Faulting, magmatism and crustal oceanization of the Okinawa Trough

GAO Jin-yao; ZHANG Tao; FANG Yin-xia; YANG Chuan-guo; WANG Jun; TAN Yong-hua; MEI Sai

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GAO Jin-yao, ZHANG Tao, FANG Yin-xia, YANG Chuan-guo, WANG Jun, TAN Yong-hua, MEI Sai. Faulting, magmatism and crustal oceanization of the Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(5): 62-70.

Citation:

GAO Jin-yao, ZHANG Tao, FANG Yin-xia, YANG Chuan-guo, WANG Jun, TAN Yong-hua, MEI Sai. Faulting, magmatism and crustal oceanization of the Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(5): 62-70.

GAO Jin-yao, ZHANG Tao, FANG Yin-xia, YANG Chuan-guo, WANG Jun, TAN Yong-hua, MEI Sai. Faulting, magmatism and crustal oceanization of the Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(5): 62-70.

Citation:

GAO Jin-yao, ZHANG Tao, FANG Yin-xia, YANG Chuan-guo, WANG Jun, TAN Yong-hua, MEI Sai. Faulting, magmatism and crustal oceanization of the Okinawa Trough[J]. Haiyang Xuebao, 2008, 30(5): 62-70.

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Faulting, magmatism and crustal oceanization of the Okinawa Trough

Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Key Laboratory of Submarine Geosciences of State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

Received Date: 2008-01-23
Rev Recd Date: 2008-06-09

Abstract

Abstract

Characteristics of faulting and magmatism of the Okinawa Trough and the relationship between them were focused on.Enechelon grabens are ranked oblique to the continental shelf edge uplift,and the Longwang uplift,the rifting block ridge in the northern trough and the "Mianhua uplift" in the southern trough have possibly preserved characteristics of volcanism and magmatismo ccurred with those rifting phases.The Tokara volcanic arc can be traced to Taiwan along the west slope of the Ry ky island arc.The clockwise rotation of the southern Ry ky-gunt,driven by collision between Luzon and Taiwan,has played a key role in the crustal oceanization,enhancing the crustal extension of the southern trough and inducing volcanic magmatism in those grabens,among which the Yaeyama grabenis a typical example of the presence of oceanic crust.Faultingand magmatism were mainly migrating towards the island are asymme-trically.The crustal oceanization of the Okinawa Trough is difficultly interpreted by the linear magnetica-nomaly model,which is fit for the symmetric spreading of the mid-oceanic ridges.
- Okinawa Trough,
- fault,
- graben,
- uplift,
- oceanic crust,
- volcanic magma

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References(33)

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