断裂和白垩纪岩浆活动对中西太平洋海山区海山形成的影响

章家保; 金翔龙; 高金耀; 赵俐红

断裂和白垩纪岩浆活动对中西太平洋海山区海山形成的影响

章家保^1,2,
金翔龙^1,2,
高金耀^1,2,
赵俐红^2,3

1 国家海洋局第二海洋研究所, 杭州 310012;
2 国家海洋局海底科学重点实验室, 杭州 310012;
3 中国科学院海洋研究所, 青岛 266071

基金项目:

中国大洋协会国际海底区域研究开发"十五"资源勘查与评价项目(DY105-01-04-4)

详细信息

作者简介:
章家保(1980-),男,研究生,主要从事海洋地质与地球物理研究,E-mail:jiabaozhang@163.com

中图分类号: P736.12
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- 文章访问数: 1721
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出版历程
- 收稿日期: 2005-07-19
- 修回日期: 2005-11-22

INFLUENCE ON THE SEAMOUNTS' FORMATION IN MPM AND WPSP FROM FRACTURES AND CRETACEOUS MAGMA'S ACTIVITIES

1 Second Institute of Oceanography, SOA, Hangzhou 310012, China;
2 Key Laboratory of Submarine Geosciences, SOA, Hangzhou 310012, China;
3 Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

摘要

摘要: 断裂和岩浆活动影响着海山的形成及其基岩的分布类型。在总结中、西太平洋海山区的海山与构造分布特征、白垩纪大规模岩浆喷发事件、海山形成年代分布、海山与海底高原的岩性分布和GEOROC数据库样品的年代时序对比的基础上,分析了断裂和白垩纪岩浆活动的特点及其对中、西太平洋海山区海山形成的影响作用。研究认为:中、西太平洋海山区的洋壳在海山形成前受断裂带改造;受白垩纪大规模岩浆活动的影响,中、西太平洋海山区的海山约在87~89 Ma和120~123 Ma出现两个生长高峰期,并且在岩性上表现出与同期生成的海底高原相近。
- 断裂 /
- 岩浆活动 /
- 海山 /
- GEOROC /
- 中、西太平洋
Abstract: Seamounts' formation and their substrate rock types are influenced by the distributions of fractures and magma's[JP] activities. In this paper, we analyze characteristics of fractures and Cretaceous magma's activities and their influence on the formation of the seamounts in MPM and WPSP by generalizing distributions of the seamounts and geological structures, large-scale magma eruption events during Cretaceous,formation ages of the seamounts and plateaus and also composition and distribution of the rock samples in GEOROC database. The study made a conclusion that in MPM and WPSP, ocean crust was reworked by the fracture zones before the birth of the seamounts; and under the influence of the magma's activities in Cretaceous, the seamounts had two fastigiums of growth in 87~89 and 120~123 Ma or so, and their li thology characteristics are similar to those of the plateaus which were also formed in these periods.
- fracture /
- magma's activities /
- seamount /
- GEOROC /
- MPM and WPSP

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