1-20 OF 326 RESULTS FOR

Derbyshire Platform

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 February 2012
Petroleum Geoscience (2012) 18 (1): 83–95.
... of the Askrigg Platform of North Yorkshire and a comparison with published data from the age-equivalent Derbyshire Platform. A pattern of consistent, diagenetic modification during early diagenesis is evident, but key differences occur in the burial realm. On both the southern margin of the Askrigg Platform...
FIGURES
First thumbnail for: Burial diagenetic evolution of the Lower Carbonife...
Second thumbnail for: Burial diagenetic evolution of the Lower Carbonife...
Third thumbnail for: Burial diagenetic evolution of the Lower Carbonife...
Journal Article
Published: 13 November 2020
Journal of Sedimentary Research (2020) 90 (9): 1156–1174.
.... The largest of these dolomite bodies (approx. 60 km 2 ) occurs on the Derbyshire Platform, on the southern margin of the Pennine Basin. This study tests the hypothesis that dolomitization occurred at this locality during deposition, platform drowning, and the earliest stages of burial, coincident...
FIGURES
First thumbnail for: Controls on dolomitization in extensional basins: ...
Second thumbnail for: Controls on dolomitization in extensional basins: ...
Third thumbnail for: Controls on dolomitization in extensional basins: ...
Journal Article
Published: 25 July 2017
Proceedings of the Yorkshire Geological Society (2017) 61 (4): 239–257.
...L. S. P. Nolan; L. Angiolini; F. Jadoul; G. Della Porta; S. J. Davies; V. J. Banks; M. H. Stephenson; M. J. Leng Abstract A sedimentological study was conducted at two localities exposing the Mississippian Eyam Limestone Formation of the Derbyshire carbonate platform, UK. Ricklow Quarry comprises...
FIGURES
First thumbnail for: Sedimentary context and palaeoecology of Gigantopr...
Second thumbnail for: Sedimentary context and palaeoecology of Gigantopr...
Third thumbnail for: Sedimentary context and palaeoecology of Gigantopr...
Image
(a) Steeply dipping northern margin of the Derbyshire Platform cemented debrites. (b) The fabric of debrites is best observed on a polished surface. They comprise fragmented, centimetre-scale bioclasts which are cemented by white radiaxial–fibrous cements. The southern margin of the Derbyshire Platform comprises slumped, dolomitized floatstones. (c) and (d) Harborough Rocks.
Published: 28 April 2021
Fig. 5. ( a ) Steeply dipping northern margin of the Derbyshire Platform cemented debrites. ( b ) The fabric of debrites is best observed on a polished surface. They comprise fragmented, centimetre-scale bioclasts which are cemented by white radiaxial–fibrous cements. The southern margin
Image
Conceptual model of dolomitisation on the Derbyshire Platform. A) During the Asbian and Brigantian, seawater convected through the porous and permeable platform margin facies, driven by a high geothermal gradient. B) By the early Serphukovian, the platform had drowned and sills were emplaced. Seawater continued to convect on the platform margin and along faults, with leaching of Mg from interbedded volcanics facilitated by a decrease in pH from mantle-derived CO2. At the same time, groundwater fluxed eastwards under gravity, across the East Midlands Shelf (Walkden and Williams 1991). C) Dolomitization from seawater waned as the platform was buried during the Serphukhovian. Once the platform was buried beneath shales, compactional dewatering and seismically-driven fluid expulsion (Frazer et al. 2014) led to dolomitization along faults (D2), overprinting D1 dolomite.
Published: 13 November 2020
Fig. 11.— Conceptual model of dolomitisation on the Derbyshire Platform. A) During the Asbian and Brigantian, seawater convected through the porous and permeable platform margin facies, driven by a high geothermal gradient. B) By the early Serphukovian, the platform had drowned and sills were
Image
A) Geological map of the Derbyshire Platform. B) Detailed geological map of the Masson Hill area Sample localities and boreholes are identified on the maps. 1, Harborough Rocks; 2, Carsington Pastures; 3, Hopton Tunnel; 4, Brassington Moor Quarry; 5, Ryder Point Quarry; 6, Wapping Mine; 7, Upper Wood; 8, Temple Mine; 9, Coal Pit Rake; 10, Cromford; 11, Masson Hill; 12, High Peak Quarry; 13, Wyns Tor; 14, Grey Tor; 15, Golconda Mine; 16, Devonshire Cavern; 17, Masson Cavern; 18, Gurdall Wensley borehole; 19, Four Lanes End borehole; 20, Bottom Lees Farm borehole; 21, Gratton Dale. C) Cross section of line A–B, as shown in Part A.
Published: 13 November 2020
Fig. 2.— A) Geological map of the Derbyshire Platform. B) Detailed geological map of the Masson Hill area Sample localities and boreholes are identified on the maps. 1, Harborough Rocks; 2, Carsington Pastures; 3, Hopton Tunnel; 4, Brassington Moor Quarry; 5, Ryder Point Quarry; 6, Wapping
Image
Paragenetic sequence for the Derbyshire Platform. Note that calcite cements (Z1–4) were defined by Walkden and Williams (1991), and the paragenesis and intergrowth of Zone 3A–B and 4A–D calcite cements with non-carbonate minerals was defined and described by Hollis and Walkden (2002).
Published: 13 November 2020
Fig. 3.— Paragenetic sequence for the Derbyshire Platform. Note that calcite cements (Z1–4) were defined by Walkden and Williams (1991) , and the paragenesis and intergrowth of Zone 3A–B and 4A–D calcite cements with non-carbonate minerals was defined and described by Hollis and Walkden (2002) .
Image
(a) Section across the northern margin of the Derbyshire Platform (A–B in Fig. 1). The section detail is informed by the seismic profile shown in (b). The Castleton Fault that forms the southern margin of the Edale Basin is not exposed at the surface but is clear in the seismic profile. Dirtlow Rake is a splay of the Castleton Fault. Profile and section are from Andrews (2013).
Published: 12 December 2018
Fig. 2. ( a ) Section across the northern margin of the Derbyshire Platform (A–B in Fig. 1 ). The section detail is informed by the seismic profile shown in ( b ). The Castleton Fault that forms the southern margin of the Edale Basin is not exposed at the surface but is clear in the seismic
Image
Basin evolution model for the Edale Gulf and adjacent Derbyshire Platform. The Visean–Namurian boundary both in the basin and on the platform is indicated. Isotherms are from the estimates of Colman et al. (1989) and Walkden & Williams (1991). The age of the mineralization based on the range of evidence summarized at the bottom of the diagram is early Permian and towards the end of the late Visean uplift. Fluids originating from the shale units of the Bowland–Hodder group in the basin rise rapidly along the Castleton and associated faults to a depth of c. 1 km where mineralization takes place. The repeated rupture of the shale and subsequent faulting may occur as overpressured cells within sediment units pass through the lithostatic pressure gradient curve during uplift.
Published: 12 December 2018
Fig. 9. Basin evolution model for the Edale Gulf and adjacent Derbyshire Platform. The Visean–Namurian boundary both in the basin and on the platform is indicated. Isotherms are from the estimates of Colman et al . (1989) and Walkden & Williams (1991) . The age of the mineralization based
Image
Fracture paragenesis on the Derbyshire Platform in (A) cathodoluminescence and (B) epifluorescence.
Published: 01 February 2012
Fig. 11. Fracture paragenesis on the Derbyshire Platform in ( A ) cathodoluminescence and ( B ) epifluorescence.
Image
Dolomitized Asbian–Brigantian limestone on the Derbyshire Platform: (A) outcrop of dolomitized Asbian Limestone; (B) de-dolomitization (a) and dissolution (b) of replacive dolomite. Field of view 4 mm. (C) Fracture-filling saddle dolomite (a) enveloped by Zone 4A calcite (see Fig. 5). Dashed line marks fracture margin. Field of view 1 mm.
Published: 01 February 2012
Fig. 10. Dolomitized Asbian–Brigantian limestone on the Derbyshire Platform: ( A ) outcrop of dolomitized Asbian Limestone; ( B ) de-dolomitization (a) and dissolution (b) of replacive dolomite. Field of view 4 mm. ( C ) Fracture-filling saddle dolomite (a) enveloped by Zone 4A calcite (see Fig
Image
Summary of geochemical data for Derbyshire Platform (summarized from Hollis & Walkden (1996, 2002) and Hollis (1998)).
Published: 01 February 2012
Fig. 12. Summary of geochemical data for Derbyshire Platform (summarized from Hollis & Walkden (1996 , 2002 ) and Hollis (1998) ).
Image
Summarized paragenesis for the Derbyshire Platform, concentrating on burial calcite cementation (Zones 1-4).
Published: 01 September 2002
Figure 3 Summarized paragenesis for the Derbyshire Platform, concentrating on burial calcite cementation (Zones 1-4).
Journal Article
Published: 01 September 2002
Journal of Sedimentary Research (2002) 72 (5): 700–710.
...Figure 3 Summarized paragenesis for the Derbyshire Platform, concentrating on burial calcite cementation (Zones 1-4). ...
FIGURES
First thumbnail for: Reconstructing Fluid Expulsion and Migration North...
Second thumbnail for: Reconstructing Fluid Expulsion and Migration North...
Third thumbnail for: Reconstructing Fluid Expulsion and Migration North...
Journal Article
Published: 28 April 2021
Journal of the Geological Society (2021) 178 (5): jgs2020-106.
...Fig. 5. ( a ) Steeply dipping northern margin of the Derbyshire Platform cemented debrites. ( b ) The fabric of debrites is best observed on a polished surface. They comprise fragmented, centimetre-scale bioclasts which are cemented by white radiaxial–fibrous cements. The southern margin...
FIGURES
First thumbnail for: Unravelling evidence for global climate change in ...
Second thumbnail for: Unravelling evidence for global climate change in ...
Third thumbnail for: Unravelling evidence for global climate change in ...
Image
Published: 13 November 2020
Table 2.— Summary of the five dolostone phases identified on the Derbyshire platforms and their structural relationships.
Journal Article
Published: 12 December 2018
Journal of the Geological Society (2019) 176 (3): 447–461.
...Fig. 2. ( a ) Section across the northern margin of the Derbyshire Platform (A–B in Fig. 1 ). The section detail is informed by the seismic profile shown in ( b ). The Castleton Fault that forms the southern margin of the Edale Basin is not exposed at the surface but is clear in the seismic...
FIGURES
First thumbnail for: Clumped isotope evidence for episodic, rapid flow ...
Second thumbnail for: Clumped isotope evidence for episodic, rapid flow ...
Third thumbnail for: Clumped isotope evidence for episodic, rapid flow ...
Image
(a) Lateral log of the carbonate mound of the Little Orme, North Wales Platform; (b) lateral log of the carbonate mound of Pin Dale Quarry, Derbyshire Platform; (c) vertical log of the carbonate mound of Pin Dale Quarry, Derbyshire Platform. Note the different scales of each log.
Published: 28 April 2021
Fig. 7. ( a ) Lateral log of the carbonate mound of the Little Orme, North Wales Platform; ( b ) lateral log of the carbonate mound of Pin Dale Quarry, Derbyshire Platform; ( c ) vertical log of the carbonate mound of Pin Dale Quarry, Derbyshire Platform. Note the different scales of each log.
Image
A) Tectono-stratigraphy of the Mississippian of southern Britain, after Fraser and Gawthorpe (2003). BH, Bowland High; BT, Bowland Trough; CLH, Central Lancashire High; DF, Dent Fault; DP, Derbyshire Platform; FHF, Flamborough Head Fault; GT, Gainsborough Trough; HdB, Huddersfield Basin; HB, Humber Basin; LDH, Lake District High; MCF, Morley–Campsall Fault; MH, Manx High; NCF, North Craven Fault; PF, Pennine Fault; SF, Stublick Fault; WG, Widmerpool Gulf. Approximate locations of dolostone bodies on the margins of carbonate platforms are indicated by the red arrows, with the yellow box highlighting the position of the Derbyshire Platform, the focus of this study. B) Stratigraphic framework for the Mississippian of the Derbyshire Platform. Ages derived from Gradstein and Ogg (2004), seismic sequences from Fraser et al. (1990).
Published: 13 November 2020
Fig. 1.— A) Tectono-stratigraphy of the Mississippian of southern Britain, after Fraser and Gawthorpe (2003) . BH, Bowland High; BT, Bowland Trough; CLH, Central Lancashire High; DF, Dent Fault; DP, Derbyshire Platform; FHF, Flamborough Head Fault; GT, Gainsborough Trough; HdB, Huddersfield
Image
(a) Exposure-related facies. (i) Type A, undulating limestone, North Wales Platform; (ii) Type B, nodular limestone, north wales Platform; (iii) red-coloured unconsolidated muds and clays, North Wales Platform; (iv) brown-coloured unconsolidated muds and clays with plant material and quartz clasts, Derbyshire Platform; (v) yellow-coloured unconsolidated muds and clays, North Wales Platform. (b) Igneous facies in core. (i) Contact between extrusive volcanics (weathered basalt) and Bee Low limestone, Derbyshire Platform; (ii) multicoloured volcanic ash from core, Derbyshire Platform. (c) (i) Mudrock overling and draping a Type A mammilated surface, Trefor Rocks, North Wales Platform; (ii) mudrock bed between two limestone beds, with no evidence of emergence, suggesting marine deposition, Trefor Rocks, North Wales Platform; (iii) dark green palaeosol overlying karstic surface beneath the Asbian–Brigantian boundary, Tarmac Hendre Quarry, near Mold. Green-brown weathered limestone is Asbian, grey-weathered limestone is Brigantian.
Published: 28 April 2021
and quartz clasts, Derbyshire Platform; (v) yellow-coloured unconsolidated muds and clays, North Wales Platform. ( b ) Igneous facies in core. (i) Contact between extrusive volcanics (weathered basalt) and Bee Low limestone, Derbyshire Platform; (ii) multicoloured volcanic ash from core, Derbyshire Platform