Results 61 to 70 of about 7,713 (173)

Geodynamic Controls on Mantle Differentiation and Preservation of Long‐Term Geochemical Heterogeneity: Focus on the Primitive Undegassed Mantle

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract The compositional evolution of the Earth's mantle is the result of mantle differentiation and thermal evolution. Partial melting of mantle materials produces geochemical heterogeneities, allows for degassing and depends on the thermal state of the mantle, itself governed by convection.
Nicolas Récalde, J. Huw Davies, James Panton, Don Porcelli, Morten Andersen   +4 more
wiley   +1 more source

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

Cumhuriyet Science Journal, 2019
In this research, the concentrations of natural (226Ra, 232Thand 40K) and anthropogenic (137Cs) radionuclides were measured in sedimentsamples collected from the Borçka Dam Lake using a high purity germaniumdetector (HPGe).
Murat Şirin
doaj   +1 more source

Experimental Hypervelocity Dust Impacts in Olivine—Multiscale Insights Into Microcrater Shock and Melting Effects From Coordinated SEM/TEM Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The flux of solar system meteoroids is dominated by objects less than 1 mm in diameter whose impact effects play a major role in the space weathering of airless body surfaces. These effects remain poorly characterized with respect to their dependence on the range of impact speeds for meteoroids across the inner solar system.
R. Christoffersen, M. J. Loeffler, S. Kanee, C. J. Cline II, L. P. Keller, T. M. Erickson, J. Fontanese, T. Munsat, M. Horányi   +8 more
wiley   +1 more source

Magnetic Evolution of Super‐Earth Exoplanets With a Basal Magma Ocean

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Habitability of super‐Earths likely requires self‐sustained magnetic fields to shield their atmospheres from stellar forcing. Extreme pressures and temperatures probably produce a long‐lived basal magma ocean (BMO), a potential source for these fields.
Victor Lherm, Miki Nakajima, Eric G. Blackman   +2 more
wiley   +1 more source

Seasonal variation of natural radioactivity in the environs of Kali River

Radiation Protection and Environment, 2018
The paper discusses the results of systematic studies of activity concentrations of the 226Ra, 232Th, and 40K in soil and sediment samples of Kali River, one of the major rivers of coastal Karnataka.
K M Rajashekara, V Prakash, Y Narayana
doaj   +1 more source

Electromagnetic transitions between odd parity states in 40K

Physics Letters B, 1970
Abstract Lifetimes of twelve levels in 40 K up to 2.63 MeV excitation have been measured. Effective moments and charges and configuration mixing are deduced from a shell model analysis of the transition rates between eight odd-parity states with comparatively simple particle-hole structure.
R. Bass, R. Wechsung
openaire   +1 more source

Borehole Logging Lithological Classification in Carbonatite‐Hosted Niobium Deposit Integrating Geophysical and Geochemical Data With Self‐Organizing Maps

Geophysical Prospecting, Volume 74, Issue 3, March 2026.
ABSTRACT Lithological classification from borehole data remains challenging in geologically complex alkaline–carbonatite systems, where compositional overlap and gradual transitions between lithotypes limit conventional interpretation methods. This study presents an integrated and automated workflow for drill‐core lithological classification using self‐
Fabrizzio R. Costa, Lívia Namie S. Nishimura, Reginaldo Antonio R. Filho, Bruno P. Milanezi, Dong Yaosong, Cleyton de C. Carneiro, Carina Ulsen   +6 more
wiley   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Reframing the Chipped Edge: Combining Materiality, Ontology, and Embodiment to Rethink Stone Tool‐Making and Human Conscious Behavior in the Paleolithic Past

Anthropology of Consciousness, Volume 37, Issue 1, Spring 2026.
ABSTRACT Combining different theoretical frameworks can lead to new insights into the role of material things in shaping human experience in the Paleolithic period. This paper first presents a historical review of three theoretical approaches in archaeology, anthropology, and the philosophy of mind: Material culture and materiality studies, the ...
Bar Efrati
wiley   +1 more source

No Difference in Face Scanning Patterns Between Monolingual and Bilingual Infants at 5 Months of Age

Developmental Science, Volume 29, Issue 2, March 2026.
ABSTRACT It has been suggested that bilinguals take greater advantage of visual speech cues than monolinguals. Therefore, in a sample of 474 (47.3% females) monolingual and 101 (48.5% females) bilingual infants at 5 months of age, we examined the tendency to look at the eyes versus the mouth of dynamic faces, as well as the latency and ratio of looking
Charlotte Viktorsson, Terje Falck‐Ytter   +1 more
wiley   +1 more source