RIDGE VIEW: EPR Visualizations

2006 Eruption on the EPR [posted 23Nov2006]
This scene highlights the area on the East Pacific Rise where the 2006 eruption occurred. Background bathymetry from the Ridge Data Management System shows the seafloor topopgraphy between 8° and 10°N latitude. At the northern end of the ridge, centered at 9°50'N, is the EPR ISS bulls-eye. This location was chosen by the Ridge scientific community for the co-location of numerous different experiments. A subset of these experiments are incorporated into this scene. They include: high-resolution bathymetry (V. Ferrini, LDEO/WHOI), hydrothermal vent locations (Ridge Data Management System database), ocean-bottom seismometer locations (M. Tolstoy, LDEO), water column MAPR data (E. Baker, NOAA), and along-axis multichannel seismic lines (G. Kent, SIO). [References: Ferrini et al., 2007; Fornari et al., 2004] (D. Kilb and G. Kent)
ARAD Voxel scene
This scene uses transparency to view the ARAD 3-D reflectivity volume, allowing comparisons between partially transparent seafloor and reflections from the axial magma chamber (AMC) underlying the overlapping spreading center at 9°03'N (OSC). The "voxel" box is constructed by projecting the ARAD reflectivity volume onto the 6 sides of the ARAD box; the view from the top is best and most geometrically correct. To see a geometrically correct view, turn off box's sides (i.e., VoxelBox*.sd) and view only the voxel'ated slices (Slice40*.sd). Best if viewed from top or high-view angles (since voxels have been pressed flat). [References: Kent et al., 2000] (G. Kent)
Moho Under the AMC scene
This scene highlights the presence of Moho reflections beneath the axial magma chamber (AMC) at the 9°03'N overlapping spreading center (OSC). The anomalies in traveltime difference between the AMC and Moho can be used to explore the potential of significant amounts of disseminated melt in the lower crust. Example slices through the ARAD volume highlight the presence of Moho reflections underlying the AMC (see Xline*sd, Inline*.sd). You can view the 3-D distribution of magma chamber reflectivity (through the uses of "flattened" voxels) by turning on SliceWand*.sd. The picked Moho surface can be toggled by turning off and on MohoDepths.sd, and similarity a picked AMC surface Lenses_Melt.sd. The tomographic velocity images at 2.3 and 3.0 km (and converted back into traveltime) are also available; warm colors indicated lower velocities (see chop*-quilt.sd). The -0.35 km/s velocity isosurface can also be toggled (see iso_35_xyzlim.sd). A more regional bathymetric map is also available; toggle newGrid9N.sd. [References: Bazin et al., 2003; Singh et al., 2006] (G. Kent)
Geochemistry: Data collected from the East Pacific Rise
Scene file of various geochemistry measurements taken along the ridge axis of the East Pacific Rise. Values are color-coded to help understand their spatial variability and correlations with the axis locations and vent locations. Data sets include: AL203, CA0, Fe0, K20, Mg0, Mn0, Na20, P205, SI02, and TI02. For reference vent locations and bathemetry is also included.