Abstract
Eclogites occur as isolated blocks in melanges of both the Samana Peninsula, Dominican Republic, and the Franciscan Complex, California, USA. In some of these eclogites, fluid inclusions were found in omphacite and sodic-calcic amphibole grains. Textures show that non-planar populations of fluid inclusions formed during growth of clinopyroxene and amphibole. In addition, planar arrays of secondary fluid inclusions are found along healed cracks. Homogenization temperatures to liquid were used to calculate isochores for the fluid inclusions. These data were compared with petrologic geothermobarometry. Temperature conditions of 500–700° C were estimated from garnetclinopyroxene geothermometry. The jadeite contents of omphacite indicate minimum pressures of 8–11 kbar in this temperature range. The P-T estimates agree well with calculated isochores for primary fluid inclusions from the Samana Peninsula, and show some overlap for both primary and secondary fluid inclusions from the Franciscan Complex. Salinities of 1.2–5.3 wt% NaCl equiv. were estimated for both primary and secondary fluid inclusions from Samana and Franciscan eclogites. These data suggest that low-salinity aqueous fluids attended eclogite-facies metamorphism and perhaps retrograde metamorphism in both subduction complexes. The salinities and densities of fluid inclusions in eclogites from the Samana Peninsula and the Franciscan Complex resemble those of counterparts from garnet amphibolites of the Catalina Schist, southern California. An external source for such fluids is suggested by their homogeneous populations coupled with their low salinities. Geologic evidence suggests that the Samana and Franciscan eclogites may have been derived from a Catalina-like source terrane. The Catalina rocks are inferred to have interacted with large volumes of sediment-derived fluid during subduction zone metamorphism at similar P but higher T conditions than those determined for Samana and Franciscan eclogite blocks. These results contrast with data for fluid inclusions from eclogites of the Monviso area, western Alps. The Monviso eclogites yield similar estimates for metamorphic P-T to those obtained in this study, but contain fluid inclusions of brine and of other saline aqueous fluids, all of which are less dense than expected for incorporation at the reported eclogite-facies conditions. The differences between the properties of fluid inclusions from the ecologites and garnet amphibolites of the Samana-Franciscan-Catalina subduction complexes and those of Monviso probably reflect differences between fluid-flow regimes during metamorphism.
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Andersen T, Burke EAJ, Austrheim H (1989) Nitrogen-bearing, aqueous fluid inclusions in some eclogites from the Western Gneiss Region of the Norwegian Caledonides. Contrib Mineral Petrol 103:153–165
Anderson RN, Uyeda S, Miyashiro A (1976) Geophysical and geochemical constraints at converging plate boundaries-Part I: dehydration in the downgoing slab. Geophys J R Astron Soc 44:333–357
Anderson RN, Delong SE, Schwarz WM (1978) Thermal model for subduction with dehydration in the downgoing slab. J Geol 86:731–739
Bailey EH, Irwin WP, Jones DL (1964) Franciscan and related rocks, and their significance in the geology of western California. Calif Div Mines Geol Bull 183
Barr, H (1990) Preliminary fluid inclusion studies in a high-grade blueschist terrain, Syros, Greece. Mineral Mag 54:159–168
Barrientos X (1992) Petrology of coexisting blueschists and greenschists, Ile de Groix, France: implications for preservation of blueschists. PhD Dissertation, Harvard University, Cambridge, Massachusetts
Barrientos X, Selverstone J (1993) Infiltration vs. thermal overprinting of epidote blueschists, Ile de Groix, France. Geology 21:69–72
Bebout GE (1989) Geological and geochemical investigations of fluid flow and mass transfer during subduction zone metamorphism. PhD Dissertation, University of California, Los Angeles
Bebout GE (1991) Field-based evidence for devolatilization in subduction zones: implications for arc magmatism. Science 251:413–416
Bebout GE, Barton MD (1989) Fluid flow and metasomatism in a subduction zone hydrothermal system: Catalina Schist terrane, California. Geology 17:976–980
Borg IY (1956 Glaucophane schists and eclogites near Healdsburg, California. Geol. Soc Am Bull 67:1563–1584
Bowin, CO, Nagle F (1982) Igneous and metamorphic rocks of northern Dominican Republic: an uplifted subduction zone complex. Trans 9th Caribb Geol Conf, pp 39–50
Brown EH, Bradshaw JY (1979) Phase relations of pyroxene and amphibole in greenstone, blueschist and eclogite of the Franciscan Complex California. Contrib Mineral Petrol 71:67–83
Brown, PE (1989) FLINCOR: a microcomputer program for the reduction and investigation of fluid-inclusion data. Am Mineral 74:1390–1394
Burg J-P, Philippot P (1991) Asymmetric compositional layering of syntectonic metamorphic veins as a way-up criterion. Geology 19:1112–1115
Carswell DA (1989) Eclogites and the eclogite facies: definitions and classifications. In: Carswell DA (ed) Eclogite facies rocks. Blackie, Glasgow London, pp 1–14
Cloos M (1983) Comparative study of melange matrix and metashales from the Franciscan subduction complex with the basal Great Valley sequence, California. J Geol 91:291–306
Cloos M (1985) Thermal evolution of convergent plate margins: thermal modeling and reevaluation of isotopic K−Ar ages for blueschists in the Franciscan Complex of California. Tectonics 4:421–433
Cloos M (1986) Blueschists in the Franciscan Complex of California: petrotectonic constraints on uplift mechanisms. Geol Soc Am Mem 164:77–95
Coleman RG (1961) Jadeite deposits of the Clear Creek area, New Idria district, San Benito County, California. J Petrol 2:209–247
Coleman RG (1967) Low-temperature reaction zones and alpine ultramafic rocks of California, Oregon, and Washington. US Geol Surv Bull 1247:1–49
Coleman RG (1980) Tectonic inclusions in serpentinites. Arch Sci Soc Phys Hist Nat Geneve 33:89–102
Coleman RG, Lanphere MA (1971) Distribution and age of highgrade blueschists, associated eclogites and amphibolites from Oregon and California. Geol Soc Amer Bull 82:2397–2412
Coleman RG, Lee DE, Beatty LB, Brannock WE (1965) Eclogites and eclogites-their differences and similarities. Geol Soc Amer Bull 76:483–508
Crawford ML, Filter J, Wood C (1979) Saline fluid inclusions associated with retrograde metamorphism. Bull Mineral 102:562–568
Crawford WA (1965) Studies in Franciscan metamorphism near Jenner, California. PhD Dissertation, University of California, Berkeley
Delany JM, Helgeson HC (1988) Calculation of the thermodynamic consequences of dehydration in subducting oceanic crust to 100 kb and >800 C. Am J Sci 278:638–686
Doyle JA, Bodnar RJ, Hewitt DA (1988) Fluid inclusions from blueschist-grade metamorphic rocks: what do they tell us? Geol Soc Am Abstr Prog 20:A101
Draper G, Lewis JF (1991) Metamorphic belts in central Hispaniola. Geol Soc Am Spec Pap 262:29–45
Dudley PO (1972) Comments on the distribution and age of high-grade blueschists, associated eclogites and amphibolites from the Tiburon Peninsula, California. Geol Soc Am Bull 83:3497–3500
Ellis DJ, Green DH (1979) An experimental study of the effect of Ca upon garnet-clinopyroxene Fe−Mg exchange equilibria. Contrib Mineral Petrol 71:12–22
Ernst WG (1971) Petrologic reconnaisance of Franciscan metagraywackes from the Diablo Range, central California Coast Ranges. J Petrol 12:413–437
Ernst WG (1977) Tectonics and prograde versus retrograde P-T trajectories of high-pressure metamorphic belts. Rend Soc Ital Mineral Petrol 33:191–220
Ernst WG (1988) Tectonic history of subduction zones inferred from retrograde blueschist P-T paths. Geology 16:1081–1084
Ernst WG (1990) Thermobarometric and fluid expulsion history of subduction zones. J Geophys Res 95:9047–9053
Ernst WG (1993) Metamorphism of Franciscan tectonostratigraphic assemblage, Pacheco Pass area, east-central Diablo Range, California Coast Ranges. Geol Soc Am Bull 105:618–636
Fyfe WS, Price NJ, Thompson AB (1978) Fluids in the earth's crust (Developments in Geochemistry 1). Elsevier, Amsterdam, Oxford, New York
Garrels RM, Mackenzie FT (1970) Evolution of sedimentary rocks. Norton, New York, pp 397
Ghent ED (1988) A review of chemical zoning in eclogite garnets. In Smith DC (ed) Eclogites and eclogite-facies rocks (Developments in Petrology 12). Elsevier, Amsterdam, Oxford, New York, Tokyo, pp 207–231
Ghent ED, Goleman RG (1973) Eclogites from southwestern Oregon. Geol Soc Am Bull 84:2471–2488
Graham CM, Powell R (1984) A garnet-hornblende geothermometer: calibration, testing, and application to the Pelona Schist, southern California. J Metamorphic Geol 2:13–31
Hamilton W (1969) Mesozoic California and the underflow of Pacific mantle. Geol Soc Am Bull 80:2409–2430
Harlow GE (1994) Jadeitites, albitites, and related rocks from the Motagua Fault Sone, Guatemala. J Metamorphic Geol 12:49–68
Holway RS (1904) Eclogites in California. J Geol 12:344–358
Ingersoll RV, Schweickert RA, Kleist JR, Graham SA, Cowan DS (1984) Field guide to the Mesozoic-Cenozoic convergent margin of northern California: revised roadlogs. In: Lintz J (ed) Western geological excursions vol. 4, prepared for the 1984 Annual Meetings of the Geological Society of America and affiliated Societies at Reno, pp 304–353
Jarosewich E, Nelen JA, Norberg JA (1980) Reference samples for electron microprobe analysis. Geostandards Newsletter 4:43–47
Joyce J (1980) Geology of Samana Peninsula. Field Trip F in Field Guide for the 9th Caribbean Geological Conference:247–258
Joyce J (1985) High-pressure-low-temperature metamorphism and tectonic evolution of the Samana Peninsula, Dominican Republic (Greater Antilles). PhD Dissertation, Northwestern University
Joyce J (1991) Blueschist metamorphism and deformation on the Samana Peninsula; a record of subduction and collision in the Greater Antilles. Geol Soc Amer Spec Pap 262:47–76
Klemd R (1989) P-T evolution and fluid inclusion characteristics of retrograded eclogites, Munchberg Gneiss Complex, Germany. Contrib Mineral Petrol 102:221–229
Krogh EJ (1988) The garnet-clinopyroxene Fe−Mg geothermometer—a reinterpretation of existing experimental data. Contrib Mineral Petrol 99:44–48
Moore DE (1984) Metamorphic history of a high-grade blueschist exotic block from the Franciscan Complex, California. J Petrol 25:126–150
Moore DE, Blake MC (1989) New evidence for polyphase metamorphism of glaucophane schist and eclogite exotic blocks in the Franciscan Complex, California and Oregon. J Metamorphic Geol 7:211–228
Moore JC, Vrolijk P (1992) Fluids in accretionary prisms. Rev Geophys 30:113–135
Moran AE, Sisson VB, Leeman WP (1992) Boron depletion during progressive metamorphism: implications for subduction processes. Earth Planet Sci Lett 111:331–349
Nadeau S, Philippot P, Pineau F (1993) Fluid inclusions and mineral isotopic compositions (C−H−O) in eclogitic rocks as tracers of local fluid migration during high-P metamorphism. Earth Planet Sci Lett 114:431–449
Nagle F (1974) Blueschist, eclogite, paired metamorphic belts, and the early tectonic history of Hispaniola. Geol Soc Am Bull 85:1461–1466
Nelson BK (1991) Sediment-derived fluids in subduction zones: sotopic evidence from veins in blueschist and eclogite of the Franciscan Complex, California. Geology 19:1033–1037
Oh C-W (1990) The metamorphic evolution of the high-grade blocks in the Franciscan Complex, California, U.S.A. PhD Dissertation, Stanford University
Oh C-W, Liou JG (1990) Metamorphic evolution of two different eclogites in the Franciscan Complex, California, U.S.A. Lithos 25:41–53
Peacock SM (1987) Creation and preservation of subduction-related inverted metamorphic gradients. J Geophys Res 92:12,763–12,781
Peacock SM (1990) Fluid processes in subduction zones. Science 248:329–337
Peacock SM (1992) Blueschist-facies metamorphism, shear heating, and P-T-t paths in subduction shear zones. J Geophys Res 97:17,693–17,707
Peacock SM (1993) The importance of blueschist Ý eclogite dehydration reactions in subducting oceanic crust. Geol Soc Am Bull 105:684–694
Perfit MR, Heezen BC, Rawson M, Donnelly TW (1980) Chemistry, origin, and tectonic significance of metamorphic rocks from the Puerto Rico Trench. Mar Geol 34:125–156
Perfit MR, McCulloch (1982) Nd- and Sr-isotope geochemistry of eclogites and blueschists from the Hispaniola-Puerto Rico subduction zone. Terra Cognita 2:Abstr I8
Perfit MR, Nagle F, Bowin CO (1982) Petrology and geochemistry of eclogites and blue-schists from Hispaniola. Terra Cognita 2:Abstr W7
Philippot P (1993) Fluid-melt-rock interaction in mafic eclogites and coesite-bearing metasediments: constraints on volatile recycling during subduction. Chem Geol 108:93–112
Philippot P, Selverstone J (1991) Trace-element-rich brines in eclogitic veins: implications for fluid composition and transport during subduction. Contrib Mineral Petrol 106:417–430
Philippot P, van Roermund HLM (1992) Deformation processes in eclogitic rocks: evidence for the rheological delamination of the oceanic crust in deeper levels of subduction zones. J Struct Geol 14:1059–1077
Platt JP (1975) Metamorphic and deformational processes in the Franciscan Complex, California: some insights from the Catalina Schist terrane. Geol Soc Am Bull 86:1337–1347
Ransome FL (1895) On lawsonite, a new rock-forming mineral from the Tiburon Peninsula, Marin County, California. Calif Univ Dept Geol Bull 1:193–234
Rice SJ, Smith TC, Strand RG (1976) Geology for planning, central and southeastern Marin County, California. Calif Div Mines Geol Open File Rep OFR 76-2
Roedder E (1967) Metastable superheated ice in liquid-water inclusions under high negative pressure. Science 155:1413–1417
Roedder E (1984) Fluid inclusions (Reviews in Mineralogy vol. 12). Mineralogical Society of America, Washington DC
Schliestedt M (1989) Occurrence and stability conditions of low-temperature eclogites. In: Carswell DA (ed) Eclogite facies rocks, Blackie, Glasgow, London, pp 160–180
Selverstone J, Franz G, Thomas S, Getty S (1992) Fluid variability in 2 GPa eclogites as an indicator of fluid behavior during subduction. Contrib Mineral Petrol 112:341–357
Sorensen SS (1988) Petrology of amphibolite-facies mafic and ultramafic rocks from the Catalina Schist, southern California: metasomatism and migmatization in a subduction zone metamorphic setting. J Metamor Geol 6:405–435
Sorensen SS, Barton MD (1987) Metasomatism and partial melting in a subduction complex: Catalina Schist, southern California. Geology 15:115–118
Sorensen SS, Grossman JN (1989) Enrichment of trace elements in garnet amphibolites from a paleo-subduction zone: Catalina Schist, southern California. Geochim Cosmochim Acta 53:3155–3177
Switzer G (1945) Eclogite from the California glaucophane schists. Am J Sci 243:1–8
Taliferro NL (1943) The Franciscan-Knoxville problem. Bull Am Assoc Pet Geol 27:109–219
Tatsumi Y (1989) Migration of fluid phases and genesis of basaltic magmas in subduction zones. J Geophys Res 94:4697–4707
Touret JLR (1992) Fluid inclusions in subducted rocks. Proceedings Koninklijke Nederlandse Akadamie van Wetenschappen 95:385–403
Zhang Y, Franz JD (1987) Determination of the homogenization temperatures and densities of supercritical fluids in the system NaCl−KCl−CaCl2−H2O using synthetic fluid inclusions. Chem Geol 64:335–350
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Giaramita, M.J., Sorensen, S.S. Primary fluids in low-temperature eclogites: evidence from two subduction complexes (Dominican Republic, and California, USA). Contr. Mineral. and Petrol. 117, 279–292 (1994). https://doi.org/10.1007/BF00310869
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DOI: https://doi.org/10.1007/BF00310869