Results 61 to 70 of about 552,470 (226)

Depth-dependent peridotite-melt interaction and the origin of variable silica in the cratonic mantle

Nature Communications, 2021
The compositional variability amongst Archaean cratonic peridotites has long been recognized, however its origin remains debated. The authors here find that the collapse of the dual Archaean mantle melting environment ceased production of silica-enriched
Emma L. Tomlinson, Balz S. Kamber
doaj   +1 more source

A eutectic parameterization of mantle melting.

Journal of Physics of the Earth, 1990
In an earlier paper the variation of melt fraction with temperature near the solidus of a rock with the composition of a garnet peridotite was parameterized as a continuous function of temperature. A number of people have suggested that eutectic melting is a better description of the behaviour near the solidus.
McKenzie, Dan, Bickle, Mike J.
openaire   +2 more sources

Reduced compression time is not sufficient for stability in patellar buttons

Knee Surgery, Sports Traumatology, Arthroscopy, EarlyView.
Abstract Purpose Patellar resurfacing in total knee arthroplasty requires stable cement fixation of the patellar button. Unlike femoral and tibial components, the patellar button is held under manual compression until cement curing, potentially prolonging operative time.
Leandra Bauer, Johannes Gramzow, Matthias Brensing, Benjamin Bartz, Matthias Woiczinski, Georg Matziolis   +5 more
wiley   +1 more source

Gas check prevention during calendering of poly(vinyl chloride) films using poly(caprolactone)‐based additives

Journal of Vinyl and Additive Technology, Volume 31, Issue 2, Page 441-452, March 2025.
Three poly(caprolactone) (PCL)‐based additives of differing molecular weights were used as a secondary plasticizer to prevent gas checks in PVC films produced through calendering. Results showed that chemical and physicochemical properties influence the prevention or reduction of gas checks, unlike rheological properties including complex viscosity and
Luis F. Alvarez, Kushal Panchal, Richard L. Leask, Milan Maric, Jim A. Nicell   +4 more
wiley   +1 more source

The constant oxidation state of Earth’s mantle since the Hadean

Nature Communications
Determining the evolutionary history of mantle oxygen fugacity (fo2) is crucial, as it controls the fo2 of mantle-derived melts and regulates atmospheric composition through volcanic outgassing. However, the evolution of mantle fo2 remains controversial.
Fangyi Zhang, Vincenzo Stagno, Lipeng Zhang, Chen Chen, Haiyang Liu, Congying Li, Weidong Sun   +6 more
doaj   +1 more source

Do Olivine Crystallization Temperatures Faithfully Record Mantle Temperature Variability?

Geochemistry, Geophysics, Geosystems, 2021
Crystallization temperatures of primitive olivine crystals have been widely used as both a proxy for, or an intermediate step in calculating, mantle temperatures. The olivine‐spinel aluminum‐exchange thermometer has been applied to samples from mid‐ocean
Simon Matthews, Kevin Wong, Oliver Shorttle, Marie Edmonds, John Maclennan   +4 more
doaj   +1 more source

A high‐energy X‐ray beamline for materials science research at SPring‐8: BL15XU

Journal of Synchrotron Radiation, EarlyView.
The Japanese synchrotron facility SPring‐8 has recently relaunched BL15XU as a high‐energy X‐ray beamline for materials science research. A comprehensive description of the technical details and science cases is presented.The high‐energy X‐ray beamline BL15XU is designed to drive advancements in materials science and high‐pressure research by ...
Hiroyuki Ohsumi, Yuji Higo, Yujiro Hayashi, Jaemyung Kim, Noriyoshi Tsujino, Sho Kakizawa, Tetsuo Irifune, Tomohiro Ohuchi, Yoshio Kono, Hirokatsu Yumoto, Takahisa Koyama, Hiroshi Yamazaki, Yasunori Senba, Haruhiko Ohashi, Hidekazu Takano, Michihiro Sugahara, Taito Osaka, Makina Yabashi   +17 more
wiley   +1 more source

Deep mantle anomalies block early Earth melting, challenging a primordial origin

Scientific Reports
Earth’s deep mantle hosts enigmatic structures known as Large Low Velocity Provinces (LLVPs), which sit atop the core–mantle boundary and influence mantle dynamics and plume generation.
Arnab Roy, Eric Mittelstaedt, C. M. Cooper   +2 more
doaj   +1 more source

Global-scale modelling of melting and isotopic evolution of Earth's mantle: melting modules for TERRA [PDF]

Geoscientific Model Development, 2016
Many outstanding problems in solid-Earth science relate to the geodynamical explanation of geochemical observations. Currently, extensive geochemical databases of surface observations exist, but satisfying explanations of underlying mantle processes are ...
H. J. van Heck, J. H. Davies, T. Elliott, D. Porcelli   +3 more
doaj   +1 more source

Extraocular Photoreception in Optic Lobes, Suckers, and Skin of Octopus vulgaris

Integrative Zoology, EarlyView.
Evidence of extra‐ocular photoreception in Octopus vulgaris (a) Diagram of the O. vulgaris different tissues considered: SPB, sucker proximal big; SPL, sucker proximal large; SM, sucker medium; SD, sucker distal; SK, skin; OL, optic lobes; RT, retina; (b‐d) Gene expression analysis of Ov‐GRK1 (red), Ov‐retinochrome (green), Ov‐rhodopsin (blue) mRNA ...
Valeria Maselli, Al‐Sayed Al‐Soudy, Mariangela Norcia, Stefania Galdiero, Sara Palladino, Emanuela Cirillo, Gianluca Polese, Anna Di Cosmo   +7 more
wiley   +1 more source