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Diahot Unit

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Journal Article
Published: 01 November 2013
Bulletin de la Société Géologique de France (2013) 184 (6): 545-556.
... that progressively filled up the basin. Obduction process ended with the gravity sliding of the oceanic mantle sheet, previously scalped from its mafic cover. This process is contemporaneous with the exhumation of the HP-LT units of Pouebo and Diahot. Gravity sliding was facilitated by the occurrence of a continuous...
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Journal Article
Journal: AAPG Bulletin
Published: 01 July 1982
AAPG Bulletin (1982) 66 (7): 976.
... mineral concentrations: the pre-Senonian mafic plutono-volcanic central units with Cu (Au) deposits, probably of the massive sulfide type; the Diahot Province, to the north with Cu, Pb, Zn (Au, Ag) deposits of volcano-sedimentary type, related to Senonian-Eocene mafic volcanic activity; the West Coast...
Image
A: Cumulative plots of K-white mica  b  cell dimensions. Gray stippled line...
in > Geology
Published: 01 November 2010
samples); dark gray solid line—eastern Monts de Lacaune and St. Gervais unit (northeastern Montagne Noire, 15 samples); light gray solid line—Diahot terrane (New Caledonia; 16 samples). Black dotted lines separate different pressure facies series and corresponding ranges of metamorphic thermal gradients
Image
A simple model for the obduction of the New Caledonia ophiolite.  -  Steps ...
Published: 01 November 2013
units underplated from the lower plate (future amphibolite lenses). Chronological and petrological data are from Cluzel et al. [2006 , 2013 ]. - Step 3 . Inversion of the passive margin and continental subduction (red arrow). Construction of a tectonic wedge by accretion of sediments from
Image
A simple model for the obduction of the New Caledonia ophiolite.  -  Step 5...
Published: 01 November 2013
flysch with an important mafic contribution). Serpentinization of the future sole of the Peridotite nappe assisted by fluids extracted from the exhumed continental units. Uprising of the Pouébo terrane following a path allowing its future structural position beneath the less metamorphosed Diahot terrane
Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP414.2
EISBN: 9781862397156
... ). In the northern part of Grande Terre, three other younger units unconformably overlie the former ones: the Montagne Blanche, Diahot and Pouébo units ( Cluzel 2006 ; Cluzel et al. 2012 ; Audet 2008 ). The Koh–Chaîne Centrale unit corresponds to a part of the oceanic floor: Carboniferous ophiolites are topped...
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Series: GSA Special Papers
Published: 01 January 2007
DOI: 10.1130/2006.2419(06)
... by subsequent albite epi-dote blueschist- to greenschist-facies during exhumation for virtually all lithologic units of the HP terrane, including the Diahot and Pouébo terranes and ultramafic tectonites. In general, the P-T conditions as summarized by Fitzherbert et al. (2004) are constrained by an initial...
Journal Article
Journal: Geology
Published: 08 August 2018
Geology (2018) 46 (9): 815-818.
.... The lowest-grade samples come from the Diahot blueschist belt of New Caledonia (South Pacific), which represents a clastic metasedimentary sequence that was subducted to forearc depths (∼15–50 km) in the mid- to late Eocene ( Pirard and Spandler, 2017 ). Sample RT7-8b is a fine-grained, crenulated, quartz...
FIGURES
Journal Article
Journal: Geology
Published: 01 November 2010
Geology (2010) 38 (11): 1031-1034.
... samples); dark gray solid line—eastern Monts de Lacaune and St. Gervais unit (northeastern Montagne Noire, 15 samples); light gray solid line—Diahot terrane (New Caledonia; 16 samples). Black dotted lines separate different pressure facies series and corresponding ranges of metamorphic thermal gradients...
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Journal Article
Published: 01 May 2008
Bulletin de la Société Géologique de France (2008) 179 (3): 315-329.
... boundary of the ultramafic units, whereas in southern New-Caledonia it marks the western limit of the ultramafic nappe (fig. 1 ). Lagabrielle et al. [2005] demonstrated that significant extension has affected the southern part of New-Caledonia (Grand Massif du Sud) after the obduction...
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Journal Article
Published: 01 October 2007
European Journal of Mineralogy (2007) 19 (5): 723-734.
... terrane (Alaska) ( e.g. Patrick & Evans, 1989 ), the Cenozoic Diahot blueschist terrane (New Caledonia) ( Fitzherbert et al. , 2003 ; Spandler et al. , 2003 ), the Betic Cordillera ( Gomez-Pugnaire et al. , 1985 ) and the Alpine belt ( e.g. Ellenberger, 1960 ; Fry, 1973 ; Selverstone &...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 347-398.
... of the Sanbagawa eclogite unit (Enami, unpublished data). Mineral abbreviations employed in this chapter are after Kretz (1983) and Miyashiro (1994) other than Amph (amphibole), Bar (barroisite), Cro (crossite), Coe (coesite), Coe-ps (quartz pseudomorph after coesite), Dia (diamond), Fgln...
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Series: Geological Society Special Publication
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.184.01.06
EISBN: 9781862394322
... of high-pressure metamorphism is still in doubt, although 40 Ar/ 39 Ar apparent age spectra, reported by Ghent et al. (1994) , from the associated Diahot terrane to support emplacement at c . 55–50 Ma is a suggested interpretation. Le Pichon et al. (1992) point out that there was a major...
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