Results 91 to 100 of about 220,882 (295)

Mid-mantle deformation inferred from seismic anisotropy [PDF]

, 2002
With time, convective processes in the Earth's mantle will tend to align crystals, grains and inclusions. This mantle fabric is detectable seismologically, as it produces an anisotropy in material properties—in particular, a directional dependence in ...
A Yeganeh-Haeri, AE Ringwood, AR Oganov, C Tong, CJ Wolfe, CP Meade, D Mainprice, DL Anderson, G Barruol, G Clitheroe, Guilhem Barruol, J-M Kendall, J-M Kendall, J-P Montagner, J-P Montagner, J.-Michael Kendall, James Wookey, JB Gaherty, JX Mitrovica, K Fischer, K Hirose, L Stixrude, LP Vinnik, LP Vinnik, MJ Fouch, MK Savage, NJ Kusznir, PG Silver, PG Silver, R Van der Hilst, S Karato, S Karato, S Widiyantoro, S Özalaybey, SH Kirby   +34 more
core   +4 more sources

Geochemical and Geological Investigation of Skarn‐Type Pb–Zn Mineralization in Hastanetepe (Balya‐Balıkesir, Türkiye): An Approach Based on Fluid Inclusions, Sulphur Isotopes and Geochemical Data

Geological Journal, EarlyView.
Integrated petrographic, mineralogical and geochemical data from the Hastanetepe Pb–Zn deposit (Balya, Türkiye) reveal multi‐stage hydrothermal alteration and a magmatic sulphur source. Fluid inclusion and sulphur isotope results indicate a complex fluid evolution responsible for skarn‐type Pb–Zn mineralization along limestone–dacite contacts ...
Esra Ünal‐Çakır
wiley   +1 more source

Strong plates enhance mantle mixing in early Earth

Nature Communications, 2018
The subducting plates can either penetrate straight into the lower mantle or flatten in the mantle transition zone, yet slab dynamics in the past remains unclear.
Roberto Agrusta, Jeroen van Hunen, Saskia Goes   +2 more
doaj   +1 more source

Capturing the Multi‐Decadal Evolution of Glacier–Permafrost Interactions in a High‐Alpine Environment (Ritord, Western Swiss Alps)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT This study investigates the multi‐decadal evolution of a glacier forefield under permafrost conditions in the Combins Massif (western Swiss Alps). A multi‐method approach based on historical and recent datasets is used to analyze its landform components.
Julie Wee, Hanne Hendrickx, Sebastián Vivero   +2 more
wiley   +1 more source

Evolving force balance during incipient subduction [PDF]

, 2004
Nearly half of all active subduction zones initiated during the Cenozoic. All subduction zones associated with active back arc extension have initiated since the Eocene, hinting that back arc extension may be intimately associated with an interval ...
Gurnis, Michael, Hall, Chad, Lavier, Luc
core   +1 more source

Primordial and recycled helium isotope signatures in the mantle transition zone

Science, 2019
Diamond window into the deep mantle Helium isotopes provide a window into the very deepest and oldest parts of Earth's voluminous mantle. However, several processes tend to obscure the helium isotope signal from reservoirs in basaltic lavas that have ...
S. Timmerman, M. Honda, Antony D. Burnham, Y. Amelin, S. Woodland, D. Pearson, A. Jaques, C. Losq, Vickie C. Bennett, G. Bulanova, Christopher B. Smith, J. Harris, E. Tohver   +12 more
semanticscholar   +1 more source

In Situ Investigation of Microstructure Evolution and Stress Generation During Low‐Pressure Carburizing and Quenching by Means of Synchrotron X‐Ray Diffraction

steel research international, EarlyView.
This study uses in situ synchrotron X‐ray diffraction at the German Electron Synchrotron to analyze low‐pressure carburizing (LPC) in steels. The findings reveal surface carbon saturation and carbide formation kinetics, and phase‐specific stress development during quenching. The results show carbide kinetics depend on steel grade and size, while stress
Ogün Baris Tapar, Michael Georg Zürn, Jens Gibmeier, Antonio Carlos de Figueiredo Silveira, Matthias Steinbacher, Norbert Schell, Jérémy Epp   +6 more
wiley   +1 more source

Exploring the Impact of Polystyrene Microplastic Beads on Male Gonads of the Marine Mussel, Mytilus galloprovincialis

Environmental Toxicology, EarlyView.
ABSTRACT Plastic, with its remarkable versatility and numerous applications, has greatly benefited humanity. However, its extreme resistance to natural degradation means it persists in the environment for long periods, causing global environmental problems.
Teresa Chianese, Mariachiara Galati, Tiziana Cappello, Maria Maisano, Gennaro Lettieri, Carmela Marinaro, Marina Piscopo, Gianluca Fasciolo, Carlos Gravato, Gaetana Napolitano, Giulia Paolella, Annamaria Locascio, Rosaria Scudiero, Luigi Rosati   +13 more
wiley   +1 more source

The Forthcoming General Election in the Republic of Ireland: Winds of (Left‐Wing) Change or Plus Ça Change?

The Political Quarterly, Volume 96, Issue 1, Page 180-188, January/March 2025.
Abstract The forthcoming general election will be the most consequential electoral contest for the Republic of Ireland in a century. The polity is situated in truly novel territory with the potential for an historic first: the incoming of a Sinn Féin‐led, left‐wing government.
Chris Ó Rálaigh
wiley   +1 more source

Kinetic Control on the Depth Distribution of Superdeep Diamonds

Geophysical Research Letters, 2019
Superdeep diamonds contain unique information from the sublithospheric regions of Earth's interior. Recent studies suggest that reaction between subducted carbonate and iron metal in the mantle plays an important role in the production of superdeep ...
Feng Zhu, Jie Li, Jiachao Liu, Xiaojing Lai, Bin Chen, Yue Meng   +5 more
doaj   +1 more source