Results 31 to 40 of about 16,800 (234)

Tracing crustal contamination of the Cenozoic basalts with OIB-affinity in northern marginal region of North China Craton: An Os perspective

China Geology, 2021
The Cenozoic basalts with OIB-affinity in northern marginal region of the North China Craton are thought to experience minor even no crustal contamination during the magma evolution.
Zhuang Li, Bin Chen
doaj   +1 more source

Geodynamic and Isotopic Constraints on the Genesis of Kimberlites, Lamproites and Related Magmas From the Finnish Segment of the Karelian Craton

Geochemistry, Geophysics, Geosystems, 2022
Despite the scientific and economic significance of kimberlites and related magmas, their origin is unclear. Here, we address this issue using whole‐rock and perovskite‐derived Sr‐Nd‐Hf isotopes for the three occurrences of kimberlite, lamproites and ...
Hayden Dalton, Andrea Giuliani, Janet Hergt, David Phillips, Hugh O’Brien, Maxim D. Ballmer, Roland Maas, Jon Woodhead   +7 more
doaj   +1 more source

Input Comparison of Radiogenic Neutron Estimates for Ultra-low Background Experiments

, 2017
Ultra-low-background experiments address some of the most important open questions in particle physics, cosmology and astrophysics: the nature of dark matter, whether the neutrino is its own antiparticle, and does the proton decay.
Cooley, J., Palladino, K. J., Qiu, H., Scorza, S., Selvi, M., Zhang, C.   +5 more
core   +1 more source

New attempts to understand nanodiamond stardust [PDF]

, 2011
We report on a concerted effort aimed at understanding the origin and history of the pre-solar nanodiamonds in meteorites including the astrophysical sources of the observed isotopic abundance signatures.
A. Besmehn, A. Wallner, Arndt, Arndt, Besmehn, Braatz, Dillmann, Heck, Hohenberg, Hoppe, Huss, Huss, K. Farouqi, K. Melber, K.-L. Kratz, Kutschera, Lewis, Lodders, Marhas, Nichols, O. Hallmann, Ott, Ott, Ott, P. Hoppe, Pearson, Priller, Schönbächler, Steier, U. Ott, Wallner, Wallner, Zinner   +32 more
core   +3 more sources

Cosmogenic and Radiogenic Isotopes [PDF]

Nature, 1964
Radioactive Dating (Proceedings of the Symposium held by the International Atomic Energy Agency in co-operation with the Joint Commission on Applied Radioactivity (ICSU) in Athens, 19–23 November 1962.) (Proceedings Series.) Pp viii + 440. (Vienna : International Atomic Energy Agency; London: H.M.
openaire   +1 more source

Spatial heterogeneity in the radiogenic activity of the lunar interior: Inferences from CHACE and LLRI on Chandrayaan-1

, 2012
In the past, clues on the potential radiogenic activity of the lunar interior have been obtained from the isotopic composition of noble gases like Argon.
Ahmed, S. M., Bhardwaj, Anil, Das, Tirtha Pratim, Kamalakar, J. A., Sridharan, R., Supriya, Gogulapati   +5 more
core   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

South Asian monsoon history over the past 60 kyr recorded by radiogenic isotopes and clay mineral assemblages in the Andaman Sea [PDF]

, 2015
The Late Quaternary variability of the South Asian (or Indian) monsoon has been linked with glacial‐interglacial and millennial scale climatic changes but past rainfall intensity in the river catchments draining into the Andaman Sea remains poorly ...
Ali, Sajid, Frank, Martin, Gebregiorgis, Daniel, Giosan, Liviu, Hathorne, Ed C., Johnson, Joel E., Kutterolf, Steffen, Stattegger, Karl, Stumpf, Roland   +8 more
core   +1 more source

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

Integrating Sr isotopes, microchemistry, and genetics to reconstruct Salmonidae species and life history

Archaeometry, EarlyView.
Abstract Recent approaches to fisheries research emphasize the importance of the coproduction of knowledge in building resilient and culturally mindful fisheries management frameworks. Despite widespread recognition of the need for Indigenous knowledge and historical reference points as baseline data, archaeological data are rarely included in ...
Ross Salerno, Remi Murdoch, Joanna Elmore, Taylor Wilcox, Jens Hegg, Catherine S. Austin, Michael LeMoine, Jade Luckhurst, Alexandra K. Fraik, Molly Carney   +9 more
wiley   +1 more source