Geochemistry of basalts from ODP Leg 49, North Atlantic Ocean ...

• Main Authors: Tarney, J, Saunders, Andrew D, Weaver, Stephen D, Donnellan, Nigel CB, Hendry, Graham L
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1979
• Subjects: Drilling/drill rig; Leg49; Glomar Challenger; Deep Sea Drilling Project DSDP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.710816; https://doi.pangaea.de/10.1594/PANGAEA.710816

The geochemistry of basalts recovered from seven sites in the North Atlantic is described with particular reference to minor elements. Three sites (407, 408, and 409) along the same mantle flow line, transverse to the Reykjanes Ridge at about 63°N, provide information on the composition of basalts erupted over a 34-m.y. interval between 2.3 and 36 m.y. ago. At Site 410, at 45°N, penetration into 10 m.y.-old crust west of the ridge axis permits comparisons with young basalts dredged from the median valley at 45°N. Three sites in the FAMOUS area at about 36°N provided material from very young (1 m.y.) basaltic crust (Site 411), and material to test the geochemical coherence of basalts of different ages (1.5 and 3.5 m.y.) on either side of a fracture zone (Sites 412 and 413). These sites complement earlier data from dredged and drilled sites (Leg 37) in the FAMOUS area.At Site 407, four geochemically distinct basalt units occur, with different normative and rare-earth element (REE) characteristics, and there is ... : Supplement to: Tarney, J; Saunders, Andrew D; Weaver, Stephen D; Donnellan, Nigel CB; Hendry, Graham L (1979): Minor-element geochemistry of basalts from Leg 48, North Atlantic Ocean. In: Luyendyk, B.P., Cann, J.R., et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 49, 657-691 ...