文献类型：期刊文献

英文题名：A Millennial-Scale Tephra Event-Stratigraphic Record of the South China Sea since the Penultimate Interglacial

作者：Feng, Weijia[1];Yang, Jiawen[1];Bao, Chuang[1];Kong, Deming[1,2,3];Chen, Min-Te[4,5]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Key Lab Climate Resources & Environm, Continental Shelf Sea & Deep Sea Dept Educ Guangd, Zhanjiang 524088, Guangdong, Peoples R China;[3]Guangdong Ocean Univ, Shenzhen Res Inst, Shenzhen 518108, Peoples R China;[4]Natl Taiwan Ocean Univ, Inst Earth Sci, Ctr Excellence Oceans, Keelung 202, Taiwan;[5]Natl Taiwan Ocean Univ, Ctr Excellence Ocean Engn, Keelung 202, Taiwan

年份：2022

卷号：2022

外文期刊名：LITHOSPHERE

收录：SCI-EXPANDED(收录号：WOS:000977122600011)、、WOS

基金：This work was funded by the National Key Research and Development Program of China (2018YFA0605601), the National Natural Science Foundation of China (41606070), the Program for Scientific Research Start-Up Funds of Guangdong Ocean University (R17011), and the Guangdong Provincial College Innovation Team Project (2019KCXTF021). The sediment core KK2002-K3 was collected onboard of R/V "Tan Kah Kee" implementing the open research cruise NORC2019-06, which was supported by NSFC Shiptime Sharing Project (project number: 41849906).

语种：英文

外文摘要：Large volcanic eruptions have significant impacts on climate and environmental changes. The deposition of tephra in marine sediments may serve as an eruption recorder, but it has not been extensively studied in the western Pacific. This study explored a millennial-scale tephra event-stratigraphy with multiple indicators in a sediment core collected from the eastern South China Sea (SCS) basin. The magnetic susceptibility (MS), Fe and Mn concentrations determined by X-ray fluorescence (XRF), and identification of individual ash particles were used to identify tephra layers and reconstruct the history of volcanic activity. Nine visible volcaniclastic units (VVU) and two cryptotephra layers have been identified based on their distinct features, as manifested by high MS, Fe, and Mn concentrations and single-peak grain size distribution. The VVUs and cryptotephra layers reveal elevated volcanic activities. Using the radiocarbon age model and oxygen isotope stratigraphy, these episodes could roughly correspond to the following periods: 1-11 ka, 16-17 ka, 27-31 ka, 41-42 ka, 45-46 ka, 49-50 ka, 77-80 ka, 90-91 ka, 97-99 ka, 116-126 ka, and 132-140 ka. The alkenone-derived SST has significant glacial cycles and good synchronicity with other SCS SST records, which could partially help build the preliminary age model. Despite possible age errors larger than 1 kyr, the discovery and timing of tephra layers provide a preliminary framework to further investigate the impact of historical volcanic eruptions on climate changes.