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 Summary We present graphical downhole logs/core description for all core recovered from IODP Hole U1309D in columns representing intervals of 15 m. 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. Single or multiple components of magnetic remanence for 523 specimens are shown together with shipboard magnetic susceptibility measurements 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 intrusive history. Top of page \| Previous \| Next

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