Results 51 to 60 of about 16,800 (234)

Thorium determination in seawater by inductively coupled plasma mass spectrometry: Method development and oceanographic applications

Talanta Open
Thorium isotopes in the ocean (including radiogenic isotopes and terrigenous-derived 232Th) serve as key tracers for studying land-derived material transport. While high-sensitivity and high-resolution inductively coupled plasma mass spectrometry (ICP-MS)
Yingjie Zou, Peng Wang, Lei Xu, Hong Ren, Yiyao Cao   +4 more
doaj   +1 more source

Constraining recent lead pollution sources in the North Pacific using ice core stable lead isotopes [PDF]

, 2012
Trends and sources of lead (Pb) aerosol pollution in the North Pacific rim of North America from 1850 to 2001 are investigated using a high-resolution (subannual to annual) ice core record recovered from Eclipse Icefield (3017 masl; St.
Gross, B H, Handley, M J, Kreutz, K, McConnell, J R, Osterberg, Erich, Wake, Cameron P, Yalcin, Kaplan   +6 more
core   +2 more sources

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

Geostandards and Geoanalytical Research, EarlyView.
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

Radiogenic and stable isotope measurement using a MC-ICP-MS

Journal of Analytical Science and Technology, 2011
In this study, we presented newly developed analytical methods for radioactive, radiogenic, and stable isotopes using a multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS), where the elemental purification, and precision and accuracy
Min Seok Choi, Jong-Sik Ryu, Sin-Woo Lee, Chang-Sik Cheong, Hyung Seon Shin, Kwang-Sik Lee   +5 more
doaj  

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

Isotopes in hydrology and hydrogeology [PDF]

, 2019
The structure, status, and processes of the groundwater system, which can only be acquired through scientific research efforts, are critical aspects of water resource management. Isotope hydrology and hydrogeology is a genuinely interdisciplinary science.
Barbieri, Maurizio
core   +1 more source

Moon's volcanic history revealed in glassy spherules from Apollo 17 soil 76501

Meteoritics &Planetary Science, EarlyView.
Abstract Rapidly quenched droplets of pyroclastically erupted lava are common in lunar regolith at landing sites proximal to the maria. Here, we document the U‐Pb chronologies, major element, and trace element compositions of picritic glassy particles from Apollo 17 regolith sample 76501. These particles are dominated by high‐Ti compositions similar to
Alexander A. Nemchin, Marc D. Norman, Martin J. Whitehouse, Evgenia Salin, Nicholas E. Timms, Tao Long, Xiaochao Che, Renaud Merle, Fred Jourdan, Tao Luo   +9 more
wiley   +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

Extremely high He isotope ratios in MORB-source mantle from the proto-Iceland plume [PDF]

, 2003
The high ³He/⁴He ratio of volcanic rocks thought to be derived from mantle plumes is taken as evidence for the existence of a mantle reservoir that has remained largely undegassed since the Earth's accretion.
AD Saunders, AK Pedersen, B Marty, B Marty, BB Hanan, BS Hardarson, D Anderson, D Francis, D Porcelli, D Porcelli, DJ DePaolo, DM McKenzie, DR Hilton, DR Hilton, DW Graham, EH Hauri, ET Dixon, Finlay M. Stuart, FM Stuart, FM Stuart, I Robillard, J. Godfrey Fitton, JG Fitton, JG Fitton, JM Eiler, M Honda, MD Kurz, MD Kurz, MJ Whitehouse, RD van der Hilst, Robert M. Ellam, Solveigh Lass-Evans, T Prestvik, V Olive   +33 more
core   +2 more sources

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, EarlyView.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source