The sedimentology of Holocene Prydz Bay : sedimentary patterns and processes ...
Material being deposited in Prydz Bay is glaciogenic, aeolian, and biogenic. Terrigenous material is entrained by basal glacial erosion and introduced to the sea via iceberg rafting, meltout, and rollover in the periphery of Prydz Bay where iceberg drift tracks are determined by ocean currents. It a...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23207249 https://figshare.utas.edu.au/articles/thesis/The_sedimentology_of_Holocene_Prydz_Bay_sedimentary_patterns_and_processes/23207249 |
| Summary: | Material being deposited in Prydz Bay is glaciogenic, aeolian, and biogenic. Terrigenous material is entrained by basal glacial erosion and introduced to the sea via iceberg rafting, meltout, and rollover in the periphery of Prydz Bay where iceberg drift tracks are determined by ocean currents. It accounts for the deposition of about 8 Mt a-1 . Aeolian processes transport debris from coastal oases into the manne environment in the summer or onto fast sea-ice during the winter. Sea-ice breaks out and releases the debris into the water column as it melts within a few hundred kilometres ofthe source, accounting for approximately 1 Mt a-1 of sediment. The skeletons of phytoplankton settle to the sea floor directly or via the faecal pellets of predacious zooplankton. Although production is geographically uniform, the deposition of the resultant ooze depends on bottom currents concentrating the fine material in deep water basins ( eg. Amery Depression). Approximately 0. 7 5 Mt of such material is deposited ... |
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