RELATIVE ABUNDANCE CHANGES, STRATIGRAPHIC AND PALAEO-OCEANOGRAPHIC SIGNIFICANCE OF RADIOLARIAN Botryocyrtis scutum IN SOUTH CHINA SEA SINCE PLEISTOCENE
-
摘要: 试图通过南海更新世以来3个柱状样中Botryocyrtis scutum (放射虫) 的研究, 探讨其地层和古海洋学意义. 根据南海更新世以来3个柱状样中Botryocyrtis scutum的丰度变化与氧同位素记录的对比研究发现, 氧同位素18期以来Botryocyrtis scutum丰度变化与氧同位素记录有较好的对应关系, 其丰度变化随冰期与间冰期旋回而波动.冰期丰度降低, 间冰期丰度增加.其丰度变化基本上与氧同位素记录一样, 反映了冰期与间冰期旋回, 并且可以作为地层划分和对比的工具.
-
关键词:
- Botryocyrtis scutum(放射虫) /
- 丰度变化 /
- 古海洋学意义 /
- 更新世 /
- 南海
Abstract: This paper presents the discussion of the stratigraphic and palaeo oceanographic significance of Botryocyrtis scutum in the three cylindrical samples that have occurred in the South China Sea since the Pleistocene. The relative abundances of the radiolarian Botryocyrtis scutum in the three cylindrical samples in the South China Sea since the Pleistocene are correlated with oxygen isotopic records, indicating that the relative abundance of the Botryocyrtis scutumv corresponds well to the oxygen isotopic records since the MIS 18. The abundance of B. scutum fluctuated during the glacial and interglacial periods, with its high abundance during the interglacial period and the low one during the glacial period. Just like the oxygen isotopic records, the abundance changes of B. scutum indicate the glacial and interglacial cycle and at the same time can be considered as a tool for the stratigraphic classification and correlation. -
图 1 南海17957和17959柱与ODP1146的站位(等值线单位m)
Fig. 1. Location of core 17957, 17959 and ODP site 1146 in the South China Sea
图 2 南沙海区17957柱氧同位素分期与Botryocyrtis scutum的丰度变化
Fig. 2. Oxygen isotopic records and abundance variations of Botryocyrtis scutum in core 17957 of the southern South China Sea
-
[1] Renz G W. The distribution and ecology of radiolaria in the central Pacific plankton and surface sediments[J]. Bulletin of the Scripps Institution of Oceanography University of California, 1976, (22): 1~267. [2] Nigrini C A. Radiolarian assemblages in the north Pacific and their application to a study of Quaternary sediments in core V20-130[A]. In: Hayes J D, ed. Geological investigation of the north Pacific[C]. The Geological Society of America, Memoir 126. Boulder: Colorado, 1970. 139~183. [3] Petrushevskaya M. Radiolaria order Nassellaria of the ocean[J]. Acad Science USSR Zool Inst, 1981, 128: 1~405. [4] Casey R E. The ecology and distribution of recent radiolaria[A]. In: Ramsay A TS, ed. Oceanic micropaleontology [C]. London: Academic Press, 1977. 809~845. [5] 陈文斌. 南沙北部晚第四纪放射虫的垂直分布及其古气候意义[A]. 见: 郑连福, 陈文斌, 编. 南海海洋沉积作用过程与地球化学研究[C]. 北京: 海洋出版社, 1993. 63 555第6期王汝建等: 南海更新世以来Botryocyrtis scutum(放射虫)的丰度变化及其地层和古海洋学意义~72. [6] Sarnthein M, Pflaumann U, Wang P, et al. Preliminary report on Sonne-95 cruise "Monitor Monsoon" to the South China Sea, Berichte-Reports[J]. Geol Palaont Inst Univ Kiel, 1994, 68: 225. [7] 王汝建, Abelmann A. 南海更新世的放射虫生物地层学[J]. 中国科学(D辑), 1999, 29(2): 137~143. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK199902005.htm [8] Wang P, Prell W L, Blum P, et al. Proc ODP, Init Repts, 184. Ocean drilling program[M/CD]. Texas: Texas A & M University, College Station. 2000. [9] 赵泉鸿, 汪品先. 南海第四纪古海洋学研究进展[J]. 第四纪研究, 1999, 6: 481~501. doi: 10.3321/j.issn:1001-7410.1999.06.001 [10] 赵泉鸿, 翦知, 李保华, 等. 南沙深海沉积中的中更新世微玻陨石[J]. 中国科学(D辑), 1999, 29(1): 45~49. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK199901006.htm [11] 王汝建, 李保华, 成鑫荣, 等. 南沙深水区第四纪生物地层学研究[J]. 第四纪研究, 1999, 6: 541~548. doi: 10.3321/j.issn:1001-7410.1999.06.007 -
下载:
点击查看大图
图(3)
计量
- 文章访问数: 4026
- HTML全文浏览量: 413
- PDF下载量: 6
- 被引次数: 0
