| 冲绳海槽--弧后背景下大陆张裂的最高阶段 |
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| 引用本文： | 周祖翼,廖宗廷,金性春,贾健谊.冲绳海槽--弧后背景下大陆张裂的最高阶段[J].海洋地质与第四纪地质,2001,21(1):51-55. |
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| 作者姓名： | 周祖翼 廖宗廷 金性春 贾健谊 |
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| 作者单位： | 1. 同济大学 海洋地质教育部重点实验室,
2. 中国新星石油公司 上海海洋石油局, |
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| 基金项目： | 国家自然科学基金资助项目（49876013） |
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| 摘 要： | 高热流、强地震活动、火山活动、张性断层作用以及快速沉降等特征表明部绳海槽的演化已经达到了大陆张裂的最高阶段。根据地震折射和重力资料的计算表明冲绳海槽底下存在低密度的异常地幔，冲绳海槽的莫霍面介于15．4－23．8km之间。在我们提出的边缘海盆地演化旋回中，冲绳海槽处于胚胎期，即处在大陆张裂的最高阶段和弧后海底扩张的过滤阶段。冲绳海槽也可视为是威尔逊旋回中连接东非裂谷和红海阶段的一个重要的中间环节。
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| 关 键 词： | 大陆张裂 边缘海 冲绳海槽 地壳结构 莫霍面 张裂机制 异常上地幔 |
| 文章编号： | 0256-1492（2001）01-0051-05 |
| 修稿时间： | 2000年7月7日 |
OKINAWA TROUGH：THE HIGHEST STAGE OF CONTINENTAL TENSION RIFTING IN BACK-ARC SETTING |
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| ZHOU Zu-yi,LIAO Zong-ting,JIN Xing-chun,JIA Jian-yi.OKINAWA TROUGH：THE HIGHEST STAGE OF CONTINENTAL TENSION RIFTING IN BACK-ARC SETTING[J].Marine Geology & Quaternary Geology,2001,21(1):51-55. |
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| Authors: | ZHOU Zu-yi LIAO Zong-ting JIN Xing-chun JIA Jian-yi |
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| Abstract: | Characteristics of the Okinawa Trough such as high heat flow values,intensive earthquake activities,volcanic activities,extensional faulting and rapid subsidence have indicated that the evolution of the trough has reached the highest stage of continental tension rifting.Calculations from seismic refraction and gravitational data show that anomalous mantle of low density exist beneath the Okinawa Trough and that Moho in the trough lies between 15 4 km and 23 8 km in depth.In our proposed evolutional cycles for marginal sea basins,the Okinawa Trough is in the embryonic stage,that means it is in the highest stage of continental tension rifting and in the transitional stage of back arc seafloor spreading.The Okinawa Trough can also be considered as an important link between East African Rift and Red Sea stage in the Wilson Cycle. |
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| Keywords: | continental tension rifting marginal sea the Okinawa Trough |
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