Results 61 to 70 of about 6,298 (230)

Synthesis of Tungsten Oxide Nanoparticles using a Hydrothermal Method at Ambient Pressure [PDF]

, 2014
Tungstite (WO3.H2O) nanoparticles were synthesized using a simple and inexpensive low temperature and low pressure hydrothermal method by adding hydrochloric acid to diluted sodium tungstate solutions (Na2WO4.2H2O) at temperatures below 5oC. A heat treatment at temperatures at or above 300oC resulted in a phase transformation to monoclinic WO3, while ...
arxiv   +1 more source

A pXRF‐based geochemical dataset of typical boreholes in Xuancheng Qiaomaishan copper–sulphur deposit

Geoscience Data Journal, Volume 11, Issue 4, Page 538-549, October 2024.
In this study, we use pXRF to analyze major and trace elements in Qiaomaishan copper‐sulphur ore cores. The finding shows that the abundance changes of Fe, Cu, S, and W are closely related to the distribution of ore bodies in the borehole bar chart. Abstract Drilled cores provide first‐hand data for deposit research.
Mingming Zhang, Junqin Jiao, Guoyu Zhou, Siyang Li, Chengbao Wang, Jinxiao Long, Can Ge, Liang Wang, Hongdong Fang   +8 more
wiley   +1 more source

Aminated TiO2 nanotube as a Photoelectrochemical Water Splitting photoanode [PDF]

, 2016
The present work reports on the enhancement of TiO2 nanotubes photoelectrochemical water splitting rate by decorating the nanostructure with an amine layer in a hydrothermal process using diethylenetriamine (DETA). The aminate coated TiO2 tubes show a stable improvement of the photoresponse in both UV and visible light spectrum and under hydrothermal ...
arxiv   +1 more source

Neoproterozoic hydrothermal activity in the West Australian Craton related to Rodinia assembly or breakup? [PDF]

, 2019
The timing of final assembly and initiation of subsequent rifting of Rodinia is disputed. New rutile ages (913 ± 9 Ma, 900 ± 8 Ma and 873 ± 3 Ma) and published zircon, monazite, titanite, biotite, muscovite and xenotime geochronology from the Capricorn ...
Agangi, Andrea, Clark, Christopher, Kylander-Clark, A., Occhipinti, S., Olierook, Hugo, Plavsa, Diana, Reddy, Steven, Yao, Weihua   +7 more
core   +1 more source

Confocal Raman spectroscopic study of melt inclusions from peridotite xenoliths in economic and barren kimberlites from Kaapvaal Craton

Journal of Raman Spectroscopy, Volume 55, Issue 10, Page 1090-1104, October 2024.
Olivine‐hosted secondary melt inclusions in xenoliths from five Kaapvaal craton kimberlites of variable diamond grade do not show difference in composition. The composition of 26 minerals identified in the daughter phases suggests carbonate melt rich in alkali, sulfur, chlorine, and phosphorus infiltrated the kimberlite xenoliths.
Sahroz Khan, Yana Fedortchouk, Monika Feichter, Tivadar M. Toth   +3 more
wiley   +1 more source

Stable Isotope Studies of the Rochechouart Impact Structure: Sources of Secondary Carbonates and Sulphides within Allochthonous and Parautochthonous Impactites [PDF]

, 2015
Hypervelocity impacts are among the most ubiquitous processes to affect solid bodies within our solar system [1, 2]. Although they are notoriously devastating, citing responsibility for mass extinction events and global climate perturbations, impacts can
Boyce, A.J., Lambert, P., Lee, M.R., Lindgren, P., Mark, D.F., Simpson, S.L.   +5 more
core  

The Silent VOICE—Searching for Geochemical Markers to Track the Impact of Late Jurassic Rift Tectonics

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract A causal mechanism for the Volgian Isotopic Carbon Excursion (VOICE) remains enigmatic. Elemental geochemical profiles of the Deer Bay Formation, Sverdrup Basin, Arctic Canada that record the VOICE and contemporaneous strata are herein examined to provide insight into depositional environments during Late Jurassic‐Early Cretaceous time. Silver
Jennifer M. Galloway, Thomas Hadlari, Keith Dewing, Terence Poulton, Stephen E. Grasby, Lutz Reinhardt, Mikhail Rogov, Jack Longman, Madeleine Vickers   +8 more
wiley   +1 more source

Potassium metasomatism of volcanic and sedimentary rocks in rift basins, calderas and detachment terranes [PDF]

The chemical, mineralogical, and oxygen-isotopic changes accompanying K-metasomatism are described. The similarities with diagenetic reactions in both deep marine and alkaline, saline-lake environments are noted.
Chapin, C. E., drographic basins.
core   +1 more source

Miocene Alkaline Basaltic Magmatism in Northeastern Tibetan Plateau: Implications for Mantle Evolution and Plateau Outward Growth

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract The widespread Cenozoic alkaline magmatism within and around the Tibetan Plateau offers a prime opportunity to probe the nature of the mantle at the depths where basalt magmas originate. The close temporal and spatial relationship between volcanism and regional strike‐slip fault systems also helps better understand the geodynamics of outward ...
Yue Che, Dong Liu, Zhidan Zhao, Yaoling Niu, Fang‐Zhen Teng, Donald J. DePaolo, Xuehui Yu, Di‐Cheng Zhu, Ningyuan Qi, Xuanxue Mo   +9 more
wiley   +1 more source

Diagenetic dolomite in planktonic foraminifera on the Australian Northwest Shelf

Sedimentology, Volume 71, Issue 6, Page 1744-1766, October 2024.
ABSTRACT Planktonic foraminiferal shells are widely used to investigate past oceanographic and climatic variations via their trace elements and stable isotopes. However, these geochemical methods may be compromised by the presence of diagenetic high‐Mg calcite.
Song Zhao, Katharine M. Grant, Bradley N. Opdyke, Ulrike Troitzsch, Ian S. Williams   +4 more
wiley   +1 more source