Contoured patterns of the throw and hade of normal faults in the Coal Measures (Westphalian) of north-east Derbyshire

1984 ◽  
Vol 45 (3) ◽  
pp. 147-161 ◽  
Author(s):  
J. H. RIPPON
Keyword(s):  
Normal Faults ◽  
North East ◽  
Coal Measures

scholarly journals Descriptive text to the Geological map of Greenland, 1:100 000, Kilen 81 Ø.1 Syd

2018 ◽  
pp. 1-29
Author(s):  
Kristian Svennevig ◽  
Peter Alsen ◽  
Pierpaolo Guarnieri ◽  
Jussi Hovikoski ◽  
Bodil Wesenberg Lauridsen ◽  
...  
Keyword(s):  
Hanging Wall ◽  
Field Work ◽  
Normal Faults ◽  
The South ◽  
Thrust Sheet ◽  
Basin Inversion ◽  
North East ◽  
The North ◽  
Geological Map ◽  
Surrounding Areas

The geological map sheet of Kilen in 1:100 000 scale covers the south-eastern part of the Carboniferous– Palaeogene Wandel Sea Basin in eastern North Greenland. The map area is dominated by the Flade Isblink ice cap, which separates several minor isolated landmasses. On the semi-nunatak of Kilen, the map is mainly based on oblique photogrammetry and stratigraphical field work while in Erik S. Henius Land, Nordostrundingen and northern Amdrup Land the map is based on field data collected during previous, 1:500 000 scale regional mapping. Twenty-one Palaeozoic–Mesozoic mappable units were identified on Kilen, while the surrounding areas comprise the Late Cretaceous Nakkehoved Formation to the north-east and the Late Carboniferous Foldedal Formation to the south-west. On Kilen, the description of Jurassic–Cretaceous units follows a recently published lithostratigraphy. The Upper Palaeozoic–lowermost Cretaceous strata comprise seven formations and an informal mélange unit. The overlying Lower–Upper Cretaceous succession comprises the Galadriel Fjeld and Sølverbæk Formations, which are subdivided into six and five units, respectively. In addition, the Quaternary Ymer Formation was mapped on south-east Kilen. The Upper Palaeozoic to Mesozoic strata of Kilen are faulted and folded. Several post-Coniacian NNW–SSE-trending normal faults are identified and found to be passively folded by a later N–S compressional event. A prominent subhorizontal fault, the Central Detachment, separates two thrust sheets, the Kilen Thrust Sheet in the footwall and the Hondal Elv Thrust Sheet in the hanging wall. The style of deformation and the structures found on Kilen are caused by compressional tectonics resulting in post-extensional, presumably Early Eocene, folding and thrusting and basin inversion. The structural history of the surrounding areas and their relation to Kilen await further studies.

Descriptive text to the Geological map of Greenland, 1:100 000, Kilen 81 Ø.1 Syd

2018 ◽  
pp. 1-29
Author(s):  
Kristian Svennevig ◽  
Peter Alsen ◽  
Pierpaolo Guarnieri ◽  
Jussi Hovikoski ◽  
Bodil Wesenberg Lauridsen ◽  
...  
Keyword(s):  
Hanging Wall ◽  
Field Work ◽  
Normal Faults ◽  
The South ◽  
Thrust Sheet ◽  
Basin Inversion ◽  
North East ◽  
The North ◽  
Geological Map ◽  
Surrounding Areas

NOTE: This Map Description was published in a former series of GEUS Bulletin. Please use the original series name when citing this series, for example: Svennevig, K., Alsen, P., Guarnieri, P., Hovikoski, J., Wesenberg Lauridsen, B., Krarup Pedersen, G., Nøhr-Hansen, H., & Sheldon, E. (2018). Descriptive text to the Geological map of Greenland, 1:100 000, Kilen 81 Ø.1 Syd. Geological Survey of Denmark and Greenland Map Series 8, 1-29. https://doi.org/10.34194/geusm.v8.4526 _______________ The geological map sheet of Kilen in 1:100 000 scale covers the south-eastern part of the Carboniferous–Palaeogene Wandel Sea Basin in eastern North Greenland. The map area is dominated by the Flade Isblink ice cap, which separates several minor isolated landmasses. On the semi-nunatak of Kilen, the map is mainly based on oblique photogrammetry and stratigraphical field work while in Erik S. Henius Land, Nordostrundingen and northern Amdrup Land the map is based on field data collected during previous, 1:500 000 scale regional mapping. Twenty-one Palaeozoic–Mesozoic mappable units were identified on Kilen, while the surrounding areas comprise the Late Cretaceous Nakkehoved Formation to the north-east and the Late Carboniferous Foldedal Formation to the south-west. On Kilen, the description of Jurassic–Cretaceous units follows a recently published lithostratigraphy. The Upper Palaeozoic–lowermost Cretaceous strata comprise seven formations and an informal mélange unit. The overlying Lower–Upper Cretaceous succession comprises the Galadriel Fjeld and Sølverbæk Formations, which are subdivided into six and five units, respectively. In addition, the Quaternary Ymer Formation was mapped on south-east Kilen. The Upper Palaeozoic to Mesozoic strata of Kilen are faulted and folded. Several post-Coniacian NNW–SSE-trending normal faults are identified and found to be passively folded by a later N–S compressional event. A prominent subhorizontal fault, the Central Detachment, separates two thrust sheets, the Kilen Thrust Sheet in the footwall and the Hondal Elv Thrust Sheet in the hanging wall. The style of deformation and the structures found on Kilen are caused by compressional tectonics resulting in post-extensional, presumably Early Eocene, folding and thrusting and basin inversion. The structural history of the surrounding areas and their relation to Kilen await further studies.

scholarly journals II.—The Hill of Beath, a Volcanic Neck in Fife

1909 ◽  
Vol 6 (2) ◽  
pp. 56-61
Author(s):  
J. S. Grant Wilson ◽  
H. Brantwood Muff
Keyword(s):  
Intrusive Rock ◽  
Mining Operations ◽  
North East ◽  
The North ◽  
East And West ◽  
The Hill ◽  
Coal Measures ◽  
Carboniferous Limestone

The Hill of Beath, which lies 3 miles to the north-east of Dunfermline, Fife, is an isolated hill with steep, but rounded, contours, and rises fully 250 feet above the surrounding plateau. Whilst the hill itself consists of dark grey tuff, the rocks forming the plateau belong to the Coal-measures of the Carboniferous Limestone series. The latter are thrown into gentle anticlines and synclines, the dip on the limbs of the folds usually lying between 10 and 15 degrees. The outcrop of the tuff has the form of an ellipse, the long axis of which trends east and west and measures nearly 1,000 yards, whilst the breadth of the ellipse is rather more than 500 yards. The distribution of the outcrops of the Carboniferous rocks around the hill and the evidence from the coal workings show that the tuff is not interbedded with the sediments, but that it breaks through them somewhat like an intrusive rock. Sir Archibald Geikie recognized that the Hill of Beath was a volcanic neck, and this view has been confirmed by recent mining operations in a conclusive manner.

A braidplain facies model for the Westphalian B Coal Measures of north-east England

Nature ◽  
1980 ◽  
Vol 284 (5751) ◽  
pp. 51-53 ◽  
Author(s):  
R. S. Haszeldine ◽  
R. Anderton
Keyword(s):  
Facies Model ◽  
North East ◽  
Coal Measures

scholarly journals VI.—On the Fossil Flora of the Staffordshire Coal Fields

1889 ◽  
Vol 35 (1) ◽  
pp. 317-335 ◽  
Author(s):  
Robert Kidston
Keyword(s):  
Small Extent ◽  
Fossil Flora ◽  
Special Importance ◽  
Fossil Plants ◽  
Coal Field ◽  
Considerable Part ◽  
North East ◽  
Extreme North ◽  
Coal Measures ◽  
Coal Fields

On the Fossil Plants collected during the Sinking of the Shaft of the Hamstead Colliery, Great Barr, near Birmingham.The area comprised in the county of Stafford embraces five coal fields—I. The Goldsitch Moss Coal Field, in the extreme north-east of the county.II. The Cheadle and Churnet Valley Coal Field.III. The Wetley and Shafferlong Coal Field.IV. The Coal Field of the Potteries.V. The South Staffordshire Coal Field.The three first mentioned are of small extent, and as I know little of their fossil flora they are omitted from this series of papers on the Carboniferous Flora of the Staffordshire Coal Fields.I, however, devote a separate communication to the fossil plants met with while sinking the shaft of the Hamstead Colliery, Great Barr, as a considerable part of the rocks passed through during this operation is clearly Upper Coal Measures, not Permian, as has been generally stated. The palæontological evidence, therefore, becomes of special importance in determining the age of the red shales occurring in the upper part of this sinking, which have been usually mapped as Permian.

The Avonian of Cannington Park, near Bridgwater, Somerset

1924 ◽  
Vol 61 (5) ◽  
pp. 218-225 ◽  
Author(s):  
F. S. Wallis
Keyword(s):  
North East ◽  
Long Time ◽  
Coal Measures ◽  
The Village ◽  
Final Acceptance ◽  
Interesting Area ◽  
Carboniferous Limestone

This small, though extremely interesting area of Carboniferous Limestone is situated about 4 miles north-east of Bridgwater and ¾ mile north-east of the village of Cannington.For several reasons it has attracted a large number of workers. Fossils are scarce (at first the mass was thought to be unfossiliferous), and hence for a long time the “Devonian or Carboniferous” question of age was a bone of contention. Also, the final acceptance of its Avonian age showed that productive Coal Measures were probably deposited in the area between the Mendips and the Quantock Hills.

scholarly journals Reconnaissance for mineral occurrences in North-East Greenland (76°–78°N)

1994 ◽  
Vol 162 ◽  
pp. 163-168
Author(s):  
S.M Jensen ◽  
H Stendal
Keyword(s):  
Present Knowledge ◽  
Stream Sediment ◽  
Normal Faults ◽  
Fold Belt ◽  
East Greenland ◽  
Geochemical Anomalies ◽  
North East ◽  
Economic Significance ◽  
Incompatible Elements ◽  
Middle Proterozoic

Reconnaissance for indications of potentially economic mineralisation in the Caledonian fold belt of North-East Greenland has shown that stream sediment geochemical anomalies and mineral occurrences are related to Lower-Middle Proterozoic and Caledonian skarns, Caledonian shear and thrust zones, and breccias in post-Jurassic normal faults. None of the mineral showings are of economic significance. Mineralised rock samples, stream sediment silt samples and panned stream sediment heavy mineral concentrates generally have low contents of metals and incompatible elements, and only few areas stand out as being geochronically anomalous. On the basis of the present knowledge of the geology of the region the mineral potential is considered low.

PRE-EOCENE STRATIGRAPHY, STRUCTURE, AND PETROLEUM POTENTIAL OF THE BASS BASIN

1985 ◽  
Vol 25 (1) ◽  
pp. 362 ◽  
Author(s):  
P.E. Williamson ◽  
C.J. Pigram ◽  
J.B. Colwell ◽  
A.S. Scherl ◽  
K.L. Lockwood ◽  
...  
Keyword(s):  
Mineral Resources ◽  
Hydrocarbon Exploration ◽  
Source Rocks ◽  
Seismic Survey ◽  
Normal Faults ◽  
Petroleum Potential ◽  
Northerly Direction ◽  
Potential Reservoir ◽  
Well Data ◽  
Coal Measures

Exploration in the Bass Basin has mainly concentrated on the Eocene part of the Eastern View Coal Measures with the pre-Eocene stratigraphy hardly being tested. Structural mapping using a good quality Bureau of Mineral Resources regional seismic survey and infill industry seismic data, in conjunction with seismic stratigraphy and well data, has generated an understanding of the structure and stratigraphy of the pre- Eocene basin, which suggests that exploration potential exists in structural and stratigraphic leads of both Paleocene and Cretaceous age.The Paleocene structure is influenced by the reactivation of normal faults developed at the time of the mid Cretaceous rift unconformity and reflects drape over deeper features. Consequently fault dependent structural closures often persist from Paleocene to (?)Jurassic levels. Possible stratigraphic traps are also observed against horst blocks and around the basin margins. The longitudinal fault directions are northwest and west northwest with an oblique northerly direction and a prevailing north northeasterly transverse direction.The Paieocene and Upper Cretaceous part of the Eastern View Coal Measures consists of sands, shales and coals deposited in alluvial fans, on flood plains, and in lakes. These are underlain by Early Cretaceous Otway Groups, sands, shales and volcanics. Both intervals have potential reservoir and source rocks and often occur at mature depths. No pre-Otway Group sediments have been encountered in wells in the Bass Basin. However, the Permo- Carboniferous and possibly Triassic strata that occur in Northern Tasmania exhibit reservoir and source rock potential and may extend offshore beneath the Bass Basin.Pre-Eocene structural and stratigraphic studies of the Bass Basin thus point to reservoir and hydrocarbon source potential for possible multiple hydrocarbon exploration targets.

The repeated development of identical joint patterns, north-east Tasmania

1969 ◽  
Vol 106 (4) ◽  
pp. 362-369 ◽  
Author(s):  
Emyr Williams
Keyword(s):  
Igneous Rocks ◽  
Normal Faults ◽  
Late Devonian ◽  
North East ◽  
Fundamental Mechanism

SUMMARYExamination of a contact between Late Devonian intrusive acid igneous rocks and Siluro-Devonian Mathinna hornfels. and the unconformity between these rocks and the overlying Permian beds, has revealed the relative ages of the joints developed. The steep joints of the acid igneous rocks are demonstrably of pre-Permian age although they form a pattern identical to those of the Permian beds, and each joint set is correlated with approximately parallel trending sinuous normal faults. The repeated development of the steep joints is attributed to reactivation of a fundamental mechanism. Some of the joints in the igneous rocks occur between compositional layers which have inherited their shape from the form of the joint-governed contact with the hornfels.

IX,—A Gravity Survey of the Sanquhar Coalfield

1961 ◽  
Vol 68 (2) ◽  
pp. 112-127 ◽  
Author(s):  
Adam C. McLean
Keyword(s):  
Relative Density ◽  
Close Relation ◽  
Gravity Survey ◽  
The South ◽  
North West ◽  
Bouguer Anomalies ◽  
North East ◽  
Local Gravity ◽  
Calculated Effect ◽  
Coal Measures

SynopsisIn the Sanquhar district a bsain of relatively light Upper Carboniferous rocks (relative density 2·54) overlies a denser basement of Ordovician greywackes (relative density 2·72). A gravity survey over the area with coverage of approximately one station per square kilometre, increasing to a station spacing of 100 yards along certain traverses in critical localities, shows a close relation between the Bouguer anomalies and the known geology. A local gravity low over the Carboniferous outcrop is superimposed on a steep regional gradient decreasing south-eastwards. The trend of this gradient is parallel to the strike of the Ordovician rocks, but its exact relationship to the basement structure is not clear. The residual Bouguer anomalies reflect the structure of the Carboniferous rocks; in the south-eastern part of the basin they agree closely with the calculated effect produced by the known thicknesses, structure, and density contrast. Westwards from Kirkconnel, however, there is an increasing discrepancy between the observed and the theoretical anomalies, a discrepancy which indicates the presence of an additional mass of light rock concealed under the known Coal Measures. It is inferred that this material consists of older Carboniferous strata, thickest under the present-day valley of the Nith but concealed by overstep of the overlying Coal Measures against the flanks of the basin. These hidden rocks thin gradually to the south-east across a shallow monocline with north-east trend and south-east of Kirkconnel are truncated by a large fault trending east-north-east. Both the monocline and the fault appear to affect the Westphalian strata to a lesser degree than the base of the Carboniferous rocks.The stratigraphical significance of the concealed strata is that they evince the existence of a pre-Westphalian basin, trending north-west-south-east, which antecedes the later Hercynian fold, and also suggest that pre-Hercynian movements took place along a fault, near Kirkconnel which, trends north-east-south-west across the basin.

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