A revised Early Miocene age for the instigation of the Eirik Drift, offshore southern Greenland: Evidence from high-resolution seismic reflection data

Müller-Michaelis, Antje; Uenzelmann-Neben, Gabriele; Stein, Rüdiger

doi:10.1016/j.margeo.2013.04.012

Cited by 47 publications

(43 citation statements)

References 39 publications

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“…3-5;Müller-Michaelis et al, 2013). The basement shows a high in the NE and the deepest part of the horizon can be observed in the west (Fig.…”

Section: Basementmentioning

confidence: 90%

“…For this study of the development of the WBUC we applied the seismostratigraphic concept of Müller-Michaelis et al (2013) and tracked the seismic horizons. Please note that our grid of seismic reflection data is not uniform (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Active sea-floor spreading ceased $ 35 Ma ago (Srivastava and Roest, 1999). Approximately (Smith and Sandwell, (1997)) including basins, ridges, sediment drifts and prevailing deep-current system of the North Atlantic Ocean (modified from Müller-Michaelis et al, (2013); sediment drifts after Faugères et al, (1999)). The present Western Boundary Undercurrent (WBUC) at Eirik Drift transports Denmark Strait Overflow Water (DSOW), Iceland-Scotland Overflow Water (ISOW), Lower Deep Water (LDW; also: modified Antarctic Bottom Water AABW) and Labrador Sea Water (LSW) (modified from Schmitz, 1996).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…2). Data processing and the correlation of the age model of ODP Site 646 to the seismic data are described in detail in Müller-Michaelis et al (2013). The revised seismostratigraphic concept for Eirik Drift and the detailed investigation of seismic unit SUIV are only briefly described here in order not to repeat the detailed discussion presented there.…”

Section: Seismostratigraphymentioning

confidence: 99%

“…1). Eirik Drift south of Greenland is a sediment drift lying directly under the pathway of the present WBUC Hunter et al, 2007a;Müller-Michaelis et al, 2013;Wold, 1994). Here, we investigate the sedimentary architecture of Eirik Drift to better understand the development of the ancient WBUC.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Development of the Western Boundary Undercurrent at Eirik Drift related to changing climate since the early Miocene

Müller-Michaelis

Uenzelmann-Neben

2014

Deep Sea Research Part I: Oceanographic Research Papers

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“…3-5;Müller-Michaelis et al, 2013). The basement shows a high in the NE and the deepest part of the horizon can be observed in the west (Fig.…”

Section: Basementmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Geological Backgroundmentioning

confidence: 99%

Section: Seismostratigraphymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of the Western Boundary Undercurrent at Eirik Drift related to changing climate since the early Miocene

Müller-Michaelis

Uenzelmann-Neben

2014

Deep Sea Research Part I: Oceanographic Research Papers

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Phosphorites, Co‐rich Mn nodules, and Fe‐Mn crusts from Galicia Bank, NE Atlantic: Reflections of Cenozoic tectonics and paleoceanography

González

Somoza

Hein

et al. 2016

Geochem Geophys Geosyst

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A wide variety of marine mineral deposits were recovered from 750 to 1400 m water depths on Galicia Bank, Iberian margin. Mineral deposits include: (1) carbonate fluorapatite phosphorite slabs and nodules that replaced limestone and preserved original protolith fabric. (2) Ferromanganese vernadite crusts with high Mn and Fe (Mn/Fe = 1) contents, and thick stratabound layers consisting mainly of Mn (up to 27% MnO) and Fe (15% Fe2O3), which impregnated and replaced the phosphorite. (3) Co‐rich Mn nodules are composed of romanechite and todorokite laminae. Mn‐rich layers (up to 58% MnO) contain up to 1.8% Co. (4) Goethite nodules with Fe up to 67% Fe2O3 have low Mn and trace metals. We interpret this mineralization paragenesis to be related to major changes in oceanographic and tectonic regimes. Three phosphatization generations formed hardgrounds dated by 87Sr/86Sr isotopes as late Oligocene, early Miocene, and latest early Miocene. During the latest early Miocene, the hardground was fractured and breached due to regional intraplate tectonism, which was coeval with a widespread regional erosional unconformity. The stratabound layers and Co‐rich manganese nodules were derived from low‐temperature geothermally driven hydrothermal fluids, with fluid conduits along reactivated faults. During middle and late Miocene, the introduction of vigorous deep water flow from the Arctic generated growth of hydrogenetic ferromanganese crusts. Finally, growth of diagenetic Fe‐rich nodules (late Pliocene) was promoted by the introduction of hypersaline Mediterranean Outflow Water into the Atlantic Ocean.

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Architecture of North Atlantic contourite drifts modified by transient circulation of the Icelandic mantle plume

Parnell‐Turner

White

McCave

et al. 2015

Geochem Geophys Geosyst

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Overflow of Northern Component Water, the precursor of North Atlantic Deep Water, appears to have varied during Neogene times. It has been suggested that this variation is moderated by transient behavior of the Icelandic mantle plume, which has influenced North Atlantic bathymetry through time. Thus pathways and intensities of bottom currents that control deposition of contourite drifts could be affected by mantle processes. Here, we present regional seismic reflection profiles that cross sedimentary accumulations (Bj€ orn, Gardar, Eirik, and Hatton Drifts). Prominent reflections were mapped and calibrated using a combination of boreholes and legacy seismic profiles. Interpreted seismic profiles were used to reconstruct solid sedimentation rates. Bj€ orn Drift began to accumulate in late Miocene times. Its average sedimentation rate decreased at 2.5 Ma and increased again at 0.75 Ma. In contrast, Eirik Drift started to accumulate in early Miocene times. Its average sedimentation rate increased at 5.5 Ma and decreased at 2.2 Ma. In both cases, there is a good correlation between sedimentation rates, inferred Northern Component Water overflow, and the variation of Icelandic plume temperature independently obtained from the geometry of diachronous V-shaped ridges. Between 5.5 and 2.5 Ma, the plume cooled, which probably caused subsidence of the Greenland-Iceland-Scotland Ridge, allowing drift accumulation to increase. When the plume became hotter at 2.5 Ma, drift accumulation rate fell. We infer that deep-water current strength is modulated by fluctuating dynamic support of the Greenland-Scotland Ridge. Our results highlight the potential link between mantle convective processes and ocean circulation.

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A revised Early Miocene age for the instigation of the Eirik Drift, offshore southern Greenland: Evidence from high-resolution seismic reflection data

Cited by 47 publications

References 39 publications

Development of the Western Boundary Undercurrent at Eirik Drift related to changing climate since the early Miocene

Development of the Western Boundary Undercurrent at Eirik Drift related to changing climate since the early Miocene

Phosphorites, Co‐rich Mn nodules, and Fe‐Mn crusts from Galicia Bank, NE Atlantic: Reflections of Cenozoic tectonics and paleoceanography

Architecture of North Atlantic contourite drifts modified by transient circulation of the Icelandic mantle plume

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