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Earth and Planetary Science Letters
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17897
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#1Zhuosen Yao (Carleton University)H-Index: 2
#2James E. Mungall (Carleton University)H-Index: 25
Abstract The motion of dense Fe-rich immiscible sulphide liquids is generally supposed to be dominated by gravitational settling in crustal magma chambers, however they may become buoyant by attachment to low-density vapour bubbles to form compound drops, possibly contributing to the upward transfer of sulphur and transition metals in degassing magma bodies. Here, using numerical models, we consider constraints on the flotation of compound drops, and find a wide range of morphologies that would ...
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#1Carlos Peña (FU: Free University of Berlin)H-Index: 1
#2Oliver HeidbachH-Index: 26
Last. Onno Oncken (FU: Free University of Berlin)H-Index: 43
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Abstract After large earthquakes at subduction zones, the plate interface continues moving due to mostly frictional afterslip or simply afterslip processes. Below approximately 60 km depth, the seismic moment release at the plate interface is quite small indicating that the shear strength is low and stable sliding is the prevailing process. This agrees with the lack of significant interseismic locking at deeper segments (>60 km) resulting from the inversion of geodetic data and thus low aftersli...
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#1Hauke Vollstaedt (University of Bern)H-Index: 7
#2Klaus Mezger (University of Bern)H-Index: 63
Last. Ingo Leya (University of Bern)H-Index: 30
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Abstract The Moon and Earth share similar relative abundances and isotope compositions of refractory lithophile elements, indicating that the Moon formed from a silicate reservoir that is chemically indistinguishable from the Earth's primitive silicate mantle. In contrast, most volatile elements are depleted in lunar mare basalts compared to Earth's mantle and differ in their isotope composition. However, the depletion of volatile elements is not a simple function of their condensation temperatu...
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#1Jens Barosch (University of Cologne)H-Index: 1
#2Denton S. Ebel (Columbia University)H-Index: 2
Last. Herbert PalmeH-Index: 43
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Abstract The study of chondritic meteorites and their components allows us to understand processes and conditions in the protoplanetary disk. Chondrites with high and about equal proportions of chondrules and matrix are ideal candidates to not only study the formation conditions of chondrules, but also the relationship between these two major components. An important question is whether these formed in the same or in separate reservoirs in the protoplanetary disk. So far, such studies have been ...
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#1Benjamin F. Chao (AS: Academia Sinica)H-Index: 29
#2Yongjae Yu (UCSD: University of California, San Diego)H-Index: 23
Abstract The westward-propagating rotary wave-2 displacement field in the mantle with the period of 6 years ( Ding and Chao, 2018 ) predicts an ensuing 6-year variation in the Earth's two equatorial principle moments of inertia. In this paper we search for such signals in the sectoral Stokes coefficients C 22 and S 22 of the Earth's gravitational field. We analyze the monthly Δ C 22 and Δ S 22 data series derived from the satellite laser-ranging measurements for 1992-2018 (and the shorter series...
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Abstract New bathymetric and gravity mapping, refined volume calculations and petrologic analyses show that the Hawaiian volcano Pūhāhonu is the largest and hottest shield volcano on Earth. This ∼12.5-14.1 Ma volcano in the northwest Hawaiian Ridge (NWHR) is twice the size of Mauna Loa volcano (148 ± 29 vs. 74.0 × 10 3 km 3 ), which was assumed to be not only the largest Hawaiian volcano but also the largest known shield volcano. We considered four testable mechanisms to increase magma productio...
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#1Qiliang Sun (China University of Geosciences)H-Index: 12
#2Craig Magee (University of Leeds)H-Index: 14
Last. Xinong Xie (China University of Geosciences)H-Index: 1
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Abstract Deep-water volcanoes are emplaced in water depths >1.0 km and are widespread along continental margins and in ocean basins. Whilst the external morphology of deep-water volcanoes can be mapped using bathymetric surveys, their internal structure and true volume remain enigmatic. It is thus difficult to determine how deep-water volcanoes grow. We investigate 13 Late Miocene-to-Quaternary, deep-water volcanoes that are imaged in 3D by seismic reflection data from the northern South China S...
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#1Saeed Roshan (UM: University of Miami)H-Index: 9
#2Tim DeVries (UCSB: University of California, Santa Barbara)H-Index: 17
Last. Thomas Weber (UR: University of Rochester)H-Index: 8
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Abstract Recent studies suggest that seafloor hydrothermal vents could be an important source of iron (Fe) to the surface ocean, stimulating plankton growth and biological carbon export. However, quantifying the supply of hydrothermal Fe to the surface ocean requires accurately modeling its stabilization and removal processes, which are poorly known. Here, we determine the physical speciation of dissolved Fe along an oceanographic transect following a coherent hydrothermal plume that emanates fr...
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#1David R. Jones (University of Cambridge)H-Index: 26
#2John F. Rudge (University of Cambridge)H-Index: 16
Abstract Partial melting of asthenospheric mantle generates magma that supplies volcanic systems. The timescale of melt extraction from the mantle has been hotly debated. Microstructural measurements of permeability typically suggest relatively slow melt extraction (1 m/yr) whereas geochemical (Uranium-decay series) and geophysical observations suggest much faster melt extraction (100 m/yr). The deglaciation of Iceland triggered additional mantle melting and magma flux at the surface. The rapid ...
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#1M. J. Hoggard (Harvard University)H-Index: 8
#2Ross Parnell-Turner (UCSD: University of California, San Diego)H-Index: 7
Last. Nicky White (University of Cambridge)H-Index: 40
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Abstract Mantle convection is the principal mechanism by which heat is transferred from the deep Earth to the surface. Cold subducting slabs sink into the mantle and steadily warm, whilst upwelling plumes carry heat to the base of lithospheric plates where it can subsequently escape by conduction. Accurate estimation of the total heat carried by these plumes is important for understanding geodynamic processes and Earth's thermal budget. Existing estimates, based upon swell geometries and velocit...
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Top fields of study
Geomorphology
Geology
Basalt
Geochemistry
Mineralogy
Mantle (geology)
Geophysics