Planktonic Foraminifera in the Continental Slope of the Northern South China Sea during the Last 130

来源 :Acta Geologica Sinica(English Edition) | 被引量 : 0次 | 上传用户:huweiboweb
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Core V36-06-3, approximately 12m long, was raised from the lower part of the continental slope of the continental South China Sea from a water depth of 2,809 m. Analyses of planktonic foraminifera, CaCO_3 content and oxygen isotopes(δ~(18)O) in shells of Globigerinoides sacculifer show that the trend of the sea surfacetemperature change at this site over the last 130,000 years is consistent with that in other oceans, while the expression of the dissolution cycles of calcium carbonates here is contrary to that in the Pacific Ocean but consistent with that in the Atlantic Ocean, which means that the dissolution was intense and the CaCO_3 content was slightly low during the glacial ages, but the reverse was true for the interglacial ages. The reason for this is that during the glacial ages large quantity of terrigenous detrital materials were brought into the abyssal and bathyal Zones, thus diluting the calcium carbonate deposits and intensifying their dissolution. Core V36-06-3, approximately 12m long, was raised from the lower part of the continental slope of the continental South China Sea from a water depth of 2,809 m. Analyzes of planktonic foraminifera, CaCO 3 content and oxygen isotopes (δ ~ (18 ) O) in shells of Globigerinoides sacculifer show that the trend of the sea surface temperature change at this site over the last 130,000 years is consistent with that in other oceans, while the expression of the dissolution cycles of calcium carbonates here is contrary to that in the the Pacific Ocean but consistent with that in the Atlantic Ocean, which means that the dissolution was intense and the CaCO_3 content was slightly low during the glacial ages, but the reverse was true for the interglacial ages. The reason for this is that during that the glacial ages large quantity of terrigenous detrital materials were brought into the abyssal and bathyal zones, thus diluting the calcium carbonate deposits and intensifying their dissolution.
其他文献
本文通过对浙江已知500余个燕山期脉状石英一萤石矿床的矿化追踪裂隙、围岩岩性、蚀变特点、矿体包体等方面的分析综合,论述了萤石成矿物质不是来自围岩,而主要是来自岩浆期
在主场完败伊拉克之后,组队仅两个月的“卡家军”游走到了世预赛出局的边缘。一如前两届世界杯预选赛——国足出线,仅剩下理论上的希望。尽管外界还在幻想着奇迹出现,但对卡家军来说,进军巴西世界杯之旅已经提前结束……前不久,卡马乔还信誓旦旦:一定要把中国队带到巴西。如今,梦想破碎,卡马乔和中国足协还能做些什么呢?    出线?早就出局了    临阵换帅是兵家之大忌。年薪450万欧元的卡马乔团队,在率领国足接
本文经地震史载分析,增补了广东省明清两代M=4(1/2)-5(3/4)的地震共15次. Based on the historical records of earthquakes, the paper supplemented 15 times M = 4 (1/2)
本文通过对滇科1孔10个样品的正构一元脂肪酸的分析,探讨了在早期成岩作用环境下脂肪酸的特点;母质输入与沉积环境对脂肪酸分布特征的影响和控制,对综合评价我国内陆淡水湖盆
本文以沉积剖面旋回层为基础,提出了研究古代浅海沉积环境和古沉积的新方法。这一方法可能定量地、较精确地重现古代浅海的某些沉积环境,揭示沉积环境的演变,并对古沉积学、
根据甘肃省地震台网测定,1987年元月8日02点19分在甘肃省迭部境内发生了一次5.9级(M_s)地震。震中位于北纬34°10’,东经103°14’。震源深度为11公里。地震发生后,我们收集
四川省是我国历史上产金较多的省区之一.全川180多个县,除少数几个以外,都产过金.不少河流,例如嘉陵江、涪江、白龙江、金沙江、岷江、大金川、小金川等,都因为产产砂金丰旺
本文建立了无限水平柱体的总磁异常之解释方法。同传统的异常解释方法(特征点法和积分法)相比较,本方法具有以下几个特点。首先,所提出的特征点法和积分法适合于任意磁化水平
本文利用边界元与有限元耦合方法和实测的纵向视电阻率曲线模拟了内蒙寒汗乌力吉地区的地壳电性结构。根据钻孔资料和综合地球物理勘探成果,构制了本模型的上部电性结构。在
关于原子序数57—71号的稀土族相关元素在地球化学作用中具有完全同型性状的概念,至今已在很大程度上得到了重新审定。盛行于19世纪并反映在B.M.戈尔德施密特、В.и.维尔纳