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greenschist

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Journal Article
Published: 01 August 2019
American Mineralogist (2019) 104 (8): 1197–1212.
...An-Ping Chen; Jian-Jun Yang; Da-Lai Zhong; Yong-Hong SHI; Jing-Bo Liu Abstract Epidote spherulites are identified in a greenschist facies metavolcanic breccia enclosing a body of coesite-bearing eclogite at Ganghe in the Dabie ultrahigh-pressure metamorphic belt, east-central China. The epidote...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 12 December 2018
Lithosphere (2019) 11 (1): 44–58.
... Ma. Subsequent underplating of the Darrington Phyllite occurred at ∼7 kbar and ∼320 °C prior to ca. 148 Ma until at least ca. 142 Ma. Blueschist-facies conditions and exhumation to ∼5 kbar occurred between ca. 140 and 136 Ma during later accretion and deformation of Shuksan greenschist-blueschist...
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Journal Article
Published: 10 May 2018
Geological Magazine (2019) 156 (6): 1003–1026.
... in eastern Crete (Greece). Based on these data, the Uppermost Unit in the study area can be subdivided (from bottom to top) into the Arvi Unit, Theodorii Greenschist and Asterousia Crystalline Complex (ACC)-type rocks. The ACC-type rocks have been affected by polyphase deformation (D 1 –D 3...
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Journal Article
Published: 07 March 2017
Journal of the Geological Society (2017) 174 (4): 741–758.
... ) and, similarly to this complex ( Zanchetta et al . 2009 ; Zanchi et al . 2009 a ), it broadly consists of a mélange made of tectonic slices of meta-igneous (greenschist and blueschist), metasedimentary (micaschists) and serpentinized ultramafic rocks of various dimensions (kilometres to metres). Tertiary, NW...
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Journal Article
Published: 01 March 2017
South African Journal of Geology (2017) 120 (1): 63–76.
... associated with volcanogenic massive sulfides (VMS). The juvenile subduction-related origin of the Shield rocks and the pervasiveness of shearing and greenschist-to-amphibolite facies metamorphism associated with late Neoproterozoic orogeny are geologic features highly favorable for the development...
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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
Journal: Economic Geology
Published: 01 September 2016
Economic Geology (2016) 111 (6): 1411–1438.
... within syndeformational shear zones ( Castroviejo et al., 2011 ). Archean VMS deposits in the Abitibi subprovince of Canada are affected by regional greenschist metamorphism and polyphase deformation, where proximal hydrothermal alteration mineral assemblages are commonly replaced by metamorphic chlorite...
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Journal Article
Published: 13 May 2016
Canadian Journal of Earth Sciences (2016) 53 (11): 1336–1371.
... 1992 ; Windley and Garde 2009 ; Dziggel et al. 2014 ). Greenschist facies supracrustal rocks occur only in the Târtoq region ( Kisters et al. 2012 ; Szilas et al. 2013 ). After correcting the data for the effects of mass bias fractionation and Hg-interference, a filtering of the data...
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Series: GSA Special Papers
Published: 01 December 2015
DOI: 10.1130/2015.2513(08)
... the Northern Sierra terrane, Calaveras Complex, Feather River ultramafic belt, phyllite-greenschist belt, mélanges, and Foothills terrane. Important changes occur in all belts across the Placerville–Highway 50 corridor, which may separate a major culmination to the south from a structural depression...
Journal Article
Published: 20 November 2015
The Canadian Mineralogist (2015) 53 (3): 379–400.
...Ben J. Cave; Aleksandr S. Stepanov; Dave Craw; Ross R. Large; Jacqueline A. Halpin; Jay Thompson Abstract Detrital rutile is observed in trace amounts in the sub-greenschist facies, graywacke, and argillite lithologies of the Torlesse Terrane-derived Otago Schist, New Zealand. Trace element...
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Journal Article
Published: 01 December 2011
European Journal of Mineralogy (2011) 23 (6): 883–893.
... groups (basalt-dolerite-metadolerite, greenschist-contact metabasite-amphibolite, blueschist, hornfels, “white stone”, ultramafic rocks and intermediate volcanic rocks) could be distinguished. Moreover, different rock types were recognized within each group ( e.g ., greenschist-contact metabasite...
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Journal Article
Published: 01 December 2009
Mineralogical Magazine (2009) 73 (6): 895–913.
... lower greenschist electron-backscatter diffraction deformation-mechanism map P yrite (FeS 2 ) is the most abundant sulphide mineral in the Earth's crust and can be found in a wide range of geologic settings and environments ( Brooker et al ., 1987 ; Mann et al ., 1990 ; Craig and Vokes...
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Journal Article
Published: 01 August 2009
American Mineralogist (2009) 94 (8-9): 1103–1110.
... high P/T blueschist greenschist Crescent Formation The Crescent Formation represents one of the thickest sequences of volcanic rock on Earth; this ~16 km thick stack of basalt is fairly uniform in its composition and primary mineralogy. Such a thick stack of fine-grained homogeneous rock...
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Journal Article
Published: 01 January 2009
European Journal of Mineralogy (2009) 21 (1): 133–148.
...Ioannis Baziotis; Alexander Proyer; Evripidis Mposkos Abstract The Upper Tectonic Unit of the Lavrion area is part of the Attic-Cycladic blueschist belt and was affected by high-pressure, low-temperature metamorphism. Blueschists and greenschists occur in the same outcrop and are believed to have...
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Journal Article
Published: 01 August 2006
The Canadian Mineralogist (2006) 44 (4): 905–927.
.... Although parts of the metamorphic suite reached only greenschist-facies conditions, grade generally increases toward the northeast. Estimates using the computer program twq indicate that garnet–staurolite schist records peak pressure and temperature conditions of 7 kbar at 500°C, whereas some samples...
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Journal Article
Published: 01 February 2005
The Canadian Mineralogist (2005) 43 (1): 89–104.
...Howard W. Day; Robert K. Springer Abstract Jurassic metavolcanic rocks in the western Sierra Nevada, California, display widespread assemblages typical of the transition from the prehnite–pumpellyite to the greenschist facies. Actinolite first appears in the assemblage quartz + albite + chlorite...
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Journal Article
Published: 01 April 2004
The Canadian Mineralogist (2004) 42 (2): 485–497.
... mobilized during both extensive low-temperature alteration of the ultramafic rocks in the greenschist facies and the shearing that affected these deposits. This fact is demonstrated by the occurrence of sudburyite and, more rarely, sperrylite within carbonate in secondary veins and in shear zones...
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Journal Article
Published: 01 March 2004
European Journal of Mineralogy (2004) 16 (2): 285–295.
...Gyorgy SZAKMÁNY; Zsolt KASZTOVSZKY Abstract Metabasic rocks, particularly greenschists, were very popular raw materials for making polished stone tools by prehistoric man in the Carpathian Basin. The major and trace element compositions of these objects are very helpful in determining the place...
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Journal Article
Published: 01 January 2003
Journal of the Geological Society (2003) 160 (1): 71–82.
... through a low- to high-grade greenschist-facies transition within impure, 13 C-rich Palaeoproterozoic dolostones. The least-altered dolostones have δ 13 C of +9‰ and δ 18 O of 22‰. The metamorphic transition is expressed by dolomite + calcite 1 + quartz ± K-feldspar ← tremolite + calcite 2 ± dolomite...
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