南海北部全新世以来的古气候演变  

HOLOCENE PALAEOCLIMATIC CHANGES IN THE NORTHERN SOUTH CHINA SEA

作　　者：李学杰 韩建修 

出　　处：《南海地质研究》1997年第0期86-104,T002,共20页Gresearch of Eological South China Sea

摘　　要：在南海北部陆坡和陆架柱状样ＨＹ４－９０１及ＺＤ４８－５Ｂ的大量样品中，作者基于涂、粘土矿物、ＣａＣＯ３、δ＾１３Ｃ、δ＾１８Ｏ、孢粉、有孔虫、放射虫、硅藻的分析测试，对地层层序、沉积特征、微体古生物特征进行了研究总结：·根据岩石地层生物地层、稳定同位素地层的研究，建立了全新统的地层层序，并命名为一统组。·氧稳定同位素的详细研究表明，全新世以来的气温波动可以明显地分出８－９个周期。The sedimentation, distribution of CaCO_3, δ~(18)O, δ~(13)C, foraminifera, radiolaria, diatom, and sporopollen in the piston cores of HY4-901, ZD48-5B in the Northern South China Sea have been researched by the authors in order to trace back the Holocene palaeoclimatic changes and to forecast the future in the area. The major conclusions are as follows: ·The sedimentation in this area, esp. in the continental slope area, is continual and even-textured, the piston cores fitted for the research of palaeoclimatology, the Holocene stratum i.e. Yitong Formation, is firstly named to follow the Yitong shaol in the northern South China Sea. ·8 - 9 cycles of climatic fluctuation in Holocene, with ca. 1 000-1 200 a, can be divided according to the changes of δ~(18)O. ·It may be divided into 4 phases in Holocene from early to present: ㈠nathermal; ② Hysithermal; ③luctuating temperature; ④Katathermal. · It will be cooler generally, but it may be warmer in short time with slight amplitude.

关 键 词：古气候演变 全新世 南海北部 古气候 

分 类 号：P532[天文地球—古生物学与地层学]