Petrology and geochemistry of basalts from the southern Juan de Fuca Ridge: Controls on the spatial and temporal evolution of mid-ocean ridge basalt

1994 ◽  
Vol 99 (B3) ◽  
pp. 4787-4812 ◽  
Author(s):  
Matthew C. Smith ◽  
Michael R. Perfit ◽  
Ian R. Jonasson
Keyword(s):  
Temporal Evolution ◽  
Juan De Fuca Ridge ◽  
Ridge Basalt ◽  
Fuca Ridge ◽  
Mid Ocean Ridge ◽  
Juan De Fuca ◽  
Petrology And Geochemistry ◽  
Ocean Ridge

scholarly journals Recent eruptions on the CoAxial segment of the Juan de Fuca Ridge: Implications for mid-ocean ridge accretion processes

2000 ◽  
Vol 105 (B7) ◽  
pp. 16501-16525 ◽  
Author(s):  
R. W. Embley ◽  
W. W. Chadwick ◽  
M. R. Perfit ◽  
M. C. Smith ◽  
J. R. Delaney
Keyword(s):  
Juan De Fuca Ridge ◽  
Fuca Ridge ◽  
Mid Ocean Ridge ◽  
Juan De Fuca ◽  
Ocean Ridge

scholarly journals Biogenic iron oxyhydroxide formation at mid-ocean ridge hydrothermal vents: Juan de Fuca Ridge

2009 ◽  
Vol 73 (2) ◽  
pp. 388-403 ◽  
Author(s):  
Brandy M. Toner ◽  
Cara M. Santelli ◽  
Matthew A. Marcus ◽  
Richard Wirth ◽  
Clara S. Chan ◽  
...  
Keyword(s):  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Iron Oxyhydroxide ◽  
Fuca Ridge ◽  
Mid Ocean Ridge ◽  
Juan De Fuca ◽  
Ocean Ridge ◽  
Biogenic Iron

Calcium Isotopic Compositions of Normal Mid-Ocean Ridge Basalts From the Southern Juan de Fuca Ridge

2018 ◽  
Vol 123 (2) ◽  
pp. 1303-1313 ◽  
Author(s):  
Hongli Zhu ◽  
Fang Liu ◽  
Xin Li ◽  
Guiqin Wang ◽  
Zhaofeng Zhang ◽  
...  
Keyword(s):  
Juan De Fuca Ridge ◽  
Fuca Ridge ◽  
Isotopic Compositions ◽  
Mid Ocean Ridge ◽  
Juan De Fuca ◽  
Ocean Ridge

Geology of the Northern End of Juan de Fuca Ridge and Sea-Floor Spreading

1974 ◽  
Vol 11 (10) ◽  
pp. 1384-1406 ◽  
Author(s):  
Sandra M. Barr ◽  
R. L. Chase
Keyword(s):  
Magnetic Anomaly ◽  
Fracture Zone ◽  
Juan De Fuca Ridge ◽  
Transform Fault ◽  
Sea Floor ◽  
Fuca Ridge ◽  
Juan De Fuca ◽  
Low Potassium ◽  
Sea Floor Spreading ◽  
Ocean Ridge

The northern end of Juan de Fuca Ridge consists of a series of basement ridges and valleys, inundated with sediment except for the axis of most recent sea-floor spreading. This axis is associated with the western of two branches of the Brunhes magnetic anomaly. The eastern branch of the magnetic anomaly is associated with a largely sediment-covered ridge, apparently produced by spreading early in the Brunhes Epoch. The intervening negative anomaly is probably caused by reversely magnetized rocks older than 0.7 m.y. Basalts dredged from the region of the northern end of Juan de Fuca Ridge have compositions typical of low-potassium ocean ridge basalts. They differ from basalts reported from the southern part of Juan de Fuca Ridge which have higher K2O, TiO2, FeOT, and FeOT/MgO. This difference is compatible with the hypothesis that a mantle plume exists under the southern part of the ridge. Distribution of earthquake epicenters suggests that the Queen Charlotte Fault Zone presently extends south of Explorer Ridge to intersect Juan de Fuca Ridge at 49°N and that the Sovanco Fracture Zone no longer functions as a transform fault.

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