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Major fractures zones of the Atlantic can be seen on this ocean depth map Active Atlantic Ocean fracture zones are perpendicular to the mid-ocean ridges (black lines) in orange shaded region In the Atlantic Ocean most fracture zones originate from the Mid-Atlantic Ridge , which runs from north to south, and are therefore west to east oriented ...
The transform fault of the southern fracture zone displaces the Mid-Atlantic Ridge, coming from the Azores triple junction, to the west over a distance of 120 km (75 mi). At longitude 31.75W a south to north seismically active rift valley with a length of 40 km (25 mi) connects the western end of the southern transform to the eastern end of the ...
The Blanco fracture zone is a fracture zone running between the Juan de Fuca Ridge and the Gorda Ridge. The dominating feature of the fracture zone is the 150 km (93 mi) long Blanco Ridge, which is a high-angle, right-lateral strike slip fault with some component of dip-slip faulting .
Fig-4 shows the Evolutionary diagram of the Chile Ridge Movement. The magmatism of under Taitao Peninsula from about 6 Ma to 5.7–5.1 Ma is shown. CTJ stands for Chile triple junction. A) The ridge is located at the edge of the Chile Trench. the Magma chambers developed and cause the upwelling of the ophiolite onto the surface of the spreading ...
Thin section (crossed polars) of Garnet-Mica-Schist showing a rotated porphyroblast of garnet, mica fish and elongated minerals. This specimen was from close to a shear zone in Norway (the Ose thrust), the garnet in the centre (black) is approximately 2mm in diameter. Very distinctive textures form as a consequence of ductile shear.
Low-degree melting of garnet lherzolite. [1] The flexure of the crust under the weight of the Hawaiian volcanoes forms the Hawaiian Arch, where the crust breaks up and melts can concentrate; this would provide both pathways and sources for magma to ascend to the surface. [26] Magma ascent along fissures associated with the Molokai fracture zone ...
The Mendocino fracture zone is a fracture zone and transform boundary over 4000 km (2500 miles) long, [1] starting off the coast of Cape Mendocino in far northern California. It runs westward from a triple junction with the San Andreas Fault and the Cascadia subduction zone for about 300 km to the southern end of the Gorda Ridge. It continues ...
Approximate surface projection on Atlantic Ocean of Fifteen-Twenty fracture zone (violet). Other nearby fracture zones (orange) and associated features of fracture zones are also shown (lighter orange) as is the Atlantic mid-oceanic ridge (white). Click to expand map to obtain interactive fracture zone details. [7]