blueschist facies

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Related to Blueschist: Greenschist

blueschist facies

[′blü‚shist ′fā‚shēz]
(petrology)
High-pressure, low-temperature metamorphism associated with subduction zones which produces a broad mineral association including glaucophane, actinolite, jadeite, aegirine, lawsonite, and pumpellyite.
References in periodicals archive ?
Two of the samples, the glaucophanic metabasalt of the blueschist facies and a metabasalt of the greenschist facies, belong to outcrops within the Neon Basin.
Recent ocean drilling penetration of serpentine diapirs and volcanoes in the Mariana forearc (leading edge of the Eurasian plate, in the Philippine Sea) documents intermixed blocks of mid-ocean ridge basalt and blueschist.
The text discusses the general petrography of mapped lithological units, lithostratigraphy and indications for primary associations in the Cycladic blueschist unit on Syros, and Syros as an example of the structural evolution of the Cycladic Blueschist unit.
2005, Evidence from ophiolites, blueschists, and ultrahigh-pressure metamorphic terranes that the modern episode of subduction tectonics began in Neoproterozoic time: Geology, v.
which consists (Rangin, 1982; Kienast and Rangin, 1982) of either a metamorphosed or unmetamorphosed sedimentary matrix and both Malm and Albian blueschist blocks.
1999): The assemblage stilpnomelane --chlorite--phengitic mica : a geothermobarometer for blueschist and associated greenschist terranes.
Comment on "Redistribution of trace elements during prograde metamorphism from lawsonite blueschist to eclogite facies; implications for deep subduction-zone processes" by C.
1988; Tectonic history of subduction zones inferred from retrograde blueschist P--T paths: Geology, 16, 1081--1084.
Moreno-Sanchez and Pardo-Trujillo (2003) propose naming it as Arquia-Guamote Complex by its similarity with medium- to high-pressure rocks outcropping in Ecuador as in a thin strip of blueschists and eclogites of the Raspas Complex and quartzites and phyllites of the Guamote Division bounded on the east by the Peltec Fault.
Geology and tectonic emplacement of eclogite and blueschists, Biga peninsula, northwest Turkey, Turk.
Pressure-temperature paths and exhumation of Late Ordovician-Early Silurian blueschists and associated metamorphic nappes of the Salinic Brunswick subduction complex, northern Appalachians.
1984) Coesite and pure pyrope in high-grade blueschists of the Western alps: a first record and some consequences.