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Late Quaternary high-resolution stratigraphic reconstruction of the East Sea sediment cores based on high resolution images and color parameters

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Title
Late Quaternary high-resolution stratigraphic reconstruction of the East Sea sediment cores based on high resolution images and color parameters
Other Titles
색지수 이미지를 이용한 후기 제 4기 동해 퇴적물 코어의 고해상 층서복원
Authors
Park, O.B.
Lee, Mi Jung
Subject
Geology
Keywords
sediment color; paleoceanography/paleoclimate; late Quaternary; NGRIP δ18O; D-O cycles
Issue Date
2010
Citation
Park, O.B., Lee, Mi Jung. 2010. "Late Quaternary high-resolution stratigraphic reconstruction of the East Sea sediment cores based on high resolution images and color parameters". The Geological Society Of Korea, 46(5): 439-452.
Abstract
Using the 3-CCD (charge-coupled device) line scan camera equipped within the Avaatech XRF-Core Scanner, high resolution images and color parameters were estimated from the 3 sediment cores (05GCRP-13, 14, 15), which were taken from the western margin of the East Sea. Based on the high resolution images and color parameters, a precise stratigraphy can be established for the 3 sediment cores. For the establishment of a precise stratigraphy, lightness values (L*), AMS 14C dating and 5 tephra layers deposited in the sediment core 05GCRP-15 are used to correlate with those data recorded in the core MD01-2407 which was retrieved from the Oki Ridge of the southeastern East Sea. According to the precise age model, the 3 investigated sediment cores are likely to represent the paleoceanographic record during the last about 94 ka BP (since the MIS 5.2). In particular, color parameters such L*, a* and b* can be used for the correlation between sediment cores recovered from the East Sea. Moreover, these color parameters are closely related with any chemical composition such as organic carbon and/or carbonate contents. Furthermore, the East Sea sediments that are characterized by alternations of dark and light layers seemed to well reflect the paleoceanographic changes during the late Quaternary glacial-interglacial cycles. These dark and light cycles on millennial scales are well matched the D-O (Dansgaard-Oeschger) cycles recorded in the NGRIP (North Greenland Ice Sheet Project) ice core δ18O data. As a result, the high resolution images together with color parameters can be used as a reliable proxy for establishing a precise stratigraphy as well as the paleoceanographic reconstruction in the East Sea during the late Quaternary.
URI
http://repository.kopri.re.kr/handle/201206/5955
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