Serpentinization and blueschist-facies metamorphism beneath the Mariana forearc
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چکیده
منابع مشابه
Whole-rock Geochemistry and Metamorphism of Blueschist/eclogite-facies Mafic Rocks on Syros, Cyclades, Greece
The island of Syros consists largely of possibly-repeated sequences of glaucophane-bearing calcareous schists, mafic schists, dolomite marbles, and calcite marbles containing abundant aragonite pseudomorphs (Dixon, 1969; Hecht, 1984). Several discrete, fault-bounded packages of blueschist/eclogite-facies mafic rocks with minor serpentinite are also found on the island. Although the mafic rocks ...
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Several varieties of seafloor hydrothermal vents with widely varying fluid compositions and temperatures and vent communities occur in different tectonic settings. The discovery of the Lost City hydrothermal field in the Mid-Atlantic Ridge has stimulated interest in the role of serpentinization of peridotite in generating H(2)- and CH(4)-rich fluids and associated carbonate chimneys, as well as...
متن کاملThematic Article A bathymetric overview of the Mariana forearc
Bathymetric data at a 200-m contour interval for the entire Mariana forearc, from south of 13°N to 25°N, permits the ®rst comprehensive overview of this feature. The Mariana forearc represents a sediment-starved end-member. The forearc in its southern and central sections is divisible into a structurally complex eastern province and a less-deformed western province. Despite the absence of an ac...
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Ophiolitic and accretionary units and associated blueschists of the Cache Creek terrane constitute the most complete evidence of a coherent subduction zone within the Canadian Cordillera. The rocks occupy a central position in the Intermontane Superterrane, a complex of arcs that includes most of the accreted crust in British Columbia (Figure 1). The Cache Creek terrane contains exotic fossil f...
متن کاملEvidence for serpentinization of the forearc mantle wedge along the Nicoya Peninsula, Costa Rica
[1] Characterizing the hydration state of the forearc mantle wedge yields valuable information on frictional stability at the downdip edge of subduction megathrusts. Simultaneous inversion of Pand S-wave arrival times collected as part of the Costa Rica Seismogenic Zone Experiment yields 1D and 3D Pand S-wave velocity models (VP and VS) for the Nicoya Peninsula segment of the Middle America Tre...
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ژورنال
عنوان ژورنال: The Journal of the Geological Society of Japan
سال: 2017
ISSN: 0016-7630,1349-9963
DOI: 10.5575/geosoc.2017.0045