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运用微体化石的研究结果辨识岩心不同的沉积阶段的沉积特征及古海洋学特点 ,并辅以δ18O曲线及AMS14 C测年去探讨岩心的沉积时代。该岩心是 1996年 5月中国、法国、韩国科学家一起利用法国L’ATALANTE号海洋调查船在东海陆架获取的 17个岩心中的一个 ,分别做了粒度、矿物、CaCO3、微体化石、δ18O、AMS14 C测年等分析 ,初步分析认为 :依据微体化石的冷、暖水种的丰度变化 ,可以辨识出该岩心气候的 7个冷期 (C1、C2 、C3、C4 -1、C4 -2 、C5、C6、C7) ,然后结合岩心中的矿物成份、CaCO3 含量、粒度变化、AMS14 C的测年数据把岩心划分为 4个沉积阶段 ,1.晚更新世早玉木冰期沉积。 2 .玉木亚间冰期沉积。 3 .晚更新世玉木冰期沉积。 4.全新世冰后期沉积。另外 ,利用浮游有孔虫壳体对不同的沉积阶段所做的AMS14 C测年结果分别为 96 90aBP、12 980aBP ,2 6 35 0aBP ,2 796 0aBP ,37410aBP ,412 6 0aBP .
Based on the results of microfossil analysis, the sedimentary characteristics and palaeoclimate characteristics of different sedimentary stages in the core are identified, and the δ18O curve and AMS14 C dating are used to explore the sedimentary age of the core. The core was one of 17 cores obtained by scientists from China, France and South Korea on the East China Sea shelf using the L’ATALANTE survey ship of France in May 1996. The cores were characterized by grain size, minerals, CaCO3, microfossils, δ18O, According to the analysis of AMS14 C dating, the preliminary analysis shows that seven cold periods (C1, C2, C3, C4 - 1 and C4 -) of the core climate can be identified based on the abundance changes of the cold and warm water of the microfossil. 2, C5, C6 and C7). Then the core was divided into four sedimentary stages according to the mineral composition, CaCO3 content and grain size in the core, and the dating data of AMS14C. (1) Late Pleistocene sedimentary deposition in early Tamaki ice age. 2, Tamagaya interglacial deposition. Late Pleistocene Tamaki glacial deposition. Late Holocene sediments. In addition, the dating results of AMS14 C made by planktonic foraminifera shells at different depositional stages were 96,90aBP, 12,980aBP, 2,635aBP, 2,796ba, 37,410aBP and 412,60aBP, respectively.