نتایج جستجو برای: island arc
تعداد نتایج: 91659 فیلتر نتایج به سال:
Submarine volcano 7.10, which is part of the North Iturup group submarine volcanoes Kuril island arc, was studied in 5 voyages research vessel Vulkanolog 1982–1989. Comprehensive studies have shown that edifice 7.10 composed rocks a range from dacites to basalts. The summit and slopes are devoid sediments, base overlain by sedimentary stratum, thickness reaches 800 m. minimum depth recorded abo...
Abstract Arc volcanic rocks erupted above oceanic subduction zones generally have heavy molybdenum (Mo) isotopic compositions, which are attributed to contributions from slab–derived fluids with isotopically Mo at subarc depths. Given that mafic igneous light compositions been rarely identified, it is unclear where isotope reservoirs reside, as these must exist due through geologic time. We pre...
SUMMARY Seismic activity in the Lesser Antilles (LA) is characterized by strong regional variability along arc reflecting complex subduction setting and history. Although routine seismicity monitoring can rely on an increasing number of island stations, island-arc means that high-resolution detailed studies fault structures require a network ocean bottom seismometers (OBS). As part 2016–2017 Vo...
The Kangareh gabbro body is located in south of the Kurdistan Povince and southwest of the Qorveh area. The area belongs to the Sanandaj-Sirjan zone. Tectonic evolutions during Mezozoic and magmatism, due to subduction of the Neo-Tethys oceanic lithosphere beneath the Iran microplate, led to formation of various igneous bodies in this area. Chemical analysis of pyroxene minerals and whole rock ...
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