A geomagnetic investigation of volcanic rocks associated with Carboniferous strata at Goblin Combe, near Wrington, Avon

Kearey, P.; Rainsford, Desmond

doi:10.1016/s0016-7878(79)80001-2

Cited by 2 publications

(3 citation statements)

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“…These results contrast with data obtained from Carboniferous volcanic rocks at Goblin Combe (Kearey & Rainsford, 1979), which are of considerably higher amplitude and in places comprise two positive peaks, indicating the presence of two anomalous subsurface bodies.…”

Section: Survey Resultscontrasting

confidence: 99%

“…The magnetic anomalies observed over similar Carboniferous volcanic rocks at Goblin Combe (Kearey & Rainsford, 1979) can be explained in terms of bodies of similar geometry but with magnetization which appears to be either wholly induced, induced with viscous remnant magnetization, or induced with thermoremnant magnetization in which the remnant vector is not greatly different in orientation from the induced vector. There is no evidence of a reversed remnant component.…”

Section: Discussionmentioning

confidence: 96%

“…Modern geophysical techniques can provide a far more efficient means of determining the subsurface extent of such rocks than the trenches and trial holes employed by workers at the turn of the century. Geomagnetic surveys have proved successful in delineating the extent and structure of the igneous rocks at Goblin Combe (Kearey & Rainsford, 1979). The present work applies similar techniques to the study of the igneous rocks at Tickenham.…”

Section: Introductionmentioning

confidence: 99%

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A geomagnetic investigation of Carboniferous igneous rocks at Tickenham, County of Avon

Kearey

Allison

1980

Geol. Mag.

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SummaryA geomagnetic survey indicates that the Carboniferous igneous rocks in the Tickenham area are more extensive than previously recognized. Inversions of the magnetic anomalies suggest the causative basaltic body is tabular in form, conforms to the regional dip and has a coplanar magnetization. The magnetization vector orientation indicates emplacement during a period of magnetic field reversal and thus at a time different from other Carboniferous igneous rocks in the region.

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Section: Survey Resultscontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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A geomagnetic investigation of Carboniferous igneous rocks at Tickenham, County of Avon

Kearey

Allison

1980

Geol. Mag.

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Deep structure of the East Mendip Hills from gravity, aeromagnetic and seismic reflection data

Ateş

Kearey

1993

JGS

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Beacon Hill pericline is the most easterly pericline of the Mendip Hills, whose folds and thrusts were formed during the Variscan Orogeny by earth movements directed from the south. The Silurian volcanic rocks making up the core of the pericline are shown to be responsible for the large, linear magnetic anomalies present over eastern Mendip. Magnetic anomalies within the Radstock Coalfield to the north, however, are related to volcanic horizons in the Carboniferous Limestone. A three-dimensional model shows the presence of Silurian rocks beneath the spine of the eastern Mendip Hills. Seismic reflection sections are used to control two-dimensional interpretations of potential field data from Beacon Hill pericline. Although the magnetic anomalies are adequately explained by the seismic model, the gravity anomalies require the presence of an additional low density body beneath the pericline's southern flank. This body is interpreted as a thrust wedge of Old Red Sandstone emplaced in its present position by a previously unrecognized post-Variscan normal fault. The considerable lateral extent of the structure is demonstrated by the trend of the maxima of the horizontal gradient of the gravity anomalies.

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A geomagnetic investigation of volcanic rocks associated with Carboniferous strata at Goblin Combe, near Wrington, Avon

Cited by 2 publications

References 3 publications

A geomagnetic investigation of Carboniferous igneous rocks at Tickenham, County of Avon

A geomagnetic investigation of Carboniferous igneous rocks at Tickenham, County of Avon

Deep structure of the East Mendip Hills from gravity, aeromagnetic and seismic reflection data

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