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Evidence for Multi-stage Melt Transport in the Lower Ocean Crust: the Atlantis Bank Gabbroic Massif (IODP Hole U1473A, SW Indian Ridge)

文献类型：期刊论文

作者Zhang, Wei-Qi1,4,5; Liu, Chuan-Zhou2,4,5,6; Dick, Henry J. B.1,3
刊名JOURNAL OF PETROLOGY
出版日期2020-09-01
卷号61期号:9页码:33
关键词melt-rock reaction oceanic crustal accretion permeable melt transport syn-magmatic deformation ultraslow-spreading ridge
ISSN号0022-3530
DOI10.1093/petrology/egaa082
英文摘要The architecture of lower oceanic crust at slow- and ultraslow-spreading ridge is diverse, yet the mechanisms that produce this diversity are not well understood. Particularly, the 660-km(2) gabbroic massif at Atlantis Bank (Southwest Indian Ridge) exhibits significant compositional zonation, representing a high magma supply end member for accretion of the lower ocean crust at slow and ultraslow-spreading ridges. We present the petrographic and geochemical data of olivine gabbros from the 809-metre IODP Hole U1473A at Atlantis Bank gabbroic massif. Structurally, the upper portion of U1473A consists of a similar to 600-metre shear zone; below this, the hole is relatively undeformed, with several minor shear zones. Olivine gabbros away from the shear zones have mineral trace element compositions indicative of high-temperature reaction with an oxide-undersaturated melt. By contrast, olivine gabbros within shear zones display petrographic and chemical features indicative of reaction with a relatively low-temperature, oxide-saturated melt. These features indicate an early stage of primitive to moderately evolved melt migration, followed by deformation-driven transport of highly evolved Fe-Ti-rich melts to high levels in this gabbroic massif. The close relationship between shear zones and the reaction with oxide-saturated melts suggests that syn-magmatic shear zones provide a conduit for late-stage, Fe-Ti-rich melt transport through Atlantis Bank lower crust. This process is critical to generate the compositional zonation observed. Thus, the degree of syn-magmatic deformation, which is fundamentally related to magma supply, plays a dominant role in developing the diversity of lower ocean crust observed at slow- and ultraslow-spreading ridges.
资助项目Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020301] ; National Natural Science Foundation of China[41673038] ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology[MGQNLM201702] ; US National Science Foundation[OCE-1637130]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000634894800002
出版者OXFORD UNIV PRESS
资助机构Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation of Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation ; US National Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/101151]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang, Wei-Qi
作者单位1.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Wei-Qi,Liu, Chuan-Zhou,Dick, Henry J. B.. Evidence for Multi-stage Melt Transport in the Lower Ocean Crust: the Atlantis Bank Gabbroic Massif (IODP Hole U1473A, SW Indian Ridge)[J]. JOURNAL OF PETROLOGY,2020,61(9):33.
APA Zhang, Wei-Qi,Liu, Chuan-Zhou,&Dick, Henry J. B..(2020).Evidence for Multi-stage Melt Transport in the Lower Ocean Crust: the Atlantis Bank Gabbroic Massif (IODP Hole U1473A, SW Indian Ridge).JOURNAL OF PETROLOGY,61(9),33.
MLA Zhang, Wei-Qi,et al."Evidence for Multi-stage Melt Transport in the Lower Ocean Crust: the Atlantis Bank Gabbroic Massif (IODP Hole U1473A, SW Indian Ridge)".JOURNAL OF PETROLOGY 61.9(2020):33.

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