DOI: 10.1002/2014GL062993
论文题名: Magma production rate along the Ninetyeast Ridge and its relationship to Indian plate motion and Kerguelen hot spot activity
作者: Sreejith K.M. ; Krishna K.S.
刊名: Geophysical Research Letters
ISSN: 0094-8951
EISSN: 1944-8682
出版年: 2015
卷: 42, 期: 4 起始页码: 1105
结束页码: 1112
语种: 英语
英文关键词: Indian plate motion
; Kerguelen hot spot
; magma production
; Ninetyeast Ridge
; ridge jumps
Scopus关键词: Solitons
; Atlantic Ocean
; Crustal thickness
; Hot spot
; Indian plate
; Ninetyeast Ridge
; Production phasis
; Production rates
; Ridge jumps
; Structural geology
; African plate
; Indian plate
; magma
; mantle plume
; plate motion
; plate tectonics
; solitary wave
; velocity profile
; Atlantic Ocean
; French Southern Territories
; Indian Ocean
; Kerguelen
; Kerguelen Islands
; Ninetyeast Ridge
; Walvis Ridge
英文摘要: The Ninetyeast Ridge, a linear trace of the Kerguelen hot spot in the Indian Ocean, was emplaced on a rapidly drifting Indian plate. Magma production rates along the ridge track are computed using gravity-derived excess crustal thickness data. The production rates change between 2 and 15 m3/s over timescales of 3-16 Myr. Major variations in magma production rates are primarily associated with significant changes in the Indian plate velocity with low-production phases linked to high plate velocity periods. The lowest magma production rate (2 m3/s) at 62 Ma is associated with the rapid northward drift of Indian plate under the influence of the Reunion mantle plume. The contemporaneous slowing of the African plate coincides with increase in magma production rate along the Walvis Ridge in the Atlantic Ocean. The present study suggests that variations in the Indian plate motion and frequent ridge jumps have a major role in controlling the magma production, particularly on long-period cycles (~16 Myr). Short-period variations (~5 Myr) in magma productions may be associated with intrinsic changes in the plume, possibly due to the presence of solitary waves in the plume conduit. Key Point Variations in magma flux along Ninetyeast Ridge ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924911138&doi=10.1002%2f2014GL062993&partnerID=40&md5=5882d799aaabe189c9f663f9963f831f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8567
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Geosciences Division, Geosciences and Applications Group, Space Applications Center (ISRO), Gujrat, Ahmedabad, India
Recommended Citation:
Sreejith K.M.,Krishna K.S.. Magma production rate along the Ninetyeast Ridge and its relationship to Indian plate motion and Kerguelen hot spot activity[J]. Geophysical Research Letters,2015-01-01,42(4).