Magnetic Properties of Exposed Oceanic Crust on Macquarie Island

1973 ◽  
Vol 244 (138) ◽  
pp. 115-118 ◽  
Author(s):  
R. F. BUTLER ◽  
S. K. BANERJEE
Keyword(s):  
Magnetic Properties ◽  
Oceanic Crust ◽  
Macquarie Island

A subsided island west of Flores, Azores

1983 ◽  
Vol 20 (5) ◽  
pp. 764-775 ◽  
Author(s):  
Patrick J. C. Ryall ◽  
Marie-Claude Blanchard ◽  
Franco Medioli
Keyword(s):  
Magnetic Properties ◽  
Oceanic Crust ◽  
Water Depth ◽  
Linear Trend ◽  
Subsidence Rate

Investigation of a seamount 50 km west of Flores, in the Azores, has shown it to be a subsided island. This has been established by the fact that some of the cores recovered by a drill from the seamount at 450 m water depth were composed of subaerial basalt. The presence of Globoratalia truncatulinoides in some cores has dated them at less than 1.8 Ma. The basalt has been dated at 4.8 Ma. These facts give a subsidence rate faster than that of normal oceanic crust. The magnetic properties of the basalts have been measured and the results used in an attempt to calculate the anomaly of the seamount using its bathymetry. No calculated anomaly based on our models resembled the observed anomaly. The observed anomaly shows a linear trend typical of normal oceanic crust.

scholarly journals Magnetic properties of oceanic pillow basalts: evidence from Macquarie Island

1976 ◽  
Vol 47 (1) ◽  
pp. 179-196 ◽  
Author(s):  
R. F. Butler ◽  
S. K. Banerjee ◽  
J. H. Stout
Keyword(s):  
Magnetic Properties ◽  
Macquarie Island

Magnetic properties of oceanic pillow basalts from Macquarie Island

Nature ◽  
1975 ◽  
Vol 257 (5524) ◽  
pp. 302-303 ◽  
Author(s):  
ROBERT F. BUTLER ◽  
SUBIR K. BANERJEE ◽  
JAMES H. STOUT
Keyword(s):  
Magnetic Properties ◽  
Macquarie Island
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