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suprasubduction zones

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Journal Article
Journal: GSA Bulletin
Published: 01 September 2010
GSA Bulletin (2010) 122 (9-10): 1548-1568.
...John Wakabayashi; Arundhuti Ghatak; Asish R. Basu Abstract Ophiolites are on-land remnants of oceanic lithosphere, and most of the more extensive ophiolites apparently formed above a subduction zone, a tectonic setting known as a suprasubduction-zone setting. Thin sheets of high-grade metamorphic...
FIGURES | View All (11)
Series: GSA Special Papers
Published: 01 July 2008
DOI: 10.1130/2008.2438(07)
... Suprasubduction-zone ophiolites have been recognized in the geologic record for over thirty years. These ophiolites are essentially intact structurally and stratigraphically, show evidence for synmagmatic extension, and contain lavas with geochemical characteristics of arc-volcanic rocks...
Series: GSA Special Papers
Published: 21 December 2017
DOI: 10.1130/2016.2525(07)
EISBN: 9780813795256
... and suprasubduction zone (SSZ) fields ( Dilek and Furnes, 2011 ); (E) Th/Yb vs. Ta/Yb diagram ( Pearce, 1982 ) showing the mantle array, oceanic-island basalt (OIB), and MORB fields ( Green, 2006 ); (F) chondrite-normalized ( Sun and McDonough, 1989 ) (La/Sm) N vs. Nb/Yb diagram ( Tian et al., 2011 , and references...
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Journal Article
Published: 01 July 2011
Journal of the Geological Society (2011) 168 (4): 1031-1045.
... and harzburgite, hosting dunite and chromitite pods. The low Cr-number (0.2–0.4), Cr-number–TiO 2 relation of the chromites, oxygen fugacity ( f O 2 ) values ( Δ log f O 2 (FMQ) = −1.90) and trace elements of mantle peridotites indicate a mid-ocean ridge basalt–suprasubduction-zone (MORB–SSZ) setting. The MORB...
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Journal Article
Journal: Geology
Published: 01 January 2007
Geology (2007) 35 (1): 53-56.
...Sonia Sánchez Martínez; Ricardo Arenas; Florentino Díaz García; José Ramón Martínez Catalán; Juan Gómez-Barreiro; Julian A. Pearce Abstract The Careón ophiolite (Galicia, NW Iberian Massif) shows lithological and geochemical features suggestive of an origin in a suprasubduction zone...
FIGURES
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2431(09)
... of the mature Talkeetna arc. In this scenario, the Kenai ultramafic massifs would be correlative with the McHugh Complex, not the Talkeetna arc. A third hypothesis is that the Border Ranges Ultramafic-Mafic Complex may represent forearc or suprasubduction zone ophiolites formed seaward of the Talkeetna arc...
Journal Article
Journal: GSA Bulletin
Published: 01 August 1999
GSA Bulletin (1999) 111 (8): 1217-1232.
... of a suprasubduction-zone basaltic arc during tectonic accretion to the western margin of North America or a nearby offshore arc. The following history is advanced. Light rare earth element (REE) enriched arc tholeiites and alkaline basalts and distal turbidites of the North Fork and Eastern Hayfork terranes were...
Journal Article
Journal: Geology
Published: 01 May 2008
Geology (2008) 36 (5): 431-432.
... multiple stages and sources of melt evolution and life cycles in suprasubduction zone (SSZ) environments ( Shervais, 2001 ; Dilek and Flower, 2003 ). Some of the most extensively studied Tethyan ophiolites appear to have developed, for example, in arc-forearc settings within restricted marginal basins...
FIGURES
Journal Article
Journal: GSA Bulletin
Published: 01 May 1998
GSA Bulletin (1998) 110 (5): 553-571.
... basalts appear to be island-arc tholeiites that have limited boninitic affinities—i.e., products of suprasubduction zone magmatism. Basalts from the Black Mountain Coast Range ophiolite remnant near St. Helena are TiO 2 -rich relative to those from most other Coast Range ophiolite fragments, and TiO 2...
Image
Lava and dike rocks from <b>suprasubduction</b>-<b>zone</b> (SSZ) ophiolite types (backar...
Published: 01 July 2012
Figure 8. Lava and dike rocks from suprasubduction-zone (SSZ) ophiolite types (backarc-forearc [BA-FA], forearc [FA], continental backarc [CBA], and oceanic backarc [OBA] represented by the Solund-Stavfjord ophiolite complex [SSOC]), plotted in various discrimination diagrams. (A) Ti-V plot
Image
Field photos from continental margin and various <b>suprasubduction</b>-<b>zone</b> ophio...
Published: 01 March 2011
Figure 8. Field photos from continental margin and various suprasubduction-zone ophiolites, depicting their internal structure and the crosscutting relationships of different ophiolitic subunits. (A) Lherzolitic peridotites of the Jurassic In-Zecca ophiolite (continental margin type
Image
Field photos from continental margin and various <b>suprasubduction</b>-<b>zone</b> ophio...
Published: 01 March 2011
Figure 8. Field photos from continental margin and various suprasubduction-zone ophiolites, depicting their internal structure and the crosscutting relationships of different ophiolitic subunits. (A) Lherzolitic peridotites of the Jurassic In-Zecca ophiolite (continental margin type
Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2007.2431(10)
...) and Nokleberg et al. (1994) . The geochemical characteristics of the Tlikakila complex transitional between arc and MORB are typical of suprasubduction-zone ophiolites, though several samples have very MORB-like compositions. A second north-dipping subduction zone lying between the Wrangellia...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2006
GSA Bulletin (2006) 118 (7-8): 771-784.
... in SiO 2 and FeO T compared to modern abyssal peridotites. These geochemical signatures are consistent with a suprasubduction zone geodynamic setting. Metasomatism of the subarc mantle by slab-derived hydrous melts and/or fluids at ca. 2.55 Ga is likely to have been the cause of the subduction zone...
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Journal Article
Published: 01 August 2004
Mineralogical Magazine (2004) 68 (4): 699-708.
...R. A. Coish; P. Gardner Abstract Mineral compositions of small peridotite bodies in an Ordovician collision zone of the Vermont Appalachians provide important clues to their tectonic environment of origin. The bodies have been deformed and partially serpentinized under greenschist- to lower...
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Journal Article
Journal: Geology
Published: 01 December 2016
Geology (2016) 44 (12): 1055-1058.
... tectonic model involving simple rotation in a suprasubduction zone setting. Lower oceanic crustal gabbros and underlying mantle peridotites dominate the southern massifs of the Oman ophiolite. We focus on sections in Wadi Abyad (Rustaq massif) and Wadi Khafifah (Ibra massif), where long transects...
Journal Article
Published: 01 October 1991
Canadian Journal of Earth Sciences (1991) 28 (10): 1635-1652.
... and the Bay of Islands as a suprasubduction-zone ophiolite. C'est dans le Complexe de Bay of Islands de l'allochtone de Humber Arm, dans la partie occidentale de Terre-Neuve, que l'on trouve les meilleurs affleurements d'ophiolite dans l'orogène des Appalaches. Les écailles structurales associées, les...
Journal Article
Journal: GSA Bulletin
Published: 21 February 2018
GSA Bulletin (2018) 130 (7-8): 1339-1354.
... that the Dadeville Complex likely formed in an Ordovician suprasubduction environment on Laurentian crust. This conclusion is compatible with recent interpretations of west-directed subduction as the concluding event of the northern Appalachian Taconic orogeny, but it suggests that the southern Laurentian margin...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP390.11
EISBN: 9781862396661
... on the Laurentian side of the Iapetus Ocean. The observed ɛNd ( t ) values between 0.7 and 2.4 are consistent with this interpretation. The geochemical, geochronological and isotopic data available from the Trondheim Region ophiolites and associated rocks suggest that they formed in a suprasubduction-zone...
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Journal Article
Journal: GSA Bulletin
Published: 01 November 2005
GSA Bulletin (2005) 117 (11-12): 1413-1426.
...-sheeted dike-basalt sequence. All tholeiites have suprasubduction zone chemical characteristics, but the suprasubduction zone signature decreases toward the top of the basalt sequence. The third magmatic episode is composed of primitive dikes, which are interpreted as off-axis intrusions. Other ophiolites...
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