2004
DOI: 10.2747/0020-6814.46.12.1053
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Field and Isotopic Evidence for Fluid Mobility in the Franciscan Complex: Forearc Paleohydrogeology to Depths of 30 Kilometers

Abstract: In the Franciscan Complex exposed in the California Coast and Diablo ranges (representing depths of up to 30 km in a Mesozoic to Early Tertiary accretionary prism), differences in porosity, permeability, and rheology impacted geometries and scales of fluid mobility and the deep entrainment of pore water (chemically evolved seawater). Carbon and O isotope compositions of abundant, texturally diverse CaCO 3 veins (most veins with δ 13 C VPDB = -11.0 to -3.0‰, δ 18 O VSMOW = +12.0 to +18.5‰) are in part consisten… Show more

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Cited by 19 publications
(29 citation statements)
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References 103 publications
(166 reference statements)
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“…These metasomatized rocks may constitute new bulk compositions that can influence the redistribution of major and trace elements (e.g., Bebout, 2007;King et al, 2006;Putnis and John, 2010;Scambelluri et al, 2006), which may be transported over short distances (redistribution on cm scale; e.g., Hermann, 2002;Spandler et al, 2003; or long distances (removal from a system on outcrop scale; e.g., Gao et al, 2007;Zack and John, 2007;John et al, 2008;Spandler et al, 2011). Radiogenic and stable isotope studies in fluid-overprinted metamorphic rocks can provide information about the extent of fluid-rock interactions (e.g., Baker et al, 1997;Yui et al, 1997;Zheng et al, 1999) and the identification of potential fluid sources (e.g., Bebout and Barton, 1993;Halama et al, 2010Halama et al, , 2011King et al, 2006;Scambelluri and Phillipot, 2001;Sadofsky and Bebout, 2004). In principle, fluids in the subduction zone may originate from (I) the partly serpentinised, subducted mantle peridotite underneath the oceanic crust (Hyndman and Peacock, 2003;Ranero et al, 2003), (II) the altered oceanic crust (AOC; e.g.…”
Section: Introductionmentioning
confidence: 99%
“…These metasomatized rocks may constitute new bulk compositions that can influence the redistribution of major and trace elements (e.g., Bebout, 2007;King et al, 2006;Putnis and John, 2010;Scambelluri et al, 2006), which may be transported over short distances (redistribution on cm scale; e.g., Hermann, 2002;Spandler et al, 2003; or long distances (removal from a system on outcrop scale; e.g., Gao et al, 2007;Zack and John, 2007;John et al, 2008;Spandler et al, 2011). Radiogenic and stable isotope studies in fluid-overprinted metamorphic rocks can provide information about the extent of fluid-rock interactions (e.g., Baker et al, 1997;Yui et al, 1997;Zheng et al, 1999) and the identification of potential fluid sources (e.g., Bebout and Barton, 1993;Halama et al, 2010Halama et al, , 2011King et al, 2006;Scambelluri and Phillipot, 2001;Sadofsky and Bebout, 2004). In principle, fluids in the subduction zone may originate from (I) the partly serpentinised, subducted mantle peridotite underneath the oceanic crust (Hyndman and Peacock, 2003;Ranero et al, 2003), (II) the altered oceanic crust (AOC; e.g.…”
Section: Introductionmentioning
confidence: 99%
“…The Monviso example represents a within-slab tract of gabbroic rocks, metamorphosed in a more continental-type subduction setting (the more saline inclusions were also noted by Scambelluri et al 1998Scambelluri et al , 2002Nadeau et al 1993;Scambelluri and Philippot 2001;Fu et al 2002;Franz et al 2001). The other settings reflect higher degrees of fluid flux in deforming mélange zones metamorphosed in a more oceanic setting (lowersalinity inclusions also noted by Sadofsky and Bebout 2004; also see Gao and …”
Section: Direct Analyses Of "Fluids" In Fluid and Melt Inclusionsmentioning
confidence: 99%
“…However, in some cases it is difficult to identify isotopic effects of large-scale flow of fluid through relatively uniform reservoirs (e.g., large expanses of sandstone-shale sequences in accretionary complexes) and without large temperature differences along flow paths, given the inherent isotopic heterogeneities in these rocks. In this case, the fluids can be relatively non-reactive, having previously, isotopically equilibrated with similar rocks at similar temperatures (see discussion in Sadofsky and Bebout 2004).…”
Section: General Comments Regarding the Scales Of Metasomatismmentioning
confidence: 99%
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