MAGNETIC AND TECTONIC REGIONALIZATION ON TEXADA ISLAND, BRITISH COLUMBIA

Geophysics ◽  
1964 ◽  
Vol 29 (4) ◽  
pp. 565-581 ◽  
Author(s):  
D. H. Hall
Keyword(s):  
British Columbia ◽  
Fault Zone ◽  
Coastal Area ◽  
Magnetic Anomalies ◽  
Tectonic Pattern

A significant correlation exists between direction patterns in magnetic and tectonic trends on the northern two thirds of Texada Island, British Columbia, Canada. The patterns were analyzed in further detail by dividing the area into regions based on amplitudes of magnetic anomalies and on patterns in the magnetic trends. A technique involving smoothing and crosscorrelation was applied in the examination of the relationships between the patterns. The regions established on a magnetic basis also are distinct on the basis of tectonic pattern. However, correlation between the magnetic and tectonic patterns varies from region to region within the area. The directions N 50° W, N-S, and E-W, common throughout the coastal area of British Columbia, are the most widespread in the patterns studied on Texada Island. A distinctive zone, identified as a fault zone cutting across the island with a trend of N 20°W stands out in the patterns.

A Miocene submarine volcano at Low Layton, Jamaica

1982 ◽  
Vol 119 (2) ◽  
pp. 193-199 ◽  
Author(s):  
G. Wadge
Keyword(s):  
Fault Zone ◽  
Magnetic Anomalies ◽  
Fault Zones ◽  
Strike Slip ◽  
Fissure Eruption ◽  
Strike Slip Fault ◽  
North Coast ◽  
Alkaline Basalt ◽  
Submarine Volcano ◽  
The North

SummaryA submarine fissure eruption of Upper Miocene age produced a modest volume of alkaline basalt at Low Layton, on the north coast of Jamaica. The eruption occurred in no more than a few hundred metres of water and produced a series of hyaloclastites, pillow breccias and pillow lavas, massive lavas, and dikes with an ENE en échelon structure. The volcano lies on the trend of one of the island's major E–W strike-slip fault zones: the Dunavale Fault Zone. The K–Ar age of the eruption of 9.5 ± 0.5 Ma. B.P. corresponds to an extension of the Mid-Cayman Rise spreading centre inferred from magnetic anomalies and bathymetry of the Cayman Trough to the north and west of Jamaica. The Low Layton eruption was part of the response of the strike-slip fault systems adjacent to this spreading centre during this brief episode of tectonic readjustment.

scholarly journals Estimation of Potential of Iron Sand in The Eastern Coastal Area of Cilacap Regency Based on The Local Magnetic Anomalies Data

2020 ◽  
Vol 1494 ◽  
pp. 012038
Author(s):  
Sehah ◽  
M A Kurniawan ◽  
I Andriyanto ◽  
B Arismawan ◽  
A Risyad ◽  
...  
Keyword(s):  
Coastal Area ◽  
Magnetic Anomalies

Alpine ultramafic rocks of southwestern British Columbia

1982 ◽  
Vol 19 (6) ◽  
pp. 1156-1173 ◽  
Author(s):  
R. L. Wright ◽  
Joe Nagel ◽  
K. C. McTaggart
Keyword(s):  
British Columbia ◽  
Fault Zone ◽  
Fault Zones ◽  
Ultramafic Rocks ◽  
Fraser River ◽  
Major Fault ◽  
Mechanical Injection

Ultramafic rocks of the Hozameen, Bridge River, and Cache Creek ophiolite assemblages show much variety. The Coquihalla belt of the Hozameen ophiolite assemblage, almost completely serpentinized, is elongate, narrow, and lies along a major fault. Three ultramafic bodies from the Bridge River ophiolite differ markedly from each other. (1) The Pioneer peridotite is a relatively small lens (4 km by 2 km), unaltered, well layered, and fault bounded. (2) The Shulaps body, one of the largest in British Columbia, is bounded on the northeast by a major fault and shows a wide mélange zone on the southwest. (3) A serpentinite body at Lillooet appears to be a steeply dipping slab in the Fraser River fault zone. At Cache Creek, serpentinite bodies are small and appear to be fragments in a mélange. Layers, transgressive sheets, and pods in the Pioneer and Shulaps bodies originated in the mantle, probably by one or several processes: metamorphic differentiation, metasomatism, and mechanical injection. Some ultramafic bodies were emplaced onto the crust by obduction but others, strongly serpentinized, that lie in fault zones may have been squeezed into their present positions.

scholarly journals Magnetic Anomalies Related to Active Folds in the North Anatolian Fault Zone.

1991 ◽  
Vol 43 (10) ◽  
pp. 813-823 ◽  
Author(s):  
M. K. TUNÇER ◽  
Y. HONKURA ◽  
N. OSHIMAN ◽  
Y. IKEDA ◽  
A. M. ISIKARA
Keyword(s):  
Fault Zone ◽  
Magnetic Anomalies ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
The North ◽  
Active Folds
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