones.

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Stability assessment of a shallow abandoned chalk mine of Malogne (Belgium)

Georgieva

Descamps

Gonze

et al. 2020

European Journal of Environmental and Civil Engineering

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Determining apparent exhumation from Chalk outcrop samples, Cleveland Basin/East Midlands Shelf

Cited by 8 publications

References 21 publications

New geomorphic evidence for a multi‐stage proglacial lake associated with the former British–Irish Ice Sheet in the Vale of Pickering, Yorkshire, UK

New geomorphic evidence for a multi‐stage proglacial lake associated with the former British–Irish Ice Sheet in the Vale of Pickering, Yorkshire, UK

Understanding Fluid Flow during Tectonic Reactivation: An Example from the Flamborough Head Chalk Outcrop (UK)

Stability assessment of a shallow abandoned chalk mine of Malogne (Belgium)

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