Comparison of bulk organic carbon and radiocarbon ages in coastal sediments: implications for age model reconstruction and application

Title
Comparison of bulk organic carbon and radiocarbon ages in coastal sediments: implications for age model reconstruction and application
Author(s)
Hyun, Sangmin; Kang, Jeong Won
KIOST Author(s)
Hyun, Sang Min(현상민)Kang, Jeong Won(강정원)
Alternative Author(s)
현상민; 강정원
Publication Year
2021-06-18
Abstract
Bulk organic carbon and radiocarbon ages from marine shell fragments in coastal marine sediments were compared for the late Holocene core sediments collected from the southern continental shelf area of the Korean peninsula. Our results indicated that the radiocarbon ages of organic carbon were older than those of shell fragments. The age differences are around 1,150-1,860 years in conventional radiocarbon age at the same depth. There could be distinctive contamination of the old terrigenous carbon in sediments, even though the C/N ratio and d 13C ratios of organic carbon indicate that most of the organic materials in studied core sediment are in situ marine origin. This study suggests that the radiocarbon organic carbon ages in marine sediment are generally older than inorganic carbon ages determined by shell fragments and foraminiferal tests, therefore, it should be careful to use age data by bulk organic carbon and age model reconstruction.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41479
Bibliographic Citation
2021 한국제4기학회 춘계학술대회, 2021
Publisher
한국제4기학회
Type
Conference
Publisher
한국제4기학회
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