Aeolian sediment flux from sea ice into Southern McMurdo Sound, Antarctica

Atkins, Cliff; Dunbar, Gavin B.

doi:10.1016/j.gloplacha.2009.04.006

Cited by 66 publications

(113 citation statements)

References 33 publications

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“…Larger clasts, including lava blocks, are present in areas of dirty ice on the McMurdo Ice Shelf (Figure 1b). In accordance with the findings of Atkins and Dunbar (2009), some of the quartz grains and other fine-grained non-volcanic components in LSU 1 might be from aeolian sediments originally deposited on sea ice.…”

Section: Evidence For Local Volcanic Sourcessupporting

confidence: 87%

“…The paucity of extrabasinal sediments suggests a significant decrease in extrabasinal erosional activity in the area during the middle-late Pleistocene, perhaps because the area was covered by glaciers frozen to their base (Figure 15). A significant amount of aeolian sediment deposited on the seaice around the drill-site has been documented by Atkins and Dunbar (2009) and consists of clay-sized to very coarse sand-sized particles that include highly angular volcanic grains, as well as well-rounded quartz grains. Larger clasts, including lava blocks, are present in areas of dirty ice on the McMurdo Ice Shelf (Figure 1b).…”

Section: Evidence For Local Volcanic Sourcesmentioning

confidence: 99%

“…Compositionally, these beds show the widest range in clast types and are more likely to contain basement materials. These were very likely brought in by aeolian processes to the sea ice surface (Atkins and Dunbar, 2009), deposited when melted and then mixed by the sediment gravity flows with the more proximal volcanic sediment.…”

Section: Evidence For Shallow Water Depths From Other Sedimentary Strmentioning

confidence: 99%

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The upper lithostratigraphic unit of ANDRILL AND-2A core (Southern McMurdo Sound, Antarctica): Local Pleistocene volcanic sources, paleoenvironmental implications and subsidence in the southern Victoria Land Basin

Carlo¹,

Panter²,

Bassett³

et al. 2009

Global and Planetary Change

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Section: Evidence For Local Volcanic Sourcessupporting

confidence: 87%

Section: Evidence For Local Volcanic Sourcesmentioning

confidence: 99%

Section: Evidence For Shallow Water Depths From Other Sedimentary Strmentioning

confidence: 99%

See 1 more Smart Citation

The upper lithostratigraphic unit of ANDRILL AND-2A core (Southern McMurdo Sound, Antarctica): Local Pleistocene volcanic sources, paleoenvironmental implications and subsidence in the southern Victoria Land Basin

Carlo¹,

Panter²,

Bassett³

et al. 2009

Global and Planetary Change

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“…On the basis of these considerations, data presented here, suggest that the seafloor was influenced by aeolian particles that have settled through the water column, at the time of diatomite deposition. Consistently, sediment blown onto the sea ice and released to the water column during the melting has long been suggested as the dominant source of modern lithogenic sediment in McMurdo Sound (Bentley, 1979;Barrett et al, 1983;Macpherson, 1987;Atkins and Dunbar, 2009;Dunbar et al, 2009). Moreover, increases of Ti/Al ratios within two intervals at 400-425 and 440-460 mbsf (Fig.…”

Section: Element Geochemistrymentioning

confidence: 81%

Chemostratigraphy of the early Pliocene diatomite interval from MIS AND-1B core (Antarctica): Palaeoenvironment implications

Scopelliti

Bellanca

Monien

et al. 2013

Global and Planetary Change

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The AND-1B drill core (1285 m-long) was recovered, inside the ANDRILL (ANtarctic geological DRILLing) Program, during the austral summer of 2006/07 from beneath the floating McMurdo Ice Shelf. Drilling recovered a stratigraphic succession of alternating diamictites, diatomites and volcaniclastic sediments spanning about the last 14 Ma. A core portion between 350 and 480 mbsf, including a 80 m-thick diatomite interval recording the early Pliocene warming event, was investigated in term of opal biogenic content and element geochemistry. Across the diatomite interval, in spite of the lithological uniformity, a fluctuating biogenic opal profile mirrors the δ 18O record, testifying a decrease in productivity when temperature drops as a consequence of small glacial fluctuations. The comparison of biogenic opal data with Chaetoceros spp. abundances from Konfirst et al. (2012) documents alternations between periods of high primary productivity in stratified surface waters and of enhanced terrigenous input in ice-free conditions. Cluster analysis discriminates elements associated to terrigenous input from those subject to biogenic control. Further separation in sub-cluster was interpreted in term of different element response to changes in provenance but also to depositional/early diagenetic conditions at the seafloor. Whilst K and Ti are related to different sediment sources confirming previous studies from the same interval, V, Zn and, to a lesser extent, Fe, document reducing/anoxic conditions during the diatomites deposition (in particular in 400-460 mbsf interval). Mg, Sr and Mn contents are related to authigenic carbonate precipitation whilst Ba is interested by nonsteady-state processes leading to local peaks of barium below the sulphate-rich/sulphate-poor pore water boundary where generally the low degree of barite saturation is responsible for Ba remobilization. Such alteration in depositional dynamics, responsible of the precipitation of an oxygen-depleted barium phase, was probably induced by change in sedimentation rate and/or in palaeoenvironmental conditions.

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“…This material may have fertilized the upper waters, stimulating algal production; the grains may have then become bound by algae either in the water column or on the seafloor (see Gabbott et al 2010). However, there are a number of significantly larger grains (100 -150 µm) within clusters and it is possible that this size fraction was blown across seasonal sea ice: a similar process occurs today on the McMurdo Ice Shelf, Antarctica (see Atkins & Dunbar, 2009 …”

Section: Box 1 the Soom Shale Member Sedimentmentioning

confidence: 98%

The late Ordovician Soom Shale Lagerstätte: an extraordinary post-glacial fossil and sedimentary record

Gabbott

Browning

Theron

et al. 2016

JGS

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Fossils of the Late Ordovician Soom Shale Lagerstätte are characterized by exceptional preservation of their soft tissues in clay minerals. The low-diversity community lived in an unusual cold-water setting, dominated by anoxic bottom waters, in the immediate aftermath of the Hirnantian glaciation. Giant conodonts represented by complete tooth sets, and one with trunk musculature and liver preserved, unarmoured jawless fish, lobopods and enigmatic taxa are some of the more important fossils. Furthermore, this Lagerstätte also preserves biomineralized Ordovician taxa such as brachiopods, orthoconic nautiloids and trilobites. It is important in capturing the only known examples of many taxa, extending temporal ranges of others and providing a unique glimpse of a post-glacial refugium, at a time when other Lagerstätten are unknown.

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Aeolian sediment flux from sea ice into Southern McMurdo Sound, Antarctica

Cited by 66 publications

References 33 publications

The upper lithostratigraphic unit of ANDRILL AND-2A core (Southern McMurdo Sound, Antarctica): Local Pleistocene volcanic sources, paleoenvironmental implications and subsidence in the southern Victoria Land Basin

The upper lithostratigraphic unit of ANDRILL AND-2A core (Southern McMurdo Sound, Antarctica): Local Pleistocene volcanic sources, paleoenvironmental implications and subsidence in the southern Victoria Land Basin

Chemostratigraphy of the early Pliocene diatomite interval from MIS AND-1B core (Antarctica): Palaeoenvironment implications

The late Ordovician Soom Shale Lagerstätte: an extraordinary post-glacial fossil and sedimentary record

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