Dynamic Accretion Beneath a Slow-Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex
文献类型：期刊论文
| 作者 | Dick, H. J. B.26; MacLeod, C. J.25; Blum, P.24; Abe, N.23; Blackman, D. K.22; Bowles, J. A.21; Cheadle, M. J.20; Cho, K.19; Ciazela, J.18; Deans, J. R.2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 124期号:12页码:12631-12659 |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2018JB016858 |
| 英文摘要 | 809 deep IODP Hole U1473A at Atlantis Bank, SWIR, is 2.2 km from 1,508-mHole 735B and 1.4 from 158-m Hole 1105A. With mapping, it provides the first 3-D view of the upper levels of a 660-km(2) lower crustal batholith. It is laterally and vertically zoned, representing a complex interplay of cyclic intrusion, and ongoing deformation, with kilometer-scale upward and lateral migration of interstial melt. Transform wall dives over the gabbro-peridotite contact found only evolved gabbro intruded directly into the mantle near the transform. There was no high-level melt lens, rather the gabbros crystallized at depth, and then emplaced into the zone of diking by diapiric rise of a crystal mush followed by crystal-plastic deformation and faulting. The residues to mass balance the crust to a parent melt composition lie at depth below the center of the massif-likely near the crust-mantle boundary. Thus, basalts erupted to the seafloor from >1,550 mbsf. By contrast, the Mid-Atlantic Ridge lower crust drilled at 23 degrees N and at Atlantis Massif experienced little high-temperature deformation and limited late-stage melt transport. They contain primitive cumulates and represent direct intrusion, storage, and crystallization of parental MORB in thinner crust below the dike-gabbro transition. The strong asymmetric spreading of the SWIR to the south was due to fault capture, with the northern rift valley wall faults cutoff by a detachment fault that extended across most of the zone of intrusion. This caused rapid migration of the plate boundary to the north, while the large majority of the lower crust to spread south unroofing Atlantis Bank and uplifting it into the rift mountains. |
| WOS关键词 | SOUTHWEST INDIAN RIDGE ; THIN CRUST ; ULTRASLOW ; CONVECTION ; MECHANISM ; EVOLUTION ; ROCKS |
| 资助项目 | National Science Foundation (NSF)[OCE1434452] ; National Science Foundation (NSF)[OCE1637130] ; Investment in Science Fund at WHOI |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000512314000017 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Science Foundation (NSF) ; National Science Foundation (NSF) ; Investment in Science Fund at WHOI ; Investment in Science Fund at WHOI ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Investment in Science Fund at WHOI ; Investment in Science Fund at WHOI ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Investment in Science Fund at WHOI ; Investment in Science Fund at WHOI ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; Investment in Science Fund at WHOI ; Investment in Science Fund at WHOI |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95650]  |
| 专题 | 地质与地球物理研究所_其他部门 |
| 通讯作者 | Dick, H. J. B. |
| 作者单位 | 1.Okayama Univ, Dept Earth Sci, Okayama, Japan 2.Univ Southern Mississippi, Sch Biol Environm & Earth Sci, Hattiesburg, MS 39406 USA 3.Univ Brasilia, Inst Geociencias, Brasilia, DF, Brazil 4.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA 5.Univ Pavia, Dipartimento Sci Terra & Ambiente, Pavia, Italy 6.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands 7.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA 8.Univ Plymouth, Sch Geog Earth & Environm Sci, Plymouth, Devon, England 9.Kanazawa Univ, Coll Sci & Engn, Kanazawa, Ishikawa, Japan 10.Tongji Univ, Sch Ocean & Earth Sci, Shanghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dick, H. J. B.,MacLeod, C. J.,Blum, P.,et al. Dynamic Accretion Beneath a Slow-Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2019,124(12):12631-12659. |
| APA | Dick, H. J. B..,MacLeod, C. J..,Blum, P..,Abe, N..,Blackman, D. K..,...&Viegas, G..(2019).Dynamic Accretion Beneath a Slow-Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,124(12),12631-12659. |
| MLA | Dick, H. J. B.,et al."Dynamic Accretion Beneath a Slow-Spreading Ridge Segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core Complex".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 124.12(2019):12631-12659. |
入库方式： OAI收割
来源：地质与地球物理研究所
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