Microseismicity of the ultraslow-spreading Gakkel ridge, Arctic Ocean: A pilot study

Geophysical Journal International

Volumn 169, Issue 1, 2007, Pages 100-112

  Schlindwein, Vera ^a   Müller, Christian ^a,b   Jokat, Wilfried ^a  

^a ALFRED WEGENER INSTITUTE FOR POLAR AND MARINE RESEARCH   (Germany)

^b FIELAX Gesellschaft fur wissenschaftliche Datenverarbeitung mbH   (Germany)

Author keywords

Earthquake location; Microseismicity; Mid ocean ridge; Seafloor spreading; Seismic array; Seismotectonics

Indexed keywords

EARTHQUAKE MAGNITUDE; ICE COVER; MAGMATISM; MICROEARTHQUAKE; MID-OCEAN RIDGE; SEAFLOOR SPREADING; SEISMICITY; SEISMOGRAPH; SEISMOTECTONICS; SPREADING CENTER;

ARCTIC OCEAN; EURASIAN BASIN; GAKKEL RIDGE;

EID: 34147138977     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2006.03308.x     Document Type: Article

References (28)

1. Baker, E.T. et al., 2004. Hydrothermal venting in magma deserts: The ultraslow-spreading Gakkel and Southwest Indian Ridges, Geochem. Geophys. Geosyst., 5, Q08002, doi:.
2. Bown, J.W. & White, R.S., 1994. Variation with spreading rate of oceanic crustal thickness and geochemistry, Earth planet. Sci. Lett., 121, 435-449.
3. Capon, J., 1969. High-resolution frequency-wavenumber spectrum analysis, Proc. IEEE, 57, 1408-1418.
4. Coackley, B.J. & Cochran, J.R., 1998. Gravity evidence of very thin crust at the Gakkel Ridge (Arctic Ocean), Earth planet. Sci. Lett., 162, 81-95.
5. Cochran, J.R., Kurras, G.J., Edwards, M.H. & Coackley, B.J., 2003. The Gakkel Ridge: Bathymetry, gravity anomalies, and crustal accretion at extremely slow spreading rates, J. geophys. Res., 108 (B2), 2116, doi:.
6. Dick, H.J.B., Lin, J. & Schouten, H., 2003. An ultraslow-spreading class of ocean ridge, Nature, 426, 405-412.
7. Edmonds, H.N. et al., 2003. Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel Ridge in the Arctic Ocean, Nature, 421, 252-256.
8. Edwards, M.H., Kurras, G.J., Tolstoy, M., Bohnenstiehl, D.R., Coackley, B.J. & Cochran, J.R., 2001. Evidence of recent volcanic activity on the ultraslow-spreading Gakkel Ridge, Nature, 409, 808-812.
9. Engen, Ø., Eldholm, O. & Bungum, H., 2003. The Arctic plate boundary, J. geophys. Res., 108 (B2), 2075, doi:.
10. International Seismological Centre, 2001. On-line Bulletin, http://www.isc.ac.uk/Bull, Internatl. Seis. Cent., Thatcham, United Kingdom.
11. Jakobsson, M., Cherkis, N.Z., Woodward, J., Macnab, R. & Coackley, B., 2000. New grid of Arctic bathymetry aids scientists and mapmakers, EOS, Trans. Am. geophys. Un., 81, 89, 93-96.
12. Jokat, W. & Micksch, U., 2004. Sedimentary structure of the Nansen and Amundsen basins, Arctic Ocean, Geophys. Res. Lett., 31, L02603, doi:.
13. Jokat, W. & Schmidt-Aursch, M.C., 2007. Geophysical characteristics of the ultra-slow spreading Gakkel Ridge, Arctic Ocean, Geophys. J. Int., in press.
14. Jokat, W., Ritzmann, O., Schmidt-Aursch, M.C., Drachev, S., Gauger, S. & Snow, J., 2003. Geophysical evidence for reduced melt production on the Arctic ultraslow Gakkel mid-ocean ridge, Nature, 423, 962-965.
15. Kristoffersen, Y., 1990. Eurasia Basin, in The Geology of North America, Vol. L, The Arctic Ocean Region, pp. 365-378, eds Grantz, A., Johnson, L. & Sweeney, J. F., Geol. Soc. Am., Boulder, Colorado.
16. Kristoffersen, Y., Husebye, E.S., Bungum, H. & Gregersen, S., 1982. Seismic investigations of the Nansen ridge during the Fram I experiment, Tectonophysics, 82, 57-68.
17. Michael, P.J. et al., 2003. Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel Ridge, Arctic Ocean, Nature, 423, 956-961.
18. Müller, C. & Jokat, W., 2000. Seismic evidence for volcanic activity discovered in Central Arctic, EOS, Trans. Am. geophys. Un., 81 (24), 265-269.
19. Rogenhagen, J. & Jokat, W., 2000. The sedimentary structure in the western Weddell Sea, Mar. Geol., 128, 45-60.
20. Schlindwein, V., Müller, C. & Jokat, W., 2005. Seismoacoustic evidence for volcanic activity on the ultraslow-spreading Gakkel Ridge, Arctic Ocean, Geophys. Res. Lett., 32, L18306, doi:.
21. Schweitzer, J., 2001. HYPOSAT - An enhanced routine to locate seismic events, Pure appl. geophys., 158, 277-289.
22. Sella, G.F., Dixon, T.H. & Mao, A., 2002. REVEL: A model for recent plate velocities from space geodesy, J. geophys. Res., 107 (B4), 2081, doi:.
23. Sohn, R.A. & Hildebrand, J.A., 2001. Hydroacoustic earthquake detection in the Arctic Basin with the Spinnaker Array, Bull. seism. Soc. Am., 91 (3), 572-579.
24. Sohn, R.A., Hildebrand, J.A. & Webb, S.C., 1999. A microearthquake survey of the high-temperature vent fields on the volcanically active East Pacific Rise (9°50′N), J. geophys. Res., 104 (B11), 25367-25377.
25. Sohn, R.A., Barclay, A.H. & Webb, S.C., 2004. Microearthquake patterns following the 1998 eruption of Axial Volcano, Juan de Fuca Ridge: Mechanical relaxation and thermal strain, J. geophys. Res., 109, B01101, doi:.
26. Thiede, J. & the shipboard scientific party, 2002. Cruise Report: AMORE2001, Rep. Polar Mar. Res., 421, 397 pp.
27. Tolstoy, M., Bohnenstiehl, D.R., Edwards, M.H. & Kurras, G.J., 2001. Seismic character of volcanic activity at the ultraslow-spreading Gakkel Ridge, Geology, 29, 1139-1142.
28. Toomey, D.R., Solomon, S.C., Purdy, G.M. & Murray, M.H., 1985. Microearthquakes beneath the median valley of the Mid-Atlantic Ridge near 23°N: Hypocenters and focal mechanisms, J. geophys. Res., 90 (B7), 5443-5458.