Sedimentary regimes at the Macquarie Ridge Complex: interaction of Southern Ocean circulation and plate boundary bathymetry

• Published in: Paleoceanography
• Main Authors: Schuur, CL, Coffin, MF, Frohlich, C, Massell, CG, Karner, GD, Ramsay, D, Caress, DW
• Format: Article in Journal/Newspaper
• Language: English
• Published: Amer Geophysical Union 1998
• Subjects: Earth Sciences; Geology; Marine Geoscience; Southern Ocean
• Online Access: https://doi.org/10.1029/98PA02357; http://ecite.utas.edu.au/73877

Seafloors tructurea t the MacquarieR idgeC omplexs tronglyin fluencesth e intensitya nd circulationp atternof oceanc urrentss outho f New Zealand.N ew marineg eophysicadl atas howh eterogeneousse dimentareyn vironmentson Macquaries eafloorth atr eflecti nteractiono f highlyv ariableb athymetryw ith theA ntarcticC ircumpolaCr urrenta ndnorthf lowingA ntarcticB ottomW ater.A cousticb ackscattebr,a thymetrya, nd seismicr eflectiond atac ollecteda boardR/V Rig Seismicin 1994 showf ive bathymetricallcyo nstrainesde dimentarpyr ovincesfl ankingt he ridge complex:( 1)northwestM acquarie hemipelagicd rifts, (2) current-modifiedS olanders ubmarinef an complex, (3) southwestMacquariem anganesneo dulep rovince,( 4) EmeraldB asinp elagicd rift province,a nd (5) sediment-freoe ceanicc rustrelatedt o the 53.5Sp assagein the MacquarieR idgeC omplexT. he lateM iocene-Pliocenoep eningo f a 53.5Sp assagein the ridge complexc auseda major increasein the intensityo f oceanc urrentc irculations, edimentr eworking,a nderosioni n all sedimentaryp rovinces.