Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL072008 |
Rough versus smooth topography along oceanic hotspot tracks: Observations and scaling analysis | |
Orellana-Rovirosa, Felipe; Richards, Mark | |
2017-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Some hotspot tracks are topographically smooth and broad (Nazca, Carnegie/Cocos/Galapagos, Walvis, Iceland), while others are rough and discontinuous (Easter/Sala y Gomez, Tristan-Gough, Louisville, St. Helena, Hawaiian-Emperor). Smooth topography occurs when the lithospheric age at emplacement is young, favoring intrusive magmatism, whereas rough topography is due to isolated volcanic edifices constructed on older/thicker lithosphere. The main controls on the balance of intrusive versus extrusive magmatism are expected to be the hotspot swell volume flux Q(s), plate hotspot relative speed v, and lithospheric elastic thickness T-e, which can be combined as a dimensionless parameter R=(Q(s)/v)(1/2)/T-e, which represents the ratio of plume heat to the lithospheric heat capacity. Observational constraints show that, except for the Ninetyeast Ridge, R is a good predictor of topographic character: for R<1.5 hotspot tracks are topographically rough and dominated by volcanic edifices, whereas for R>3 they are smooth and dominated by intrusion. |
英文关键词 | mantle plumes lithosphere topography scaling theory |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402143700014 |
WOS关键词 | EFFECTIVE ELASTIC THICKNESS ; HOT-SPOT SYSTEM ; RIO-GRANDE RISE ; SOUTH-ATLANTIC ; CRUSTAL STRUCTURE ; NINETYEAST RIDGE ; WORLDS OCEANS ; WALVIS RIDGE ; INDIAN-OCEAN ; COMPENSATION MECHANISMS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26804 |
专题 | 气候变化 |
作者单位 | Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Orellana-Rovirosa, Felipe,Richards, Mark. Rough versus smooth topography along oceanic hotspot tracks: Observations and scaling analysis[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(9). |
APA | Orellana-Rovirosa, Felipe,&Richards, Mark.(2017).Rough versus smooth topography along oceanic hotspot tracks: Observations and scaling analysis.GEOPHYSICAL RESEARCH LETTERS,44(9). |
MLA | Orellana-Rovirosa, Felipe,et al."Rough versus smooth topography along oceanic hotspot tracks: Observations and scaling analysis".GEOPHYSICAL RESEARCH LETTERS 44.9(2017). |
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