Results 21 to 30 of about 19,693 (231)

Tropical Sand Cays as Natural Paleocyclone Archives

Geophysical Research Letters, 2019
Sand cays are valuable paleo‐archives that can significantly increase our understanding of Holocene tropical cyclone variability. Here we conducted detailed sedimentological and chronological analyses from a 195‐cm‐depth pit excavated on Guangjin Island (
Tianran Chen, George Roff, Yuexing Feng, Jianxin Zhao   +3 more
doaj   +1 more source

Laser ablation in situ U-Pb dating and its application to diagenesis-porosity evolution of carbonate reservoirs

Petroleum Exploration and Development, 2019
Through the development and calibration of a reference material which is 209.8 Ma old using a newly-developed Laser Ablation (LA) Multi-Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICP-MS) technique, we successfully overcome the difficulty ...
Anjiang SHEN, Anping HU, Ting CHENG, Feng LIANG, Wenqing PAN, Yuexing FENG, Jianxin ZHAO   +6 more
doaj   +1 more source

Characterization of Nd Radiogenic Isotope Signatures in Sediments From the Southwestern Atlantic Margin

Frontiers in Earth Science, 2018
Based on radiogenic isotope systems of neodymium [Epsilon Neodymium-εNd(0), 143Nd/144Nd, 147Sm/144Nd, and Sm-Nd Depleted Mantle Model ages-TDM] from current and previous data of continental rocks and associated sediments, this work provides the ...
Simone S. Mantovanelli, Colombo C. G. Tassinari, Michel M. De Mahiques, Michel M. De Mahiques, Luigi Jovane, Everton Bongiolo   +5 more
doaj   +1 more source

Radiogenic Lead with Dominant Content of 208Pb: New Coolant and Neutron Moderator for Innovative Nuclear Facilities

Science and Technology of Nuclear Installations, 2011
As a rule materials of small atomic weight (light and heavy water, graphite, and so on) are used as neutron moderators and reflectors. A new very heavy atomic weight moderator is proposed—radiogenic lead consisting mainly of isotope 208Pb.
A. N. Shmelev, G. G. Kulikov, V. A. Apse, E. G. Kulikov, V. V. Artisyuk   +4 more
doaj   +1 more source

Petrology and geochemistry of a U and Th enriched nephelinite from Mt. Nyiragongo, Zaire: Its bearing on ancient mantle metasomatism [PDF]

Bulletin of the Geological Society of Finland, 1985
Unusual large Pb isotope variations found by Vollmer and Norry (1983 a) in nephelinites from Nyiragongo and related volcanoes date a 500 Myr old U(Th)/Pb fractionation.
R. Vollmer, P.H. Nixon, E. Condliffe
doaj   +1 more source

Asian dust input in the western Philippine Sea: Evidence from radiogenic Sr and Nd isotopes [PDF]

, 2013
The radiogenic strontium (Sr) and neodymium (Nd) isotope compositions of the detrital fraction of surface and subsurface sediments have been determined to trace sediment provenance and contributions from Asian dust off the east coast of Luzon Islands in ...
An, Anchun Li, Asahara, Asahara, Asahara, Bayon, Bentahila, Biscaye, Blum, Boggs, Chen, Chen, Chen, Chen, Chen, Chen, Chuang, Cohen, Dadson, Dasch, Defant, Deschamps, Dou, Duce, Feng, Fuqing Jiang, Goldstein, Grousset, Grousset, Gutjahr, Han, Han, Horng, Horwitz, Hsu, Huh, Hung, Jacobsen, Jones, Jones, Kohfeld, Ku, Lan, Lan, Lea, Li, Li, Liu, Liu, Liu, Liu, Lugmair, Mahoney, Mahoney, Martin, Martin Frank, McLennan, Meng, Nakai, Page, Parra, Pettke, Qin, Rea, Ren, Revel, Ridgwell, Shi, Shi, Smith, Steiger, Sun, Tanaka, Tegen, The Shipboard Scientific Party, Tian-Yu Chen, Tiegang Li, Toole, Tütken, Vidal, Walter, Weber, Wei, Weldeab, Woodhead, Yang, Yokoo, Zhaokai Xu   +87 more
core   +1 more source

Novel nannofossils extraction methods from paintings, coupled with GC–MS for provenance determination and binder analysis

Heritage Science, 2022
The use of calcareous nannofossils for provenance analysis is a new-old topic for cultural heritage. Several studies have already mentioned it for ceramic, but less for paintings.
Victory Armida Janine Jaques, Jakub Trubač, Jiří Rathouský, Tomáš Cajthaml, Katarína Holcová   +4 more
doaj   +1 more source

Identifying the origins of local atmospheric deposition in the steel industry basin of Luxembourg using the chemical and isotopic composition of the lichen Xanthoria parietina [PDF]

, 2008
Trace metal atmospheric contamination was assessed in one of the oldest European industrial sites of steel production situated in the southern part of the Grand-Duchy of Luxembourg.
Geagea, Majdi Lahd, Hissler, Christophe, Hoffmann, Lucien, Krein, Andreas, Perrone, Thierry, Probst, Jean-Luc, Stille, Peter   +6 more
core   +3 more sources

Radiogenic p-isotopes from type Ia supernova, nuclear physics uncertainties, and galactic chemical evolution compared with values in primitive meteorites [PDF]

, 2014
The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae (SNe Ia) with different metallicities.
Arlandini, Bennett, Bisterzo, Borg, C. Travaglio, Dauphas, Dauphas, Davis, Dillmann, Dillmann, F. K. Röpke, Friedman, Gallino, Hayakawa, Howard, Jacobsen, Kiss, Kusakabe, Lodders, Marganiec, Meissner, Meyer, N. Dauphas, Qian, R. Gallino, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rauscher, Rayet, Schönbächler, Somorjai, T. Rauscher, Travaglio, Travaglio, Travaglio, Travaglio, Travaglio, W. Hillebrandt   +42 more
core   +2 more sources

Radiogenic power and geoneutrino luminosity of the Earth and other terrestrial bodies through time

, 2020
We report the Earth's rate of radiogenic heat production and (anti)neutrino luminosity from geologically relevant short-lived radionuclides (SLR) and long-lived radionuclides (LLR) using decay constants from the geological community, updated nuclear ...
Enomoto S., Izidoro A., Kruijer T. S., McDonough W. F., McDonough W. F., Sato J., Wipperfurth S. A.   +6 more
core   +1 more source