Results 51 to 60 of about 16,929 (223)

Sr-Nd-Pb-Hf isotope results from ODP Leg 187: Evidence for mantle dynamics of the Australian-Antarctic Discordance and origin of the Indian MORB source [PDF]

, 2002
New high precision PIMMS Hf and Pb isotope data for 14–28 Ma basalts recovered during ODP Leg 187 are compared with zero-age dredge samples from the Australian-Antarctic Discordance (AAD).
Alvarez, Anderson, Arculus, Barling, Ben Othman, Charles Langmuir, Chauvel, Christie, Christie, David M. Christie, Donnelly, Dosso, Fitton, Fitzsimons, Forsyth, Frey, Frey, Galer, Graham, Gurnis, Hamelin, Hanan, Hart, Hemming, Hochstaedter, J. Godfrey Fitton, Julian A. Pearce, Kelly, Kempton, Kempton, Kent, Klein, Klein, Kuo, Lanyon, Lanyon, Mahoney, Mahoney, Mahoney, Mahoney, Marks, Marks, Marsh, Michard, Nowell, Palmer, Pamela D. Kempton, Patchett, Patchett, Pearce, Pearce, Pearce, Pearce, Peate, Plank, Pyle, Pyle, Pyle, Rehkämper, Royer, Russo, Salters, Salters, Sempéré, Smith, Storey, Tiffany L. Barry, Todt, Unrug, Vervoort, Vlastelic, Vogt, Weis, Weissel, Weissel, West, Yang, Zhang   +77 more
core   +2 more sources

Radiogenic Strontium‐ and Uranium‐Isotope Tracers of Water‐Rock Interactions and Hydrothermal Flow in the Upper Geyser Basin, Yellowstone Plateau Volcanic Field, USA

Geochemistry, Geophysics, Geosystems
Natural radiogenic isotopes (primarily 87Sr/86Sr) from hot springs in the Upper Geyser Basin of the Yellowstone Plateau volcanic field and associated rocks were used to evaluate groundwater flow patterns, water‐rock reactions, and the extent of mixing ...
James B. Paces, Shaul Hurwitz, Lauren N. Harrison, Jacob B. Lowenstern, R. Blaine McCleskey   +4 more
doaj   +1 more source

The Dual Origin of the Terrestrial Atmosphere

, 2003
The origin of the terrestrial atmosphere is one of the most puzzling enigmas in the planetary sciences. It is suggested here that two sources contributed to its formation, fractionated nebular gases and accreted cometary volatiles.
Abe, Anders, Ballentine, Balsiger, Bar-Nun, Bar-Nun, Benz, Bockelée-Morvan, Burnard, Busemann, Caffee, Chen, Chyba, Chyba, Dauphas, Dauphas, Dauphas, Dauphas, Dauphas, Dauphas, Delsemme, Delsemme, Eberhardt, Holland, Honda, Honda, Hunten, Hunten, Ihaka, Iro, Jagoutz, Kerridge, Kimura, Kleine, Kunz, Laufer, Marty, Marty, Marty, Maréchal, Mathew, Mathew, Matsui, Matsumoto, Mazor, Meier, Meisel, Meisel, Morbidelli, Moreira, Moreira, Nicolas Dauphas, Notesco, Notesco, Owen, Owen, Owen, Owen, Ozima, Ozima, Ozima, Pepin, Pepin, Pepin, Pepin, Pepin, Pepin, Podosek, Porcelli, Porcelli, Press, Sagan, Sarda, Sasaki, Schoenberg, Shoemaker, Swindle, Swindle, Tolstikhin, Trieloff, Walker, Wieler, Wieler, Yamamoto, Yin, Yokochi, Zahnle, Zahnle, Zahnle, Zahnle, Zahnle, Zhang   +91 more
core   +1 more source

Current status and potentials of enhanced geothermal system in the Eastern Pontide Orogenic Belt, Turkey

International Journal of Renewable Energy Development
The radioactive decay of isotopes is one of the most important sources of heat in the Earth's interior. The main radiogenic elements in the crust are U, Th, and K in granitoids.
Mehmet Furkan Şener
doaj   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 369-389, June 2026.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro, Erica Martini Tonetto, Elson P. Oliveira, Mauricio Ibañez‐Mejia, Cristina Talavera, Neal J. McNaughton, Jacinta Enzweiler, Michael Wiedenbeck   +7 more
wiley   +1 more source

Contrasting Mechanisms Controlling Pb Isotopes of Dust in Inland and Marine Archives

Geophysical Research Letters
Lead (Pb) isotopes are powerful tools for tracing dust provenance and reconstructing paleoclimate. However, variations in Pb isotopic compositions among different grain‐size fractions in sediments complicate their use.
Ruxi Dou, Jianjun Zou, Xuefa Shi, Zhi Dong, Yonghua Wu, Aimei Zhu, Xuguang Feng, Xinqing Zou, Sergey Gorbarenko, Yuriy Vasilenko, Aleksandr Bosin   +10 more
doaj   +1 more source

A Common Reference Material for Mass‐Dependent Sn Isotope Compositions: An Inter‐Laboratory Calibration Approach

Geostandards and Geoanalytical Research, Volume 50, Issue 2, Page 341-367, June 2026.
Key Points We recommend using the notation δ122/118SnNIST SRM 3161a for mass‐dependent Sn isotope data. We derived conversion factors relative to NIST SRM 3161a for Puri Sn CEZA (0.132 ± 0.011‰), Sn Lyon (0.229 ± 0.016‰), Sn IPGP (0.162 ± 0.018‰). Tin isotope compositions are presented for SPEX CertiPrep Sn and nine USGS reference materials.
Aurélia C.E. Meister, Manuela A. Fehr, Quentin Amet, Gerhard Brügmann, Caroline Fitoussi, Matthias Friebel, Weiqiang Li, Frederic Moynier, Jia‐Xin She, Xueying Wang, Maria Schönbächler   +10 more
wiley   +1 more source

Atmospheric dust is a global nutrient source for plants via foliar uptake

New Phytologist, Volume 250, Issue 5, Page 2867-2883, June 2026.
Summary Atmospheric mineral dust is a critical nutrient supplier to marine ecosystems, but its role in terrestrial plant nutrition remains underexplored due to the assumption that nutrients are acquired solely from soils via roots. Here, we demonstrate that plants directly acquire nutrients from dust through leaves, revealing an unrecognized ...
Anton Lokshin, Daniel Palchan, Marcelo Sternberg, Tom Goren, Mahdi (André) Nakhavali, Avner Gross   +5 more
wiley   +1 more source

A comprehensive study of noble gases and nitrogen in Hypatia, a diamond-rich pebble from SW Egypt [PDF]

, 2015
This is a follow-up study of a work by Kramers et al. (2013) on an unusual diamond-rich rock found in the SW side of the Libyan Desert Glass strewn field. This pebble, called Hypatia, is composed of almost pure carbon.
Andreoli, Marco A. G., Avice, Guillaume, Cartigny, Pierre, Kramers, Jan D., Langenhorst, Falko, Maden, Colin, Marty, Bernard, Meier, Matthias M. M., Wieler, Rainer, Zimmermann, Laurent   +9 more
core   +4 more sources

Uranium, vanadium, and chromium in fish scales: A redox‐unrelated accumulation pathway in continental margin sediments

Limnology and Oceanography, Volume 71, Issue 5, May 2026.
Abstract Enrichment patterns of the redox‐ and bio‐sensitive trace elements U, V, Cr, and Ni in margin sediments are essential for environmental reconstructions. However, their sedimentary accumulation pathways are not fully understood. While the accumulation of toxic trace elements like Cd, Hg, Pb, and Zn has been relatively well studied in fish ...
Frederik Gäng, Lena Göller, Volker Brüchert, Katharina Pahnke, Philipp Böning   +4 more
wiley   +1 more source