Carbon release from submarine seeps at the Costa Rica fore arc: Implications for the volatile cycle at the Central America convergent margin

Geochemistry, Geophysics, Geosystems

Volumn 11, Issue 4, 2010, Pages

  Füri, Evelyn ^a   Hilton, David R ^a   Tryon, Michael D ^a   Brown, Kevin M ^a   McMurtry, Gary M ^b   Brückmann, Warner ^c   Wheat, C Geoffrey ^d  

^a GEOSCIENCES RESEARCH DIVISION   (United States)

^b UNIVERSITY OF HAWAII   (United States)

^c GEOMAR HELMHOLTZ CENTRE FOR OCEAN RESEARCH KIEL   (Germany)

^d UNIVERSITY OF ALASKA FAIRBANKS   (United States)

Author keywords

Biogeosciences; Geochemistry

Indexed keywords

EID: 77951731968     PISSN: 15252027     EISSN: 15252027     Source Type: Journal    
DOI: 10.1029/2009GC002810     Document Type: Article

References (94)

1. Alt, J. C., and D. A. H. Teagle (1999), The uptake of carbon during alteration of ocean crust, Geochim. Cosmochim. Acta, 63(10), 1527-1535, doi:10.1016/S0016-7037(99)00123-4. (Pubitemid 29515091)
2. Alvarado, G. E., P. Denyer, and C. W. Sinton (1997), The 89 Ma Tortugal komatiitic suite, Costa Rica: Implications for a common geological origin of the Caribbean and eastern Pacific region from a mantle plume, Geology, 25(5), 439-442, doi:10.1130/0091-7613(1997)025<0439:TMTKSC>2.3. CO;2.
3. Andrews, J. N. (1985), The isotopic composition of radiogenic helium and its use to study groundwater movement in confined aquifers, Chem. Geol., 49(1-3), 339-351, doi:10.1016/0009- 2541(85)90166-90174
4. Ballentine, C. J., R. Burgess, and B. Marty (2002), Tracing fluid origin, transport and interaction in the crust, in Noble Gases in Geochemistry and Cosmochemistry, Rev. in Mineral. and Geochem., vol.47, edited by D. Porcelli, C. Ballentine, and R. Wieler, pp. 539-614, Mineral. Soc. of Am., Washington, D. C.
5. Barry, P. H., D. R. Hilton, M. D. Tryon, K. M. Brown, and J. T. Kulongoski (2009), A new syringe pump apparatus for the retrieval and temporal analysis of helium in groundwaters and geothermal fluids, Geochem. Geophys. Geosyst., 10, Q05004, doi:10.1029/2009GC002422.
6. Boetius, A., K. Ravenschlag, C. J. Schubert, D. Rickert, F. Widdel, A. Gieseke, R. Amann, B. B. Jorgensen, U. Witte, and O. Pfannkuche (2000), A marine microbial consortium apparently mediating anaerobic oxidation of methane, Nature, 407(6804), 623-626, doi:10.1038/35036572.
7. Bohrmann, G., et al. (2002), Widespread fluid expulsion along the seafloor of the Costa Rica convergent margin, Terra Nova, 14(2), 69-79, doi:10.1046/j.1365-3121.2002.00400.x. (Pubitemid 34440037)
8. Brennwald, M. S., M. Hofer, F. Peeters, W. Aeschbach-Hertig, K. Strassmann, R. Kipfer, and D. M. Imboden (2003), Analysis of dissolved noble gases in the porewater of lacustrine sediments, Limnol. Oceanogr. Methods, 1, 51-62.
9. Brennwald, M. S., R. Kipfer, and D. M. Imboden (2005), Release of gas bubbles from lake sediment traced by noble gas isotopes in the sediment pore water, Earth Planet. Sci. Lett., 235(1-2), 31-44, doi:10.1016/j.epsl.2005.03. 004. (Pubitemid 40841288)
10. Byrne, D. E., D. M. Davis, and L. R. Sykes (1988), Loci and maximum size of thrust earthquakes and the mechanics of the shallow region of subduction zones, Tectonics, 7(4), 833-857, doi:10.1029/TC007i004p00833.
11. Chan, L. H., and M. Kastner (2000), Lithium isotopic compositions of pore fluids and sediments in the Costa Rica subduction zone: Implications for fluid processes and sediment contribution to the arc volcanoes, Earth Planet. Sci. Lett., 183(1-2), 275-290, doi:10.1016/S0012-821X(00)00275-2. (Pubitemid 32010680)
12. Cussler, E. L. (1984), Diffusion: Mass Transfer in Fluid Systems, 525 pp., Cambridge Univ. Press, Cambridge, U. K.
13. De Leeuw, G. A. M., D. R. Hilton, T. P. Fischer, and J. A. Walker (2007), The He-CO2 isotope and relative abundance characteristics of geothermal fluids in El Salvador and Honduras: New constraints on volatile mass balance of the Central American Volcanic Arc, Earth Planet. Sci. Lett., 258(1-2), 132-146, doi:10.1016/j.epsl.2007.03.028. (Pubitemid 46780107)
14. DeMets, C. (2001), A new estimate for present-day Cocos- Caribbean plate motion: Implications for slip along the Central American volcanic arc, Geophys. Res. Lett., 28(21), 4043-4046, doi:10.1029/2001GL013518. (Pubitemid 33122445)
15. DeShon, H. R., and S. Y. Schwartz (2004), Evidence for serpentinization of the forearc mantle wedge along the Nicoya Peninsula, Costa Rica, Geophys. Res. Lett., 31, L21611, doi:10.1029/2004GL021179. (Pubitemid 40190972)
16. Dogan, T., H. Sumino, K. Nagao, and K. Notsu (2006), Release of mantle helium from forearc region of the Southwest Japan arc, Chem. Geol., 233(3-4), 235-248, doi:10.1016/j.chemgeo. 2006.03.008.
17. Emrich, K., and J. C. Vogel (1970), Carbon isotope fractionation during precipitation of calcium carbonate, Earth Planet. Sci. Lett., 8(5), 363-371, doi:10.1016/0012-821X(70)90109-3.
18. Fisher, D. M., T. W. Gardner, J. S. Marshall, P. B. Sak, and M. Protti (1998), Effect of subducting sea-floor roughness on fore-arc kinematics, Pacific coast, Costa Rica, Geology, 26(5), 467-470, doi:10.1130/0091-7613(1998) 026<0467: EOSSFR>2.3.CO;2.
19. Füri, E., D. R. Hilton, K. M. Brown, and M. D. Tryon (2009), Helium systematics of cold seep fluids at Monterey Bay, California, USA: Temporal variations and mantle contributions, Geochem. Geophys. Geosyst., 10, Q08013, doi:10.1029/ 2009GC002557.
20. Giggenbach, W. F., Y. Sano, and H. Wakita (1993), Isotopic composition of helium, and CO2 and CH4 contents in gases produced along the New-Zealand part of a convergent plate boundary, Geochim. Cosmochim. Acta, 57(14), 3427-3455, doi:10.1016/0016-7037(93)90549-C. (Pubitemid 24418354)
21. Gorman, P. J., D. M. Kerrick, and J. A. D. Connolly (2006), Modeling open system metamorphic decarbonation of subducting slabs, Geochem. Geophys. Geosyst., 7, Q04007, doi:10.1029/2005GC001125.
22. Graham, D. W. (2002), Noble gas isotope geochemistry of mid-ocean ridge and ocean island basalts: Characterization of mantle source reservoirs, in Noble Gases in Geochemistry and Cosmochemistry, Rev. in Mineral. and Geochem., vol.47, edited by D. Porcelli, C. Ballentine, and R. Wieler, pp. 247-317, Mineral. Soc. of Am., Washington, D. C.
23. Han, M. W., and E. Suess (1989), Subduction-induced pore fluid venting and the formation of authigenic carbonates along the Cascadia continental margin: Implications for the global Ca-cycle, Palaeogeogr. Palaeoclimatol. Paleoecol., 71(1-2), 97-118, doi:10.1016/0031-0182(89)90032-1.
24. Han, X. Q., E. Suess, H. Sahling, and K. Wallmann (2004), Fluid venting activity on the Costa Rica margin: New results from authigenic carbonates, Int. J. Earth Sci., 9(4), 596-611, doi:10.1007/s00531-004-0402-y. (Pubitemid 39483610)
25. Hauff, F., K. Hoernle, P. van den Bogaard, G. Alvarado, and D. Garbe-Schönberg (2000a), Age and geochemistry of basaltic complexes in western Costa Rica: Contributions to the geotectonic evolution of Central America, Geochem. Geophys. Geosyst., 1(5), 1009, doi:10.1029/1999GC000020.
26. Hauff, F., K. Hoernle, G. Tilton, D. W. Graham, and A. C. Kerr (2000b), Large volume recycling of oceanic lithosphere over short time scales: Geochemical constraints from the Caribbean Large Igneous Province, Earth Planet. Sci. Lett., 174(3-4), 247-263, doi:10.1016/S0012-821X(99)00272-1. (Pubitemid 30138412)
27. Hensen, C., K. Wallmann, M. Schmidt, C. R. Ranero, and E. Suess (2004), Fluid expulsion related to mud extrusion off Costa Rica-A window to the subducting slab, Geology, 32(3), 201-204, doi:10.1130/G20119.1. (Pubitemid 38423518)
28. Hilton, D. R. (1996), The helium and carbon isotope systematics of a continental geothermal system; results from monitoring studies at Long Valley Caldera (California, U.S.A.), Chem. Geol., 127(4), 269-295, doi:10.1016/0009- 2541(95)00134-4.
29. Hilton, D. R., T. P. Fischer, and B. Marty (2002), Noble gases and volatile recycling at subduction zones, in Noble Gases in Geochemistry and Cosmochemistry, Rev. in Mineral. and Geochem., vol.47, edited by D. Porcelli, C. Ballentine, and R.Wieler, pp. 319-370, Mineral. Soc. ofAm.,Washington, D. C.
30. Hilton, D. R., T. P. Fischer, C. Ramirez, E. Füri, P. H. Barry, K. M. Brown, W. Montero, and P. Denyer (2009), Helium isotopes in the seismogenic zone of Costa Rica, paper presented at Developments in Noble Gas Understanding and Expertise Workshop, Cent. de Rech. Pétrogr. et Géochim., Nancy, France.
31. Holzner, C. P., D. F. McGinnis, C. J. Schubert, R. Kipfer, and D. M. Imboden (2008), Noble gas anomalies related to highintensity methane gas seeps in the Black Sea, Earth Planet. Sci. Lett., 265(3-4), 396-409, doi:10.1016/j.epsl.2007.10.029.
32. Huehnerbach, V., D. G. Masson, G. Bohrmann, J. M. Bull, and W. Weinrebe (2005), Deformation and submarine landsliding caused by seamount subduction beneath the Costa Rica continental margin-New insights from high-resolution sidescan sonar data, in Submarine Slope Systems: Processes and Products, edited by D. M. Hodgson and S. S. Flint, Geol. Soc. Spec. Publ., 244, 195-205, doi:10.1144/GSL. SP.2005.244.01.12.
33. Jähne, B., G. Heinz, and W. Dietrich (1987), Measurement of the diffusion coefficients of sparingly soluble gases in water, J. Geophys. Res., 92(C10), 10,767-10,776, doi:10.1029/ JC092iC10p10767.
34. Judd, A. G. (2003), The global importance and context of methane escape from the seabed, Geo Mar. Lett., 23(3-4), 147-154, doi:10.1007/s00367-003-0136- z. (Pubitemid 38127122)
35. Judd, A. G., and M. Hovland (2007), Seabed Fluid Flow: The Impact on Geology, Biology, and the Marine Environment, 475 pp., Cambridge Univ. Press, Cambridge, U. K.
36. Kahn, L. M., E. A. Silver, D. Orange, R. Kochevar, and B. McAdoo (1996), Surficial evidence of fluid expulsion from the Costa Rica Accretionary Prism, Geophys. Res. Lett., 23(8), 887-890, doi:10.1029/96GL00732. (Pubitemid 26476050)
37. Kastner, M., H. Elderfield, W. J. Jenkins, J. M. Gieskes, and T. Gamo (1993), Geochemical and isotopic evidence for fluid flow in the western Nankai subduction zone, Japan, Proc. Ocean Drill. Program Sci. Results, 131, 397-413.
38. Kennedy, B. M., and M. C. van Soest (2007), Flow of mantle fluids through the ductile lower crust: Helium isotope trends, Science, 318(5855), 1433-1436, doi:10.1126/science. 1147537.
39. Kennedy, B. M., Y. K. Kharaka, W. C. Evans, A. Ellwood, D. J. DePaolo, J. Thordsen, G. Ambats, and R. H. Mariner (1997), Mantle fluids in the San Andreas Fault System, California, Science, 278(5341), 1278-1281, doi:10.1126/ science.278.5341.1278.
40. Kerr, A. C., J. Tarney, A. Nivia, G. F. Marriner, and A. D. Saunders (1998), The internal structure of oceanic plateaus: Inferences from obducted Cretaceous terranes in western Colombia and the Caribbean, Tectonophysics, 292(3-4), 173-188, doi:10.1016/S0040-1951(98)00067-5.
41. Kimura, G., et al. (Eds.) (1997), Proceedings of the Ocean Drilling Program, Initial Reports, vol.170, Ocean Drill. Program, College Station, Tex.
42. Klaucke, I., D. G. Masson, C. J. Petersen, W. Weinrebe, and C. R. Ranero (2008), Multifrequency geoacoustic imaging of fluid escape structures offshore Costa Rica: Implications for the quantification of seep processes, Geochem. Geophys. Geosyst., 9, Q04010, doi:10.1029/2007GC001708.
43. Kopf, A., A. Deyhle, and E. Zuleger (2000), Evidence for deep fluid circulation and gas hydrate dissociation using boron and boron isotopes of pore fluids in forearc sediments from Costa Rica (ODP Leg 170), Mar. Geol., 167(1-2), 1-28, doi:10.1016/S0025-3227(00)00026-8. (Pubitemid 30427423)
44. Kroopnick, P. M. (1985), The distribution of 13C of -CO2 in the world oceans, Deep Sea Res., 32(1), 57-84, doi:10.1016/ 0198-0149(85)90017-90022
45. Kulongoski, J. T., and D. R. Hilton (2002), A quadrupolebased mass spectrometric system for the determination of noble gas abundances in fluids, Geochem. Geophys. Geosyst., 3(6), 1032, doi:10.1029/2001GC000267.
46. La Bonte, A. L., K. M. Brown, and M. D. Tryon (2007), Monitoring periodic and episodic flow events at Monterey Bay seeps using a new optical flow meter, J. Geophys. Res., 112, B02105, doi:10.1029/2006JB004410. (Pubitemid 46994522)
47. Leifer, I., and J. Clark (2002), Modeling trace gases in hydrocarbon seep bubbles. Application to marine hydrocarbon seeps in the Santa Barbara Channel, Geol. Geofiz., 43(7), 613-621.
48. Leifer, I., J. R. Boles, B. P. Luyendyk, and J. F. Clark (2004), Transient discharges from marine hydrocarbon seeps: Spatial and temporal variability, Environ. Geol., 46(8), 1038-1052, doi:10.1007/s00254-004-1091-3. (Pubitemid 40024909)
49. Li, L., and G. E. Bebout (2005), Carbon and nitrogen geochemistry of sediments in the Central American convergent margin: Insights regarding subduction input fluxes, diagenesis, and paleoproductivity, J. Geophys. Res., 110, B11202, doi:10.1029/2004JB003276. (Pubitemid 43051425)
50. Linke, P., K. Wallmann, E. Suess, C. Hensen, and G. Rehder (2005), In situ benthic fluxes from an intermittently active mud volcano at the Costa Rica convergent margin, Earth Planet. Sci. Lett., 235(1-2), 79-95, doi:10.1016/j.epsl. 2005.03.009.
51. Luff, R., and K. Wallmann (2003), Fluid flow, methane fluxes, carbonate precipitation and biogeochemical turnover in gas hydrate-bearing sediments at Hydrate Ridge, Cascadia Margin: Numerical modeling and mass balances, Geochim. Cosmochim. Acta, 67(18), 3403-3421, doi:10.1016/S0016- 7037(03)00127-133
52. Marty, B., and A. Jambon (1987), C/3He in volatile fluxes from the solid Earth-Implications for carbon geodynamics, Earth Planet. Sci. Lett., 83(1-4), 16-26, doi:10.1016/0012- 821X(87)90047-90051
53. Matsumoto, T., T. Kawabata, J. Matsuda, K. Yamamoto, and K. Mimura (2003), 3He/4He ratios in well gases in the Kinki district, SW Japan: Surface appearance of slab-derived fluids in a non-volcanic area in Kii Peninsula, Earth Planet. Sci. Lett., 216(1-2), 221-230, doi:10.1016/S0012-821X(03) 00479-5.
54. Mau, S., H. Sahling, G. Rehder, E. Suess, P. Linke, and E. Soeding (2006), Estimates of methane output from mud extrusions at the erosive convergent margin off Costa Rica, Mar. Geol., 225(1-4), 129-144, doi:10.1016/j.margeo. 2005.09.007.
55. Mau, S., G. Rehder, I. G. Arroyo, J. Gossler, and E. Suess (2007), Indications of a link between seismotectonics and CH4 release from seeps off Costa Rica, Geochem. Geophys. Geosyst., 8, Q04003, doi:10.1029/2006GC001326.
56. McIntosh, K. D., and M. K. Sen (2000), Geophysical evidence for dewatering and deformation processes in the ODP Leg 170 area offshore Costa Rica, Earth Planet. Sci. Lett., 178(1-2), 125-138, doi:10.1016/S0012-821X(00) 00069-8. (Pubitemid 30329808)
57. McIntosh, K. D., and E. A. Silver (1996), Using 3D seismic reflection data to find fluid seeps from the Costa Rica Accretionary Prism, Geophys. Res. Lett., 23(8), 895-898, doi:10.1029/95GL02010. (Pubitemid 26476051)
58. Milkov, A. V., G. E. Claypool, Y. J. Lee, W. Y. Xu, G. R. Dickens, and W. S. Borowski (2003), In situ methane concentrations, at Hydrate Ridge, offshore Oregon: New constraints on the global gas hydrate inventory from an active margin, Geology, 31(10), 833-836, doi:10.1130/G19689.1.
59. Moore, J. C., and D. Saffer (2001), Updip limit of the seismogenic zone beneath the accretionary prism of southwest Japan: An effect of diagenetic to low-grade metamorphic processes and increasing effective stress, Geology, 29(2), 183-186, doi:10.1130/0091-7613(2001)029<0183:ULOTSZ>2.0. CO;2.
60. Morris, J., R. Valentine, and T. Harrison (2002), 10Be imaging of sediment accretion and subduction along the northeast Japan and Costa Rica convergent margins, Geology, 30(1), 59-62, doi:10.1130/0091-7613(2002) 030<0059: BIOSAA>2.0.CO;2.
61. Newman, A. V., S. Y. Schwartz, V. Gonzalez, H. R. DeShon, J. M. Protti, and L. M. Dorman (2002), Along-strike variability in the seismogenic zone below Nicoya Peninsula, Costa Rica, Geophys. Res. Lett., 29(20), 1977, doi:10.1029/ 2002GL015409.
62. Poreda, R. J., A. W. A. Jeffrey, I. R. Kaplan, and H. Craig (1988), Magmatic helium in subduction-zone natural gases, Chem. Geol., 71, 199-210, doi:10.1016/0009-2541(88) 90115-5.
63. Ranero, C. R., and R. von Huene (2000), Subduction erosion along the Middle America convergent margin, Nature, 404(6779), 748-752, doi:10.1038/35008046. (Pubitemid 30212399)
64. Ranero, C. R., I. Grevemeyer, H. Sahling, U. Barckhausen, C. Hensen, K. Wallmann, W. Weinrebe, P. Vannucchi, R. von Huene, and K. McIntosh (2008), Hydrogeological system of erosional convergent margins and its influence on tectonics and interplate seismogenesis, Geochem. Geophys. Geosyst., 9, Q03S04, doi:10.1029/2007GC001679.
65. Saffer, D. M., E. A. Silver, A. T. Fisher, H. Tobin, and K. Moran (2000), Inferred pore pressures at the Costa Rica subduction zone: Implications for dewatering processes, Earth Planet. Sci. Lett., 177(3-4), 193-207, doi:10.1016/S0012-821X(00) 00048-0.
66. Sahling, H., D. G. Masson, C. R. Ranero, V. Hühnerbach, W. Weinrebe, I. Klaucke, D. Bürk, W. Brückmann, and E. Suess (2008), Fluid seepage at the continental margin offshore Costa Rica and southern Nicaragua, Geochem. Geophys. Geosyst., 9, Q05S05, doi:10.1029/2008GC001978.
67. Saito, S., and D. Goldberg (2001), Compaction and dewatering processes of the oceanic sediments in the Costa Rica and Barbados subduction zones: Estimates from in situ physical property measurements, Earth Planet. Sci. Lett., 191(3-4), 283-293, doi:10.1016/S0012-821X(01)00403-4. (Pubitemid 32974633)
68. Sano, Y., and B. Marty (1995), Origin of carbon in fumarolic gas from island arcs, Chem. Geol., 119(1-4), 265-274, doi:10.1016/0009-2541(94)00097-R.
69. Schmidt, M., C. Hensen, T. Morz, C. Muller, I. Grevemeyer, K. Wallmann, S. Mau, and N. Kaul (2005), Methane hydrate accumulation in "Mound 11" mud volcano, Costa Rica forearc, Mar. Geol., 216(1-2), 83-100, doi:10.1016/j.margeo. 2005.01.001.
70. Shaw, A. M., D. R. Hilton, T. P. Fischer, J. A. Walker, and G. E. Alvarado (2003), Contrasting He-C relationships in Nicaragua and Costa Rica: Insights into C cycling through subduction zones, Earth Planet. Sci. Lett., 214(3-4), 499-513, doi:10.1016/S0012-821X(03)00401-1. (Pubitemid 37172368)
71. Shipley, T. H., and G. F. Moore (1986), Sediment accretion, subduction, and dewatering at the base of the trench slope off Costa Rica: A seismic reflection view of the décollement, J. Geophys. Res., 91(B2), 2019-2028, doi:10.1029/ JB091iB02p02019.
72. Shipley, T. H., P. L. Stoffa, and D. F. Dean (1990), Underthrust sediments, fluid migration paths, and mud volcanoes associated with the accretionary wedge off Costa Rica: Middle America Trench, J. Geophys. Res., 95(B6), 8743-8752, doi:10.1029/JB095iB06p08743.
73. Simpson, H. J., and W. S. Broecker (1973), A new method for determining total carbonate ion concentration in saline waters, Limnol. Oceanogr., 18(3), 426-440.
74. Sinton, C. W., R. A. Duncan, and P. Denyer (1997), Nicoya Peninsula, Costa Rica: A single suite of Caribbean oceanic plateau magmas, J. Geophys. Res., 102(B7), 15,507-15,520, doi:10.1029/97JB00681.
75. Solomon, E. A., M. Kastner, H. Jannasch, G. Robertson, and Y. Weinstein (2008), Dynamic fluid flow and chemical fluxes associated with a seafloor gas hydrate deposit on the northern Gulf of Mexico slope, Earth Planet. Sci. Lett., 270(1-2), 95-105, doi:10.1016/j.epsl.2008.03.024.
76. Southward, A. J., E. C. Southward, P. R. Dando, G. H. Rau, H. Felbeck, and H. Flugel (1981), Bacterial symbionts and low 13C/12C Ratios in tissues of Pogonophora indicate unusual nutrition and metabolism, Nature, 293(5834), 616-620, doi:10.1038/293616a0.
77. Spinelli, G. A., and D. M. Saffer (2004), Along-strike variations in underthrust sediment dewatering on the Nicoya margin, Costa Rica related to the updip limit of seismicity, Geophys. Res. Lett., 31, L04613, doi:10.1029/ 2003GL018863.
78. Spinelli, G. A., and M. B. Underwood (2004), Character of sediments entering the Costa Rica subduction zone: Implications for partitioning of water along the plate interface, Isl. Arc, 13(3), 432-451, doi:10.1111/j.1440-1738. 2004.00436.x. (Pubitemid 39115612)
79. Tatsumi, Y., and S. Eggins (1995), Subduction Zone Magmatism, 211 pp., Blackwell Sci., Cambridge, Mass.
80. Trull, T. W., M. R. Perfit, and M. D. Kurz (1990), He and Sr isotopic constraints on subduction contributions to Woodlark Basin volcanism, Solomon Islands, Geochim. Cosmochim. Acta, 54(2), 441-453, doi:10.1016/0016-7037(90) 90332-F.
81. Tryon, M. D., and K. M. Brown (2001), Complex flow patterns through Hydrate Ridge and their impact on seep biota, Geophys. Res. Lett., 28(14), 2863-2866, doi:10.1029/ 2000GL012566. (Pubitemid 32784317)
82. Tryon, M. D., K. M. Brown, M. E. Torres, A. M. Trehu, J. McManus, and R. W. Collier (1999), Measurements of transience and downward fluid flow near episodic methane gas vents, Hydrate Ridge, Cascadia, Geology, 27(12), 1075-1078, doi:10.1130/0091-7613(1999)027<1075:MOTADF> 2.3.CO;2.
83. Tryon, M., K. Brown, L. R. Dorman, and A. Sauter (2001), A new benthic aqueous flux meter for very low to moderate discharge rates, Deep Sea Res., Part I, 48(9), 2121-2146, doi:10.1016/S0967-0637(01)00002-4. (Pubitemid 32589075)
84. Tryon, M. D., K. M. Brown, and M. E. Torres (2002), Fluid and chemical flux in and out of sediments hosting methane hydrate deposits on Hydrate Ridge, OR, II: Hydrological processes, Earth Planet. Sci. Lett., 201(3-4), 541-557, doi:10.1016/S0012-821X(02)00732-X.
85. Tryon, M., et al. (2006), Observations at forearc carbonate mounds offshore Costa Rica, Eos Trans. AGU, 87(52), Fall Meet. Suppl. Abstract V41B-1714.
86. Tryon, M., C. G. Wheat, and D. R. Hilton (2010), Fluid sources and pathways of the Costa Rica erosional convergent margin, Geochem. Geophys. Geosyst., doi:10.1029/ 2009GC002818, in press.
87. Umeda, K., Y. Ogawa, K. Asamori, and T. Oikawa (2006), Aqueous fluids derived from a subducting slab: Observed high 3He emanation and conductive anomaly in a non-volcanic region, Kii Peninsula southwest Japan, J. Volcanol. Geotherm. Res., 149(1-2), 47-61, doi:10.1016/j.jvolgeores.2005.06.005. (Pubitemid 43024611)
88. Umeda, K., G. F. McCrank, and A. Ninomiya (2007), Helium isotopes as geochemical indicators of a serpentinized forearc mantle wedge, J. Geophys. Res., 112, B10206, doi:10.1029/2007JB005031. (Pubitemid 350286427)
89. Vannucchi, P., and H. Tobin (2000), Deformation structures and implications for fluid flow at the Costa Rica convergent margin, ODP Sites 1040 and 1043, Leg 170, J. Struct. Geol., 22(8), 1087-1103, doi:10.1016/S0191- 8141(00)00027-4. (Pubitemid 30480514)
90. von Huene, R., C. R. Ranero, W. Weinrebe, and K. Hinz (2000), Quaternary convergent margin tectonics of Costa Rica, segmentation of the Cocos Plate, and Central American volcanism, Tectonics, 19(2), 314-334, doi:10.1029/ 1999TC001143.
91. Weiss, R. F. (1971), Solubility of helium and neon in water and seawater, J. Chem. Eng. Data, 16(2), 235-241, doi:10.1021/je60049a019.
92. Whiticar, M. J. (1999), Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane, Chem. Geol., 161(1-3), 291-314, doi:10.1016/S0009-2541(99) 00092-3.
93. Whiticar, M. J., and E. Faber (1986), Methane oxidation in sediment and water column environments-Isotope evidence, Org. Geochem., 10(4-6), 759-768.
94. Zimmer, M. M., T. P. Fischer, D. R. Hilton, G. E. Alvarado, Z. D. Sharp, and J. A. Walker (2004), Nitrogen systematics and gas fluxes of subduction zones: Insights from Costa Rica arc volatiles, Geochem. Geophys. Geosyst., 5, Q05J11, doi:10.1029/2003GC000651.