Role of the deep mantle in generating the compositional asymmetry of the Hawaiian mantle plume

Weis, Dominique; Garcia, Michael O.; Rhodes, J. M.; Jellinek, M.; Scoates, James S.

doi:10.1038/ngeo1328

Cited by 200 publications

(278 citation statements)

References 96 publications

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“…Another explanation is that the pattern reflects an asymmetric zoning in the composition of the plume stem, which was inherited from the deep source [Hoernle et al, 2000]. A similar interpretation has been made for other hotspots, such as Hawai'i [Abouchami et al, 2005], and used to infer a connection between compositions at the surface and heterogeneity in the deep mantle [Farnetani and Hofman, 2010;Weis et al, 2011]. The aim of this study is to link the above observations to the fluid-dynamics of plume-ridge interaction at the Galápagos system.…”

mentioning

confidence: 57%

Patterns in Galápagos Magmatism Arising from the Upper Mantle Dynamics of Plume‐Ridge Interaction

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Bianco

2014

The Galápagos

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mentioning

confidence: 57%

Patterns in Galápagos Magmatism Arising from the Upper Mantle Dynamics of Plume‐Ridge Interaction

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Bianco

2014

The Galápagos

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“…Thus, the geochemical difference between Loa and Kea lavas may be related to an asymmetric rise of the hottest eclogite-bearing plume core through the upper mantle rather than to a bilateral asymmetry of the deep plume conduit with distinct materials on the two sides ( On a more detailed level, trends in major-element versus isotope-ratio space have been interpreted as evidence for the presence of a second mafic component in the source, in addition to the pyroxenitic and peridotitic components modeled (Jackson et al, 2012). Such a more complex source composition is supported by the distinct slopes of the different volcanoes' trends in 208 Pb/ 204 Pb versus 206 Pb/ 204 Pb (Weis et al, 2011). Whether the data require the distribution of two independent mafic components to be bilaterally asymmetric even in the conduit of a thermochemical plume that is rising with a complex, asymmetric form such as our models predict remains to be tested.…”

Section: Thermochemical Plume Dynamics In the Upper Mantlementioning

confidence: 82%

“…1) (Abouchami et al, 2005;Greene et al, 2010;Huang et al, 2011;Weis et al, 2011). Variations in the form and position of the upwelling plume above the DEP cause the drainage pattern of the DEP to be episodically strongly asymmetric in case B; material predominantly rises out of the DEP from where it has accumulated, and not necessarily from directly above the deep plume conduit ( Fig.…”

Section: Thermochemical Plume Dynamics In the Upper Mantlementioning

confidence: 99%

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Double layering of a thermochemical plume in the upper mantle beneath Hawaii

Ballmer

Ito

Wolfe

et al. 2013

Earth and Planetary Science Letters

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“…The most important recent result of Hawaiian studies is resurrection of the concept of an asymmetrical mantle plume in which volcanoes along two en echelon trends, the Loa and Kea trends, exhibit distinct major element and isotopic compositions (Abouchami et al, 2005;Weis et al, 2011). This asymmetry in plume source components is attributed to asymmetry in the lowermost mantle preserved in the melting zone within the plume (Weis et al, 2011;Farnetani et al, 2012).…”

Section: Mauna Loa Project (White Paper By Rhodes)mentioning

confidence: 99%

Drilling to investigate processes in active tectonics and magmatism

et al. 2014

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Abstract. Coordinated drilling efforts are an important method to investigate active tectonics and magmatic processes related to faults and volcanoes. The US National Science Foundation (NSF) recently sponsored a series of workshops to define the nature of future continental drilling efforts. As part of this series, we convened a workshop to explore how continental scientific drilling can be used to better understand active tectonic and magmatic processes. The workshop, held in Park City, Utah, in May 2013, was attended by 41 investigators from seven countries. Participants were asked to define compelling scientific justifications for examining problems that can be addressed by coordinated programs of continental scientific drilling and related site investigations. They were also asked to evaluate a wide range of proposed drilling projects, based on white papers submitted prior to the workshop.Participants working on faults and fault zone processes highlighted two overarching topics with exciting potential for future scientific drilling research: (1) the seismic cycle and (2) the mechanics and architecture of fault zones. Recommended projects target fundamental mechanical processes and controls on faulting, and range from induced earthquakes and earthquake initiation to investigations of detachment fault mechanics and fluid flow in fault zones. Participants working on active volcanism identified five themes: the volcano eruption cycle; eruption sustainability, near-field stresses, and system recovery; eruption hazards; verification of geophysical models; and interactions with other Earth systems. Recommended projects address problems that are transferrable to other volcanic systems, such as improved methods for identifying eruption history and constraining the rheological structure of shallow caldera regions. Participants working on chemical geodynamics identified four major themes: large igneous provinces (LIPs), ocean islands, continental hotspot tracks and rifts, and convergent plate margins (subduction zones).This workshop brought together a diverse group of scientists with a broad range of scientific experience and interests. A particular strength was the involvement of both early-career scientists, who will initiate and carry out these new research programs, and more senior researchers with many years of experience in scientific drilling and active tectonics research. Each of the themes and questions outlined above has direct benefits to society, including improving hazard assessment, direct monitoring of active systems for early warning, renewable and non-renewable resource and energy exploitation, and predicting the environmental impacts of natural hazards, emphasizing the central role that scientific drilling will play in future scientific and societal developments.

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Role of the deep mantle in generating the compositional asymmetry of the Hawaiian mantle plume

Cited by 200 publications

References 96 publications

Patterns in Galápagos Magmatism Arising from the Upper Mantle Dynamics of Plume‐Ridge Interaction

Patterns in Galápagos Magmatism Arising from the Upper Mantle Dynamics of Plume‐Ridge Interaction

Double layering of a thermochemical plume in the upper mantle beneath Hawaii

Drilling to investigate processes in active tectonics and magmatism

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