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

ZHANG Jia-bao; JIN Xiang-long; GAO Jin-yao; ZHAO Li-hong

Marine Geology & Quaternary Geology > 2006 > 26(1): 67-74.

ZHANG Jia-bao, JIN Xiang-long, GAO Jin-yao, ZHAO Li-hong. INFLUENCE ON THE SEAMOUNTS' FORMATION IN MPM AND WPSP FROM FRACTURES AND CRETACEOUS MAGMA'S ACTIVITIES[J]. Marine Geology & Quaternary Geology, 2006, 26(1): 67-74.

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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

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Received Date: July 19, 2005
Revised Date: November 22, 2005

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Abstract

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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References (37)

References

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