Research in Structural Geology & Tectonics

MARK Area - Mid-Atlantic Ridge

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Along-axis variations in magmatic construction and mechanical extension: "normal spreading to core complexes"

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Selected Recent Publications

http://www.nature.com/nature/links/010712/010712-1.html

Karson, J.A., Cannat, M., Miller, D.J., and Elthon, D., eds., 1997, Proceedings of the ODP, Scientific Results, v. 153, College Station, TX (Ocean Drilling Program), 577 pp.

Karson, J.A. and Lawrence, R.M., 1997, Tectonic Setting of Serpentinite Exposures on the Western Median Valley Wall of the MARK Area in the Vicinity of Site 920, in Karson, J.A., Cannat, M., Miller, D.J., and Elthon, D., eds., Proceedings of the ODP, Scientific Results, v. 153, College Station, TX (Ocean Drilling Program), 5-22.

Karson, J.A. and Lawrence, R.M., 1997, Tectonic Window into Gabbroic Rocks of the Middle Oceanic Crust in the MARK Area Near Sites 921-924, in Karson, J.A., Cannat, M., Miller, D.J., and Elthon, D., eds., Proceedings of the ODP, Scientific Results, v. 153, College Station, TX (Ocean Drilling Program), 61-76.

Karson, J.A., Cannat, M., and ODP Leg 153 Shipboard Scientific Party, 1997, Drilling Tectonic Windows into the Lower Crust and Upper Mantle: ODP Leg 153, JOIDES Journal, v. 23, p. 14-15.

Gao, D., S.D. Hurst, J.A. Karson, J.R. Delaney, and F.N. Spiess, Computer-aided interpretation of side-looking sonar images from the eastern intersection of the Mid-Atlantic Ridge with the Kane transform, J. Geophys. Res., 103, 20,997-21,014, 1998.

Karson, J.A., Fault rocks from the Mid-Atlantic Ridge, 24°N, in Fault-Related Rocks: A Photographic Atlas, edited by A.W. Snoke, J. Tullis and V.R. Todd, Princeton University Press, 194-197, 1998.

Karson, J.A., Internal structure of oceanic lithosphere: A perspective from tectonic windows, in Faulting and Magmatism at Mid-Ocean Ridges, edited by W.R. Buck, P.T. Delaney, J.A. Karson and Y. Lagabrielle, American Geophysical Union Geophysical Monograph 106, 177-218, 1998.

Lagabrielle, Y., D. Bideau, M. Cannat, J.A. Karson, and C. Mével, Ultramafic plutonic rocks exposed along the Mid-Atlantic Ridge (10°N-30°N): Symmetrical-asymmetrical distribution and implications for seafloor spreading processes, in Faulting and Magmatism at Mid-Ocean Ridges, edited by W.R. Buck, P.T. Delaney, J.A. Karson, and Y. Lagabrielle, American Geophysical Union, Geophysical Monograph 106, 153-176, 1998.

Lawrence, R.M., J.A. Karson, and S.D. Hurst, Dike orientations and fault-block rotations in slow-spread oceanic crust at the SMARK Area, Mid-Atlantic Ridge at 22°40'N, J. Geophys. Res., 103, 663-676, 1998.

Karson, J.A, Geological investigation of a lineated massif at the Kane transform: Implications for oceanic core complexes, Phil. Trans. Roy. Soc. Lond., 357, 713-740,1999.

Sturm, M., S. Goldstein, E.M. Klein, J.A. Karson, and M.T. Murrell, Uranium-series age constraints on lavas from the axial valley of the Mid-Atlantic Ridge, MARK Area, Earth Planet. Sci. Lett., 181, 61-70, 2000.

Blackman, D.K., D.S. Kelley, J.A. Karson and Shipboard Scientific Party, Seafloor Mapping and Sampling of the MAR 30°N Oceanic Core Complex-MARVEL (Mid-Atlantic Ridge Vents in Extending Lithosphere) 2000, InterRidge Newsletter, 10, 33-36, 2001.

Kelley, D.S., J.A. Karson, D.K. Blackman, G.L. Früh-Green, D.A. Butterfield, M.D. Lilley, E.J. Olson, M.O. Schrenk, K.K. Roe, G.T. Lebon, P.A. Rivizzigno and the AT3-60 Shipboard Party, An off-axis hydrothermal vent field near the Mid-Atlantic Ridge at 30° N, Nature, 412, 145-149, 2001.

Kelley, D., Karson J, J., Blackman, D., Früh-Green, G., Butterfield, D., Lilley, M., Schrenk, M., Olson, E., Roe, K., Lebon, J., and Shipboard Scientific Party, Discovery of Lost City: An off-axis, peridotite-hosted, hydrothermal field near 30°N on the Mid-Atlantic Ridge, RIDGE Events Newsletter, 11, 3-9, 2001.

Lawrence, R.M., J.A. Karson, and J. Gee, Magnetic anisotropy of serpentinized peridotites from the MARK Area: Implications for the orientation of mesoscopic structures and major fault zones, J. Geophys. Res., in press, 2001.

Meurer, W.P., M. Sturm, E.M. Klein, and J.A. Karson, Basalt compositions from the Mid-Atlantic Ridge at the SMARK area (22°30’N to 22°50’N)–Implications for parental liquid variability at isotopically homogeneous spreading centers, Earth Planet. Sci. Lett., 186, 451-469, 2001.