Influence of ridge migration and proximity to hot spots on the morphology of slow‐ and intermediate‐spreading centers

  title={Influence of ridge migration and proximity to hot spots on the morphology of slow‐ and intermediate‐spreading centers},
  author={Smiljana {\vS}upak and Suzanne M. Carbotte and Ken C. Macdonald},
Recent observations of ridge bathymetry suggest magmatic segmentation at fast‐ and intermediate‐spreading centers is linked to the migration of the spreading axis over the mantle. At fast‐ and intermediate‐spreading centers, Carbotte et al. (2004) observed that leading segments, those that are offset in the direction of ridge migration, are typically shallower (interpreted to be magmatically robust) relative to trailing segments across first‐ and second‐order discontinuities. The model set… 

Variable crustal structure along the Juan de Fuca Ridge: Influence of on‐axis hot spots and absolute plate motions

Multichannel seismic and bathymetric data from the Juan de Fuca Ridge (JDFR) provide constraints on axial and ridge flank structure for the past 4–8 Ma within three spreading corridors crossing

Distinctive Seafloor Fabric Produced Near Western Versus Eastern Ridge‐Transform Intersections of the Northern Mid‐Atlantic Ridge: Possible Influence of Ridge Migration

Multibeam bathymetry compiled along fracture zones of the northern Atlantic reveals a striking morphological asymmetry. Seafloor fabric produced at western ridge‐transform intersections (RTIs) tends

Magnetic Constraints on Off‐Axis Seamount Volcanism in the Easternmost Segment of the Australian‐Antarctic Ridge

The Australian‐Antarctic Ridge (AAR) is an intermediate‐spreading rate system located between the Southeast Indian Ridge and Macquarie Triple Junction of the Australian‐Antarctic‐Pacific plates. KR1

Volcanism, jump and propagation on the Sheba ridge, eastern Gulf of Aden: segmentation evolution and implications for oceanic accretion processes

The rifting between Arabia and Somalia, which started around 35 Ma, was followed by oceanic accretion from at least 17.6 Ma leading to the formation of the present-day Gulf of Aden. Bathymetric,

Relationships between tectonics and magmatism in a transtensive/transform setting: An example from Faial Island (Azores, Portugal)

The relationships between tectonics and hotspot-related magmatism in transform/transtensive settings are poorly known. The Azores archipelago, lying where the transform plate boundary between the



Three‐dimensional mantle upwelling, melt generation, and melt migration beneath segment slow spreading ridges

In contrast to the along-axis uniformity observed at the East Pacific Rise (EPR), crustal accretion at the Mid-Atlantic Ridge (MAR) appears to be a highly complex and heterogeneous process. Besides

Ridge segmentation and the magnetic structure of the Southern Mid‐Atlantic Ridge 26°S and 31°–35°S: Implications for magmatic processes at slow spreading centers

Along-axis profiles of three-dimensional magnetic inversions for the Mid-Atlantic Ridge (MAR) 31°–35°S show low magnetization near the middle of ridge segments and high magnetization at the segment

Plate-kinematic explanation for mid-oceanic-ridge depth discontinuities

The global mid-ocean-ridge system is characterized by several regional-scale depth and geochemical anomalies. A prominent depth discontinuity between the East Pacific Rise and the Pacific-Antarctic

Variation in cross‐sectional area of the axial ridge along the East Pacific Rise: Evidence for the magmatic budget of a fast spreading center

Along the fast and ultrafast spreading East Pacific Rise, the cross-sectional area of the axial ridge varies significantly over length scales similar to its morphologic segmentation. Using an

Correlated geophysical, geochemical, and volcanological manifestations of plume‐ridge interaction along the Galápagos Spreading Center

As the Galápagos hot spot is approached from the west along the Galápagos Spreading Center there are systematic increases in crustal thickness and in the K/Ti, Nb/Zr, 3He/4He, H2O, and Na2O content

Rift topography linked to magmatism at the intermediate spreading Juan de Fuca Ridge

New seismic observations of crustal structure along the Juan de Fuca Ridge indicate that the axial rift topography reflects magma-induced deformation rather than alternating phases of magmatism and