Blueschist on Île de Groix, FrancePhotomicrograph of a thin section of blueschist facies metamorphosed basalt, from Sivrihisar, Turkey
Blueschist (/ˈbluːʃɪst/), also called glaucophane schist, is a metavolcanic rock[1] that forms by the metamorphism of basalt and rocks with similar composition at high pressures and low temperatures (200–500 °C (392–932 °F)), approximately corresponding to a depth of 15–30 km (9.3–18.6 mi). The blue color of the rock comes from the presence of the predominant minerals glaucophane and lawsonite.
Blueschists are schists typically found within orogenic belts as terranes of lithology in faulted contact with greenschist or rarely eclogite facies rocks.
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Blueschist ( /ˈbluːʃɪst/), also called glaucophane schist, is a metavolcanic rock that forms by the metamorphism of basalt and rocks with similar composition...
than blueschist, which drives further subduction of the slab deep into the Earth's mantle. Metabasalt and blueschist may be preserved in blueschist metamorphic...
pressure metamorphic path through the zeolite, prehnite-pumpellyite, blueschist, and eclogite facies stability zones of subducted oceanic crust. Zeolite...
orthopyroxene + K-feldspar + quartz ± osumilite (at very high temperature) The blueschist facies is at relatively low temperature but high pressure, such as occurs...
The blueschist metamorphic facies gets its name from abundant blue minerals glaucophane and lawsonite. Glaucophane generally forms in blueschist metamorphic...
supercontinents at about 1.9–2.0 Ga. Blueschist is a rock typical for present-day subduction settings. The absence of blueschist older than Neoproterozoic reflects...
Anthracite – Hard, compact variety of coal Amphibolite – Metamorphic rock type Blueschist – Type of metavolcanic rock Cataclasite – Rock found at geological faults...
dioxide3 CO2 Talc can also be formed from magnesium chlorite and quartz in blueschist and eclogite metamorphism by the following metamorphic reaction: chlorite...
the absence of arc volcanism. They are typified by the occurrence of blueschist to eclogite facies metamorphic zones, indicating high-P/low-T metamorphism...
with albite in metamorphic rock of the low-temperature, high-pressure blueschist facies at destructive plate margins. Although it is intermediate in silica...
crust was prone to metamorphose into greenschist instead of blueschist at ordinary blueschist facies. Oceanic crust is continuously being created at mid-ocean...
exposed crystalline basement made of high-pressure subduction rocks such as blueschist and metaquartzite (picture taken at 2,400 metres or 7,900 feet)...
caldera wall between Cape Plaka and Athinios. The metamorphic grade is a blueschist facies, which results from tectonic deformation by the subduction of the...
caused a massive landslide that killed 26 people camping in the area. Blueschist – Type of metavolcanic rock Greenschist – Metamorphic rock List of rock...
Jadeitite is a metamorphic rock found in blueschist-grade metamorphic terranes. It is found in isolated metasomatically altered rock units within serpentinite...
formed under blueschist facies conditions if the original rock (protolith) contains enough magnesium. This explains the scarcity of blueschist preserved...
Typically, continental crust is subducted to lithospheric depths for blueschist to eclogite facies metamorphism, and then exhumed along the same subduction...
the prehnite-pumpellyite facies to the granulite facies, as well as the blueschist facies and eclogite facies at higher pressures and the contact hornfels...
jasper mined in Nevada. Lawsonite is a metamorphic mineral typical of the blueschist facies. It also occurs as a secondary mineral in altered gabbro and diorite...
limestone, serpentinite, and high-pressure, low-temperature metabasites (blueschists and eclogites) and meta-limestones. Fossils like radiolaria are found...
in regionally metamorphosed schists, gneisses, and iron formations; in blueschist facies rocks, and from sodium metasomatism in granulites. It may occur...
under blueschist facies conditions along with other sodic minerals such as albite, jadeite and glaucophane. During the transition from blueschist to greenschist...
sorosilicates include lawsonite, a metamorphic mineral forming in the blueschist facies (subduction zone setting with low temperature and high pressure)...
to very high temperatures. The pressures exceed those of greenschist, blueschist, amphibolite or granulite facies. Eclogites containing lawsonite (a hydrous...
increase in metamorphic grade from trench to arc where highest grade (blueschist to eclogite) is structurally uplifted (in the prisms) compared to the...
The first two are blue fibrous minerals, with glaucophane occurring in blueschists and crocidolite (blue asbestos) in ironstone formations, both resulting...
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