Tracking the paleo-depositional environment around Dokdo Island by using elemental composition of smectite

Title
Tracking the paleo-depositional environment around Dokdo Island by using elemental composition of smectite
Author(s)
이기환; 김창환; 양기호; 박찬홍; 김진욱
Publication Year
2019-10-24
Abstract
Variations in clay mineral assemblages have been widely used to understand changes
sediment provenance during glacial and interglacial periods. The recent site (132° 00.3
37° 24.252’) in the basin-like topography was explored to understand sedimentary fac
sedimentation rate, mineralogical composition including Mn-carbonates, clay mineralogy, re
proportion of clay minerals, and elemental composition of smectite. The change of deposirir
environment has influenced the deep-sea sediments around Dokdo Island during the interglaz
the late glacial period, and the glacial period. During the interglacial period and the late
period bioturbated mud is dominant with high sedimentation rate which indicated that sedime
derived from many provenances. While, laminated mud is dominant during the glacial period
with low sedimentation rate. Occurrence of Mn-carbonates (CaM) indicated the changing m
depositional environment from the glacial period to the late glacial period. Variation in
relative proportion of clay minerals such as smectite, illite, chlorite and kaolinite also ref
the change of depositional environment during the glacial-interglacial period. Also, elemer
composition of smectite, which widely used as indicator of provenance, was used in this stj
In this study, the interpretation of paleo-depositional environment around Dokdo Island
discussed.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/22217
Bibliographic Citation
2019추계지질과학연합학술대회, pp.284, 2019
Publisher
대한지질학회
Type
Conference
Language
Korean
Publisher
대한지질학회
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