Proc. IODP, 304/305, Data report: spatial and temporal evolution of slow spread oceanic crust—graphic sections of core recovered from IODP Hole U1309D, Atlantis Massif, 30°N, MAR (including Pb/U zircon geochronology and magnetic remanence data)

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Chapter contents Abstract Introduction Methods Core description and graphic logs Magnetic methods and data Pb/U zircon geochronology methods and data Summary Acknowledgments References Figure F1. Location map of Hole U1309D. PDF file			Previous \| Next doi:10.2204/iodp.proc.304305.205.2009 Data report: spatial and temporal evolution of slow spread oceanic crust—graphic sections of core recovered from IODP Hole U1309D, Atlantis Massif, 30°N, MAR (including Pb/U zircon geochronology and magnetic remanence data)¹ Barbara E. John,² Michael J. Cheadle,² Jeffrey S. Gee,³ Craig B. Grimes,⁴ Antony Morris,⁵ and Nicola Pressling⁶ Abstract This contribution presents a graphical downhole log for core recovered from Integrated Ocean Drilling Program (IODP) Hole U1309D made during postcruise study at the Bremen Core Repository. More than 3500 observations of the rock composition and structural relations are presented, including igneous composition, texture and grain size variations, layering and intrusive contact orientation, and younger/older intrusive relations, together with observations of fault/shear zone thickness and orientation and alteration mineral assemblages. In addition, remanence components for 523 new specimens are shown along with shipboard magnetic susceptibility and 18 Pb/U zircon ages from evolved Fe-Ti oxide gabbro and felsic dikes from Hole U1309D. This compilation is a resource for researchers interested in the composition, construction, and deformation of slow-spreading gabbroic crust, in particular the scale/thickness of intrusive bodies and the order of intrusion. ¹John, B.E., Cheadle, M.J., Gee, J.S., Grimes, C.B., Morris, A., and Pressling, N., 2009. Data report: spatial and temporal evolution of slow spread oceanic crust—graphic sections of core recovered from IODP Hole U1309D, Atlantis Massif, 30°N, MAR (including Pb/U zircon geochronology and magnetic remanence data). In Blackman, D.K., Ildefonse, B., John, B.E., Ohara, Y., Miller, D.J., MacLeod, C.J., and the Expedition 304/305 Scientists, Proc. IODP, 304/305: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.304305.205.2009 ²Department of Geology and Geophysics, University of Wyoming, Laramie WY 82071, USA. Correspondence author: bjohn@uwyo.edu ³Scripps Institution of Oceanography, University of California, San Diego, La Jolla CA 92093, USA. ⁴Department of Geosciences, Mississippi State University, Mississippi State MS 39762-5448, USA. ⁵School of Earth, Ocean, and Environmental Sciences, University of Plymouth, Plymouth PL4 8AA, UK. ⁶National Oceanography Centre Southampton, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK. Initial receipt: 15 June 2009 Acceptance: 13 October 2009 Publication: 21 December 2009 MS 304305-205 Top of page \| Previous \| Next