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blueschist

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Journal Article
Published: 20 February 2020
Environmental and Engineering Geoscience (2020) 26 (1): 29–33.
... of cubic yards of earth. Much of the material was composed of serpentinite, blueschist, and other rocks that contain chrysotile and a variety of amphibole minerals, including glaucophane, winchite, actinolite, tremolite, and other asbestos-related amphiboles. This article explores the unique...
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Series: Geological Society, London, Special Publications
Published: 08 October 2019
DOI: 10.1144/SP483.13
EISBN: 9781786204523
... Abstract Himalayan high-pressure metamorphic rocks are restricted to three environments: the suture zone; close to the suture zone; and (mostly) far (>100 km) from the suture zone. In the NW Himalaya and South Tibet, Cretaceous-age blueschists (glaucophane-, lawsonite- or carpholite-bearing...
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Journal Article
Published: 01 August 2019
American Mineralogist (2019) 104 (8): 1065–1082.
... of cold collision and deep slab breakoff, whereas rare occurrences of low T/P metamorphism in the Paleoproterozoic may reveal atypical localized regions of cold collision. Low T/P metamorphism is not known from the Archean geological record, but the absence of blueschists in particular is unlikely...
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Journal Article
Published: 01 May 2019
American Mineralogist (2019) 104 (5): 724–743.
...Yu Wang; Dejan Prelević; Stephen F. Foley Abstract The petrology, mineralogy, and geochemistry of lawsonite blueschists from the Tavşanlı zone in northwest Turkey—one of the best-preserved blueschist terranes in the world—have been comprehensively investigated. The blueschist samples contain...
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Journal Article
Published: 10 January 2019
Journal of the Geological Society (2019) 176 (3): 492–504.
... of various rock types that are now closely associated within allochthonous units representing the Devonian–Carboniferous subduction–accretionary complex. Mafic blueschists of the middle unit yielded a Lu–Hf garnet age of 363.9 ± 1.3 Ma. The blueschists occur within high-pressure, garnet-free phyllites...
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Journal Article
Journal: Geology
Published: 01 January 2019
Geology (2019) 47 (1): e453.
Series: Geological Society, London, Special Publications
Published: 01 January 2019
DOI: 10.1144/SP474.12
EISBN: 9781786204202
... ). The largest coesite grain found so far in Chinese western Tianshan is c. 100 µm long, 50 µm wide and enveloped by a narrow quartz rim in porphyroblastic garnet in albite-poor mica schists ( Fig. 3d , Yang et al. 2013 ). Geochemical studies show that the protoliths of eclogites and blueschists...
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Series: Geological Society, London, Special Publications
Published: 01 January 2019
DOI: 10.1144/SP474.3
EISBN: 9781786204202
... heterogeneous, varying from jadeitite sensu stricto to rocks containing jadeite, lawsonite and quartz in varying proportions. The quartz-bearing suite has also been observed to form concordant layers and discordant veins in blueschist, a very rare feature worldwide. Draper & Nagle (1991) already noted...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 12 December 2018
Lithosphere (2019) 11 (1): 44–58.
...Jeremy L. Cordova; Sean R. Mulcahy; Elizabeth R. Schermer; Laura E. Webb Abstract The Easton metamorphic suite, in the northwest Cascades of Washington State, preserves an inverted metamorphic sequence with ultramafic rocks underlain by amphibolite and high-temperature blueschist juxtaposed above...
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Journal Article
Journal: Geology
Published: 08 August 2018
Geology (2018) 46 (9): 815–818.
...Carl Spandler; Johannes Hammerli; Cassian Pirard Abstract Neodymium isotope geochemistry is pivotal to understanding magma genesis and crustal recycling processes at convergent plate margins. Here, we present Nd isotope compositions of rare earth element (REE)–rich minerals from blueschist...
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Journal Article
Published: 01 February 2018
American Mineralogist (2018) 103 (2): 181–196.
... globally during the late Mesoarchean. During the Neoproterozoic there was a change to deep subduction and colder thermal gradients, features characteristic of the modern plate tectonic regime. Clasts of metamorphosed mafic rock with incipient blueschist facies mineral assemblages associated...
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Journal Article
Journal: Geosphere
Published: 10 January 2018
Geosphere (2019) 15 (1): 24–46.
... 23 10 2018 © The Authors 2019 Gold Open Access: This paper is published under the terms of the CC-BY-NC license. Ten samples of metamafic rocks (four eclogite, five blueschist, one chlorite + epidote–rich pod margin) and three samples of quartz-rich metasedimentary rocks collected...
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Journal Article
Published: 26 June 2017
European Journal of Mineralogy (2017) 29 (6): 959–970.
... of blueschists and high- P amphibolites found as isolated blocks in the metasediments of the Chilean Coastal Cordillera. As noted above, metamorphic olivine is commonly colourless but, in contact with the humite minerals, it turns to yellow and pleochroic, similar to the olivine intergrowths with humite...
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Journal Article
Published: 03 April 2017
Geological Magazine (2018) 155 (2): 316–334.
..., mineral chemistry and thermodynamic modelling reveal that the mafic schists followed contrasting P–T paths during their tectonometamorphic evolutions. In the schists of the Chah Gorbeh and Ophiolitic complexes an early greenschist-facies stage was later overprinted by blueschist-facies phase assemblages...
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Journal Article
Published: 07 March 2017
Journal of the Geological Society (2017) 174 (4): 741–758.
... of the Palaeo-Tethyan oceanic realm, with peak metamorphism equilibrated under blueschist- to eclogite-facies metamorphic conditions. Implications of these data for the palaeotectonic reconstruction during closure of the Palaeo-Tethyan ocean and the terminal collisional assembly along the southern margin...
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Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (6): 1029–1046.
...Eitaro Sato; Takao Hirajima; Kenta Yoshida; Kenichiro Kamimura; Yoshikazu Fujimoto Abstract This study investigated progressive changes in the mineral assemblage of a Palaeozoic lawsonite-blueschist (LBS) unit of the Kurosegawa belt, Kyushu, Japan. The LBS unit is mainly composed of intercalated...
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Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (6): 1059–1078.
... of a Cretaceous accretionary prism. The metabasic rocks occur as blueschists and greenschists, whereas the metasedimentary rocks are former greywackes s.l ., or psammopelites, and can now be characterized as phyllites. Eight characteristic mineral assemblages can be defined within the metabasic sample suite...
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Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (6): 1047–1057.
...Jarosław Majka; Stanisław Mazur; Karolina Kośmińska; Krzysztof Dudek; Iwona Klonowska Abstract The blueschist occurrence at the Kopina Mt. is situated at the eastern margin of the Karkonosze–Izera Massif in the West Sudetes of the northern Bohemian Massif. Metabasic rocks with continental crust...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 August 2016
Lithosphere (2016) 8 (4): 386–395.
...Qiong-Yan Yang; M. Santosh; S. Maruyama; M. Nakagawa Abstract Blueschist facies rocks in the Shikoku island of southwest Japan were extruded from depth as blocks in the Kurosegawa serpentinite mélange, where they occur in association with other tectonic blocks of tonalite-trondhjemite-granodiorite...
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Series: GSA Special Papers
Published: 01 December 2015
DOI: 10.1130/2015.2513(08)
... ultramafic belt is an imbricate zone of slices of ultra-mafic rocks, Paleozoic amphibolite, and Triassic–Jurassic blueschist, with blueschist interleaved structurally between east-dipping serpentinite units. The Downieville fault and Feather River ultramafic belt are viewed as elements of a Triassic–Jurassic...