Results 51 to 60 of about 2,514 (184)

Highly Enriched and Heterogeneous Mantle Signals Recorded in Mantle Pyroxenite Veins

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The Earth's mantle is inherently heterogeneous, reflecting ongoing mantle depletion and crustal recycling driven by plate tectonics. Radiogenic isotopes in oceanic basalts are commonly used to characterize mantle reservoirs, but the full chemical diversity of mantle‐derived melts may be obscured by magma mixing during melt transport and ...
Zhen‐Yu Zhang, Chuan‐Zhou Liu, Yan Liang, Tong Liu, Chang Zhang, Bo‐Da Liu, Wen‐Bin Ji, Wei‐Qi Zhang, Ke Huang   +8 more
wiley   +1 more source

Problems of the time of foundation and the tectonic evolution of the Onega — Kandalaksha paleorift in the light of the data of isotopic geochronology

Известия высших учебных заведений: Геология и разведка, 2018
Kandalaksha graben, located in the water-area of the White sea, is a part of the Onega-Kandalaksha paleorift of the Riphean time of foundation. It is filled with the terrigenous formations of the Terskaya suites ranging from 3 to 8 km by depth, while the
A. S. Baluev, S. Yu. Kolodyazhny, E. N. Terekhov, V. A. Lebedev, P. A. Serov   +4 more
doaj   +1 more source

Latitude Survey of Neutrons and Muons to Determine Cosmic Ray Neutron Sensing Yield Functions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic Ray Neutron Sensing (CRNS) is a ground‐based technique that utilizes epithermal neutron measurements as a proxy for environmental hydrogen content. Similarly to other ground‐based cosmic ray detectors (e.g., neutron monitors), CRNS detectors are affected by the solar cycle and space weather events.
Lasse Hertle, Fraser Baird, Ulrich Schmidt, Bernd Heber, Michael Walter, Nora Krebs, Paul Schattan, Pauli Väisänen, Peter Dietrich, Steffen Zacharias, Solveig Landmark, Daniel Rasche, Marco Kossatz, Gary Womack, Steve Hamann, Enrico Gazzola, Martin Schrön   +16 more
wiley   +1 more source

Exhumation History of the Sangre de Cristo Range, Colorado, From Mid‐ to Low‐Temperature Thermochronology: New Insights Into Laramide Contraction and Oligocene–Miocene Extension in the Northern Rio Grande Rift, USA

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The Sangre de Cristo Range in southern Colorado records a complex tectonic history that includes Late Cretaceous–Eocene Laramide contraction and Oligocene–Quaternary Rio Grande rift extension. We present new thermochronologic data (40Ar/39Ar, fission‐track, (U‐Th)/He) and thermal history models that provide insight into this polyphase history ...
John Singleton, Samantha Malavarca, Alexis K. Ault, Omar Ghamedi, M. Cole Sitar, Paul O’Sullivan, Martin Wong, Jonathan Saul Caine, James Metcalf, Dylan Frawley, Jeffrey M. Rahl   +10 more
wiley   +1 more source

Sm-Nd isotope study and dating on Honguleleng ophiolite in Xinjiang, China

Chinese Science Bulletin, 1999
A study of the Sm-Nd isotope composition of Honguleleng ophiolite in Xinjiang, China, isochron age ((626±25)Ma),eNd(t) =8.40,and its model age (T DM Nd ) in the range of 1 180–1 208 Ma, indicates that the ophiolite was formed in the late stage of the Upper Sinian.
Zhangdong Jin, Jianhua Huang, Fuchun Li
openaire   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, Volume 38, Issue 4, Page 266-277, August 2026.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Evaporation and Cold Pools Beneath Trade Cumulus Clouds

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 13, 16 July 2026.
Abstract The sources of air and water vapor in the tropical trade‐wind Atlantic subcloud boundary layer (SBL) are analyzed using in situ measurements of temperature, specific humidity, and stable water isotopologues (HDO and H218O) from shipboard observations in January‐February 2020.
Estefanía Quiñones Meléndez, Simon P. de Szoeke, Peter N. Blossey, David Noone, Mampi Sarkar, Adriana Bailey, Alton P. Daley   +6 more
wiley   +1 more source

Melting of old refractory mantle during subduction initiation of the western Pacific plate

Communications Earth & Environment
The source characteristics and melting mechanisms for forearc basalts formed during subduction initiation in the western Pacific plate remain unclear.
Hong-Yan Li, Chun Yang, Marguerite Godard, Jeffrey G. Ryan, Yi-Gang Xu   +4 more
doaj   +1 more source

AGE AND GEODYNAMIC SETTINGS FOR FORMATION OF CARBONATITE COMPLEXES AND ASSOCIATED RARE METAL DEPOSITS OF THE SOUTH URAL

Геодинамика и тектонофизика
The Ilmen-Vishnevogorsky and Buldym carbonatite complexes occurring in the Southern Urals represent linear deformed carbonatite complexes. Their origin, as well as the age and geodynamic conditions remain the subject of debate.
I. L. Nedosekova
doaj   +1 more source

Response: Sm-Nd Isotopic Data and Earth's Evolution [PDF]

Science, 1996
S A, Bowring, T, Housh
openaire   +2 more sources