Late quaternary ice-rafted detritus events in the Chukchi Basin, western Arctic Ocean

Wang, Rujian; Wei, Xiao; Li, Wenbao; Sun, Yaru

doi:10.1007/s11434-009-0424-8

Cited by 11 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, deposits similar to fine-grained turbidites, attributed to MIS 4/lower MIS 3, have been recovered from the Northwind and Chukchi basins, affected by glacigenic inputs from the Chukchi and East Siberian margins, respectively (Polyak et al, 2007;Matthiessen et al, 2010;Wang et al, 2013). In the Chukchi Basin this unit, correlative to a much thinner MIS 4 interval in core BN05, is characterized by a high content of fine silt with a peaky downcore distribution (Wang et al, 2010(Wang et al, , 2013.…”

Section: Grain Size and Depositional Processesmentioning

confidence: 98%

Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history

et al. 2017

View full text Add to dashboard Cite

Sediment core ARC4-BN05 collected from the Canada Basin, Arctic Ocean, covers the late to middle Quaternary (Marine Isotope Stage -MIS -1-15, ca. 0.5-0.6 Ma) as estimated by correlation to earlier proposed Arctic Ocean stratigraphies and AMS 14 C dating of the youngest sediments. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktic foraminiferal numbers in core ARC4-BN05 provides important new information about sedimentary environments and provenance. We use increased contents of coarse debris as an indicator of glacier collapse events at the margins of the western Arctic Ocean, and identify the provenance of these events from mineralogical composition. Notably, peaks of dolomite debris, including large dropstones, track the Laurentide Ice Sheet (LIS) discharge events to the Arctic Ocean. Major LIS inputs occurred during the stratigraphic intervals estimated as MIS 3, intra-MIS 5 and 7 events, MIS 8, and MIS 10. Inputs from the East Siberian Ice Sheet (ESIS) are inferred from peaks of smectite, kaolinite, and chlorite associated with coarse sediment. Major ESIS sedimentary events occurred in the intervals estimated as MIS 4, MIS 6 and MIS 12. Differences in LIS vs. ESIS inputs can be explained by ice-sheet configurations at different sea levels, sediment delivery mechanisms (iceberg rafting, suspension plumes, and debris flows), and surface circulation. A longterm change in the pattern of sediment inputs, with an apparent step change near the estimated MIS 7-8 boundary (ca. 0.25 Ma), presumably indicates an overall glacial expan-sion at the western Arctic margins, especially in North America.

show abstract

Section: Grain Size and Depositional Processesmentioning

confidence: 98%

Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Glacial diamictons are broadly found in the sediments across the Ross Sea (Domack et al, 1999), mainly containing terrigenous fine silt and clay, biogenic siliceous materials, and IRDs (Anderson et al, 1984). The sand component (grain-size > 63 μm) is commonly used as an indicator of IRD (Reimnitz et al, 1998;Wang et al, 2009), for which the seasonal sea ice carries relatively finer particles (<250 μm) and large ice chunks and icebergs transport coarser ones (>250 μm) (Darby and Paula, 2008;Phillips and Grantz, 2010). Combining the IRD data and lithological characteristics, the core ANT32-RA05C can be divided into three sections (Figure 2) and described as follows.…”

Section: Ird Changesmentioning

confidence: 99%

“…Dating sediments in polar seas is much more difficult than that in other areas (Wang et al, 2009), and an integrated result of various dating methods is commonly used. According to an average sedimentation rate of 1.37 cm/kyr from the 230 Th method, the bottom age of the core ANT32-RA05C is about 200 ka, offering a preliminary constraint for RPIs.…”

Section: Establishing the Age Modelmentioning

confidence: 99%

“…As an important proxy of iceberg drift and ice sheet evolution, IRD has been broadly used in the palaeoceanographic research in the Arctic and Antarctic regions (Darby and Paula, 2008;Wang et al, 2009), representing a climatic transition from cold to warm. In the core ANT32-RA05C, three intervals with evident IRDs are recognized: 29-32 ka, 15-17 ka, and 5 ka to present.…”

Section: Paleoenvironmental Processesmentioning

confidence: 99%

See 1 more Smart Citation

Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica

Bu¹,

Long²,

Hu³

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

The palaeoceanographic studies are largely limited by poor carbonate preservation in high-latitude regions. To improve our knowledge in this key area, we studied a sediment core (ANT32-RA05C) in terms of paleomagnetic and 230Th dating and geochemical properties, collected from the continental slope of the Ross Sea, Antarctica. The two major results are as follows: 1) the sedimentation rate based on 230Th isotopes is 1.37 cm/kyr, agreeing well with the correlation of the relative paleomagnetic intensity of the core ANT32-RA05C to changes in Earth’s magnetic intensity and 2) the sediments contain ice-rafted debris (IRD) over 30%, with a considerable contribution of siliceous deposits. Integrating geochronological and geochemical properties of the studied core, a correlation of the regional paleoenvironmental process to the EPICA Dome C (EDC) Antarctic temperature is established, inferring that the IRD input and primary productivity are both enhanced in a warm climate. Moreover, a leading phase of biogenic processes to changes in the ice sheet in the Ross Ice Shelf is observed, highlighting a dominant role of the oceanic circulation in the ice-sheet retreat during the last deglaciation. Overall, the sedimentary record in the Ross Sea documents some key features of the paleoenvironmental processes in the Late Pleistocene, which could be correlated with large-scale changes in Antarctica and thus are worthy of further investigation in the future.

show abstract

Paleoceanographic records in the Chukchi Basin, western Arctic Ocean during the late Quaternary

et al. 2012

View full text Add to dashboard Cite

Late quaternary ice-rafted detritus events in the Chukchi Basin, western Arctic Ocean

Cited by 11 publications

References 42 publications

Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history

Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history

Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica

Paleoceanographic records in the Chukchi Basin, western Arctic Ocean during the late Quaternary

Contact Info

Product

Resources

About