Results 91 to 100 of about 110,450 (295)

δ26Mg, δ44Ca and 87Sr/86Sr isotope ratios constrain Mg and Ca input–output mass balances in a heavily acidified headwater catchment

Environmental Sciences Europe
A Central European catchment underlain by base-poor orthogneiss was studied using mass budgets and Mg–Ca–Sr isotope systematics. For 50 years, the catchment received large amounts of partly soluble dust from a nearby cluster of coal-burning power plants,
Martin Novak, Frantisek Veselovsky, Jakub Hruška, Chris Holmden, Alexandre V. Andronikov, Yulia V. Erban Kochergina, Vaclav Kachlik, Marketa Stepanova, Ondrej Pour, Ondrej Sebek, Eva Prechova, Arnost Komarek, Jan Curik, Frantisek Laufek, Irina E. Andronikova, Daniela Fottova, Pavla Holeckova, Tomas Paces   +17 more
doaj   +1 more source

Archean crust-mantle geochemical differentiation [PDF]

Isotope measurements on carbonatite complexes and komatiites can provide information on the geochemical character and geochemical evolution of the mantle, including the sub-continental mantle.
Tilton, G. R.
core   +1 more source

Isotope shifts of natural Sr+ measured by laser fluorescence in a sympathetically cooled Coulomb crystal [PDF]

, 2014
We measured by laser spectroscopy the isotope shifts between naturally-occurring even-isotopes of strontium ions for both the $5s\,\,^2S_{1/2}\to 5p\,\,^2P_{1/2}$ (violet) and the $4d\,\,^2D_{3/2}\to 5p\,\,^2P_{1/2}$ (infrared) dipole-allowed optical ...
Dubessy, Romain, Dubost, Brice, Guibal, Samuel, Guidoni, Luca, Likforman, Jean-Pierre, Szymanski, Benjamin   +5 more
core   +4 more sources

Origins of the Pangkaimen Au Deposit in the Northern Great Xing'an Range, China: Evidence From Geochronological, Geochemical, Fluid Inclusion, and H–O–S–Pb Isotope Data

Geological Journal, EarlyView.
The Pangkaimen Au–Ag deposits belong to the epithermal Au deposits, which are of great significance for guiding the research and development of this type of gold deposit. Metallogenic model diagram of Pangkaimen Au–Ag deposit. ABSTRACT The gold (Au) metallogenic belt in the northern Great Xing'an Range is characterised by the wide occurrence of the ...
Sheng Lu, Hongpeng Chen, Chenglu Li, Ye Wang, Tiesheng Li, Rigen Wu, Zengtao Li, Zhichao Song, Xiannan Zhu   +8 more
wiley   +1 more source

Geochemical, Geophysical and Morphological Results from the Chilean Southern Volcanic Zone: The Role of Fluids in Generating the Highest Magmatic Output [PDF]

, 2011
In the Collaborative Research Center (SFB574), which studies the role of volatiles and fluids in subduction zones, we have compiled a comprehensive geochemical data set from the Chilean Southern Volcanic Zone.
Dzierma, Yvonne, Garbe-Schönberg, Dieter, Hoernle, Kaj, Iyer, Karthik, Jacques, Guillaume, Kutterolf, Steffen, Lara, Luis, van den Bogaard, Paul, Völker, David, Wehrmann, Heidi   +9 more
core  

Geochronology of the Whittlesey sedimentary succession, eastern England: The ‘Pompeii’ of the British late Middle Pleistocene to Holocene record

Journal of Quaternary Science, EarlyView.
Abstract The sedimentary succession at Whittlesey preserves a unique British late Middle Pleistocene to Holocene record back to a time equivalent to at least marine oxygen isotope stage 8 (ca. 250 ka). This study builds on previously published sedimentology, geochronology and palaeoecology results to establish 20 sedimentary facies associations, with ...
H. E. Langford, M. D. Bateman, R. M. Briant, D. J. Horne   +3 more
wiley   +1 more source

Strontium Isotopic Variations of Neoproterozoic Seawater: Implications for Crustal Evolution [PDF]

, 1991
We report high precision Sr isotopic data on carbonates from the Neoproterozoic Shaler Group, Victoria Island, Northwest Territories, Canada. Lithostratigraphic correlations with the relatively well-dated Mackenzie Mountains Supergroup constrain Shaler ...
Asmerom, Yemane, Butterfield, Nicholas J., Jacobsen, Stein B., Knoll, Andrew, Swett, Keene   +4 more
core   +1 more source

Does Palsa Thaw in Northern Finland Contribute to Remobilisation of Metals Accumulated in Peat Into Surface Waters?

Land Degradation &Development, EarlyView.
ABSTRACT Permafrost is rapidly degrading in the sporadic zone, including palsa mires in Scandinavia. Peatlands in the area have likely accumulated heavy metals from atmospheric deposition of industrial contaminants in the wider region. As the palsa mire chemical composition is not well known, and in other permafrost regions the permafrost thaw may ...
Joanna Katarzyna Jóźwik, Krystyna Kozioł, Marcin Frankowski, Marta Jakubiak, Kamil Nowiński, Mariusz Jędrysek, Danuta Szumińska, Żaneta Polkowska   +7 more
wiley   +1 more source

Mantle heterogeneity during the formation of the North Atlantic Igneous Province: Constraints from trace element and Sr-Nd-Os-O isotope systematics of Baffin Island picrites [PDF]

, 2004
Sr-Nd-Os-O isotope and major and trace element data from ~62 Ma picrites from Baffin Island constrain the composition of mantle sources sampled at the inception of North Atlantic Igneous Province (NAIP) magmatism.
Eiler, J., Francis, D., Frei, R., Kent, A. J. R., Stolper, E. M., Woodhead, J.   +5 more
core   +1 more source

Mechanophoric 3‐Arm Star Functional Block Copolymer Based on Rhodamine Derivative

Macromolecular Materials and Engineering, EarlyView.
Mechanoresponsive rhodamine containing linear and star block and random copolymers were synthesized and characterized. All materials transitioned into a “switch‐on” state in the film form, but only the star block copolymer architecture exhibited a complete and precise peak shift upon stretching, providing new insights into the mechanochemical ...
Swadhin Chakraborty, Soumik Chatterjee, N. D. Pradeep Singh, Albena Lederer, Martin Geisler, Qiong Li, Mahmoud Al‐Hussein, Brigitte Voit, Nikhil K. Singha   +8 more
wiley   +1 more source