Results 31 to 40 of about 1,482 (183)

Redox species and oxygen fugacity of slab-derived fluids: Implications for mantle oxidation and deep carbon-sulfur cycling

Frontiers in Earth Science, 2022
The generation and migration of slab-derived fluids modulate subduction zone seismicity, arc magmatism, and deep volatile cycling. However, the redox species and oxygen fugacity (fO2) (hereafter expressed as log units relative to the fayalite–magnetite ...
Yi-Bing Li, Yi-Bing Li, Yi-Bing Li, Yi Chen, Yi Chen, Yi Chen, Bin Su, Bin Su, Qing-Hua Zhang, Qing-Hua Zhang, Qing-Hua Zhang, Kai-Hui Shi, Kai-Hui Shi, Kai-Hui Shi   +13 more
doaj   +1 more source

Performance comparison of pressure swing adsorption and amine‐based absorption for synthesis gas purification

The Canadian Journal of Chemical Engineering, EarlyView.
Comparison of PSA and amine‐based absorption for syngas purification shows that PSA offers lower energy intensity, global warming potential, and minimum selling price, making it a more sustainable option. However, absorption achieves higher syngas purity. A GREENSCOPE‐based multi‐criteria assessment guides optimal process selection.
Magno Fonseca Santos, Antonio Esio Bresciani, Rita Maria Brito Alves   +2 more
wiley   +1 more source

The effect of oxygen fugacity on the evaporation of boron from aluminoborosilicate melt [PDF]

European Journal of Mineralogy
We present the results of B2O3 evaporation experiments from Ca- and Mg-bearing aluminoborosilicate melts. Our experiments were conducted at 1245 to 1249 ∘C and 1350 to 1361 ∘C for different run times (60–1020 min), and at oxygen fugacities (logfO2 ...
S. Flemetakis, S. Flemetakis, C. J. Renggli, P. Pangritz, J. Berndt, S. Klemme   +5 more
doaj   +1 more source

Petrogenesis, Redox State, and Mineralization Potential of Triassic Granitoids in the Mengshan District, South China

Frontiers in Earth Science, 2021
The Mengshan district is located in the eastern segment of the Jiangnan Orogen in South China. Multi-phase intrusions were emplaced in this district, with the medium-grained porphyritic biotite granite and its marginal phase (fine-grained porphyritic ...
Yanshen Yang, Yanshen Yang, Xiaofei Pan, Zengqian Hou, Yang Deng, Yongpeng Ouyang, Delei Meng, Tao Xie   +7 more
doaj   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Dense hydrous silica carrying water to the deep Earth and promotion of oxygen fugacity heterogeneity

Matter and Radiation at Extremes, 2022
Water has remarkable effects on the properties of mantle rocks, but, owing to the high temperatures in the mantle, uncertainties remain about how and how much water is transported into the deep Earth.
Yanhao Lin, Ho-Kwang Mao
doaj   +1 more source

Apatite in Carbonatite Preserving Primary Magmatic, Post‐Magmatic Overgrowth, and Post India‐Asia Collision‐Related Hydrothermal Alteration: Evidenced From U–Pb Isotope and Trace Element Geochemistry

Geological Journal, EarlyView.
U–Pb isotope and trace element geochemistry of apatite from carbonatites of Peshawar Plain Alkaline Igneous Province, western Himalaya shows Permo‐Carboniferous magmatism, an additional magmatic pulse during Cretaceous, and post‐magmatic hydrothermal/metasomatism during Oligocene. ABSTRACT U–Pb isotope and trace element geochemistry of apatite combined
Mehboob ur Rashid, Hafiz U. Rehman, Hao‐Yang Lee, Sun‐Lin Chung, Kaushik Das, Kazumasa Aoki, Muhammad Jawad Zeb, Nasir Ahmad, Muhammad Hussain, Hiroshi Yamamoto   +9 more
wiley   +1 more source

Constraining Ore-Forming Processes Using Magnetite-Titanomagnetite Chemistry: A Case Study of the Mamuniyeh Cu Mineralization System, Urumieh-Dokhtar Magmatic Arc

Journal of Economic Geology
The low-sulfidation epithermal copper mineralization in the Mamouniyeh area occurs as silica-sulfide-oxide veins hosted by monzonitic, gabbroic intrusions, and andesite.
Mohammad Goudarzi, Hassan Zamanian, Urs Klötzli, David Lentz, Matee Ullah   +4 more
doaj   +1 more source

Thermodynamic Modeling of CO2-N2-O2-Brine-Carbonates in Conditions from Surface to High Temperature and Pressure

Energies, 2018
Nitrogen (N2) and oxygen (O2) are important impurities obtained from carbon dioxide (CO2) capture procedures. Thermodynamic modeling of CO2-N2-O2-brine-minerals is important work for understanding the geochemical change of CO2 geologic storage with ...
Jun Li, Raheel Ahmed, Xiaochun Li
doaj   +1 more source

Phenotypic, physicochemical, sensory, and functional attributes of cocoa (Theobroma cacao L.) from Brazilian Amazonian floodplain and upland ecosystems

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Cocoa (Theobroma cacao L.) from the Brazilian Amazon plays an important role in national production. While most cocoa is cultivated in upland systems, floodplain ecosystems represent a traditional and distinct production environment that may influence bean composition and quality.
Danielle Amaral e Silva, Consuelo Lúcia Sousa de Lima, Giulia Victória Silva Lima, Angela Maria Miranda Silva, Neirivaldo Cavalcante da Silva, Hervé Louis Ghislain Rogez, Jesus Nazareno Silva de Souza   +6 more
wiley   +1 more source