globalchange  > 气候变化事实与影响
CSCD记录号: CSCD:6528475
论文题名:
海底地形对不同时间尺度岩浆供给变化的响应
其他题名: Seafloor Bathymetry Response to Different Time Scale of Magmatic Supply Fluctuation
作者: 贠晓瑞1; 李江海1; 吴桐雯1; 宋珏琛1
刊名: 北京大学学报. 自然科学版
ISSN: 0479-8023
出版年: 2019
卷: 55, 期:3, 页码:7931-7940
语种: 中文
中文关键词: 洋中脊 ; 断层 ; 岩浆供给 ; 气候变化周期
英文关键词: mid-ocean ridge ; fault ; magmatic supply ; climate change
WOS学科分类: OCEANOGRAPHY
WOS研究方向: Oceanography
中文摘要: 利用有限差分数值模拟方法,恢复洋中脊地形的形成过程,模型中岩浆供给按一定的时间周期和幅度规律性地变化。结果表明:只有当岩浆供给变化周期的时间尺度大于在洋中脊同一侧形成两条断层的时间间隔时,才能影响海底地形的形成过程并被记录。结合数值模拟实验结果和不同类型洋中脊的地形特征,认为快速扩张洋中脊是唯一可能在地形上记录到米兰科维奇气候周期(偏心率(100 ka)、倾斜度(41 ka)和岁差(23 ka)) 3个时间尺度岩浆变化周期的洋中脊类型,中速扩张洋中脊和部分岩浆供给充足慢速扩张洋中脊的地形可能与100 ka尺度的岩浆供给变化周期有关,大部分慢速扩张洋中脊海底地形不受100 ka及以下的岩浆供给变化周期影响。
英文摘要: The finite-difference numerical simulation is used to reproduce the seafloor bathymetry near mid-ocean ridges. The magma supply in the model changes regularly with fluctuation period and amplitude. The results indicate that only when the magmatic supply fluctuation period is greater than the time interval between the formation of two faults on the same side of mid-ocean ridge, the formation process of the seafloor bathymetry can be influenced and recorded. Combined with numerical simulation results and different types of ocean ridge topography, this paper considers that the fast spreading mid-ocean ridge is the only ridges type that can record three magmatic supply fluctuation period of Milankovich cycles (eccentricity (100 ka), obliquity (41 ka) and precession (23 ka)) on the bathymetry. Bathymetry in mid-speed mid-ocean ridges and part of slow spreading midocean ridges with sufficient magmatic supply may be related to the magmatic supply fluctuation period on the 100 ka time scale. seafloor bathymetry in most of the slow-spreading mid-ocean ridges is not affected by magmatic supply fluctuation period of 100 ka or less.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/155486
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: 1.北京大学地球与空间科学学院
2.北京大学石油与天然气研究中心, 造山带与地壳演化教育部重点实验室
3.,
4., 北京
5.北京 100871
6.100871, 中国

Recommended Citation:
贠晓瑞,李江海,吴桐雯,等. 海底地形对不同时间尺度岩浆供给变化的响应[J]. 北京大学学报. 自然科学版,2019-01-01,55(3):7931-7940
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[贠晓瑞]'s Articles
[李江海]'s Articles
[吴桐雯]'s Articles
百度学术
Similar articles in Baidu Scholar
[贠晓瑞]'s Articles
[李江海]'s Articles
[吴桐雯]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[贠晓瑞]‘s Articles
[李江海]‘s Articles
[吴桐雯]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.