文献类型：期刊文献

英文题名：Evaluating color parameters calculated from digital photographs of sediment cores as a tool in paleoenvironmental reconstruction-A case study using IODP Site U1502 from the South China Sea

作者：Wu, Li[1,3,4];Huang, Xin[1,2,3,4];Cao, Han-sheng[1,3,4];Wang, Ru-jian[5]

机构：[1]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang 524088, Guangdong, Peoples R China;[2]Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao 266071, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov, Zhanjiang, Guangdong, Peoples R China;[4]Minist Nat Resources, Key Lab Space Ocean Remote Sensing & Applicat, Beijing 100081, Peoples R China;[5]Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China

年份：2022

卷号：442

外文期刊名：SEDIMENTARY GEOLOGY

收录：SCI-EXPANDED(收录号：WOS:000902035800002)、、EI(收录号：20224713140190)、Scopus(收录号：2-s2.0-85141924033)、WOS

基金：We thank the International Ocean Discovery Program (IODP) for providing the data used in this work. We would like to acknowledge Professor Brian Jones and two anonymous reviewers for their comments and suggestions that significantly improve this manuscript. We also thank Dr. Chang Liu from IODP Center, Texas A&M University and Dr. Xiaobo Jin fromState Key Laboratory ofMarine Geology, Tongji University for their help with IODP data acquisition. This work is jointly supported by the National Natural Science Foundation of China, the Open Fund of Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences, the Open Fund of State Key Laboratory of Marine Geology, Tongji University and the Young Scholarship of the South China Sea of Guangdong Ocean University (Grant Nos. 42006065, MGE2018KG13, 42276077, MGK202207, 573118019).

语种：英文

外文关键词：Sediment core photograph; Sediment color; South China Sea; Late Miocene; Turbidite deposits; Earthquake

外文摘要：Qualitative color data of sediments contain rich information on sediment compositions and have been widely used in paleoenvironmental reconstructions. Digital photographs can produce ultra-high resolution color data of sediment sequences. The characteristics of such data, however, are not yet explored adequately, hindering their use in practice. To fill this gap, in this study we calculated color data from digital photographs of sediment cores from Hole U1502A drilled during International Ocean Discovery Program Expedition 368 in the South China Sea, and compared them with their counterparts measured using a Diffuse Reflectance Spectrophotometer (DRS). We found that the luminance parameter L could be influenced by multiple factors, leading to its behavior being transient, while the chromaticity parameters a* and b* are relatively stable. The down-core patterns of photograph-derived L a* and b* are comparable with their counterparts derived from DRS measurement, although their absolute values can diverge significantly from those DRS-measured ones. The color of the studied core sediments alternates between grayish-brown and greenish-gray, being pelagic deposits and earthquake-induced turbidite deposits, respectively. Such color cycles had been present since similar to 13 Ma, revealing a dramatic increase in submarine earthquakes due to subduction of the SCS Plate toward the Philippine Plate. Overall, our study demonstrates that color parameters calculated from sediment photographs could be developed as promising tools for studies relating to paleoenvironmental reconstructions. (C) 2022 Elsevier B.V. All rights reserved.