Results 41 to 50 of about 15,904 (206)

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

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +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

A review of volatiles in the Martian interior [PDF]

, 2016
Multiple observations from missions to Mars have revealed compelling evidence for a volatile-rich Martian crust. A leading theory contends that eruption of basaltic magmas was the ultimate mechanism of transfer of volatiles from the mantle toward the ...
Baratoux, David, Beaty, David, Breuer, Doris, Farcy, Benjamin J., Filiberto, Justin, Grott, Matthias, Jones, John H., Kiefer, Walter S., Mane, Prajkta, McCubbin, Francis M., Schwenzer, Susanne P.   +10 more
core   +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

The use of predominance area diagrams (PAD) to determine the oxygen and sulfur fugacities prevailing during historical metallurgical processes: the case of fifteenth to seventeenth century copper slags from Polichno (Old Polish industrial district)

Heritage Science
The study presents the first use of predominance area diagrams (PADs) to determine oxidation–reduction conditions during reconstructing historical copper smelting processes.
Krzysztof Kupczak, Rafał Warchulski, Aleksandra Gawęda, Marta Ślęzak, Piotr Migas   +4 more
doaj   +1 more source

Oxygen fugacity of Alto Paranaíba kimberlites and diamond instability: Três Ranchos IV and Limeira I intrusions

Brazilian Journal of Geology, 2020
Oxygen fugacity (ƒO2) conditions were established for Três Ranchos IV (TR-IV, diamond-bearing) and Limeira I (LM-I, barren) kimberlite intrusions, in Alto Paranaíba Alkaline Province, to constrain a possible correlation between fO2 and diamond ...
Bruna Coldebella, Rogério Guitarrari Azzone, Luanna Chmyz, Excelso Ruberti, Darcy P. Svisero   +4 more
doaj   +1 more source

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

Mechanisms and Geochemical Models of Core Formation

, 2015
The formation of the Earth's core is a consequence of planetary accretion and processes in the Earth's interior. The mechanical process of planetary differentiation is likely to occur in large, if not global, magma oceans created by the collisions of ...
Abe, Agnor, Alexander, Asahara, Bagdassarov, Ballhaus, Cameron, Canup, Cerantola, Chambers, Corgne, Dahl, Deguen, Fischer, Frost, Halliday, Hartmann, Hevey, Holzapfel, Holzheid, Holzheid, Hustoft, Jacobson, Kendall, König, Landeau, Li, Li, Liebske, Mann, Mann, McDonough, Minarik, Morbidelli, Nimmo, Nimmo, O'Brien, O'Neill, Olson, Palme, Reese, Ricard, Righter, Rubie, Rubie, Rubie, Rubie, Rubie, Rubie, Rudge, Samuel, Shannon, Shannon, Shi, Siebert, Solomatov, Stevenson, Takafuji, Terasaki, Terasaki, Terasaki, Terasaki, Tonks, Tuff, Urey, von Bargen, Wade, Walsh, Walte, Walte, Wood, Wood, Wänke, Yoshino, Ćuk   +74 more
core   +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