Results 111 to 120 of about 33,494 (250)

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

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

Olivine versus peridotite during serpentinization: Gas formation

, 2015
The dependence of starting materials and their initial grain sizes on the formation of gases (H-2, CH4, C2H6 and C3H8) during serpentinization was investigated by conducting hydrothermal experiments at 311A degrees C and 3 kbar on olivine and peridotite ...
Sun WeiDong, Huang RuiFang, Ding Xing, Liu JinZhong, Peng ShaoBang   +4 more
core   +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

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

Discovery of Olivine in the Nili Fossae Region of Mars

, 2003
We have detected a 30,000-square-kilometer area rich in olivine in the Nili Fossae region of Mars. Nili Fossae has been interpreted as a complex of grabens and fractures related to the formation of the Isidis impact basin.
Hoefen, T. M.
core   +1 more source

Thermal history of an amoeboid olivine aggregate in the early solar nebula

Meteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura, N. Imae, M. Komatsu, A. Yamaguchi   +3 more
wiley   +1 more source

Structural Evolution of Olivine during Mechanochemically Assisted Mineral Carbonation under CO₂ Flow

Inorganics
The mechanism of the mechanically assisted mineral carbonation of commercial olivine under the flow of a carbon dioxide (CO2)/nitrogen (N2) mixture has been elucidated by ex situ powder X-ray diffraction and Fourier-transform infrared spectroscopy.
Costantino Cau, Alessandro Taras, Gabriele Masia, Laura Caggiu, Stefano Enzo, Sebastiano Garroni, Fabrizio Murgia, Gabriele Mulas   +7 more
doaj   +1 more source

Olivine-phyric basalt in the Mesoproterozoic Gawler silicic large igneous province, South Australia: Examples at the Olympic Dam Iron Oxide Cu-U-Au-Ag deposit and other localities

, 2016
The felsic-dominant Gawler Range Volcanics and cogenetic Hiltaba Suite granitoids constitute the ca. 1590 Ma Gawler silicic large igneous province in the Gawler Craton, South Australia.
K. Cross (17545886), N. Direen (23305747), R. Maas (1343034), S. Meffre (556594), I. Chambefort (8875256), O. Apukhtina (23305750), V. Kamenetsky (8875925), K. Ehrig (3595805), J. McPhie (5517368), Q. Huang (722555), Andrea Agangi (23305744), M. Kamenetsky (23305741)   +11 more
core  

Hawaiian beaches as natural analogues for enhanced silicate weathering of olivine

Environmental Research Letters
Silicate weathering induces atmospheric CO _2 sequestration through alkalinity release, which is Earth’s prime mechanism for regulating the climate. Marine enhanced rock weathering (mERW) seeks to accelerate this process by distributing fast-weathering ...
Matthias Kreuzburg, Astrid Hylén, Devon B Cole, Stephen J Romaniello, Chandra W Winardhi, Veerle Cnudde, Daniel A Frick, Josephine Barnett, Kirsten P Nicolaysen, Filip J R Meysman   +9 more
doaj   +1 more source