Seismicity of the Atlantis Massif detachment fault, 30°N at the Mid-Atlantic Ridge

Strain Localization Along the Atlantis Bank Oceanic Detachment Fault System, Southwest Indian Ridge

Locating the spreading axis along 80 km of the Mid-Atlantic Ridge south of the Atlantis Transform

The zone of active eruptive fissuring (the “spreading axis”) is investigated at an accretionary segment of the Mid-Atlantic Ridge. High-resolution side-scan images are used to produce a detailed geologic map of the median valley floor of Segment 18, located immediately south of the Atlantis Transform (30oN). The spreading axis is defined by distinguishing between primary eruptive vents (seamoun...

Dominance of one bacterial phylotype at a Mid-Atlantic Ridge

Microbial community structure in natural environments has remained largely unexplored yet is generally considered to be complex. It is shown here that in a Mid-Atlantic Ridge hydrothermal vent habitat, where food webs depend on prokaryotic primary production, the surface microbial community consists largely of only one bacterial phylogenetic type (phylotype) as indicated by the dominance ofa si...

Iodp Expedition 305: Ocean Core Complex Formation, Atlantis Massif Site U1309 Summary

SCIENCE SUMMARY Site U1309 (Prospectus Site AMFW-01A) is located on the central dome of Atlantis Massif, 15 km west of the median valley axis of the Mid-Atlantic Ridge, where the seafloor coincides with a corrugated detachment fault surface. Site U1309 comprises eight holes drilled within 2 km of one another and along a spreading-parallel corridor (see Expedition 304 Site U1309 Site Summary). H...

Feeding Ecology of Coryphaenoides rupestris from the Mid-Atlantic Ridge

The Macrourid fish roundnose grenadier, Coryphaenoides rupestris, is one of the most common benthopelagic fishes on the northern mid-Atlantic Ridge. The ecology of the species is comparatively well studied in continental slope waters of the North Atlantic, but not on the mid-Atlantic Ridge, which is a central mid-ocean area of its distribution. In total, 166 specimens from the RV G.O. Sars crui...