Results 21 to 30 of about 59,876 (275)

Boninite and Harzburgite from Leg 125 (Bonin-Mariana Forearc): A Case Study of Magma Genesis during the Initial Stages of Subduction [PDF]

, 1992
Holes drilled into the volcanic and ultrabasic basement of the Izu-Ogasawara and Mariana forearc terranes during Leg 125 provide data on some of the earliest lithosphere created after the start of Eocene subduction in the Western Pacific.
Arculus, Richard J., Ishii, Teruaki, Murton, Bramley J., Parkinson, Ian J., Pearce, Julian A., Peate, David W., van der Laan, Sieger R.   +6 more
core   +1 more source

Noble Metals in Arc Basaltic Magmas Worldwide: A Case Study of Modern and Pre-Historic Lavas of the Tolbachik Volcano, Kamchatka

Frontiers in Earth Science, 2021
Platinum-group elements (PGE) and gold are a promising tool to assess the processes of mantle melting beneath the subduction zones. However, fractionation processes in magmas inevitably overwrite the initial metal budgets of magmas, making constraints on
Anton Kutyrev, Anton Kutyrev, Michael Zelenski, Nikolai Nekrylov, Nikolai Nekrylov, Dmitry Savelyev, Alkiviadis Kontonikas-Charos, Vadim S. Kamenetsky, Vadim S. Kamenetsky   +8 more
doaj   +1 more source

A subduction and mantle plume origin for Samoan volcanism

Scientific Reports, 2018
The origin of Samoan volcanism in the southwest Pacific remains enigmatic. Whether mantle melting is solely caused by a mantle plume is questionable because some volcanism, here referred to as non-hotspot volcanism, defies the plume model and its linear ...
Vincent Strak, Wouter P. Schellart
doaj   +1 more source

An assessment of the mantle and slab components in the magmas of an oceanic arc volcano: Raoul Volcano, Kermadec arc [PDF]

, 2009
Raoul Volcano occupies a simple oceanic subduction setting in the northern part of the Kermadec arc on the Pacific–Australian convergent plate boundary.
Price, Richard C., Smith, Ian E.M., Stewart, Robert B., Worthington, T.J.   +3 more
core   +2 more sources

Mantle thermal pulses below the Mid-Atlantic Ridge and temporal variations in the formation of oceanic lithosphere [PDF]

, 2003
A 20-Myr record of creation of oceanic lithosphere is exposed along a segment of the central Mid-Atlantic Ridge on an uplifted sliver of lithosphere. The degree of melting of the mantle that is upwelling below the ridge, estimated from the chemistry of ...
AC Lasaga, AL Jaques, BE Tucholke, BO Mysen, BY Kuo, CC Lundstrom, CG Potts, CJ Sotin, D Brunelli, DR Scott, DR Scott, DT Sandwell, DW Forsyth, DW Sparks, E Bonatti, E Hellebrand, EEE Hooft, G Choblet, G Hirth, GA Neumann, HJB Dick, I Reid, J Li, J Lin, J Phipps Morgan, J Phipps Morgan, JE Pariso, JM Auzende, K Kastens, KC Macdonald, KE Louden, KTM Johnson, L Gasperini, LS Magde, LS Magde, M Huang, M Seyler, M Spiegelman, M Spiegelman, MG Braun, PJ Michael, RA Prince, RS Detrick, SC Cande, WR Buck, WR Taylor, X Yang, Y Shen   +47 more
core   +2 more sources

MODEL OF DECOMPRESSION MELTING MECHANISM IN CONVECTIVE-UNSTABLE THERMAL LITHOSPHERE (FIRST APPROXIMATION)

Геодинамика и тектонофизика, 2021
We propose a model of decompression melting, separation, migration and freezing of the melt in the upper mantle during the convective instability process.
B. V. Lunev, V. V. Lapkovsky
doaj   +1 more source

Melt mapped inside Earth’s mantle

Nature, 2020
An analysis of seismic data reveals the location and quantity of melted rock, known as melt, in Earth’s upper mantle. The results show how these factors are correlated with the movement of the planet’s tectonic plates.
openaire   +2 more sources

Quartz-bearing rhyolitic melts in the Earth’s mantle

Nature Communications, 2022
AbstractThe occurrence of rhyolite melts in the mantle has been predicted by high pressure-high temperature experiments but never observed in nature. Here we report natural quartz-bearing rhyolitic melt inclusions and interstitial glass within peridotite xenoliths.
Dallai L.[1, 2, 3], Bianchini G.[4], Avanzinelli R.[5], Deloule E.[6], Natali C.[5, 7], Gaeta M.[1], Cavallo A.[8], Conticelli S.[5, 7]   +11 more
openaire   +4 more sources

Does depleted mantle form an intrinsic part of the Iceland plume? [PDF]

, 2003
Icelandic basalt ranges in composition from voluminous tholeiite, erupted in the rift zones, to small-volume, mildly alkaline basalt erupted off-axis.
Andrew D. Saunders, Björn S. Hardarson, Blichert-Toft, Breddam, Chauvel, Chauvel, Einarsson, Elliott, Fitton, Fitton, Furman, Gee, Hanan, Hanan, Hardarson, Hards, Hofmann, Hémond, J. Godfrey Fitton, Jakobsson, Johnson, Johnson, Kempton, Kempton, Kempton, Kerr, McDonough, Nowell, Pamela D. Kempton, Prestvik, Pálmason, Saunders, Schilling, Schilling, Skovgaard, Slater, Thirlwall, Zindler   +37 more
core   +1 more source

Ta'u and Ofu/Olosega volcanoes: The “Twin Sisters” of Samoa, their P, T, X melting regime, and global implications

Geochemistry, Geophysics, Geosystems, 2014
The Samoan islands of Ta'u and Ofu/Olosega (Ofol hereafter) are single shield volcanoes that have erupted alkali basalt for the past 70 and 440 kyr, respectively.
Stanley R. Hart, Matthew G. Jackson
doaj   +1 more source