Sediment provenance variations in the southern Okhotsk Sea over the last 180 ka: Evidence from light and heavy minerals

In this study, we investigate light and heavy minerals in sediment core OS03-1 located at the Academy of Sciences Rise of the southern Okhotsk Sea to determine their distributions and sources over the last 180 ka (thousand years). The sediment mainly consists of terrigenous and volcanic detritus. Ub...

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Bibliographic Details
Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Wang, Kunshan, Shi, Xuefa, Zou, Jianjun, Kandasamy, Selvaraj, Xun, Gong, Wu, Yonghua, Yan, Quanshu
Format: Article in Journal/Newspaper
Language:unknown
Published: ELSEVIER SCIENCE BV 2017
Subjects:
Okhotsk
aleutian low
Kamchatka
okhotsk sea
Sea ice
Online Access:https://epic.awi.de/id/eprint/44813/
https://epic.awi.de/id/eprint/44813/1/P3-Wang-2017.pdf
http://www.sciencedirect.com/science/article/pii/S0031018216303789
https://hdl.handle.net/10013/epic.51054
https://hdl.handle.net/10013/epic.51054.d001
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Summary:In this study, we investigate light and heavy minerals in sediment core OS03-1 located at the Academy of Sciences Rise of the southern Okhotsk Sea to determine their distributions and sources over the last 180 ka (thousand years). The sediment mainly consists of terrigenous and volcanic detritus. Ubiquitous drop-stones and volcanic detritus throughout the core and high detrital input suggest that sea ice, driven by wind and Kamchatka Current, was the main transport agent of detrital materials to the southern Okhotsk Sea. The ternary diagram of heavy minerals (hornblende-hypersthene-epidote) shows an expansion of detritus provenance from the eastern in cold periods to the northeastern in warm intervals of the Okhotsk Sea. It mainly relates to the shift of Aleutian Low. Combined with previous records, accumulation rates of quartz indicated a maximum extent but not perennial sea ice coverage during the glacial periods.

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