Results 61 to 70 of about 10,085 (234)

Evaluation of the Rb/Sr ratio as an indicator of chemical weathering: a case study from five sedimentary sections in Northeast China

Boreas, EarlyView.
Chemical weathering plays a pivotal role in the Earth's surface material cycle and global climate regulation. It not only facilitates the reconstruction of palaeoclimate characteristics but also provides essential insights into Earth's evolutionary history.
Zhenyu Wei, Yuanyun Xie, Jie Meng, Lei Sun, Chunguo Kang, Yunping Chi, Peng Wu, Haijin Liu, Ruonan Liu, Ruitong Chang   +9 more
wiley   +1 more source

Adsorption of N-Tallow 1,3-Propanediamine–Dioleate Collector on Albite and Quartz Minerals, and Selective Flotation of Albite from Greek Stefania Feldspar Ore

, 2002
The adsorption behavior of tallow 1,3-propanediamine-dioleate (Duomeen TDO) collector on albite and quartz minerals is assessed through Hallimond flotation, zeta potential, and diffuse reflectance FTIR investigations, together with the species ...
Rao, K. Hanumantha,, Forssberg, Eric,, Vidyadhar, A.,   +2 more
core   +1 more source

Deformation-Induced and Reaction-Enhanced Permeability in Metabasic Gneisses, Iona, Scotland: Controls and Scales of Retrograde Fluid Movement

Geofluids, 2021
The spatial distribution of greenschist-facies retrograde reaction products in metabasic gneisses from Iona, western Scotland, has been investigated. The retrograde products may be broadly accounted for by a single reaction, but their different spatial ...
Tim J. Dempster, Allan D. Hollinsworth, Euan McIntosh, Shannon Edgar, John W. Faithfull, Daniel Koehn   +5 more
doaj   +1 more source

Afghanite: A New Silicate‐Matrix Reference Material for In Situ Halogen and Sulfur Microanalysis

Geostandards and Geoanalytical Research, EarlyView.
Key Points A new silicate matrix reference material for in situ chlorine and sulfur determination. Homogeneous across all measured elements. No matrix effects for Cl when calibrating silicate matrices, in contrast to scapolite, which causes systematic Cl overestimation of up to 13%.
Sebastian Stumpf, Thomas Pettke, Johannes Hammerli, Michael A.W. Marks, Andreas Audétat, Jaime D. Barnes, Julia Dietrich, Renée J. Tamblyn   +7 more
wiley   +1 more source

Lithium Kolmozero deposit of rare metal pegmatites: New data on rare element composition (Kola Peninsula)

Литосфера, 2018
The article is devoted to studies the rare element composition of albite-spodumene pegmatites of the lithium with associated Be, Nb, Ta Kolmozero deposit.
Lyudmila N. Morozova
doaj   +1 more source

Quantification of Sulfur Speciation in Apatites: Comparison of the XAS, XPS and EPMA Techniques

Geostandards and Geoanalytical Research, EarlyView.
Key Points Sulfur speciation in apatites has been determined by S K‐edge X‐ray absorption near‐edge structure (XANES) spectroscopy, S 2p X‐ray photoelectron spectroscopy (XPS) and electron probe microanalysis (EPMA). XANES provides the most sensitive and accurate quantification of sulfur speciation.
Yuzhou Feng, Yuanming Pan, Leo Ka Long Cheung, Reza Deevsalar, Jason Maley, Huayong Chen, Haoran Dou, Mohsen Shakouri, Qunfeng Xiao   +8 more
wiley   +1 more source

A neural network‐based Monte Carlo X‐ray (MC X‐ray) approach for quantitative analysis of homogeneous multi‐element bulk samples at 20 kV

Journal of Microscopy, EarlyView.
Abstract Accurate quantitative analysis of homogeneous bulk samples is critical in materials science and mineral industry applications, yet conventional standards‐based Energy Dispersive Spectroscopy (EDS) quantitative analysis remains reliable and widely used.
Dawei Gao, Nicolas Brodusch, Nicolas Piché, Raynald Gauvin   +3 more
wiley   +1 more source

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

(Table 6) Representative analyes of phengite, chlorite, albite, and sphene of ODP Hole 125-778A

, 1992
Calculation base on O = 22 (phengite), O = 28 (chlorite), O = 8 (albite), Si = 4 (sphene).
Ogawa, Yujiro, Shozui, Masaya, Ishii, Teruaki, Masaya Shozui (6966365), Hirokazu Maekawa (6966362), Saboda, Kristine L, Teruaki Ishii (6963374), Yujiro Ogawa (6961280), Maekawa, Hirokazu, Kristine L Saboda (6966368)   +9 more
core   +1 more source

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

Meteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartèse, M. Gounelle, D. AuYang, C. Sonzogni, M. Hutson, A. Irving, C. Agee, T. Shisseh, A. Love, V. Vidal, D. Borschneck, S. A. Eckley, A. Morbidelli   +17 more
wiley   +1 more source