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Holocene sedimentology in an isolation basin in the Larsemann Hills, East Antarctica
https://nipr.repo.nii.ac.jp/records/16876
https://nipr.repo.nii.ac.jp/records/16876837065af-16a3-48c7-a030-3ce241e9d224
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-05-20 | |||||
| タイトル | ||||||
| タイトル | Holocene sedimentology in an isolation basin in the Larsemann Hills, East Antarctica | |||||
| タイトル | ||||||
| タイトル | Holocene sedimentology in an isolation basin in the Larsemann Hills, East Antarctica | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Paleoenvironmental changes | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Particle size | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Lake sediment | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Larsemann hills | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | East Antarctica | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mahesh, B.S.
× Mahesh, B.S.× Nair, Abhilash× Ghadi, Pooja× Warrier, Anish Kumar× Mohan, Rahul |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Holocene paleoenvironmental changes along the East Antarctic margin have been reconstructed using marine and lake sediment cores. Isolation basins in the coastal ice-free regions offer continuous sedimentary sequences to reconstruct marine-freshwater transitions and its environmental changes. In this study, we present the grain size (sand-silt-clay) and organic matter variations in a 51 cm radiocarbon-dated sediment core from Pup Lagoon, an isolation basin in Larsemann Hills (East Antarctica). The sediment core spans the last 6109 years and provides information on environmental changes in two different settings, i.e., (a) under the marine influence, and (b) as an isolated lake. Three cluster zones were identified viz., LZ1 (6109–2427 y BP: marine environment), LZ2 (2427–2101 y BP: transition zone) and LZ3 (2101–116 y BP: freshwater environment). Fine grain sediments (silt) are dominant in LZ1, indicating a strong hydrodynamic energy conditions affected by tidal currents with low organic matter. Higher sand content during the transition period (LZ2) indicates the strongest hydrodynamic condition and sediment deposition from sea ice. The increasing trend of OM (cyanobacterial benthic mat) beginning at ~ 2101 y BP suggests the isolation of the lake. The highest fine grained sediments (silt-clay) in LZ3 suggests lowered meltwater derived detritus in response to mild austral summer conditions during the Late Holocene. | |||||
| 書誌情報 |
en : Polar Science 巻 30, p. 100729, 発行日 2021-12 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 18739652 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.polar.2021.100729 | |||||
| 関連名称 | 10.1016/j.polar.2021.100729 | |||||
