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

journal contribution
posted on 2023-05-17, 08:47 authored by Schuur, CL, Mike CoffinMike Coffin, Frohlich, C, Massell, CG, Karner, GD, Ramsay, D, Caress, DW
Seafloors tructurea t the MacquarieR idgeC omplexs tronglyin fluencesth e intensitya nd circulationp attern of oceanc urrentss outho f New Zealand.N ew marineg eophysicadl atas howh eterogeneousse dimentareyn vironments on Macquaries eafloorth atr eflecti nteractiono f highlyv ariableb athymetryw ith theA ntarcticC ircumpolaCr urrenta nd northf lowingA ntarcticB ottomW ater.A cousticb ackscattebr,a thymetrya, nd seismicr eflectiond atac ollecteda board R/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) southwest Macquariem anganesneo dulep rovince,( 4) EmeraldB asinp elagicd rift province,a nd (5) sediment-freoe ceanicc rust relatedt o the 53.5øSp assagein the MacquarieR idgeC omplexT. he lateM iocene-Pliocenoep eningo f a 53.5øSp assage in the ridge complexc auseda major increasein the intensityo f oceanc urrentc irculations, edimentr eworking,a nd erosioni n all sedimentaryp rovinces.

History

Publication title

Paleoceanography

Volume

13

Issue

6

Pagination

646-670

ISSN

0883-8305

Department/School

Institute for Marine and Antarctic Studies

Publisher

Amer Geophysical Union

Place of publication

2000 Florida Ave Nw, Washington, USA, Dc, 20009

Rights statement

Copyright © 1998 American Geophysical Union

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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