Results 1 to 10 of about 581,348 (195)
Slab melting versus slab dehydration in subduction-zone magmatism. [PDF]
Proc Natl Acad Sci U S A, 2011 The second critical endpoint in the basalt-H 2 O system was directly determined by a high-pressure and high-temperature X-ray radiography technique. We found that the second critical endpoint occurs at around 3.4 GPa and 770 °C (corresponding to a depth of approximately 100 km in a subducting slab), which is much ...
Mibe K +4 more
europepmc +5 more sources
Slab melting boosts the mantle wedge contribution to Li-rich magmas [PDF]
Scientific ReportsThe lithium cycling in the supra-subduction mantle wedge is crucial for understanding the generation of Li-rich magmas that may potentially source ore deposition in continental arcs.
Erwin Schettino +9 more
doaj +8 more sources
Slab melting as a barrier to deep carbon subduction [PDF]
Nature, 2016 Interactions between crustal and mantle reservoirs dominate the surface inventory of volatile elements over geological time, moderating atmospheric composition and maintaining a life-supporting planet. While volcanoes expel volatile components into surface reservoirs, subduction of oceanic crust is responsible for replenishment of mantle reservoirs ...
Thomson, Andrew R +3 more
openaire +6 more sources
Melting of subducted slab dictates trace element recycling in global arcs [PDF]
Science Advances, 2022 Temperature-dependent trace element fractionation during melting of subducted slab can explain the composition of arc magmas.
Huijuan Li, Joerg Hermann, Lifei Zhang
openaire +3 more sources
Melting at the Edge of a Slab in the Deepest Mantle [PDF]
Geophysical Research Letters, 2019 AbstractWe analyzed new recordings of SPdKS seismic waveforms from a global set of broadband seismograms and horizontal tiltmeters from the Hi‐net array in Japan from 26 earthquakes in the Central American region. The anomalous waveforms are consistent with the presence of at least three ultralow‐velocity zones (ULVZs), on the core‐mantle boundary ...
Michael S. Thorne +2 more
openaire +3 more sources
Lithos, 2020 Slab-melting is considered to have played an important role in the formation of continental crust. The combination of oxygen (O) and hafnium (Hf) isotope signatures can provide key information relating to the melting components during slab-melting.
Kazue Suzuki +2 more
exaly +2 more sources
Unraveling the diversity of Arc volcanism and deep low-frequency tremors in Southwest Japan from numerical modeling [PDF]
Scientific ReportsDifferences in slab dehydration and fluid transport influence the distribution of magmatism and deep low-frequency tremors in subduction zones. Southwest Japan, particularly Kyushu and Shikoku/Chugoku, exhibits significant along-arc variation in the ...
Goeun Ha, Changyeol Lee, YoungHee Kim
doaj +2 more sources
Arc magma formation through the fluid-fluxed mélange melting in subduction zones [PDF]
Nature CommunicationsThe transport of subducted slab materials to the overlying mantle plays a crucial role in arc magma formation. However, the contributions of aqueous fluids, hydrous melts, or mélange to the convective mantle remain controversial due to the lack of ...
Wei Zhang +4 more
doaj +2 more sources
Tracing dehydration and melting of the subducted slab with tungsten isotopes in arc lavas
Earth and Planetary Science Letters, 2020 Tungsten is strongly incompatible during magmatic processes and is fluid mobile in subduction zones. Here we show that W isotope fractionation in arc lavas provide a powerful new tool for tracing slab dehydration and melting in subduction zones ...
Sarah E Mazza +2 more
exaly +2 more sources
Can slab melting be caused by flat subduction?
Geology, 2000 Slab melting has been suggested as a likely source of adakitic arc magmas (i.e., andesitic and dacitic magmas strongly depleted in Y and heavy rare earth elements). Existing numerical and petrologic models, however, restrict partial melting to very young (≤ 5 Ma) oceanic crust (typically at 60–80 km depth).
Gutscher, M.A. +3 more
openaire +3 more sources