Results 21 to 30 of about 5,717 (242)
Radiogenic isotope records of Quaternary glaciations: Changes in the erosional source and weathering processes [PDF]
, 2004 Variations of global and regional silicate weathering rates and paleo-ocean circulation patterns are estimated by using radiogenic isotope records, but the effects of changes in provenance are generally ignored.
Sherlock, Sarah C. +7 more
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Stable and radiogenic isotopes as tracers for soil degradation [PDF]
, 2008 Soil erosion seriously threatens mountain slopes. Direct measurement of soil erosion in the field is difficult and needs long term recording. However, stable and radiogenic isotopes are potential tracers for soil erosion estimation and would enable a ...
Schaub, Monika
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Radiogenic isotope trace composition of the Labrador Sea [PDF]
, 2001 Geological reconstructions and general circulation models suggest that the onset of both Northern Hemisphere glaciation, 2.7 Myr ago, and convection of Labrador Sea Water (LSW) were caused by the closure of the Panama Gateway ~4.5 Myr ago.
von Blanckenburg, Friedhelm +3 more
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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 +3 more
doaj +1 more source
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 +6 more
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, 2015 Isotopes can be characterized to be stable, cosmogenic, radioactive, or radiogenic. Stable isotopes do not change their relative abundance in the environment as long as no isotopes are added or extracted from the system.
Eisenhauer, Anton, Anton Eisenhauer
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A boundary exchange influence on deglacial neodymium isotope records from the deep western Indian Ocean [PDF]
, 2012 24.02.14 KB.
Galy, A. +7 more
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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 +4 more
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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
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 +4 more
doaj +1 more source