沉积学报2017，Vol.35Issue(4)：730-739,10.DOI:10.14027/j.cnki.cjxb.2017.04.007
沉积过程中有机碳及Globigerinoides ruber氧、碳同位素变化特征——以南海南部为例
Changes of TOC and δ18O, δ13C from Globigerinoides ruber during the Deposition Process in the Southern South China Sea
摘要
Abstract
The ocean sediments are formed in surface water and finally preserved in sea floor.During this process, the sedimentary environment always changed.In this paper, the change characteristics of TOC(%), TOC flux and δ18O and δ13C values from Globigerinoides ruber during the deposition process had been discussed in detail, basing on analyzing the relationships among particulate matter, surface sediment and core sediment in Southern of South China Sea(SCS).Here, the results shown that:1) The different proxies, such as TOC(%), TOC flux and δ18O,δ13C, have different changes during the deposition process.Specially, all the values of TOC(%), TOC flux and δ18O,δ13C descended visibly during the deposition satge from deep water layers to sea floor.The value of TOC% and TOC flux descend from 4.20%, 0.38 g/(cm2·ka) to 1.182%, 0.039 g/(cm2·ka), respectively.The value of δ18O,δ13C descend from 3.298‰ and 0.431‰ to 2.923‰ and 1.461‰, respectively.Reversely, when the core sediment formed in sea floor, the value of δ18O,δ13C would become stable except TOC(%) and TOC flux;2) The relationship between TOC(%) change and value of δ18O, δ13C become visibly when the core sediment formed.Specially, there are clearer coherence between TOC(%) and value of δ18O in core sediments than other sediment types.In other hand, the change of relationship between TOC(%) and value of δ18O and δ13C indicate that the dissolution of TOC might be one of important factors leads to change of δ18O and δ13C value.In one word, the change characteristics of TOC(%), TOC flux and δ18O, δ13C during different sedimentary stages must be considered when reconstruct the palaeoenvironment evolution history based on these proxies.关键词
Globigerinoidesrubber/同位素/有机碳(TOC)/沉积过程/南海南部Key words
Globigerinoides rubber/isotope/total organic carbon(TOC)/deposition process/southern of South China Sea分类
海洋科学引用本文复制引用
李文宝,王汝建,万随..沉积过程中有机碳及Globigerinoides ruber氧、碳同位素变化特征——以南海南部为例[J].沉积学报,2017,35(4):730-739,10.基金项目
国家自然科学基金项目(41406056) （41406056）
内蒙古自治区自然科学基金项目(2012MS0612,2016MS0552)National Natural Science Foundation of China, No.41406056 （2012MS0612,2016MS0552）
Natural Science Foundation of Inner Mongolia, No.2012MS0612,2016MS0552 （）
