| 南沙海区沉积物沉积速率的测定和沉积环境探讨 |
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| 引用本文： | 刘韶,秦佩玲,张惠玲.南沙海区沉积物沉积速率的测定和沉积环境探讨[J].热带海洋学报,1991(3). |
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| 作者姓名： | 刘韶 秦佩玲 张惠玲 |
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| 作者单位： | 中国科学院南海海洋研究所 广州510301
(刘韶，秦佩玲)，中国科学院南海海洋研究所 广州510301(张惠玲) |
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| 摘 要： | 运用~(230)Th_(ex)和~(230)Th_(ex)/~(232)Th方法测定柱状样NS87—11样品的沉积速率分别为1.51cm/10~3年,1.06cm/10~3年,结合N元素的含量以及Th/U比值,氧同位素资料等讨论本沉积区的沉积环境和古气候的变化特征,认为本柱样中更新世以来经历海平面上升→下降→上升→下降→上升的格局,古气候反映暖→冷→暖→冷→暖。
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| 关 键 词： | 南沙 沉积物的沉积速率 环境 古气候 |
A DISCUSSION ON DETERMINATION OF THE DEPOSITIONAL RATE OF SEDIMENTS AND ENVIRONMENT OF NANSHA ISLANDS |
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| Liu Shao Qin Peiling Zhang Huiling.A DISCUSSION ON DETERMINATION OF THE DEPOSITIONAL RATE OF SEDIMENTS AND ENVIRONMENT OF NANSHA ISLANDS[J].Journal of Tropical Oceanography,1991(3). |
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| Authors: | Liu Shao Qin Peiling Zhang Huiling |
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| Abstract: | By application of 230Thex and 230Thex/232Th methods , measured sedimentation rate of core sample NS. 87-11 were 1.51 cm/103a and 1.06 cm/103a respectively. The change in characters of the sedimentation environment and palaeo-climate have been discussed through Oxygen isotope data in conjunction to Nitrogen concentration and the ratio of Th to U.
It is considered that since Mid-Pleistocene, the core had been through the pattern of sea level elevation-descent-elevation-descent-elev ation and so on until the last elevation. The Palaeo-climate reflects a warm-cold-warm-cold-warm climate. |
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| Keywords: | Nansha Islands deposition rate of sediments environment palaeo-climate |
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