Results 91 to 100 of about 19,693 (231)

Along- and Across-Arc Variations in the Southern Volcanic Zone, Chile [PDF]

, 2010
Within Collaborative Research Center (SFB574), we are studying the changes in the chemistry of olivinebearing volcanic rocks along the volcanic front of the Southern Volcanic Zone (SVZ) in Chile and in the rear and backarc in Argentina.
Garbe-Schönberg, C.-Dieter, Hauff, Folkmar, Hoernle, Kaj, Jacques, Guillaume, Lara, Luis, van den Bogaard, Paul, Wehrmann, Heidi   +6 more
core  

Production of 21 Ne in depth-profiled olivine from a 54 Ma basalt sequence, Eastern Highlands (37° S), Australia [PDF]

, 2018
In this study we investigate the cosmogenic neon component in olivine samples from a vertical profile in order to quantify muogenic 21Ne production in this mineral.
Barrows, Timothy T., Chivas, Allan R., Fabel, Derek, Fifield, L. Keith, Honda, Masahiko, Matchan, Erin L., Phillips, David   +6 more
core   +3 more sources

Differing Controls on the Cycling of Neodymium in the Atlantic and the Pacific

Geophysical Research Letters
Neodymium (Nd) isotopes ratios are regarded as a key proxy for past ocean circulation despite unsettled debate on marine Nd cycle controls, which opposes a “top‐down” hypothesis (surface sources dominate) and a “bottom‐up” hypothesis (sedimentary sources
Paige M. Wise, Benoît Pasquier, Seth G. John, Sophia K. V. Hines   +3 more
doaj   +1 more source

Earth-atmosphere evolution based on the new determination of Devonian atmosphere Ar isotopic composition [PDF]

The isotopic composition of the noble gases, in particular Ar, in samples of ancient atmosphere trapped in rocks and minerals provides the strongest constraints on the timing and rate of Earth atmosphere formation by degassing of the Earth's interior. We
Gandanger, Pierre, Mark, Darren F., McConville, Paul, Stuart, Finlay M.   +3 more
core   +1 more source

Radiogenic backgrounds in the NEXT double beta decay experiment [PDF]

, 2019
Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector.
Adams, C, Arazi, L, Arnquist, IJ, Azevedo, CDR, Bailey, K, Ballester, F, Benlloch-Rodríguez, JM, Borges, FIGM, Byrnes, N, Carrión, JV, Cebrían, S, Church, E, Conde, CAN, Contreras, T, Cárcel, S, Diesburg, M, dos Santos, JMF, Díaz, G, Díaz, J, Escada, J, Esteve, R, Felkai, R, Fernandes, AFM, Fernandes, LMP, Ferrario, P, Ferreira, AL, Freitas, EDC, Generowicz, J, Ghosh, S, Goldschmidt, A, Gonźalez-Díaz, D, Guenette, R, Gutiérrez, RM, Gómez-Cadenas, JJ, Haefner, J, Hafidi, K, Hauptman, J, Henriques, CAO, Hernando Morata, JA, Herrero, P, Herrero, V, Ifergan, Y, Johnston, S, Jones, BJP, Kekic, M, Labarga, L, Laing, A, Lebrun, P, Losada, M, López-March, N, Mano, RDP, Martín-Albo, J, Martínez, A, Martínez-Lema, G, McDonald, AD, Monrabal, F, Monteiro, CMB, Mora, FJ, Muñoz Vidal, J, Novella, P, Nygren, DR, Palmeiro, B, Para, A, Psihas, F, Pérez, J, Querol, M, Renner, J, Repond, J, Riordan, S, Ripoll, L, Rodríguez García, Y, Rodríguez, J, Rogers, L, Romeo, B, Romo-Luque, C, Santos, FP, Simón, A, Sofka, C, Sorel, M, Stiegler, T, Toledo, JF, Torrent, J, Usón, A, Veloso, JFCA, Webb, R, Weiss-Babai, R, White, JT, Woodruff, K, Yahlali, N, Álvarez, V   +89 more
core   +1 more source

DATAMESOP: DATAset on Stable Isotope Measurement (Strontium, Oxygen and Carbon) of Archaeological and Non-Archaeological Materials from South-West Asia for MESOPotamia

Journal of Open Archaeology Data
DATAMESOP is one of the first comprehensive isotopic datasets aimed at supporting bioarchaeological studies in ancient Mesopotamia. The dataset compiles radiogenic strontium and stable carbon, and oxygen isotope measurements from both archaeological ...
Matteo Giaccari, Licia Romano, Franco D’Agostino, Mary Anne Tafuri   +3 more
doaj   +1 more source

Recent Development in Radiogenic Isotope Geology

Journal of Geography (Chigaku Zasshi), 1964
Several topics of the research in radiogenic isotope geology are briefly reviewed. This short review consists of four parts; (i) recent development in the instrumentation, (ii) in the methodology, (iii) topics on the mantle-crustal evolution on the basis of Pb, Sr isotope growth and (iv) geochronology of ocean floors.
openaire   +2 more sources

A perspective from extinct radionuclides on a Young Stellar Object: The Sun and its accretion disk

, 2011
Meteorites, which are remnants of solar system formation, provide a direct glimpse into the dynamics and evolution of a young stellar object (YSO), namely our Sun.
Christophe Michel-Lévy M, Das JP, Dauphas N, Grimm RE, Hollenbach DJ, Hudson GB, Hutcheon ID, Jacobsen B, Kita NT, Kleine T, MacPherson GJ, Marc Chaussidon, Mostéfaoui S, Nagashima K, Nagashima K, Nicolas Dauphas, Safronov VS, Tang H, Wetherill GW., Wetherill GW., Yin Q-Z   +20 more
core   +1 more source

Seismic and isotopic evidence for depth-dependent mantle sources of intraplate basalts from Eastern China

Communications Earth & Environment
The origin of intraplate basalts remains controversial, despite numerous isotope and seismic studies. Here we employ thermodynamic modeling with MAGEMin to integrate the Sr-Nd-Hf isotopes of basaltic volcanics with the seismic velocities of their mantle ...
Zongpeng Yang, Tong Hou, Roman Botcharnikov, Evangelos Moulas, Stefan Weyer, Meng Wang, Stephan Buhre, Zhaochong Zhang   +7 more
doaj   +1 more source

Characterization of Modern and Fossil Mineral Dust Transported to High Altitude in the Western Alps: Saharan Sources and Transport Patterns

Advances in Meteorology, 2012
Mineral dust aerosols recently collected at the high-altitude Jungfraujoch research station (N, E; 3580 m a.s.l.) were compared to mineral dust deposited at the Colle Gnifetti glacier (N, E; 4455 m a.s.l.) over the last millennium.
Florian Thevenon, Massimo Chiaradia, Thierry Adatte, Christoph Hueglin, John Poté   +4 more
doaj   +1 more source